OLCI with Delta or Air France
I'm on a trip in Economy, RDU-JFK-PRG, BUD-CDG-ATL-RDU in September that is booked through Delta. But the first segment on the return is Air France. Flight 1395. I am not able to book seats on the BUD-CDG segment. Because I don't have a seat assignment until check in, is it better to check in through Delta, or through AF? I want to make sure I have a seat assignment, asap. I believe check in is allowed 30 hours before the flight.