Originally Posted by
dublin487
Slight variation - what if, with Delta selected as my airline, I book a roundtrip economy itinerary in which the outbound is marketed by Delta (operated by Air France), but the return is both marketed and operated by Air France?
I don't recall seeing any DPs as such so someone should test it out and let us know if it works

. My hunch is that it would work due to the outbound being DL so my guess is that it will ticket as DL roundtrip being that these 2 airlines are partners and do codeshares.
Originally Posted by
ceflyer
I would look carefully at the checkout screen in this situation. It would be extremely unusual for a ticket to have Delta as the outbound marketing carrier and AF as the inbound marketing carrier. It would mean you are buying two separate one-ways, which for a transatlantic trip would likely be much more expensive
No, it's not considered 2 separate one ways from what I can see in replicating what the OP is trying to do. As I mentioned above, DL and AF are partners and do codeshares so on Amex travel it is possible to select DL marketed flight on the outbound and AF marketed on the return and pay the roundtrip price. On Amex Travel once you select the outbound flight on a roundtrip itinerary, the only options I am ever shown for the return is on the same airline or codeshares as I chose for the way out and is eligible to buy as a roundtrip fare. For example, once I chose a DL flight (or DL marketed) going from US to Paris, all the return options are only DL or AF (marketed) flights. I am not shown any options with Virgin or Swiss or BA or UA or anyone else which would certainly indicate separate one ways.