Calculate the value of frequent flyer miles.
A mile is worth the cash fare it displaces, less the taxes and carrier surcharges you still have to pay on the award. That subtraction is essential and frequently overlooked: a 145 fee against an 890 fare removes 16 percent of the value before you divide by anything. Achievable benchmarks rise with cabin because premium cash fares are priced far above their marginal cost while award charts are not — around 1.2 cents a mile in economy, 1.8 in business, and above 2 in first. That is why redeeming for long-haul premium cabins is where mileage programmes deliver disproportionate value, and why economy redemptions on cheap routes rarely justify the balance.
Net value
Net = cash fare - award taxes and carrier fees
Value per mile
Cents per mile = net value x 100 / miles required
Because you pay them in cash on top of the miles, so they are not saved. On some carriers the surcharge on a long-haul award runs into several hundred, which can halve the effective value per mile. A redemption that looks strong on the mileage cost alone can be mediocre once the cash outlay is included.
Yes, and this is the most common error. Valuing a business award against a 6000 full-fare ticket you would never purchase produces an absurd figure. Compare against what you would genuinely have paid — often the economy fare — unless you truly would have bought the premium seat.