Hello all:

If I am going to get a Y fare and attempt to upgrade with miles to business on an international flight, how should I used seatcounter to my advantage? What am I really looking for? I would assume the more open C seats, the better; but what about a flight that is filling up fast...is there any advantage to that flight? (possible op-up, etc.). Any tips would be useful...thanks!

Thanks. I am a new 2P becoming a 1P after my next flight.