- Cheapest roundtrip flight
- from€169
- Fastest flight
- non-stop flights
- 104x / 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 Seattle-Tacoma (SEA) to Denver (DEN)
Select a travel date in the flight schedule for the route from Seattle-Tacoma (SEA) to Denver (DEN) and compare affordable flight deals.
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Matching outbound flightsSEA–DEN · 49 of 49
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- September 20 – 26, 2026
- Sep 27 – Oct 3, 2026
- October 4 – 10, 2026
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- SEADENnonstop
- SEADENnonstop
- SEADENnonstop
- SEADENnonstop
- SEADENnonstop
- SEADEN1 stopover
- SEADENnonstop
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- SEADENnonstop
- SEADENnonstop
Tips and tricks to help you find cheap flights from Seattle Tacoma to Denver
Important flight information
Frequently Asked Questions (FAQ)
How long is the flight from Seattle-Tacoma to Denver?
A nonstop flight from Seattle-Tacoma to Denver typically takes around 2 hours 44 minutes. If you choose a connecting flight, allow more travel time. Typical one-stop itineraries take around 27 hours 34 minutes. For the quickest trip, a nonstop flight is usually the most comfortable choice.
Are there nonstop flights from Seattle-Tacoma to Denver?
Yes, there are nonstop flights from Seattle-Tacoma to Denver, averaging around 14 to 15 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 Seattle-Tacoma to Denver?
Direct flights from Seattle-Tacoma to Denver 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), Frontier Airlines (via Las Vegas) and American Airlines (via Phoenix - Sky Harbor). 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 Seattle-Tacoma to Denver?
Nonstop flights from Seattle-Tacoma to Denver 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 Seattle-Tacoma to Denver?
From Seattle-Tacoma to Denver, there are on average around 14 to 15 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 Seattle-Tacoma to Denver?
From Seattle-Tacoma to Denver, there are around 104 to 105 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 Seattle-Tacoma to Denver depart?
The earliest nonstop flight from Seattle-Tacoma to Denver usually departs at 5:00 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 Denver.
When does the last flight from Seattle-Tacoma to Denver depart?
The last nonstop flight from Seattle-Tacoma to Denver usually departs at 8:55 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.