$23 Flights from Seattle (SEAA) to Denver (DENA)

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Flight deals from Seattle to Denver

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to Denver? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Seattle to Denver from $23 one-way

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Denver flights are currently cheapest in April.

Direct flights from Seattle to Denver

Seattle to Denver: Flight information

The things to know before you go.
Cheapest flight found$23
Cheapest month to flyApril
Average flight time2 hrs, 47 mins
Most popular airlineSouthwest Airlines
Average flights per week297

Finding cheap flights from Seattle to Denver: Frequently asked questions

There are 4 airports in Denver: Denver Arapahoe Co, Broomfield, Denver International, and Northern Colorado Regional.
The best price we found for a round-trip flight from Seattle to Denver is $49. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 47 minutes is the average flight time from Seattle to Denver.
Southwest Airlines, Alaska Airlines and United fly direct from Seattle to Denver.
There are 297 flights per week flying from Seattle to Denver, as of February 2026.
The cheapest month to fly from Seattle to Denver is usually April.
If you're flying from Seattle, the cheapest airport near Denver is Denver International – which is 18.6 miles away from the center of Denver. We've found flights to this airport from $49.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Denver on Wednesday, April 15, 2026.
Yes – the average flight time is 2 hours and 47 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 33°F. July is typically the warmest month in Denver, when it usually averages around 87°F. You can expect the least rain in January. The coldest month is December, with temperatures averaging 21°F. The rainiest month is July.
The cheapest airline that flies to Denver is Frontier Airlines.

Flying from Seattle to Denver: what you need to know

  • Get your travels underway at Seattle-Tacoma International Airport (SEA), the main airport in Seattle. Explore flights from Seattle to Denver that fly out of this base.

  • When it comes to where you'll touch down, Denver's major arrival point is Denver International Airport (DEN).

  • Around 2 hours 45 minutes is how long you'll be traveling on a direct Seattle to Denver flight.

  • Denver is one hour ahead of Seattle and observes the UTC-6 timezone.

  • Seattle-Tacoma International Airport (SEA) to Denver International Airport (DEN) is the most traveled route that connects these two cities. There are 114 weekly flights to choose from. If you have things to finalize before heading off, the last flight from Seattle to Denver is with Southwest Airlines at 21:00. Go for the first SEA to DEN departure operated by United Airlines at 05:00 to fit in more activities on your first day in Denver.

  • For a stress-free start to your trip, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to board your Seattle to Denver flight.

  • You can expect longer lines during popular months like July. Arriving up to four hours ahead of international flights and two hours for a domestic departure is a good idea.

How to find the cheapest flights from Seattle to Denver

  • To score cheap Seattle to Denver flights, reserve your trip two months ahead of your departure date.

  • May is the best month for scoring an amazing deal on a plane ticket from Seattle to Denver. If you're looking to travel at a different time of year, the 'Whole month' tool will show you the lowest prices for each month.

  • There's no need to search every day to find out if fares have dropped when you set up a Price Alert. We'll tell you as soon as a better deal comes up on cheap flights from Seattle to Denver.

  • Select your ideal departure and arrival times, airlines and number of stops by using the filters. Alternatively, sort your Seattle to Denver flight results by 'Fastest,' 'Best' or 'Cheapest.'

Flying from Seattle

Seattle-Tacoma International Airport (SEA)

  • If you're searching for a direct flight from Seattle to Denver, you can leave from Seattle-Tacoma International Airport (SEA). Fly from SEA to Denver International Airport (DEN) without any stops.

  • There are numerous airlines that offer direct Seattle to Denver plane tickets out of SEA. Some of the most popular are:

  • The journey from central Seattle to SEA takes around 55 minutes by public transport. If you drive, ride-share or take a cab, you'll cover the 11 miles in 20 minutes or so, depending on traffic conditions.

  • After a stress-free start to your travels? Stay near Seattle-Tacoma International Airport. Whether you've booked an early flight from Seattle to Denver or just don't want to be rushed, these hotels have you covered:

  • Seattle-Tacoma International Airport maintains a strong on-time performance, making delays less likely. Departures from SEA land at their destination as scheduled 81.27% of the time.

Arriving in Denver

Denver International Airport (DEN)

  • Denver International Airport (DEN) to central Denver takes about 35 minutes by car. The center is roughly 18 miles away.

  • Getting there by public transport typically takes 1 hour 30 minutes.

  • Once your flight from Seattle to Denver has touched down, kick back at a hotel close by. The Westin Denver International Airport is a great option just a short drive from DEN.

  • Explore without limits with a Denver International Airport rental car. Pick up a set of wheels from Routes Car Rentals, Dollar or Budget and see more of Denver and beyond.

  • To get the best deal, reserve your vehicle from Denver International Airport around one week in advance of your Seattle to Denver flight.

  • The address for DEN is 8500 Pena Boulevard.

Best time to go to Denver

  • April is the quietest month for flights from Seattle to Denver, while July is the most popular. Figure out the ideal time to go to Denver based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • The warmest month in Denver is July, with temperatures ranging between 57ºF and 90ºF. Lock in your Seattle to Denver ticket then if that's your idea of comfortable weather.

  • If you like traveling in cooler conditions, look for a cheap flight from Seattle to Denver in January when temperatures average between 16ºF and 45ºF.

More about Denver

Explore more of United States

  • You've seen Denver, now it's time to discover more of United States. Journey about 65 miles south to Colorado Springs to check off its top sights. From US Northern Command (USNORTHCOM) / North American Aerospace Defense Command (NORAD) Headquarters to Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA), there's plenty to keep you busy.

  • Around 8 miles east of Denver, Aurora is another essential stop in United States. Start your sightseeing at Magellan's Travel Solutions and Gear, The Fairways at Lowry and Retired Enlisted Association Inc.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.