The cheapest times to fly from SEA to DEN are
- January 1st to March 4th (except the week of February 12th)
- April 16th to May 6th
- August 13th to November 18th
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SEA to DEN is late January and early February. Prices can be as high as $686 for Sunday flights during late July, or as low as $137 for Tuesday flights around late January and early February.
When to Fly to Denver
Flying from Seattle, WA (SEA) to Denver, CO (DEN) will usually cost between $140 to $289 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January and early February with an average ticket price of $150. Due to high demand the most expensive time to fly is late July, with an average price of $311. Planning your trip to low-cost times can easily save you $161 on economy flights and even more on first-class flights. Generally, any price below $179 can be considered a good price for a round-trip SEA to DEN flight.
See below for a graph of average weekly prices for the SEA to DEN route. All prices are for round-trip tickets in USD.
Compared to other flights, the SEA to DEN flight is much cheaper than the average and costs much less than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.11, which is far below average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $52 (24%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $165. Return trip prices are from the DEN to SEA flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from SEA to DEN can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 2 hour 49 minutes may be realistic.
Flight Questions Answered
Still have questions about flying from SEA to DEN? We’ve got answers.
Which airlines fly this route?
You can find 9 major airlines flying this route most often: Alaska, American, China Eastern, Delta, Frontier, Singapore Airlines, Southwest, Spirit, United, and potentially more during busy seasons.
How far away is it from Denver International Airport to Seattle/Tacoma International Airport?
The distance between the two airports is roughly 1022 miles or 1645 kilometers.
How long does it take to fly from SEA to DEN?
The real-world flight time for a nonstop SEA to DEN flight is about 2 hour 49 minutes.
How many flights go between Seattle, WA and Denver, CO?
It depends on the day of the week and the date, but a typical day might have around 68 available flights from SEA to DEN.
Airport Location Info
|Origination airport name||Seattle/Tacoma International Airport|
|Country||the United States|
|Destination airport name||Denver International Airport|
|Country||the United States|
Late and Early Flight Data
Flights from SEA to DEN tend to depart later than the average flight. According to our recently updated data, 35% of flights departed 5 or more minutes late, and 20% of flights left 5 or more minutes early. On average you can expect to leave DEN heading for SEA about 15 minutes late. This does significantly impact arrival time, as the average landing time in Denver, CO is about 13 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:
- Southwest: 10 minutes late
- Delta: 22 minutes late
- United: 15 minutes late
- Alaska: 9 minutes late
- Frontier: 31 minutes late
- Some airlines not reporting
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.