Shops will be closed on Sundays, but Frankfurt is rather compact and public transportation rather good.
From the Airport you can take the S8 or S9 towards downtown, travel time is only 11 min. I would suggest to exit at Taunusanlage and walk towards the Alte Oper, from there via Fressgasse to Hauptwache where you will be at the biggest shopping street in Europe, called Zeil, which of course is baseless as it is sunday. But you can walk from there to the old town and the river.
From there you can walk back to Hauptwache for the S-Bahn train to the Airport
As most places will be closed that early, you can depend on bakerys that will be open and get some great food/coffee or other drinks
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7 hours is pretty awkward. Unless you are happy cutting things close, you have only about 3 hours in Frankfurt. And Sunday morning is pretty dead. I would take the U-Bahn to the Old Opera and walk towards the Hauptwache. The Pauluskirche is the site of the attempt at parliamentary government in 1848. Then comes the Roemerberg. You can keep going in that direction and ultimately cross the Main into Sachsenhausen. Schweizerstrasse is OK and the museums along the south bank of the Main are good, the Staedl in particular. Then cross back over the Kennedy Bridge and return to the airport. If you are delayed in arriving, I would take the bus to the Steigenberger and enjoy a great breakfast there. The airport offers showers for about 8 Euros. If your flight in has been long, there's nothing like a long, hot shower. The other alternative is to take the train to Mainz, getting off at the Roman Theater. Then walk towards the Rhine, possibly having breakfast at the Hyatt (which is pretty terrific in every respect). Then on towards the cathedral. Continue to the main train station and return to the airport. Mainz is smaller and easier to see in just a few hours. If you don't know Germany, your friends will be more impressed that you sat drinking a cappuccino watching the Rhine flow by than walking by the Main. (I can't think of a cafe in Frankfurt with a view of the Main. Another poster can provide that.)
My point was to exit Taunusanlage S-Bahn station to walk towards the Old Opera House and go to explore the city from there, not to spent time there.
7 Hours are plenty of time, S-Bahn runs every 15 minutes and it takes 11 minutes to the main railwaystation. 20 min to Sachsenhausen.
In 7 hours, you can get a meal in at a Sachsenhausen Appleweintavern after exploring the city
I calculated 3 hours free. I deducted time that it takes to get through the airport (walking, possibly passport control, baggage?) and then arriving back 2 hours before flight time. If you have 7 hours IN Frankfurt (or on the train going in and out), then it's a very different proposition. Just walking through the Frankfurt airport can take 10-15 minutes.
Getting off the train at Taunusanlage means you get to see the beautiful Alte Oper all lit up at this time of the morning. The lights of the city are very pretty and it is rather nice to walk around and watch the sun come up. If you can be down at the river by then, this is a good spot to watch the sunrise. This is about a 20 min. walk from the Alte Oper. To return to the airport, you might want to take the tram #11 or #12 from the Römer to the main station, and get your train there. In fact on Sundays, your train from the airport may end here instead of going on to Taunusanlage where the Alte Oper is. Every 2nd train does this.
Sorry for an off-topic, but can anybody explain to me, why my comment above was deleted. It says that "This post was determined to be inappropriate by the TripAdvisor community and has been removed". Who is the "TA community"? What inappropriate did they find there? I only said that I disagree with the suggestion to start the itinerary at Taunusanlage, and instead suggested to visit Sachsenhausen. No personal comments, no mentioning of any business, nothing incendiary. No adult stuff. Just a dry piece of information.
I have posted hundreds of comments on TA and that has never happened before. I am puzzled. Any clue?
@mdinai Not sure why, it usually takes 2-3 people to flag your post to have it removed. Do not take it personal, I had a post removed for suggesting a Applinewine Tavern. It happens.
I'm no fan of apple wine, but I think it was a harmless suggestion. I agree that the Old Opera is quite beautiful as is the area around it. Just to the back is the office complex Die Welle, which is bland on the outside and nice in the inner court. Manufaktum is across the street and offers good breakfast pasteries and odd bits of equipment and clothing you will not find elsewhere. Not sure if it is open Sundays.
No, all stores are closed on Sundays and this area behind the Alte Oper is super dead on the weekends when all the offices are closed. Especially this early in the morning.
With the whole rest of Frankfurt to see, he needs to head into the middle of the city where bakeries are open, the Christmas decorations are lit up and the medieval churches are located.
No idea why that post was removed either. It was perfectly fine.Edited: 3 years ago