The charges associated with carrying pets onboard - whether checked or in the cabin - add up quickly. Research airlines' different rates ahead of time and factor the canine and feline fees into the total cost of airfare - both yours and your pet's - before pressing book. Delta Air Lines for instance, attaches a hefty $200 fee per kennel to check a pet for one-way flights; cabin riders do less financial damage at $125 per kennel. And a good rule of thumb: like general airfare, discount airlines like Southwest ($75) and JetBlue ($100) often charge less for pets.
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