Originally Posted by
DLATL777
I definitely didn't intend to insinuate that ALL fares have both none-refund and refundable variants. Often certain level of economy fares will have zero refundable variants for example. It also varies by market-often one market will have variants that are refundable when another will not as you are seeing above.
It gets complicated with TATL fares due to having fares that allow for stopovers and ones that don't (domestic fares, other than Hawaii, don't have stopover allowances). Both BOS-AMS and BOS-MUC have non-refundable/refundable D1 fare filings for C/D/I/Z fares (only J fares are all non-refundable). It's just that BOS-AMS has a much wider variety of fare filings including roundtrip fares with only 12-hour and 3 day min stay requirements. Further, some of the refundable BOS-AMS roundtrip fares allow for stopovers, while the matching non-refundable BOS-AMS fares do not. In this case, it's actually cheaper to book as refundable BOS-AMS roundtrip fares with BOS-AMS + AMS-MUC(stopover)-BOS fare constructions than non-refundable/refundable BOS-MUC + MUC-BOS fare constructions when roundtrips do not include Sat night/7 day min stays. As counter-intuitive as it may seem, it's actually doing something here to save you some money.