Oh, and I do take into account discount certificates, vouchers used when calculating the cost. However, I do not take into account the bus fare from Vancouver to SEA, any layover costs (usually no hotel for me), and other travel costs (meals).
keithguy, I think applying vouchers, etc. makes the cost per mile number calculated only of interest to the individual and not useful to others for comparison. Also, if we are looking at the cost per mile ("earned") after all savings and bonuses, it also then seems we should include the parking, hotel, etc. costs. I think a post that says a fare and possible routing is 2.5c/status mile is more meaningful and standard setting than a cents per mile that was reduced by a voucher.