Seattle (SEA) to Denver (DEN) Flights: Expert Travel Guide
Cheapest flight found
$99
Last updated Mar 13, 2026
Prices by Month
Price History
Tracking the May 7, 2026 departure — the cheapest date we found.
Price Behavior: SEA → DEN
Based on 6 months of fare data collected by Trip Manta.
Lowest Fare
$99
Highest Fare
$208
Median Fare
$162
Price Spread
$109
Prices vary significantly — hourly tracking is especially valuable here.
Cheapest month to fly: May 2026 (from $99)
Most expensive month: July 2026 (from $208)
Biggest price drop caught: $110 between consecutive checks
Most frequent cheapest airline: Alaska
What This Means for You
Flights from Seattle to Denver range from $99 to $208, a $109 spread across the months we track. If your dates are flexible, May 2026 tends to have the lowest fares. Because prices on this route change significantly, setting up hourly price alerts gives you the best chance of catching a short-lived drop before it corrects. We have caught drops as large as $110 between hourly checks on this route.
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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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