Custom Burgers by Pat LaFrieda, LaGuardia Airport. Loc: Terminal D, Post-Security. You might not have control over your flight, but you'll have complete control over your burger at Custom Burgers by Pat LaFrieda. Use the handy touchscreen to design your dream burger; you can add toppings as exotic as a fried egg or as traditional as cheddar cheese. Best of all, a simple cheeseburger starts at less than $5, an astonishingly reasonable price for an airport meal.