: Use the current market price for the exact same flight, including all fees you would actually pay.
To determine if your redemption is a good deal, use this standard equation: use miles or buy ticket calculator
\text{Cents Per Mile (CPM)} = \frac{\text{Cash Price of Ticket} - \text{Award Taxes & Fees}}{\text{Number of Miles Required}} \times 100 : Use the current market price for the