First-class flights are about to get tastier for some Delta fliers. Delta Air Lines has just announced that their partnership with Shake Shack is going to be expanded to routes out of four cities. Beginning today,

Delta Air Lines Inc. will offer Shake Shack Inc. burgers to first class passengers on longer flights departing from New York’s LaGuardia Airport starting on Tuesday.

Better than picking up an order of airport Shake Shack to-go and carrying it on board, hot Shack burgers are now served in-flight on select Delta routes.

First-class customers on Delta will have the option of ordering a Shake Shack burger from four U.S. flight markets.

Delta passengers flying out of Los Angeles will soon be able to enjoy Shake Shack on select flights, as the fast casual chain and the airline announces an expanded partnership. In November, Delta announced that first class passengers on flights of more than 900 miles out of Boston could pre-select food from the Shake Shack