What is the cheapest airline that flies from Washington to Colorado?

Alaska Airlines, Southwest, and Delta are the most popular carriers operating from Washington to Colorado

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

As of June 2026, 357 flights take off from State of Washington and land in Colorado each week. The most common flight departure day for this route is Wed, with 21% of weekly flights taking off on this day.

How long is the flight from State of Washington to Colorado?

Flight times from State of Washington to Colorado vary, but if you’re flying out of Spokane and flying into Denver (one of the most popular routes), then the duration is 2h 16m on average. Another popular route from State of Washington to Colorado is flying from Pasco to Denver, which will take roughly 2h 21m. Keep in mind that layovers or delays could extend your travel time.

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

51 flights are operational daily from State of Washington to Colorado as of June 2026. The most popular departure time for this route is 1:00PM, with 45% of flights per day taking off in the afternoon.

What airlines fly to Colorado?

Frontier, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Colorado from State of Washington according to our data. Frontier is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 8 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Washington to Colorado?

Prices for flights from Washington to Colorado refresh daily.

How many operators does momondo search for flights from Washington to Colorado?

The number of operators available for flights from Washington to Colorado is 8 as of June 2026.

How old do you have to be to fly from Washington to Colorado?

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 Colorado.

What documentation or ID do you need to fly to Colorado?

The required travel and health documents for your Colorado trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Colorado. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$105 Cheap Flights from Washington to Colorado in 2026

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Find the cheapest flights from Washington to Colorado

Round-trip

One-way

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Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 pm - 3:52 am

SEA

DEN

7h 52m

1 stop

7:45 am - 9:51 am

DEN

SEA

3h 06mnonstop

$183Frontier

Mon, Sep 14 - Fri, Sep 18

7:06 pm - 10:58 pm

SEA

DEN

2h 52mnonstop

7:15 am - 9:19 am

DEN

SEA

3h 04mnonstop

$184Frontier

Tue, Aug 18 - Sat, Aug 22

6:04 pm - 11:59 pm

PSC

DEN

4h 55m

1 stop

8:00 am - 3:22 pm

DEN

PSC

8h 22m

1 stop

$249Alaska Airlines

Wed, Aug 12 - Tue, Aug 18

5:06 am - 10:39 am

GEG

DEN

4h 33m

1 stop

8:20 am - 11:47 pm

DEN

GEG

16h 27m

1 stop

$285Alaska Airlines

Sat, Dec 12 - Wed, Dec 16

7:16 am - 5:36 pm

SEA

COS

9h 20m

2 stops

6:16 pm - 10:05 pm

COS

SEA

4h 49m

1 stop

$285Delta

Tue, Aug 11 - Sat, Aug 15

11:22 am - 5:34 pm

SEA

COS

5h 12m

1 stop

6:14 pm - 10:05 pm

COS

SEA

4h 51m

1 stop

$287Delta

Tue, Sep 15 - Wed, Sep 23

5:00 am - 10:58 am

SEA

COS

4h 58m

1 stop

6:03 pm - 10:59 pm

COS

SEA

5h 56m

1 stop

$297United Airlines

Tue, Sep 29 - Wed, Sep 30

12:16 pm - 9:24 pm

SEA

COS

8h 08m

2 stops

6:03 pm - 10:59 pm

COS

SEA

5h 56m

1 stop

$302United Airlines

Tue, Sep 29 - Wed, Sep 30

9:25 pm - 10:45 am

SEA

COS

12h 20m

1 stop

5:20 pm - 11:25 pm

COS

SEA

7h 05m

1 stop

$324Southwest

Sun, Aug 16 - Wed, Aug 19

7:00 am - 7:20 pm

SEA

MTJ

11h 20m

2 stops

9:10 am - 5:05 pm

MTJ

SEA

8h 55m

2 stops

$409Southwest

Thu, Aug 13 - Mon, Aug 17

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Alaska Airlines flights from State of Washington to Colorado

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

Alaska Airlines

Aug 12

PSC6:04 pmPasco Tri Cities

4h 55m

1 stop

DEN11:59 pmDenver Intl

Aug 18

DEN8:00 amDenver Intl

8h 22m

1 stop

PSC3:22 pmPasco Tri Cities

$249

Alaska Airlines

Sep 19

GEG6:00 amSpokane

14h 13m

1 stop

DEN9:13 pmDenver Intl

Sep 23

DEN1:43 pmDenver Intl

11h 10m

1 stop

GEG11:53 pmSpokane

$287

Alaska Airlines

Aug 11

PSC3:59 pmPasco Tri Cities

4h 41m

1 stop

DEN9:40 pmDenver Intl

Aug 18

DEN8:00 amDenver Intl

8h 22m

1 stop

PSC3:22 pmPasco Tri Cities

$288

Frontier flights from State of Washington to Colorado

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

Frontier

Sep 14

SEA7:00 pmSeattle/Tacoma Intl

7h 52m

1 stop

DEN3:52 amDenver Intl

Sep 18

DEN7:45 amDenver Intl

3h 06m

SEA9:51 amSeattle/Tacoma Intl

$183

Frontier

Aug 18

SEA7:06 pmSeattle/Tacoma Intl

2h 52m

DEN10:58 pmDenver Intl

Aug 22

DEN7:15 amDenver Intl

3h 04m

SEA9:19 amSeattle/Tacoma Intl

$184

Frontier

Aug 18

SEA7:06 pmSeattle/Tacoma Intl

2h 52m

DEN10:58 pmDenver Intl

Aug 25

DEN11:05 amDenver Intl

3h 17m

SEA1:22 pmSeattle/Tacoma Intl

$185

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 9/14

7:00 pm-3:52 am

1 stop7h 52m

Denver Intl

Fri 9/18

7:45 am-9:51 am

Nonstop3h 06m

$183

Quickest round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 8/18

7:06 pm-10:58 pm

Nonstop2h 52m

Denver Intl

Sat 8/22

7:15 am-9:19 am

Nonstop3h 04m

$184

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

Wed 8/12

6:04 pm-11:59 pm

1 stop4h 55m

Denver Intl

Tue 8/18

8:00 am-3:22 pm

1 stop8h 22m

$249

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Sat 12/12

5:06 am-10:39 am

1 stop4h 33m

Denver Intl

Wed 12/16

8:20 am-11:47 pm

1 stop16h 27m

$285

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Tue 8/11

7:16 am-5:36 pm

2 stops9h 20m

Colorado Springs

Sat 8/15

6:16 pm-10:05 pm

1 stop4h 49m

$285

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Tue 9/15

11:22 am-5:34 pm

1 stop5h 12m

Colorado Springs

Wed 9/23

6:14 pm-10:05 pm

1 stop4h 51m

$287

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Tue 9/29

5:00 am-10:58 am

1 stop4h 58m

Colorado Springs

Wed 9/30

6:03 pm-10:59 pm

1 stop5h 56m

$297

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Tue 9/29

12:16 pm-9:24 pm

2 stops8h 08m

Colorado Springs

Wed 9/30

6:03 pm-10:59 pm

1 stop5h 56m

$302

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Sun 8/16

9:25 pm-10:45 am

1 stop12h 20m

Colorado Springs

Wed 8/19

5:20 pm-11:25 pm

1 stop7h 05m

$324

SeattleMontrose

SEA - MTJ

SEAMTJ

Seattle/Tacoma Intl

Thu 8/13

7:00 am-7:20 pm

2 stops11h 20m

Montrose County

Mon 8/17

9:10 am-5:05 pm

2 stops8h 55m

$409

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 Colorado

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 Colorado?

The month of October is, on average, the cheapest month to fly to Colorado from State of Washington, with most prices found around $210. The month of September is another great option to travel to Colorado, with average flight prices from State of Washington averaging around $223.

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

The cheapest day to depart from State of Washington to Colorado is on a Friday when prices can be found for as low as $294. On the other hand, Sunday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $364.

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

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $258. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $348 per ticket.

What is the cheapest Washington to Colorado flight route?

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

How far in advance should I book a flight from Washington to Colorado?

You are more likely to see cheaper flights to Colorado from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around $229 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from State of Washington for as low as $180 on momondo.

What cabin class options are available on State of Washington to Colorado flights?

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

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

Cheap State of Washington to Colorado flight deals and tips

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

Best Price Found	$185
Fastest flight time	2h 16m
Direct flights	Every day
Airports in Colorado	87 airports

The best one-way flight to Colorado from State of Washington in the past 72 hours is $185. The best round-trip flight deal from State of Washington to Colorado found on momondo in the last 72 hours is $333.

The fastest flight from State of Washington to Colorado takes 2h 16m

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

There are 87 airports in Colorado. From State of Washington there are direct flights to Denver Intl (DEN).

Search flight deals

Frequently asked questions about flying from Washington to Colorado

When did momondo last update prices for flights from Washington to Colorado?
Prices for flights from Washington to Colorado refresh daily.
How many operators does momondo search for flights from Washington to Colorado?
The number of operators available for flights from Washington to Colorado is 8 as of June 2026.
How old do you have to be to fly from Washington to Colorado?
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 Colorado.
What documentation or ID do you need to fly to Colorado?
The required travel and health documents for your Colorado trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Colorado. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from State of Washington to Colorado?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from State of Washington to Colorado is Airbus A321neo (19.02% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (16.14%), Boeing 737-800 (13.06%), and Boeing 737-800 Passenger/BBJ2 (winglets) (11.40%).

Best airlines flying from State of Washington to Colorado

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $56	Free Cancellation	Rating 5.6 2,867 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $69	Free Cancellation	Rating 7.8 2,826 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $91	Free Cancellation	Rating 7.8 8,431 reviews	Search Delta flights
Alaska Airlines	PriceFrom $108	Free Cancellation	Rating 7.9 12,565 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 7.9 4,242 reviews	Search Southwest flights
United Airlines	PriceFrom $131	Free Cancellation	Rating 7.4 9,879 reviews	Search United Airlines flights
JetBlue	PriceFrom $200	Free Cancellation	Rating 7.1 3,002 reviews	Search JetBlue flights
American Airlines	PriceFrom $228	Free Cancellation	Rating 7.1 11,750 reviews	Search American Airlines flights

Why use momondo?

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

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

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

Yes. momondo allows you to filter the results for Washington to Colorado flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to Colorado.

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

Yes momondo offers price alerts on flights to Colorado from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Flights to Washington, D.C.from $57

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Flights to Dallasfrom $59

Cheap flights from Washington to Colorado from $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 Washington to Colorado departing on 8/18. 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 Colorado

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

Frontier flights from State of Washington to Colorado

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

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

What is the cheapest month to fly to Colorado?

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

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

What is the cheapest Washington to Colorado flight route?

How far in advance should I book a flight from Washington to Colorado?

What cabin class options are available on State of Washington to Colorado flights?

Can stopping save me money on State of Washington to Colorado flights?

What is the cheapest airline that flies from Washington to Colorado?

What airlines fly to Colorado?

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

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

How long is the flight from State of Washington to Colorado?

Cheap State of Washington to Colorado flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Colorado

Frequently asked questions about flying from Washington to Colorado

Best airlines flying from State of Washington to Colorado

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

Why use momondo?

An easier way to manage your Colorado 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 Colorado

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