Using miles to fly for Thanksgiving? These are the most expensive and cheapest routes

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Airline ticket prices have surged this year, especially for travel over the holidays. Don't expect many bargains if you're booking flights with miles, either. Tickets bought with frequent flyer miles for flights between large U.S. airports over the Thanksgiving travel period will cost 32% more than last year's holiday, according to data from Seats.aero, a miles and points redemption search site. While fares have skyrocketed this year, airline executives last month said demand remains strong. Airlines have largely gotten rid of static mileage redemption charts in favor of dynamic pricing, making budgeting for an award ticket more difficult. Dynamic pricing means redemption costs change depending on demand, routes and other factors.