Seattle to Denver Flights (SEA to DEN)
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Cheapest flight found
$64
Last updated Aug 22, 2026
Prices by Month
Price History
Tracking the Sep 15, 2026 departure — the cheapest date we found.
No price history yet. Check back after the next price check.
Price Behavior: SEA → DEN
Based on 7 months of fare data collected by Trip Manta.
Lowest Fare
$64
Highest Fare
$160
Median Fare
$79
Price Spread
$96
Prices vary significantly, so 24/7 tracking is especially valuable here.
Cheapest month to fly: September 2026 (from $64)
Most expensive month: August 2026 (from $160)
What This Means for You
Flights from Seattle to Denver range from $64 to $160, a $96 spread across the months we track. If your dates are flexible, September 2026 tends to have the lowest fares. Because prices on this route change significantly, setting up 24/7 tracking with instant alerts gives you the best chance of catching a short-lived drop before it corrects.
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From
Seattle (SEA)
To
Denver (DEN)
Airport Information
Seattle (SEA)
Seattle-Tacoma International Airport (SEA), also known as Sea-Tac, is the primary commercial airport serving the Seattle metropolitan area. It serves as a major hub for Alaska Airlines and Delta Air Lines, offering a wide range of amenities including local Pacific Northwest dining options, automated transit systems between terminals, and a significant collection of contemporary art. Located just south of downtown, it is easily accessible via the Link Light Rail.
Denver (DEN)
Denver International Airport (DEN) is one of the largest and busiest airports in the world, recognizable by its iconic tented roof structure that mimics the Rocky Mountains. As a major hub for United, Southwest, and Frontier, it provides efficient connections to the entire mountain region. Travelers can easily reach downtown Denver via the RTD A-Line commuter rail, which takes roughly 37 minutes and departs directly from the airport's transit center.
Frequently Asked Questions
What is the average flight time from Seattle to Denver?
The average non-stop flight duration is approximately 2 hours and 40 minutes, covering a distance of about 1,024 miles.
Which airlines offer non-stop flights between SEA and DEN?
Major carriers offering direct service include Alaska Airlines, United Airlines, Southwest Airlines, Delta Air Lines, and Frontier Airlines.
Is there a time difference between Seattle and Denver?
Yes, Denver is in the Mountain Time Zone (MST/MDT), which is one hour ahead of Seattle's Pacific Time Zone (PST/PDT).
How far is Denver International Airport from the city center?
The airport is located about 25 miles northeast of downtown Denver, which is roughly a 30 to 45-minute drive depending on traffic conditions.
What is the cheapest day of the week to fly this route?
Mid-week departures, particularly on Tuesdays and Wednesdays, are statistically the most affordable days to fly from Seattle to Denver.
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