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4 of 5
Kinda Worth It:
First-Class Seats

But only if you're flying internationally, says Sara Keagle, a flight attendant for a major U.S. airline. "On domestic trips, we don't have enough time to make the kind of accommodations that count," says Keagle. "International flights, however, are a whole different ball game. Service and seats are bumped up—you get lie-flat seats, which can make or break how you feel when you land."