If you don't have status, it is also worth considering how much you will pay to check baggage. If you are paying for two bags in each direction, then the price difference to fly F is much less, as the luggage that you otherwise would have paid is included--i.e. if you are otherwise paying $60 each way for luggage, then the $260 price difference effectively drops to $140 roundtrip or $70 extra each way to fly F on a 2.5 hour flight.