- Cheapest roundtrip flight
- from€320
- Fastest flight
- non-stop flights
- 95x / week
- Flight distance
- 1,647 km
- Time difference
- Most popular airlines
- United Airlines

- Alaska Airlines

- Southwest Airlines

- Delta Air Lines

- Frontier Airlines

- American Airlines

- United Airlines
Flight schedule from Denver (DEN) to Seattle-Tacoma (SEA)
Select a travel date in the flight schedule for the route from Denver (DEN) to Seattle-Tacoma (SEA) and compare affordable flight deals.
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Matching outbound flightsDEN–SEA · 45 of 45
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- Sep 27 – Oct 3, 2026
- October 4 – 10, 2026
- October 11 – 17, 2026
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Tips and tricks to help you find cheap flights from Denver to Seattle Tacoma
Important flight information
Frequently Asked Questions (FAQ)
How long is the flight from Denver to Seattle-Tacoma?
A nonstop flight from Denver to Seattle-Tacoma typically takes around 2 hours 59 minutes. If you choose a connecting flight, allow more travel time. Typical one-stop itineraries take around 8 hours 3 minutes. For the quickest trip, a nonstop flight is usually the most comfortable choice.
Are there nonstop flights from Denver to Seattle-Tacoma?
Yes, there are nonstop flights from Denver to Seattle-Tacoma, averaging around 13 to 14 flights per day, operated by, among others, United Airlines, Alaska Airlines and Southwest. If you want to fly without a layover, it is worth filtering specifically for nonstop flights when searching.
Which airlines fly from Denver to Seattle-Tacoma?
Direct flights from Denver to Seattle-Tacoma are operated by, among others, United Airlines, Alaska Airlines and Southwest. Connecting flights with one stop are also available, for example with Alaska Airlines (via San Diego, Portland-Oregon), American Airlines (via Los Angeles) and Sun Country Airlines (via Minneapolis). If travel time matters to you, a direct flight is usually the most convenient option. Connecting flights often give you more choice of departure times and airlines.
On which days are there nonstop flights from Denver to Seattle-Tacoma?
Nonstop flights from Denver to Seattle-Tacoma operate daily. The schedule may vary by season, so it is worth comparing several travel dates. If your preferred day does not have a nonstop flight, nearby departure days or short connecting flights may be a good alternative.
How many flights are there per day from Denver to Seattle-Tacoma?
From Denver to Seattle-Tacoma, there are on average around 13 to 14 flights per day. This usually means you have a good choice of departure times. If you are flexible, you can easily compare times, prices, and airlines.
How many flights per week are there from Denver to Seattle-Tacoma?
From Denver to Seattle-Tacoma, there are around 96 to 97 flights per week. This means you usually have connections available on several days and at various times. Beyond the price, it is worth comparing flight duration, airline, and any potential additional fees.
When does the first flight from Denver to Seattle-Tacoma depart?
The earliest nonstop flight from Denver to Seattle-Tacoma usually departs at 6:00 AM. The exact departure time may vary by day of the week and airline. Early flights are especially useful if you want to make the most of your arrival day in Seattle-Tacoma.
When does the last flight from Denver to Seattle-Tacoma depart?
The last nonstop flight from Denver to Seattle-Tacoma usually departs at 10:45 PM. Late flights can be convenient if you want to travel after work or in the evening. Do check whether it is a nonstop flight, as a connecting itinerary could push the arrival time significantly later.