Cheap Flights from St. Louis to Portland from $51 | (STL - PDX) - KAYAK
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Find cheap flights from St. Louis to Portland from $51

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Portland departing on 5/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 5/18
Sat 5/25

Search hundreds of travel sites at once for deals on flights to Portland

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Portland.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Portland.
In the last 7 days travelers have searched 44,471,296 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to Portland (STL-PDX)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Portland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:04 pm - 6:48 amSTL-PDX
12h 44m1 stop
8:40 am - 9:31 pmPDX-STL
10h 51m1 stop
$89Frontier
Find Deal
Wed, May 15 - Mon, May 20
8:04 pm - 6:48 amSTL-PDX
12h 44m1 stop
8:40 am - 9:31 pmPDX-STL
10h 51m1 stop
$90Frontier
Find Deal
Wed, May 15 - Mon, May 20
10:59 pm - 9:15 amSTL-PDX
12h 16m1 stop
5:20 am - 10:46 amPDX-STL
27h 26m1 stop
Thu, May 9 - Tue, May 14
10:59 pm - 12:26 pmSTL-PDX
15h 27m2 stops
12:00 pm - 10:46 amPDX-STL
20h 46m1 stop
Thu, May 9 - Tue, May 14
2:48 pm - 12:33 amSTL-PDX
11h 45m1 stop
3:57 pm - 10:46 amPDX-STL
16h 49m1 stop
$159Spirit Airlines
Find Deal
Fri, May 3 - Tue, May 7
7:30 pm - 10:30 pmSTL-PDX
29h 00m3 stops
3:57 pm - 10:46 amPDX-STL
16h 49m1 stop
$219Spirit Airlines
Find Deal
Thu, May 16 - Tue, May 21
6:09 pm - 11:17 pmSTL-PDX
7h 08m1 stop
3:05 pm - 11:49 pmPDX-STL
6h 44m1 stop
$298American Airlines
Find Deal
Wed, Jul 31 - Wed, Aug 14
5:08 pm - 10:53 pmSTL-PDX
7h 45m1 stop
9:00 pm - 8:32 amPDX-STL
9h 32m1 stop
$320American Airlines
Find Deal
Thu, May 30 - Fri, Jun 7
6:06 am - 12:35 pmSTL-PDX
8h 29m1 stop
5:19 pm - 12:57 amPDX-STL
5h 38m1 stop
$344Delta
Find Deal
Tue, Jun 25 - Mon, Jul 1
11:54 am - 6:21 pmSTL-PDX
8h 27m1 stop
3:15 pm - 12:46 amPDX-STL
7h 31m2 stops
$361Delta
Find Deal
Fri, May 3 - Tue, May 7

Flights from St. Louis to Portland - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to Portland to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Portland?

The average price of all flights from St. Louis to Portland clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from St. Louis to Portland, look for departures on Saturdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Portland, Saturday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from St. Louis to Portland?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Portland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to Portland is September, where tickets cost $364 on average. On the other hand, the most expensive months are December and June, where the average cost of tickets is $527 and $516 respectively.

How far in advance should I book a flight from St. Louis to Portland?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Portland, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to Portland, you should book around 4 days before departure. For the absolute cheapest price, our data suggests you should book 53 days before departure.

Which airlines provide the cheapest flights from St. Louis to Portland?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from St. Louis to Portland found on KAYAK was with Frontier for $51. Frontier proposed a round-trip connection from $89 and Spirit Airlines from $159.

Good to know

Low season

February

High season

July

Cheapest flight

$51
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 9% increase in price.
Flight from St. Louis to Portland

When to book flights from St. Louis to Portland

Are your dates flexible? Find out the best times to travel from St. Louis to Portland based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Portland

  • What are the transport options from Portland International Airport?

    The easiest way to get downtown is by taking the light rail. PDX is connected to the city by the MAX light rail system, and the Red Line trains depart every 15min. You can also take the shuttle from PDX with several companies offering door-to-door and inter-city shuttle services from PDX. Taxis are also available on the lower roadway around baggage claim, and no reservations are needed. Car rentals are available too, and most companies provide shuttle services from the baggage claim area to the offsite car rental station on the lower roadway.

  • Does Portland International Airport offer accessible services?

    The airport has provided elevators and ramps for passengers in wheelchairs. People with limited mobility also get reserved parking spots, accessible restrooms, fast track services, and dedicated seating areas. Aira services are available for low-vision passengers traveling through PDX. They will also be allowed guide dogs, and braille signage, audio announcements, and tactile guide paths are provided to guide them through PDX. Visual paging is available for the hard of hearing, and TDD telephones are also present at PDX.

  • Which airlines have lounges at Portland International Airport?

    Alaska Airlines, United Airlines, and Delta have lounges at PDX. Delta runs the only members-only lounge at PDX, while the other two options you can access by paying at the door. To access these lounges, you must show your flight ticket and pay a one-time fee. The Delta lounge is on Concourse D airside, Alaska lounge is on Concourse C airside, and United Club is on Concourse E airside. The airport also has a USO lounge for active US military members landside on the mezzanine level.

  • Does Portland International Airport offer family services?

    PDX offers nursing rooms for mothers who are traveling with infants. The nursing rooms provide comfortable seating, fold-down tables, and power outlets. The PDX nursing facilities are airside near the south lobby and around Gate D2. The airport has also provided a children’s play area for passengers with older kids. The PDX play areas are two, and they are both airside around Gates C17 and D7.

  • What is the cheapest flight from St. Louis to Portland?

    In the last 3 days, the lowest price for a flight from St. Louis to Portland was $51 for a one-way ticket and $89 for a round-trip.

  • Do I need a passport to fly between St. Louis and Portland?

    No

  • Which airports will I be using when flying from St. Louis to Portland?

    St. Louis and Portland are both served by 1 main airport. You will leave St. Louis from Lambert-St Louis and will be arriving at Portland.

  • Which aircraft models fly most regularly from St. Louis to Portland?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Portland?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between St. Louis and Portland, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Portland from St. Louis?

    Denver is the most popular layover city among KAYAK users traveling from St. Louis to Portland.

  • Which is the best airline for flights from St. Louis to Portland, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Portland are Alaska Airlines and Delta. With an average price for the route of $419 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $423 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from St. Louis to Portland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Portland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Portland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Portland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portland with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and PDX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Portland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portland from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from STL to Portland

  • St. Louis Lambert International Airport (STL) comprises two terminals and five concourses, A to E. The airport has provided courtesy shuttles for inter-terminal transportation, which run every 5-10min.
  • STL welcomes all pets to the airport. The airport has provided six relief areas: four indoors and two outdoors. The indoor areas are airside, and the outdoor areas are outside Terminal 2 and on the upper west side of Terminal 1.
  • Around 1,084 kg of carbon is emitted on flights from St. Louis to Portland. You can fly more sustainably with Frontier Airlines; they offer a flight emitting 60% less carbon per passenger.
  • Unwind after your flight with a holistic massage or facial at the Dragontree Spa at Portland International Airport (PDX). The spa is open between 9 am and 8 pm and is on Concourse C airside.
  • US Bank has a full-service branch at STL for those in need of banking or currency exchange services. The bank is open weekdays from 8 am to 5 pm and sits on the lower level of Terminal 1.
See more tips

Prefer to fly non-stop from St. Louis to Portland?

Find which airlines fly direct from Lambert-St Louis to Portland, which days they fly and book direct flights.

Nonstop departures

Lambert-St Louis to Portland

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Nonstop returns

Portland to Lambert-St Louis

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from St. Louis to Portland

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Portland. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Portland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.1
Alaska AirlinesOverall score based on 9106 reviews
8.2boarding
7.3food
7.9comfort
8.6crew
7.3entertainment
Airline reviews

I was not given a seat when I bought the ticket. I know airlines are trying to squeeze every penny out ot the customer, but we are buying a seat on the airplane, right? I find this irritating with all airlines, but especially Alaska because I fly it so often. No sense of customer use and loyalty.

6.0 GoodMary, Apr 2024LAX - PDX
Read more about Alaska Airlines reviews

I was not given a seat when I bought the ticket. I know airlines are trying to squeeze every penny out ot the customer, but we are buying a seat on the airplane, right? I find this irritating with all airlines, but especially Alaska because I fly it so often. No sense of customer use and loyalty.

It was adequate nothing special no entertain because flight was short. Crew pleasant.

All employees were very nice and I was very comfortable

Loved the gate agent and flight attendants. All were extremely helpful.

It was a good flight, wish they would have handed out snacks though.

Multiple delays and when we landed zero help getting to and making connecting flight.

There were no gluten free snacks and it wasn’t clear how to access entertainment.

Seat space Terrible. No real food on a 6 hour flight

On check in, the agent would not accept the credit card that I booked the flight on to pay for a checked luggage. It had the agency name that I work for on it, but my flight was booked on it so it did not make sense. So I used my personal CC. Then they could not give me a receipt for the checked baggage, and directed me to go to Alaskaair.com and find my way around to print up a receipt for my expenses. Should have been a lot more customer friendly for something so simple.

Wish better snack options on such a long flight. The seats seemed tight on space. Everything else was excellent. Would definitely fly Alaska again.

Everything was great except for the seat. The backrest would not stay in the upright position.

I usually have a positive experience with Delta. Complimentary upgrades are always nice!

Flight delayed about 2 hrs so it made it a VERY late night

It was a crowded flight. They did the best they could.

Service was good for such a short flight. Small plane but smooth flight.

Worst flight in my life. Only was scheduled for a 45 min flight to get our connection flight. It was late by 40 minutes and we missed our connection. Delta was totally useless trying to help and unable to get my family on the next flight because they overbooked it Thus had to get a hotel at my expense and lost a day at Disney as a result. Cost me about a $1000 if you add 2 hotels meals shuttles etc to get thru the day Awful customer service by Delta in Detroit totally useless people

The experience was good and the flight departed on time and landed early

The flight was delayed but we got to our final destination.

Boarding was great. The flight landed early. It took the crew over an hour and a half to bring out drinks. I paid to upgrade my seat to Comfort+ only to be near a crying/screaming baby who was seldom quiet. Noise-cancelling earbuds didn’t even help. Waste of money to upgrade.

Seats in first class on the E175 recline too far back. I was in 2A, and the man in 1A fully reclined almost the entire flight. It took 6-7 inches of space away from me and made it very difficult to work on my laptop.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

flight delays, staff only communicating when pushed, food service lasting a grand total of 7 minutes, stuck in seat from 45mins into flight until landing

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

they made me check my carryon. There was space in the overhead bins.

Nice flight, nice crew but no cookie or napkin with my seltzer.

Trip was smooth bumpy from the wind but no issues at all the crew attendant was very pleasant and had great customer service

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

It got me where I needed it to; not much more. It had no competition so that was why I chose it.

I liked everything about the flight. The service was excellent!

The customer service was excellent! Check-in, baggage check-in, boarding, the flight went very smooth.

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Plane took off without me, my stepdad and a dozen other passengers. It went from an hour delay to boarding in 15 montures without notifying anyone. Names were not called overhead. Now I’m missing a day of work and stuck in Charolette overnight paying for a hotel and Ubers out of pocket

I arrived to the airport 2 hours before my American Airlines flight was scheduled to take off. I have TSA pre-check. The airport was crazy packed when I arrived. After momentarily standing in the pre-check line, the TSA agent said that I am not pre-check. Of course I said that I am because I entered my KTN number on all my traveling sites and programs. I had to get out of line and go back to the AA counter to discover that American Airlines did not add my KTN to my boarding pass. I had to call TSA to find out my number, then have AA enter it onto my boarding pass. The emblem would not load onto my boarding pass. By this time, I decided to use my Clear in order to get through TSA but the line was ridiculous long. By the time I made through TSA, I missed my 11:08am flight and was re-booked for the 5:30pm. This is after the AA employee told me I should have gotten to the airport early. AA use to be a dependable airline not I use them only if I have too.

Average - flew with Jet Blue internal and it was far more comfortable and better food and entertainment. Notable difference

Flight from SBP to DFW 1. They rerouted us through PHX 2. Delayed flight out of SBP for 3 hrs so we missed our connection Downgrade on rerouted flight. Back of the plane, center seats, didn't sit together 4. Return flight out of DFW same exact thing. Delayed, missed connection, Downgrade + they lost our luggage! A complete mess.

On the new 319 NEO? seatback entertainment system did not work even when the flight attendant rebooted it. At least I had my cell phone to connect with wifi.

Good flights. Departure and arrivals were on time. DFW was a little problematic in that the Skytrain without prior notice bypassed the Echo terminal so that delayed my arrival at my connecting flight.

Do not eat the bagel! Otherwise, good albeit late, breakfast in first. Boarding downgrade only because flight was delayed due to plane change due to undisclosed problem with original aircraft. I did not use entertainment.

Because I can’t stand very long in one place, I was allowed to reword.

It was a good flight. Of course it was full, but it went well.

Not have to pay for every single item to take a flight. Seating and delays sucked.

Flight was cancelled and I had to spend the night in the airport lugging my suitcase around

If you don’t check in 24 hours in advance, they will charge you $110 to check your bag instead of the $30. I did not get an email with this information and did not check in. In addition, my flight home was cancelled at layover and I had to spend the night in the airport, and then have another layover at another airport before making it home. Will not fly frontier again.

Terrible. Seats are bad and the baggage policy is inconsistent

Flight delayed 3 times, resulting in late arrival, rental car place gave car away resulting in increased BS charges because I was late. Frontier blows.

I paid for extra leg room. The flimsy plastic seat underneath the floatation seat did not line up with the arm rests. It seemed as if the plastic part was zip tied on but immovable. This caused severe uncomfortable for the duration of the flight.

Left Denver late, then sat on tarmac 30 min after arrival

Better than I expected but I did pay for a seat and carry on bags ahead of time.

Crew members are very rude and not cooperate with passengers.

30 minute delay due to boarding and settling of a family.

Book cheap flights from St. Louis to Portland

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Portland found on KAYAK in the last 72 hours.
5/8Wed
1 stopFrontier
13h 12mSTL-PDX
$51
5/9Thu
2 stopsFrontier
15h 27mSTL-PDX
$56
5/8Wed
2 stopsFrontier
21h 48mSTL-PDX
$60
4/29Mon
1 stopSpirit Airlines
29h 22mSTL-PDX
$85
5/30Thu
1 stopAmerican Airlines
8h 44mSTL-PDX
$160
5/19Sun
1 stopAmerican Airlines
7h 38mSTL-PDX
$168
7/8Mon
2 stopsDelta
8h 18mSTL-PDX
$186
7/20Sat
2 stopsUnited Airlines
17h 56mSTL-PDX
$289
4/29Mon
2 stopsUnited Airlines
19h 13mSTL-PDX
$334
9/29Sun
2 stopsAlaska Airlines
13h 39mSTL-PDX
$347

Search by stops

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Last minute flights from St. Louis to Portland

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Portland that are departing in the next 10 days.
4/20Sat
multi-stopFrontier
10h 18mSTL-PDX
4/22Mon
multi-stopFrontier
12h 51mPDX-STL
$199
4/23Tue
multi-stopFrontier
9h 09mSTL-PDX
4/24Wed
multi-stopFrontier
7h 39mPDX-STL
$208
4/23Tue
multi-stopFrontier
9h 09mSTL-PDX
4/23Tue
multi-stopFrontier
6h 48mPDX-STL
$213
4/23Tue
multi-stop
14h 15mSTL-PDX
4/25Thu
multi-stop
19h 06mPDX-STL
$237
4/23Tue
multi-stop
14h 15mSTL-PDX
4/24Wed
multi-stop
19h 10mPDX-STL
$238
4/23Tue
multi-stopAmerican Airlines
6h 38mSTL-PDX
4/24Wed
multi-stopAmerican Airlines
10h 08mPDX-STL
$327
4/23Tue
multi-stopUnited Airlines
6h 30mSTL-PDX
4/24Wed
multi-stopUnited Airlines
12h 54mPDX-STL
$571
4/20Sat
multi-stopUnited Airlines
6h 10mSTL-PDX
4/23Tue
multi-stopUnited Airlines
13h 15mPDX-STL
$603
4/20Sat
multi-stopDelta
12h 31mSTL-PDX
4/22Mon
multi-stopDelta
8h 01mPDX-STL
$773
4/21Sun
multi-stopDelta
12h 09mSTL-PDX
4/24Wed
multi-stopDelta
8h 01mPDX-STL
$897

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St. Louis - Portland Flights

Departure:

St. Louis (STL)United States

Destination:

Portland (PDX)United States

Return flight deals:

Portland - St. Louis

Cabin classes: