Loyalty glossary · 4. Airline-specific (30)
Codeshare
Codeshare is an agreement where one airline sells a flight under its own number but another operates it. Earn rates on such flights depend on the marketing carrier's accrual rules, not the operating carrier, and members often earn nothing when the operating airline is not a programme partner.
A codeshare ticket does not tell you where the points come from. The airline selling the ticket owns the marketing code, but the airline flying the aircraft owns the earning decision, and the two are often different. Loyalty members learn this after travel, when the miles fail to post.
Accrual follows the operating carrier's partnership status, not the marketing carrier's published table. A programme pays its published earn rate when the operating carrier is a programme partner. When the operating carrier is not a partner, the same flight with the same marketing code earns nothing. No programme publishes that prominently at booking, because it would make the ticket look worse than it is.
Work the numbers, because the gap hides in plain sight. Take a 400 dollar fare on a route sold by your programme's airline but operated by an airline outside its partner list. If your programme awards 5 points per dollar when the operating carrier is a partner, a partner-operated flight would credit 2,000 points. The codeshare with a non-partner operator credits 0 points. The difference is 2,000 points for the same cabin, same route and same fare.
ASC 606 makes the accounting explicit. When a programme issues points on a codeshare operated by a partner, it must defer revenue for the points' standalone selling price and recognise it when the points are redeemed or expire. A codeshare operated by a non-partner creates no such deferral, because the programme never promised points. The liability follows the promise, not the flight number.
Award availability then compounds the confusion. A programme may list codeshare flights as available, but the operating carrier releases only a small share of its seats to partner programmes. The marketing carrier's calendar shows inventory it does not control, and the member blames the programme when no seat can be confirmed. The constraint is the operating airline's yield management, not the loyalty programme's IT.
Before booking a codeshare, check the operating carrier. Earn rates, elite credit and award seats all follow the airline that owns the aircraft, not the one whose code is printed on the ticket. That is the only rule that matters.