Originally Posted by Reymont

Oh! And I should have as many as 35 500-mile upgrades at the start of this trip. I've never used them before -it'd be nice to use them on the longest flights, but I understand you don't always have the option. What are my chances of successfully using them on the DFW-SYD, NRT-DEL, DEL-HEL, and LHR-BUE flights?