I do not fly often, but would love to find the best way to earn and use miles for 2 roundtrip flights from NYC to London in August. In first class. Ridiculous? Maybe business class? Impossible? I'd really appreciate suggestions. I'd love to know which new card(s) to sign up for which would translate to the best way to earn miles for this flight route. Also, I'm not certain of the processing time for new card approval and bonus turnarounds. How quickly do miles get posted so you can use them? Years ago I did the double browser trick for two new card bonuses, which was great. I've tried doing some research, but I think I need to at least narrow down the field to a certain airline so I can focus. There's a lot of great info out there, but there are so many ways to earn point and use points and transfer them to different programs that I am very overwhelmed. Thank you so much for your help!