Originally Posted by
Unterwegs
First of all: 1:20 should be sufficient to go thru immigration/customs and walk to the bus station. Normally she should be able to make it. If not:
Take the train. Check
www.Bahn.de, Frankfurt Airport (long distance train station, about 5 min walk from Terminal 1) to Strasbourg (Main Station). Takes a bit over 2 hours, costs 60 Euro or less. Pick a connection with only one connection, there should be at least one per hour.
In case she misses the bus: just walk to the long distance train station, buy the ticket inside the train station and have them print out the schedule.
Even if the tain is delayed or she misses the connection it will be very easy to get there before 17:00.
I often travel this route, only once taking the bus though from FRA - XER. I had plenty of time to make a 1hr45min connection. The only thing that was slow for me was luggage coming from the belt. Passport etc quick (but I have EU passport). As above, train is my go-to for FRA-Strasbourg travel. I usually try to keep connections to a minimum which means taking the train from the long distance train station at FRA (which by the way is in the same place as the bus departure for Strasbourg), changing at Mannheim or Karlsruhe and then continuing direct on either an ICE or TGV to Strasbourg. Total travel time can vary from 2.15hrs to 3hrs or so depending on connections. But the connections are usually very simple and even often involve no lugging luggage up and down stairs to different platforms.
Having said all that, I was scheduled to travel next Thursday by the TGV line from Strasbourg to Frankfurt and due to French strikes I've been warned that my train is likely to be cancelled (so I cancelled anyway and made alternative arrangements). The cancellations seem to mainly affect the French trains though, so picking an ICE or DB train is a safer option if travel is in the near future.
But don't fret about the bus, it should be ok. And there are lots of options to get to Strasbourg by 5pm.