No such thing. You could do a one-way calendar search in each direction. However, this won't show roundtrip award fare options if you are looking for an open-jaw booking with Saturday night stay. To get those, you generally want to do a roundtrip calendar search from origin to destination, and then repeat roundtrip with same origin, but with the destination the city you want to return from . Click on the Fare Rules link to see the fare components in each direction and then use multi-city combine the cheapest outbound and return options. Depending on route, and if you are only looking for availability at lowest level, you may not need to do the roundtrip searches and just do one-way's. For example, low-level TATL D1 awards are 80K (CSV800 fares) and do not require a roundtrip purchase. They do, however, have a 90-day advance purchase requirement. Partner awards also do not have a roundtrip purchase requirement. However, the cheapest ones generally have a 60-day advance purchase requirement.