Discover Airlines
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Online check-in - app is not working
Booked a comfort class ticket and upgrade. During the check-in process an error message came up "upgrade not yet paid" so I couldn't do the online check-in. I had a train ticket connected to this trip so I never was able to check in and get the train ticket. Once at the airport tickets were issued as booked. Unfortunately too late for my return from Cologne to Frankfurt. So I had to buy another train ticket. Calls to the company were very unsuccessful. Forwarded to different agents and problem was never solved. Try to use another airline to Europe if you want a smooth trip.