Southwest® flights from Denver to Seattle/Tacoma from $119
Low fares from Denver to Seattle/Tacoma
$
Denver (DEN)to
Seattle/Tacoma (SEA)
Depart: 06/08/2026
One-way
Basic
From
$119
Seen: 9 hrs ago
Denver (DEN)to
Seattle/Tacoma (SEA)
Depart: 06/09/2026
One-way
Basic
From
$124
Seen: 5 hrs ago
Denver (DEN)to
Seattle/Tacoma (SEA)
Depart: 06/03/2026
One-way
Basic
From
$129
Seen: 11 hrs ago
Denver (DEN)to
Seattle/Tacoma (SEA)
Depart: 06/02/2026
One-way
Basic
From
$129
Seen: 8 hrs ago
Denver (DEN)to
Seattle/Tacoma (SEA)
Depart: 05/15/2026
One-way
Basic
From
$129
Seen: 5 hrs ago
Denver (DEN)to
Seattle/Tacoma (SEA)
Depart: 05/16/2026
One-way
Basic
From
$134
Seen: 8 hrs ago
Flight Details
Departing from:
Denver International Airport
Arriving at:
Seattle/Tacoma International Airport
Average flight time:
2 hours 58 minutes
Distance:
1024 miles
Route Information
155† Weekly flights
- 4‡ Nonstop flights per day Monday through Friday
- 3‡ Nonstop flights on Saturday
- 3‡ Nonstop flights on Sunday
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
The average flight time from Denver to Seattle/Tacoma is 2 hours 58 minutes.
There are 155 weekly flights from Denver to Seattle/Tacoma on Southwest Airlines.
Yes, Southwest flies nonstop from Denver to Seattle/Tacoma 4 times per day from Monday through Friday.
Yes, Southwest flies nonstop from Denver to Seattle/Tacoma 3 times per day on Saturdays and Sundays.
To find the lowest fares by day and time to fly Denver to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
You can rent a car at Seattle/Tacoma International Airport book yours with your flight.
Yes! Flights from Denver to Seattle/Tacoma—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.
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