What is the cheapest airline that flies from Washington to Denver Intl?

Frontier, Delta, and Southwest are the most popular carriers operating from Washington to Denver Intl

How long does it take to fly to Denver?

Flight times vary depending on what airport in State of Washington you fly out of and what airport in Denver you fly into. For example, flying from Spokane to Denver takes 2h 13m on average. On the other hand, flying from Pasco to Denver takes 2h 22m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What airlines fly to Denver?

Frontier, United Airlines and Delta are the top three most popular airlines that fly to Denver from State of Washington according to our data. Frontier is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 6 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

How many flights depart from State of Washington to Denver on average per week?

281 flights are operational weekly from State of Washington to Denver as of February 2026. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

How many flights depart from State of Washington to Denver on average per day?

40 flights are operational daily from State of Washington to Denver as of February 2026. The most popular departure time for this route is 7:00PM, with 44% of flights per day taking off in the afternoon.

When did momondo last update prices for flights from Washington to Denver Intl Airport?

Prices for flights from Washington to Denver Intl Airport refresh daily.

How many operators does momondo search for flights from Washington to Denver Intl Airport?

As of February 2026, there are 6 operators available to choose from for flights from Washington to Denver Intl Airport.

How old do you have to be to fly from Washington to Denver Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington 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.

$39 Cheap Flights from Washington to Denver in 2026

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Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

1:16 pm - 5:07 pm

SEA

DEN

2h 51mnonstop

9:10 am - 11:19 am

DEN

SEA

3h 09mnonstop

$72Frontier

Thu, Mar 5 - Mon, Mar 9

6:57 pm - 10:49 pm

SEA

DEN

2h 52mnonstop

12:51 pm - 3:05 pm

DEN

SEA

3h 14mnonstop

$76Frontier

Wed, Apr 15 - Mon, Apr 20

7:05 am - 10:42 am

PDX

DEN

2h 37mnonstop

9:10 am - 11:09 am

DEN

PDX

2h 59mnonstop

$127Multiple Airlines

Fri, Feb 27 - Sun, Mar 15

7:05 am - 10:42 am

PDX

DEN

2h 37mnonstop

9:10 am - 11:09 am

DEN

PDX

2h 59mnonstop

$129Multiple Airlines

Wed, Mar 11 - Thu, Mar 19

5:00 am - 10:42 am

GEG

DEN

4h 42m

1 stop

6:16 pm - 11:01 pm

DEN

GEG

5h 45m

1 stop

$197Alaska Airlines

Tue, Mar 3 - Tue, Mar 10

5:00 am - 8:30 am

PSC

DEN

2h 30mnonstop

7:14 pm - 8:54 pm

DEN

PSC

2h 40mnonstop

$209United Airlines

Tue, Feb 24 - Thu, Mar 12

5:45 pm - 11:25 pm

PSC

DEN

4h 40m

1 stop

6:40 am - 10:41 am

DEN

PSC

5h 01m

1 stop

$229Delta

Thu, Feb 26 - Mon, Mar 2

3:55 pm - 9:39 pm

PSC

DEN

4h 44m

1 stop

8:00 am - 3:24 pm

DEN

PSC

8h 24m

1 stop

$238Alaska Airlines

Sun, Aug 2 - Wed, Aug 12

5:00 pm - 10:27 pm

PSC

DEN

4h 27m

1 stop

6:20 pm - 11:38 pm

DEN

PSC

6h 18m

1 stop

$249Delta

Fri, Feb 20 - Mon, Feb 23

5:00 am - 8:30 am

PSC

DEN

2h 30mnonstop

7:10 pm - 8:50 pm

DEN

PSC

2h 40mnonstop

$262United Airlines

Fri, Feb 27 - Mon, Mar 2

Alaska Airlines flights from State of Washington to Denver

Our best Alaska Airlines deals on State of Washington to Denver flight tickets

Alaska Airlines

Mar 4

PDX7:05 amPortland

2h 37m

DEN10:42 amDenver Intl

Mar 10

DEN11:38 amDenver Intl

3h 00m

PDX1:38 pmPortland

$137

Alaska Airlines

Mar 3

GEG5:00 amSpokane

4h 42m

1 stop

DEN10:42 amDenver Intl

Mar 10

DEN6:16 pmDenver Intl

6h 43m

1 stop

GEG11:59 pmSpokane

$197

Alaska Airlines

Mar 3

GEG12:00 pmSpokane

10h 59m

2 stops

DEN11:59 pmDenver Intl

Mar 10

DEN6:16 pmDenver Intl

6h 43m

1 stop

GEG11:59 pmSpokane

$225

Frontier flights from State of Washington to Denver

Our best Frontier deals on State of Washington to Denver flight tickets

Frontier

Mar 5

SEA1:16 pmSeattle/Tacoma Intl

2h 51m

DEN5:07 pmDenver Intl

Mar 9

DEN9:10 amDenver Intl

3h 09m

SEA11:19 amSeattle/Tacoma Intl

$72

Frontier

Apr 15

SEA6:57 pmSeattle/Tacoma Intl

2h 52m

DEN10:49 pmDenver Intl

Apr 20

DEN12:51 pmDenver Intl

3h 14m

SEA3:05 pmSeattle/Tacoma Intl

$76

Frontier

Apr 16

SEA6:57 pmSeattle/Tacoma Intl

2h 52m

DEN10:49 pmDenver Intl

Apr 21

DEN7:15 amDenver Intl

3h 12m

SEA9:27 amSeattle/Tacoma Intl

$77

Fly from

Fly to

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 3/5

1:16 pm-5:07 pm

Nonstop2h 51m

Denver Intl

Mon 3/9

9:10 am-11:19 am

Nonstop3h 09m

$72

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 4/15

6:57 pm-10:49 pm

Nonstop2h 52m

Denver Intl

Mon 4/20

12:51 pm-3:05 pm

Nonstop3h 14m

$76

PortlandDenver

PDX - DEN

PDXDEN

Portland

Fri 2/27

7:05 am-10:42 am

Nonstop2h 37m

Denver Intl

Sun 3/15

9:10 am-11:09 am

Nonstop2h 59m

$127

PortlandDenver

PDX - DEN

PDXDEN

Portland

Wed 3/11

7:05 am-10:42 am

Nonstop2h 37m

Denver Intl

Thu 3/19

9:10 am-11:09 am

Nonstop2h 59m

$129

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Tue 3/3

5:00 am-10:42 am

1 stop4h 42m

Denver Intl

Tue 3/10

6:16 pm-11:01 pm

1 stop5h 45m

$197

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

Tue 2/24

5:00 am-8:30 am

Nonstop2h 30m

Denver Intl

Thu 3/12

7:14 pm-8:54 pm

Nonstop2h 40m

$209

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

Thu 2/26

5:45 pm-11:25 pm

1 stop4h 40m

Denver Intl

Mon 3/2

6:40 am-10:41 am

1 stop5h 01m

$229

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

Sun 8/2

3:55 pm-9:39 pm

1 stop4h 44m

Denver Intl

Wed 8/12

8:00 am-3:24 pm

1 stop8h 24m

$238

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

Fri 2/20

5:00 pm-10:27 pm

1 stop4h 27m

Denver Intl

Mon 2/23

6:20 pm-11:38 pm

1 stop6h 18m

$249

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

Fri 2/27

5:00 am-8:30 am

Nonstop2h 30m

Denver Intl

Mon 3/2

7:10 pm-8:50 pm

Nonstop2h 40m

$262

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington 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

Prices

Airlines

Other information

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from State of Washington is in January. Flight prices, which tend to average around $188, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in January, then you should wait until February to fly from State of Washington, when ticket prices are also cheap, with an average price of $197.

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 $271. 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 $337.

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

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $248. Flights in the morning are often more expensive with an average ticket price of $319.

What is the cheapest Washington to Denver Intl flight route?

Fly from Seattle/Tacoma Intl to Denver Intl for the best Washington - 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 State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $214 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from State of Washington for as low as $177 on momondo.

What cabin class options are available on Washington to Denver Intl flights?

There are 4 cabin classes available to choose from on Washington 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 State of Washington to Denver flights?

No. A direct flight is the cheapest option for a flight between State of Washington to Denver.

Cheap State of Washington to Denver flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Denver

Best Price Found	$136
Fastest flight time	2h 13m
Direct flights	Every day
Airports in Denver	1 airport

The best one-way flight to Denver from State of Washington in the past 72 hours is $136. The best round-trip flight deal from State of Washington to Denver found on momondo in the last 72 hours is $204.

The fastest flight from State of Washington to Denver takes 2h 13m

Direct flights go from State of Washington to Denver every day.

There is 1 airport in Denver. From State of Washington there are direct flights to Denver Intl (DEN).

Search flight deals

When did momondo last update prices for flights from Washington to Denver Intl Airport?
Prices for flights from Washington to Denver Intl Airport refresh daily.
How many operators does momondo search for flights from Washington to Denver Intl Airport?
As of February 2026, there are 6 operators available to choose from for flights from Washington to Denver Intl Airport.
How old do you have to be to fly from Washington to Denver Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington 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 State of Washington to Denver?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to Denver is Boeing 737 MAX 8, representing 14.32% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 12.23%, Boeing 737 MAX 9 at 11.51%, and Boeing 737-800 at 9.37%.

Best airlines flying from State of Washington to Denver

Compare and see reviews for airlines that fly from State of Washington to Denver with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $57	Free Cancellation	Rating 5.7 3,052 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $78	Free Cancellation	Rating 7.8 2,830 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $98	Free Cancellation	Rating 7.9 8,135 reviews	Search Delta flights
Alaska Airlines	PriceFrom $117	Free Cancellation	Rating 8.0 11,831 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $127	Free Cancellation	Rating 8.0 4,273 reviews	Search Southwest flights
United Airlines	PriceFrom $131	Free Cancellation	Rating 7.4 9,232 reviews	Search United Airlines flights

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Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Denver. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Denver from Washington which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Denver from Washington.

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

Yes. momondo can track prices for Washington 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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Cheap flights from Washington to Denver from $39

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Denver departing on 3/5. 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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Alaska Airlines flights from State of Washington to Denver

Our best Alaska Airlines deals on State of Washington to Denver flight tickets

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Our best Frontier deals on State of Washington to Denver flight tickets

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How to get the cheapest flight ticket from State of Washington to Denver

What is the cheapest month to fly to Denver?

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 $271. 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 $337.

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

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $248. Flights in the morning are often more expensive with an average ticket price of $319.

What is the cheapest Washington to Denver Intl flight route?

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

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

What cabin class options are available on Washington to Denver Intl flights?

There are 4 cabin classes available to choose from on Washington 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 State of Washington to Denver flights?

No. A direct flight is the cheapest option for a flight between State of Washington to Denver.

What is the cheapest airline that flies from Washington to Denver Intl?

Frontier, Delta, and Southwest are the most popular carriers operating from Washington to Denver Intl

What airlines fly to Denver?

How many flights depart from State of Washington to Denver on average per day?

40 flights are operational daily from State of Washington to Denver as of February 2026. The most popular departure time for this route is 7:00PM, with 44% of flights per day taking off in the afternoon.

How many flights depart from State of Washington to Denver on average per week?

281 flights are operational weekly from State of Washington to Denver as of February 2026. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

How long does it take to fly to Denver?

Cheap State of Washington to Denver flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Denver

Best Price Found

Fastest flight time

Direct flights

Airports in Denver

When did momondo last update prices for flights from Washington to Denver Intl Airport?

How many operators does momondo search for flights from Washington to Denver Intl Airport?

How old do you have to be to fly from Washington to Denver Intl Airport?

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

What is the most popular plane model from State of Washington to Denver?

Best airlines flying from State of Washington to Denver

Compare and see reviews for airlines that fly from State of Washington to Denver with momondo

Traveling to a place near Denver?

Why use momondo?

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

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

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

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

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Colorado