Coupons didn't 工作 for the return either, we again got row 5, although while checking the luggage we were told that I (and not my better half) would be 升级d at the gate. I let her sit in 1D 和 I stayed in 5 (was neither going to eat nor drink, anyway). I found out after arriving home that they 升级d w/o the coupon, thus they gave me double miles No trips planned for next month, so all four of this year's 升级 coupons will remain unused!
KLouis：您的回程航班有商务舱吗？如果航班比免费更经济"upgrade" is simply being relocated to a front row. The coupons are an 升级 to Business class. If your flight didn't have business then that explains why not coupons were used.