The pet container must be no bigger than 18" x 14" x 8" and fit under the seat in front of you. Frontier charges $99 each way for traveling with a pet, plus additional fees for the pet carrier as ...

Many pet-friendly airlines will let you bring your dog, cat, bird, or other household critter along for the journey.

Small dogs and cats can fly on JetBlue for fee of $125 each way, in an approved carrier. Up to six pets are allowed on JetBlue flights. Frontier allows pets on board for a $99 fee each way ...