The cheapest times to fly from DEN to SEA are
- January 8th to March 11th
- April 23rd to May 6th
- August 13th to November 18th
- early December
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 DEN to SEA is late October. Prices can be as high as $638 for Sunday flights during late July, or as low as $137 for Tuesday flights around late October.
When to Fly to Seattle
Flying from Denver, CO (DEN) to Seattle, WA (SEA) will usually cost between $141 to $287 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October 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 $315. Planning your trip to low-cost times can easily save you $165 on economy flights and even more on first-class flights. Generally, any price below $180 can be considered a good price for a round-trip DEN to SEA flight.
See below for a graph of average weekly prices for the DEN to SEA route. All prices are for round-trip tickets in USD.
Compared to other flights, the DEN to SEA flight is much cheaper than the average and costs much less than the average flight leaving from Denver. 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 SEA to DEN 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 DEN to SEA 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 DEN to SEA? 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 Seattle/Tacoma International Airport to Denver International Airport?
The distance between the two airports is roughly 1022 miles or 1645 kilometers.
How long does it take to fly from DEN to SEA?
The real-world flight time for a nonstop DEN to SEA flight is about 2 hour 49 minutes.
How many flights go between Denver, CO and Seattle, WA?
It depends on the day of the week and the date, but a typical day might have around 62 available flights from DEN to SEA.
Airport Location Info
|Origination airport name||Denver International Airport|
|Country||the United States|
|Destination airport name||Seattle/Tacoma International Airport|
|Country||the United States|
Late and Early Flight Data
Flights from DEN to SEA tend to depart later than the average flight. According to our recently updated data, 37% of flights departed 5 or more minutes late, and 15% of flights left 5 or more minutes early. On average you can expect to leave SEA heading for DEN about 16 minutes late. This does significantly impact arrival time, as the average landing time in Seattle, WA is about 11 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:
- Southwest: 16 minutes late
- Delta: 19 minutes late
- United: 17 minutes late
- Alaska: 11 minutes late
- Frontier: 27 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.