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Cheap flights from Seattle to Denver from $73

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Denver departing on 10/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Frontier Logo
6:00 am - 9:51 amSEA-DEN
2h 51mnonstop
Frontier Logo
6:32 pm - 8:44 pmDEN-SEA
3h 12mnonstop
$120Frontier
Find Deal
Sat, Sep 13 - Sat, Sep 20
Frontier Logo
7:48 pm - 11:40 pmSEA-DEN
2h 52mnonstop
Frontier Logo
8:55 pm - 11:01 pmDEN-SEA
3h 06mnonstop
$121Frontier
Find Deal
Sun, Aug 17 - Tue, Aug 26
Delta Logo
7:10 am - 10:55 amSEA-DEN
2h 45mnonstop
Delta Logo
6:35 am - 8:29 amDEN-SEA
2h 54mnonstop
$157Delta
Find Deal
Wed, Aug 27 - Tue, Sep 2
Alaska Airlines Logo
4:40 pm - 8:27 pmSEA-DEN
2h 47mnonstop
Alaska Airlines Logo
9:23 pm - 11:21 pmDEN-SEA
2h 58mnonstop
$165Alaska Airlines
Find Deal
Wed, Aug 27 - Fri, Sep 5
Delta Logo
3:15 pm - 6:55 pmSEA-DEN
2h 40mnonstop
Delta Logo
12:20 pm - 2:31 pmDEN-SEA
3h 11mnonstop
$167Delta
Find Deal
Wed, Sep 17 - Sat, Oct 4
Alaska Airlines Logo
1:35 pm - 5:21 pmSEA-DEN
2h 46mnonstop
Alaska Airlines Logo
11:40 am - 3:33 pmDEN-SEA
4h 53m1 stop
$170Alaska Airlines
Find Deal
Thu, Aug 21 - Thu, Aug 28
Southwest Logo
4:10 pm - 10:55 pmSEA-DEN
5h 45m1 stop
Southwest Logo
7:00 pm - 8:55 pmDEN-SEA
2h 55mnonstop
$175Southwest
Find Deal
Thu, Sep 25 - Tue, Sep 30
Hawaiian Airlines Logo
8:17 pm - 11:59 pmSEA-DEN
2h 42mnonstop
Hawaiian Airlines Logo
9:23 pm - 11:21 pmDEN-SEA
2h 58mnonstop
$177Hawaiian Airlines
Find Deal
Sun, Aug 17 - Wed, Aug 20
Hawaiian Airlines Logo
8:02 am - 11:55 amSEA-DEN
2h 53mnonstop
Hawaiian Airlines Logo
6:43 pm - 11:01 pmDEN-SEA
5h 18m1 stop
$178Hawaiian Airlines
Find Deal
Sat, Oct 25 - Mon, Oct 27
Southwest Logo
11:10 pm - 8:45 amSEA-DEN
8h 35m2 stops
Southwest Logo
8:30 am - 10:25 amDEN-SEA
2h 55mnonstop
$180Southwest
Find Deal
Wed, Sep 3 - Tue, Sep 23

Frontier flights from Seattle to Denver

Our best Frontier deals on Seattle to Denver flight tickets
Frontier
Sep 13
SEA6:00 amSeattle/Tacoma Intl
2h 51m
DEN9:51 amDenver Intl
Sep 20
DEN6:32 pmDenver Intl
3h 12m
SEA8:44 pmSeattle/Tacoma Intl
Frontier
Aug 17
SEA7:48 pmSeattle/Tacoma Intl
2h 52m
DEN11:40 pmDenver Intl
Aug 26
DEN8:55 pmDenver Intl
3h 06m
SEA11:01 pmSeattle/Tacoma Intl
Frontier
Jul 22
SEA6:25 amSeattle/Tacoma Intl
2h 49m
DEN10:14 amDenver Intl
Jul 28
DEN10:29 pmDenver Intl
3h 05m
SEA12:34 amSeattle/Tacoma Intl

American Airlines flights from Seattle to Denver

Our best American Airlines deals on Seattle to Denver flight tickets
American Airlines
Sep 16
SEA6:11 amSeattle/Tacoma Intl
7h 16m
1 stop
DEN2:27 pmDenver Intl
Sep 23
DEN3:07 pmDenver Intl
7h 01m
1 stop
SEA9:08 pmSeattle/Tacoma Intl
American Airlines
Aug 14
SEA3:15 pmSeattle/Tacoma Intl
5h 52m
1 stop
DEN10:07 pmDenver Intl
Aug 20
DEN7:18 amDenver Intl
8h 25m
1 stop
SEA2:43 pmSeattle/Tacoma Intl
American Airlines
Aug 14
SEA7:45 amSeattle/Tacoma Intl
8h 44m
1 stop
DEN5:29 pmDenver Intl
Aug 18
DEN6:00 amDenver Intl
9h 01m
1 stop
SEA2:01 pmSeattle/Tacoma Intl

See travel insights to Denver from

How to get the cheapest flight ticket from Seattle to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Seattle is in October. Flight prices, which tend to average around $161, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in October, then you should wait until September to fly from Seattle, when ticket prices are also cheap, with an average price of $165.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Saturday when prices can be found for as low as $268. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Monday, with ticket prices averaging around $335.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $210. Flights in the morning are often more expensive with an average ticket price of $332.

What is the cheapest Seattle/Tacoma Intl to Denver Intl flight route?

Fly from Seattle/Tacoma Intl to Denver Intl for the best Seattle/Tacoma Intl - Denver Intl flight prices

How far in advance should I book a flight to Denver?

You are more likely to see cheaper flights to Denver from Seattle when booking 12 weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $205 when searching 12 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Seattle for as low as $168 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Denver Intl flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to Denver flight prices changed over time?

As of June 2025, prices for Seattle to Denver flights are approximately 32% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Denver according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Denver (SEA to DEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Denver

Best Price Found

$73

Fastest flight time

2h 35m

Direct flights

Every day

Airports in Denver

1 airport
The best one-way flight to Denver from Seattle in the past 72 hours is $73. The best round-trip flight deal from Seattle to Denver found on momondo in the last 72 hours is $120.
The fastest flight from Seattle to Denver takes 2h 35m
Direct flights go from Seattle to Denver every day.
There is 1 airport near Denver: Denver Intl (DEN)

  • How far is Seattle/Tacoma Intl to Denver Intl by plane?

    A flight from Seattle/Tacoma Intl to Denver Intl will travel around 1019.6 mi. Flights usually cover this in 2h 35m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Denver Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Denver Intl Airport.

  • What documentation or ID do you need to fly to Denver Intl Airport?

    The necessary travel and health documents for your Denver Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Denver?

  • What is the most popular airline from Seattle to Denver?


Best airlines flying from Seattle to Denver

Compare and see reviews for airlines that fly from Seattle to Denver with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $57Free CancellationRating
5.9
3,296 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $98Free CancellationRating
7.8
2,501 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $108Free CancellationRating
8.0
7,963 reviews
Search Delta flights
SouthwestPriceFrom $121Free CancellationRating
8.0
4,278 reviews
Search Southwest flights
United AirlinesPriceFrom $148Free CancellationRating
7.4
8,801 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $161Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
  • Delta Flights From Seattle to Denver

    Delta operates around 15 flights from Seattle to Denver every week. The average price of these flights found in the last 72 hours has been $245, but momondo users have found Delta deals from Seattle to Denver from as low as $108 round-trip. Delta has been scored 8.0/10 in 7,963 reviews.

  • Southwest Flights From Seattle to Denver

    Across 4,278 Southwest reviews on momondo, the average score is 8.0/10. Southwest flies from Seattle to Denver about 34 times each week, with ticket deals ranging from $121 to $244. Price data is based on momondo searches in the last 72 hours.


Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Estes Park
Breckenridge
Black Hawk
Aurora
Fort Collins
Keystone
Cripple Creek
Longmont
Lakewood
Boulder
Manitou Springs
Westminster
Greeley
Thornton
Winter Park
Silverthorne
Copper Mountain
Golden
Frisco
Grand Lake

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Denver?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Denver for you.

Can I find flights from Seattle to Denver with flexible booking policies on momondo?

Flights from Seattle to Denver with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Denver?

momondo provides multiple filters to help you find the best flight to Denver from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Denver right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Denver flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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1 adult
Sat 6/21
Sat 6/28

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