Cheap flights from Seattle to Key West from CA $350

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards

Cheap flights from Seattle (SEA) to Key West (EYW)

Prices were available within the past 7 days and start at CA $350 for one-way flights and CA $439 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
American Airlines
American Airlines
Delta
Delta
American Airlines
*Available to Expedia members.