Most meals served on airlines, trains and cruise lines are may be designed to distract passengers rather than nourish them. However, virtually all carriers can accommodate requests for special food preferences. Simply ask your travel agent or airline reservation clerk as you're booking your travel to make a special meal request for you. Keep in mind that you don't have to eat all the food served to you, especially on long international flights when you're not getting any exercise.
Fast Food Try to avoid fast food restaurants as an option for a meal.
If you absolutely must rely on them, several chains now offer healthy menu items. If you are travelling in a car, a good option is to pack a cooler with healthy sandwiches and snacks, such as fruit or bite-size vegetables. Add some rice cakes and air-popped popcorn for other healthy snack options. It may take a day or two after you return home to replenish your supply of healthy food. Always stock the kitchen before you leave with enough food for one or two healthy meals, even if you have to freeze them.