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Cheap flights from Seattle to Denver from C$ 72

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 25/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Frontier Logo
6:00 a.m. - 9:51 a.m.SEA-DEN
2h 51mdirect
Frontier Logo
10:29 p.m. - 12:31 a.m.DEN-SEA
3h 02mdirect
C$ 121Frontier
Find Deal
Sat, 25 Oct - Mon, 27 Oct
Frontier Logo
6:00 a.m. - 9:51 a.m.SEA-DEN
2h 51mdirect
Frontier Logo
10:29 p.m. - 12:31 a.m.DEN-SEA
3h 02mdirect
C$ 123Frontier
Find Deal
Sat, 25 Oct - Mon, 27 Oct
Frontier Logo
6:00 a.m. - 9:51 a.m.SEA-DEN
2h 51mdirect
Frontier Logo
10:29 p.m. - 12:31 a.m.DEN-SEA
3h 02mdirect
C$ 139Frontier
Find Deal
Fri, 17 Oct - Sun, 19 Oct
Delta Logo
7:10 a.m. - 10:55 a.m.SEA-DEN
2h 45mdirect
Delta Logo
7:59 p.m. - 10:05 p.m.DEN-SEA
3h 06mdirect
C$ 217Delta
Find Deal
Sat, 30 Aug - Tue, 2 Sep
Southwest Logo
5:15 a.m. - 8:50 a.m.SEA-DEN
2h 35mdirect
Southwest Logo
10:25 p.m. - 12:20 a.m.DEN-SEA
2h 55mdirect
C$ 228Southwest
Find Deal
Wed, 10 Sep - Sun, 14 Sep
Alaska Airlines Logo
6:00 p.m. - 9:47 p.m.SEA-DEN
2h 47mdirect
Alaska Airlines Logo
8:00 a.m. - 10:03 a.m.DEN-SEA
3h 03mdirect
C$ 239Alaska Airlines
Find Deal
Fri, 29 Aug - Sun, 31 Aug
Southwest Logo
4:30 p.m. - 8:05 p.m.SEA-DEN
2h 35mdirect
Southwest Logo
10:20 a.m. - 3:45 p.m.DEN-SEA
6h 25m1 stop
C$ 241Southwest
Find Deal
Sat, 25 Oct - Mon, 27 Oct
Alaska Airlines Logo
5:20 a.m. - 10:44 a.m.SEA-DEN
4h 24m1 stop
Alaska Airlines Logo
11:40 a.m. - 5:50 p.m.DEN-SEA
7h 10m1 stop
C$ 243Alaska Airlines
Find Deal
Tue, 16 Sep - Tue, 23 Sep
United Airlines Logo
6:55 p.m. - 10:36 p.m.SEA-DEN
2h 41mdirect
United Airlines Logo
6:00 a.m. - 11:56 a.m.DEN-SEA
6h 56m1 stop
C$ 250United Airlines
Find Deal
Mon, 29 Sep - Sat, 4 Oct
Delta Logo
6:00 p.m. - 9:44 p.m.SEA-DEN
2h 44mdirect
Delta Logo
7:59 p.m. - 10:05 p.m.DEN-SEA
3h 06mdirect
C$ 255Delta
Find Deal
Fri, 22 Aug - Wed, 27 Aug

Frontier flights from Seattle to Denver

Our best Frontier deals on Seattle to Denver flight tickets
Frontier
25 Oct
SEA6:00 a.m.Seattle/Tacoma Intl
2h 51m
DEN9:51 a.m.Denver Intl
27 Oct
DEN10:29 p.m.Denver Intl
3h 02m
SEA12:31 a.m.Seattle/Tacoma Intl
C$ 121
Find similar
Frontier
25 Oct
SEA6:00 a.m.Seattle/Tacoma Intl
2h 51m
DEN9:51 a.m.Denver Intl
27 Oct
DEN10:29 p.m.Denver Intl
3h 02m
SEA12:31 a.m.Seattle/Tacoma Intl
C$ 123
Find similar
Frontier
17 Oct
SEA6:00 a.m.Seattle/Tacoma Intl
2h 51m
DEN9:51 a.m.Denver Intl
19 Oct
DEN10:29 p.m.Denver Intl
3h 02m
SEA12:31 a.m.Seattle/Tacoma Intl
C$ 139
Find similar

Delta flights from Seattle to Denver

Our best Delta deals on Seattle to Denver flight tickets
Delta
30 Aug
SEA7:10 a.m.Seattle/Tacoma Intl
2h 45m
DEN10:55 a.m.Denver Intl
2 Sep
DEN7:59 p.m.Denver Intl
3h 06m
SEA10:05 p.m.Seattle/Tacoma Intl
C$ 217
Find similar
Delta
22 Aug
SEA6:00 p.m.Seattle/Tacoma Intl
2h 44m
DEN9:44 p.m.Denver Intl
27 Aug
DEN7:59 p.m.Denver Intl
3h 06m
SEA10:05 p.m.Seattle/Tacoma Intl
C$ 255
Find similar
Delta
29 Aug
SEA7:10 a.m.Seattle/Tacoma Intl
2h 45m
DEN10:55 a.m.Denver Intl
1 Sep
DEN6:50 a.m.Denver Intl
2h 54m
SEA8:44 a.m.Seattle/Tacoma Intl
C$ 283
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 96,600 searches. Data last updated 31 July 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

Sat 25/10

6:00 a.m.-9:51 a.m.

Nonstop2h 51m

Denver Intl

Mon 27/10

10:29 p.m.-12:31 a.m.

Nonstop3h 02m

C$ 121

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 25/10

6:00 a.m.-9:51 a.m.

Nonstop2h 51m

Denver Intl

Mon 27/10

10:29 p.m.-12:31 a.m.

Nonstop3h 02m

C$ 123

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 17/10

6:00 a.m.-9:51 a.m.

Nonstop2h 51m

Denver Intl

Sun 19/10

10:29 p.m.-12:31 a.m.

Nonstop3h 02m

C$ 139

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 30/8

7:10 a.m.-10:55 a.m.

Nonstop2h 45m

Denver Intl

Tue 2/9

7:59 p.m.-10:05 p.m.

Nonstop3h 06m

C$ 217

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 10/9

5:15 a.m.-8:50 a.m.

Nonstop2h 35m

Denver Intl

Sun 14/9

10:25 p.m.-12:20 a.m.

Nonstop2h 55m

C$ 228

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 29/8

6:00 p.m.-9:47 p.m.

Nonstop2h 47m

Denver Intl

Sun 31/8

8:00 a.m.-10:03 a.m.

Nonstop3h 03m

C$ 239

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 25/10

4:30 p.m.-8:05 p.m.

Nonstop2h 35m

Denver Intl

Mon 27/10

10:20 a.m.-3:45 p.m.

1 stop6h 25m

C$ 241

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 16/9

5:20 a.m.-10:44 a.m.

1 stop4h 24m

Denver Intl

Tue 23/9

11:40 a.m.-5:50 p.m.

1 stop7h 10m

C$ 243

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 29/9

6:55 p.m.-10:36 p.m.

Nonstop2h 41m

Denver Intl

Sat 4/10

6:00 a.m.-11:56 a.m.

1 stop6h 56m

C$ 250

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 22/8

6:00 p.m.-9:44 p.m.

Nonstop2h 44m

Denver Intl

Wed 27/8

7:59 p.m.-10:05 p.m.

Nonstop3h 06m

C$ 255

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

In general, October is the cheapest month to fly from Seattle to Denver. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 226. If you aren’t able to travel during the month of October, then book flights to Denver from Seattle during September instead. Flights to Denver in September, while not as cheap as those in October, still average around C$ 230.

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

The cheapest day to depart from Seattle to Denver is on a Monday. Travellers who choose to depart for Denver on a Monday will often find tickets for as low as C$ 277. On the other hand, Wednesday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 321.

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

Our most recent data shows that the best time of day to fly to Denver is in the evening. Flights from Seattle to Denver during this time can be as low as C$ 234. Try not to purchase tickets in the morning because they tend to be around C$ 376. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 C$ 285 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 C$ 237 on momondo.

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

There are 3 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 July 2025, prices for Seattle to Denver flights are approximately 4% 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

C$ 72

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 C$ 72. The best round-trip flight deal from Seattle to Denver found on momondo in the last 72 hours is C$ 121.
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 1640.8 km. By plane, this route typically takes 2h 35m.

  • 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 are updated 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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 C$ 73Free CancellationRating
5.9
3,238 reviews
Search Frontier flights
DeltaPriceFrom C$ 108Free CancellationRating
8.0
7,980 reviews
Search Delta flights
SouthwestPriceFrom C$ 193Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
Alaska AirlinesPriceFrom C$ 202Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 219Free CancellationRating
7.4
8,902 reviews
Search United Airlines flights

  • Delta Flights From Seattle to Denver

    Delta flies from Seattle to Denver around 13 times per week, with 7,980 momondo users rating the airline 8.0/10. The cheapest Delta deal from Seattle to Denver in the last 72 hours was C$ 78 (round-trip), much lower than the average airfare cost of C$ 172 for Delta flights on this route.

  • Southwest Flights From Seattle to Denver

    Southwest (8.0/10 from 4,244 reviews) operates around 17 flights from Seattle to Denver in any given week. The average Southwest airfare for this route is around C$ 197, with deals from around C$ 140 rare but found on momondo. Referenced prices are for round-trip Seattle to Denver flight searches in the last 72 hours.

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Silverthorne
Wheat Ridge
Winter Park
Westminster
Lakewood
Longmont
Fort Collins
Boulder
Littleton
Englewood
Frisco

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?

All flight searches from Seattle to Denver on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Seattle to Denver flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Seattle to Denver now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Denver and let you know when they change.

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.
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