Cheap Alaska Airlines flights Seattle (SEA) to Denver (DEN)

Finding cheap one-way Alaska Airlines flights from SEA to DEN on Expedia is simple — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly round-trip fares for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the least expensive months to jet away to Denver with Alaska Airlines. You could also find great deals on one-way and return fares in November.

To find cheap Alaska Airlines fares from Seattle - Tacoma Intl. Airport (SEA) to Denver Intl. Airport (DEN), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact what you pay. Sunday is typically the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Alaska Airlines offers direct flights from Seattle - Tacoma Intl. Airport (SEA) to Denver Intl. Airport (DEN), with 19 departures each week. Simply select the “Nonstop” and “Airline” filters while searching on Expedia to find all direct Alaska Airlines flights to DEN.

Depart Seattle - Tacoma Intl. Airport (SEA) for Denver Intl. Airport (DEN) on a direct Alaska Airlines flight, and you’ll be in the skies for about 2h 43m.

Sunday has the most Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Denver Intl. Airport (DEN). With 3 daily departures, this is a great day to book something that will suit your plans.

Departing SEA at 7:25AM UTC-8, the first Alaska Airlines flight to DEN lands at 11:07AM UTC-7. Traveling early means you’re less likely to encounter cancellations or delays.* Not a morning person? The last Alaska Airlines flight from SEA to DEN departs at 7:38PM UTC-8 and touches down at 11:15PM UTC-7.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Denver touch down at Denver Intl. Airport (DEN). This is the main gateway here.

Alaska Airlines makes flying from SEA to DEN more enjoyable with an excellent in-flight experience and top-tier customer service. You may even earn points with Mileage Plan. Remember to join Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely board a Boeing 737-900 or a Boeing 737 MAX 9 when flying Alaska Airlines from Seattle - Tacoma Intl. Airport (SEA) to Denver Intl. Airport (DEN). However, keep in mind that a different plane may be assigned depending on operational factors.

Changes are typically free within 24 hours of making a booking, but your airline may charge a fee after that time. For more information about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to make changes without being charged, tick the “Changes included” or “No cancel fee” filter when organizing your next break.