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Cheap flights from Seattle to Denver from C$ 105

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 13/3. 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

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Find the cheapest flights from Seattle to Denver

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
1:16 p.m. - 5:07 p.m.
SEA
-
DEN
2h 51mdirect
Frontier Logo
9:10 a.m. - 11:19 a.m.
DEN
-
SEA
3h 09mdirect
C$ 141Frontier
Thu, 5 Mar - Mon, 9 Mar
Frontier Logo
1:16 p.m. - 5:07 p.m.
SEA
-
DEN
2h 51mdirect
Frontier Logo
9:10 a.m. - 11:19 a.m.
DEN
-
SEA
3h 09mdirect
C$ 149Frontier
Thu, 5 Mar - Mon, 9 Mar
Frontier Logo
1:16 p.m. - 5:07 p.m.
SEA
-
DEN
2h 51mdirect
Frontier Logo
9:10 a.m. - 11:19 a.m.
DEN
-
SEA
3h 09mdirect
C$ 153Frontier
Thu, 5 Mar - Mon, 9 Mar
Frontier Logo
1:16 p.m. - 5:07 p.m.
SEA
-
DEN
2h 51mdirect
Frontier Logo
9:10 a.m. - 11:19 a.m.
DEN
-
SEA
3h 09mdirect
C$ 164Frontier
Thu, 5 Mar - Mon, 9 Mar
Frontier Logo
12:30 p.m. - 4:20 p.m.
SEA
-
DEN
2h 50mdirect
Frontier Logo
8:45 a.m. - 10:55 a.m.
DEN
-
SEA
3h 10mdirect
C$ 166Frontier
Mon, 23 Feb - Fri, 27 Feb
Frontier Logo
12:30 p.m. - 4:20 p.m.
SEA
-
DEN
2h 50mdirect
Frontier Logo
9:50 p.m. - 8:13 a.m.
DEN
-
SEA
11h 23m
1 stop
C$ 175Frontier
Mon, 23 Feb - Wed, 25 Feb
Frontier Logo
1:16 p.m. - 5:07 p.m.
SEA
-
DEN
2h 51mdirect
Frontier Logo
10:29 p.m. - 5:09 p.m.
DEN
-
SEA
19h 40m
1 stop
C$ 181Frontier
Thu, 5 Mar - Tue, 10 Mar
Frontier Logo
1:16 p.m. - 5:07 p.m.
SEA
-
DEN
2h 51mdirect
Frontier Logo
9:00 a.m. - 5:09 p.m.
DEN
-
SEA
9h 09m
1 stop
C$ 182Frontier
Thu, 5 Mar - Tue, 10 Mar
Frontier Logo
7:33 p.m. - 3:56 a.m.
SEA
-
DEN
7h 23m
1 stop
Frontier Logo
9:00 a.m. - 5:09 p.m.
DEN
-
SEA
9h 09m
1 stop
C$ 185Frontier
Tue, 3 Mar - Tue, 10 Mar
Frontier Logo
12:00 p.m. - 3:50 p.m.
SEA
-
DEN
2h 50mdirect
Frontier Logo
8:45 a.m. - 10:55 a.m.
DEN
-
SEA
3h 10mdirect
C$ 187Frontier
Fri, 27 Feb - Sun, 1 Mar

Frontier flights from Seattle to Denver

Our best Frontier deals on Seattle to Denver flight tickets
Frontier
5 Mar
SEA1:16 p.m.Seattle/Tacoma Intl
2h 51m
DEN5:07 p.m.Denver Intl
9 Mar
DEN9:10 a.m.Denver Intl
3h 09m
SEA11:19 a.m.Seattle/Tacoma Intl
C$ 141
Frontier
5 Mar
SEA1:16 p.m.Seattle/Tacoma Intl
2h 51m
DEN5:07 p.m.Denver Intl
9 Mar
DEN9:10 a.m.Denver Intl
3h 09m
SEA11:19 a.m.Seattle/Tacoma Intl
C$ 149
Frontier
5 Mar
SEA1:16 p.m.Seattle/Tacoma Intl
2h 51m
DEN5:07 p.m.Denver Intl
9 Mar
DEN9:10 a.m.Denver Intl
3h 09m
SEA11:19 a.m.Seattle/Tacoma Intl
C$ 153

Southwest flights from Seattle to Denver

Our best Southwest deals on Seattle to Denver flight tickets
Southwest
6 Mar
SEA5:15 a.m.Seattle/Tacoma Intl
10h 15m
2 stops
DEN4:30 p.m.Denver Intl
7 Mar
DEN8:55 p.m.Denver Intl
3h 00m
SEA10:55 p.m.Seattle/Tacoma Intl
C$ 249
Southwest
26 Mar
SEA5:30 a.m.Seattle/Tacoma Intl
2h 35m
DEN9:05 a.m.Denver Intl
30 Mar
DEN8:10 p.m.Denver Intl
6h 15m
1 stop
SEA1:25 a.m.Seattle/Tacoma Intl
C$ 256
Southwest
26 Mar
SEA5:30 a.m.Seattle/Tacoma Intl
2h 35m
DEN9:05 a.m.Denver Intl
30 Mar
DEN5:40 p.m.Denver Intl
7h 30m
2 stops
SEA12:10 a.m.Seattle/Tacoma Intl
C$ 263

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 6 February 2026.
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

Thu 5/3

1:16 p.m.-5:07 p.m.

Nonstop2h 51m

Denver Intl

Mon 9/3

9:10 a.m.-11:19 a.m.

Nonstop3h 09m

C$ 141

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 5/3

1:16 p.m.-5:07 p.m.

Nonstop2h 51m

Denver Intl

Mon 9/3

9:10 a.m.-11:19 a.m.

Nonstop3h 09m

C$ 149

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 5/3

1:16 p.m.-5:07 p.m.

Nonstop2h 51m

Denver Intl

Mon 9/3

9:10 a.m.-11:19 a.m.

Nonstop3h 09m

C$ 153

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 5/3

1:16 p.m.-5:07 p.m.

Nonstop2h 51m

Denver Intl

Mon 9/3

9:10 a.m.-11:19 a.m.

Nonstop3h 09m

C$ 164

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 23/2

12:30 p.m.-4:20 p.m.

Nonstop2h 50m

Denver Intl

Fri 27/2

8:45 a.m.-10:55 a.m.

Nonstop3h 10m

C$ 166

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 23/2

12:30 p.m.-4:20 p.m.

Nonstop2h 50m

Denver Intl

Wed 25/2

9:50 p.m.-8:13 a.m.

1 stop11h 23m

C$ 175

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 5/3

1:16 p.m.-5:07 p.m.

Nonstop2h 51m

Denver Intl

Tue 10/3

10:29 p.m.-5:09 p.m.

1 stop19h 40m

C$ 181

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 5/3

1:16 p.m.-5:07 p.m.

Nonstop2h 51m

Denver Intl

Tue 10/3

9:00 a.m.-5:09 p.m.

1 stop9h 09m

C$ 182

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 3/3

7:33 p.m.-3:56 a.m.

1 stop7h 23m

Denver Intl

Tue 10/3

9:00 a.m.-5:09 p.m.

1 stop9h 09m

C$ 185

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 27/2

12:00 p.m.-3:50 p.m.

Nonstop2h 50m

Denver Intl

Sun 1/3

8:45 a.m.-10:55 a.m.

Nonstop3h 10m

C$ 187

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

In general, January 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$ 257. If you aren’t able to travel during the month of January, then book flights to Denver from Seattle during February instead. Flights to Denver in February, while not as cheap as those in January, still average around C$ 270.

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

The cheapest day to depart from Seattle to Denver is on a Thursday. Travellers who choose to depart for Denver on a Thursday will often find tickets for as low as C$ 292. On the other hand, Monday 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$ 495.

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 at noon. Flights from Seattle to Denver during this time can be as low as C$ 270. Try not to purchase tickets in the morning because they tend to be around C$ 389. 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$ 292 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$ 242 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.

Can stopping save me money on Seattle to Denver flights?

No. A direct flight is the cheapest option for a flight between Seattle to Denver.

How have Seattle to Denver flight prices changed over time?

As of February 2026, prices for Seattle to Denver flights are approximately 35% 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$ 278

Fastest flight time

2h 43m

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$ 278. The best round-trip flight deal from Seattle to Denver found on momondo in the last 72 hours is C$ 242.
The fastest flight from Seattle to Denver takes 2h 43m
Direct flights go from Seattle to Denver every day.
There is 1 airport in Denver. From Seattle there are direct flights to 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 43m.

  • 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$ 60Free CancellationRating
5.7
3,053 reviews
Search Frontier flights
DeltaPriceFrom C$ 80Free CancellationRating
7.9
8,158 reviews
Search Delta flights
SouthwestPriceFrom C$ 114Free CancellationRating
8.0
4,278 reviews
Search Southwest flights
Hawaiian AirlinesPriceFrom C$ 177Free CancellationRating
7.8
2,831 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom C$ 214Free CancellationRating
8.0
11,843 reviews
Search Alaska Airlines flights

  • Southwest Flights From Seattle to Denver

    Southwest flies from Seattle to Denver around 19 times per week, with 4,278 momondo users rating the airline 8.0/10. The cheapest Southwest deal from Seattle to Denver in the last 72 hours was C$ 114 (round-trip), much lower than the average airfare cost of C$ 242 for Southwest flights on this route.

  • Alaska Airlines Flights From Seattle to Denver

    Alaska Airlines (8.0/10 from 11,843 reviews) operates around 10 flights from Seattle to Denver in any given week. The average Alaska Airlines airfare for this route is around C$ 365, with deals from around C$ 214 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
Lakewood
Longmont
Boulder
Englewood

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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