Southwest has round-trip flights from Seattle (SEA) to Denver (DEN) for $98, NONSTOP. $49 each-way. Flights December to March. Weekends available. No Holidays. Origin/Destination reversible.
Note: You can save up to an additional $100 if you purchase your Flight+Hotel together as a package on Southwest Vacations and use the HOLIDAYDOM coupon code. Before you commit, always compare the prices of the individual Flights and Hotel with other hotel booking sites like Hotels.com or Tripadvisor.
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