Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Denver from $67

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 1/6. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Denver

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:43 pm - 12:35 amSEA-DEN
2h 52mnonstop
Frontier Logo
5:30 am - 7:33 amDEN-SEA
3h 03mnonstop
$101Frontier
Find Deal
Fri, Oct 24 - Sun, Oct 26
Frontier Logo
7:05 pm - 10:56 pmSEA-DEN
2h 51mnonstop
Frontier Logo
6:00 am - 7:51 pmDEN-SEA
14h 51m1 stop
$102Frontier
Find Deal
Fri, Dec 12 - Mon, Dec 15
Delta Logo
7:30 pm - 11:14 pmSEA-DEN
2h 44mnonstop
Delta Logo
12:21 pm - 2:23 pmDEN-SEA
3h 02mnonstop
$107Delta
Find Deal
Fri, Nov 7 - Sat, Nov 8
Delta Logo
7:30 pm - 11:14 pmSEA-DEN
2h 44mnonstop
Delta Logo
6:05 am - 8:13 amDEN-SEA
3h 08mnonstop
$108Delta
Find Deal
Thu, Nov 6 - Sun, Nov 9
Alaska Airlines Logo
2:06 pm - 5:50 pmSEA-DEN
2h 44mnonstop
Alaska Airlines Logo
8:02 pm - 10:13 pmDEN-SEA
3h 11mnonstop
$117Alaska Airlines
Find Deal
Mon, Nov 3 - Mon, Nov 3
United Airlines Logo
12:41 pm - 9:55 pmSEA-DEN
8h 14m1 stop
United Airlines Logo
9:05 pm - 11:10 pmDEN-SEA
3h 05mnonstop
$119United Airlines
Find Deal
Sun, Nov 2 - Fri, Nov 7
Alaska Airlines Logo
8:37 am - 12:27 pmSEA-DEN
2h 50mnonstop
Alaska Airlines Logo
11:41 am - 3:47 pmDEN-SEA
5h 06m1 stop
$120Alaska Airlines
Find Deal
Wed, Nov 19 - Thu, Dec 4
Southwest Logo
9:25 am - 6:00 pmSEA-DEN
7h 35m2 stops
Southwest Logo
2:50 pm - 4:50 pmDEN-SEA
3h 00mnonstop
$138Southwest
Find Deal
Wed, Nov 12 - Sat, Nov 15
Southwest Logo
12:40 pm - 10:45 pmSEA-DEN
9h 05m2 stops
Southwest Logo
4:40 pm - 6:40 pmDEN-SEA
3h 00mnonstop
$148Southwest
Find Deal
Thu, Nov 13 - Tue, Nov 18
United Airlines Logo
5:05 am - 8:49 amSEA-DEN
2h 44mnonstop
United Airlines Logo
5:00 am - 12:38 pmDEN-SEA
8h 38m1 stop
$153United Airlines
Find Deal
Thu, Oct 30 - Sun, Nov 2

Alaska Airlines flights from Seattle to Denver

Our best Alaska Airlines deals on Seattle to Denver flight tickets
Alaska Airlines
Nov 3
SEA2:06 pmSeattle/Tacoma Intl
2h 44m
DEN5:50 pmDenver Intl
Nov 3
DEN8:02 pmDenver Intl
3h 11m
SEA10:13 pmSeattle/Tacoma Intl
$117
Find similar
Alaska Airlines
Nov 19
SEA8:37 amSeattle/Tacoma Intl
2h 50m
DEN12:27 pmDenver Intl
Dec 4
DEN11:41 amDenver Intl
5h 06m
1 stop
SEA3:47 pmSeattle/Tacoma Intl
$120
Find similar
Alaska Airlines
Nov 3
SEA9:35 amSeattle/Tacoma Intl
7h 48m
1 stop
DEN6:23 pmDenver Intl
Nov 3
DEN8:02 pmDenver Intl
3h 11m
SEA10:13 pmSeattle/Tacoma Intl
$127
Find similar

Frontier flights from Seattle to Denver

Our best Frontier deals on Seattle to Denver flight tickets
Frontier
Oct 24
SEA8:43 pmSeattle/Tacoma Intl
2h 52m
DEN12:35 amDenver Intl
Oct 26
DEN5:30 amDenver Intl
3h 03m
SEA7:33 amSeattle/Tacoma Intl
$101
Find similar
Frontier
Dec 12
SEA7:05 pmSeattle/Tacoma Intl
2h 51m
DEN10:56 pmDenver Intl
Dec 15
DEN6:00 amDenver Intl
14h 51m
1 stop
SEA7:51 pmSeattle/Tacoma Intl
$102
Find similar
Frontier
Nov 1
SEA12:58 pmSeattle/Tacoma Intl
2h 59m
DEN4:57 pmDenver Intl
Nov 2
DEN9:48 amDenver Intl
26h 07m
1 stop
SEA10:55 amSeattle/Tacoma Intl
$103
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 9, 2025.
Use the filters below to find and compare flights from Seattle to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 10/24

8:43 pm-12:35 am

Nonstop2h 52m

Denver Intl

Sun 10/26

5:30 am-7:33 am

Nonstop3h 03m

$101

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 12/12

7:05 pm-10:56 pm

Nonstop2h 51m

Denver Intl

Mon 12/15

6:00 am-7:51 pm

1 stop14h 51m

$102

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 11/7

7:30 pm-11:14 pm

Nonstop2h 44m

Denver Intl

Sat 11/8

12:21 pm-2:23 pm

Nonstop3h 02m

$107

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 11/6

7:30 pm-11:14 pm

Nonstop2h 44m

Denver Intl

Sun 11/9

6:05 am-8:13 am

Nonstop3h 08m

$108

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 11/3

2:06 pm-5:50 pm

Nonstop2h 44m

Denver Intl

Mon 11/3

8:02 pm-10:13 pm

Nonstop3h 11m

$117

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 11/2

12:41 pm-9:55 pm

1 stop8h 14m

Denver Intl

Fri 11/7

9:05 pm-11:10 pm

Nonstop3h 05m

$119

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 11/19

8:37 am-12:27 pm

Nonstop2h 50m

Denver Intl

Thu 12/4

11:41 am-3:47 pm

1 stop5h 06m

$120

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 11/12

9:25 am-6:00 pm

2 stops7h 35m

Denver Intl

Sat 11/15

2:50 pm-4:50 pm

Nonstop3h 00m

$138

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 11/13

12:40 pm-10:45 pm

2 stops9h 05m

Denver Intl

Tue 11/18

4:40 pm-6:40 pm

Nonstop3h 00m

$148

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 10/30

5:05 am-8:49 am

Nonstop2h 44m

Denver Intl

Sun 11/2

5:00 am-12:38 pm

1 stop8h 38m

$153

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $183, 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 January to fly from Seattle, when ticket prices are also cheap, with an average price of $188.

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 Friday when prices can be found for as low as $279. 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 $344.

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 $244. Flights in the morning are often more expensive with an average ticket price of $329.

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 weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $215 when searching 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 $185 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 October 2025, prices for Seattle to Denver flights are approximately 38% more expensive 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

$133

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 $133. The best round-trip flight deal from Seattle to Denver found on momondo in the last 72 hours is $197.
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)
Search flight deals

  • 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 41m, 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 $71Free CancellationRating
5.8
3,143 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $87Free CancellationRating
7.8
2,775 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $119Free CancellationRating
7.9
7,970 reviews
Search Delta flights
SouthwestPriceFrom $122Free CancellationRating
8.0
4,236 reviews
Search Southwest flights
United AirlinesPriceFrom $156Free CancellationRating
7.4
8,966 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $173Free CancellationRating
8.0
11,049 reviews
Search Alaska Airlines flights

  • Southwest Flights From Seattle to Denver

    Southwest operates around 21 flights from Seattle to Denver every week. The average price of these flights found in the last 72 hours has been $255, but momondo users have found Southwest deals from Seattle to Denver from as low as $122 round-trip. Southwest has been scored 8.0/10 in 4,236 reviews.

  • Alaska Airlines Flights From Seattle to Denver

    Across 11,049 Alaska Airlines reviews on momondo, the average score is 8.0/10. Alaska Airlines flies from Seattle to Denver about 12 times each week, with ticket deals ranging from $173 to $303. 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
Breckenridge
Estes Park
Black Hawk
Aurora
Fort Collins
Keystone
Cripple Creek
Boulder
Manitou Springs
Longmont
Lakewood
Greeley
Thornton
Westminster
Winter Park
Copper Mountain
Frisco
Grand Lake
Silverthorne
Central City

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.

An easier way to manage your Denver trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/8
Sat 11/15
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States