Round Trip Denver to Seattle Nonstop Airfares on Delta, Southwest, Alaska or United Airlines

No special codes or coupons are required. Get these nonstop round trip airfares while supplies last.

Important Notes:

• These are basic economy fares.
• Baggage allowances vary by airline:
  • United: Personal item may be included.
  • Alaska, Southwest, Delta: Personal item and carry-on bag may be included.

Travel Availability: Departs DEN: Oct 1-7, 10-31; Nov 1-18, 22-23, 26-27; Dec 1-17, 21, 24-25, 31; Jan 5-30; Feb 1-20, 22-28; March 1-10 Departs SEA: Oct 1-14, 16-31; Nov 1-19, 22-23, 26-27; Dec 1-17, 21, 23-25, 29-31; Jan 1, 5-30; Feb 1-10, 13, 15-28; March 1-10