This December, Burger King is launching the “Delay Your Way” promotion, offering delayed travelers a free Impossible Whopper sandwich to make holiday travel a little bit better.

The steps are simple. Starting December 18 through 30, travelers at any airport in the U.S. can download the BK app and enter their delayed flight information on the “Delay Your Way” screen. Once the flight information is entered, app users will automatically receive a coupon for a free Impossible Whopper that can be redeemed at any participating Burger King restaurant in the U.S.

The Impossible Whopper is 100 percent Whopper, zero percent Beef, flame-grilled just like the original Whopper sandwich but with a patty made from plants and topped with freshly chopped lettuce, tomatoes and onions.

One per guest. Applies only to U.S. domestic flights before departure. BK App registration required. Location Services must be enabled on your device. Coupon must be redeemed on or before January 6.