What airlines fly to Colorado?

Frontier, United Airlines and Delta 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 35% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 7 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

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

Frontier and Alaska Airlines are the most popular carriers operating from Washington to Colorado

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

59 flights are operational daily from State of Washington to Colorado as of July 2025. The most popular departure time for this route is 3:00PM, with 45% of flights per day taking off in the afternoon.

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

As of July 2025, 417 flights take off from State of Washington and land in Colorado each week. The most common flight departure day for this route is Thu, 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 10m on average. Another popular route from State of Washington to Colorado is flying from Pasco to Denver, which will take roughly 2h 23m. Keep in mind that layovers or delays could extend your travel time.

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 7 as of July 2025.

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.

$42 Cheap Flights from Washington to Colorado in 2025

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Find the cheapest flights from Washington to Colorado

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:00 am - 10:53 amSEA-DEN

2h 53mnonstop

10:29 pm - 12:30 amDEN-SEA

3h 01mnonstop

$71Frontier

Find Deal

sáb., oct. 4 - dom., oct. 5

6:00 am - 9:51 amSEA-DEN

2h 51mnonstop

8:55 pm - 11:02 pmDEN-SEA

3h 07mnonstop

$79Frontier

Find Deal

jue., oct. 16 - mié., oct. 22

5:15 pm - 10:44 pmPSC-DEN

4h 29m1 stop

6:25 pm - 11:28 pmDEN-PSC

6h 03m1 stop

$189Delta

Find Deal

lun., sep. 29 - mar., sep. 30

11:55 pm - 10:16 amSEA-COS

9h 21m1 stop

5:55 pm - 10:14 pmCOS-SEA

5h 19m1 stop

$197Delta

Find Deal

mar., ago. 26 - mar., sep. 2

7:57 pm - 12:10 pmPSC-DEN

15h 13m1 stop

3:02 pm - 9:15 pmDEN-PSC

7h 13m1 stop

$208Alaska Airlines

Find Deal

lun., sep. 8 - vie., sep. 19

5:06 am - 10:44 amGEG-DEN

4h 38m1 stop

3:02 pm - 6:50 pmDEN-GEG

4h 48m1 stop

$216Alaska Airlines

Find Deal

mar., sep. 9 - vie., sep. 19

5:02 am - 10:54 amSEA-COS

4h 52m1 stop

10:30 am - 3:53 pmCOS-SEA

6h 23m1 stop

$217United Airlines

Find Deal

mié., sep. 3 - sáb., sep. 6

5:45 am - 9:00 amGEG-DEN

2h 15mnonstop

7:50 am - 9:10 amDEN-GEG

2h 20mnonstop

$217Southwest

Find Deal

vie., ago. 29 - lun., sep. 1

6:25 am - 12:15 pmGEG-DEN

4h 50m1 stop

7:45 am - 9:10 amDEN-GEG

2h 25mnonstop

$223Southwest

Find Deal

mar., oct. 28 - sáb., nov. 1

5:02 am - 12:36 pmSEA-GJT

6h 34m1 stop

6:05 pm - 10:59 pmGJT-SEA

5h 54m1 stop

$229United Airlines

Find Deal

vie., ago. 22 - lun., ago. 25

Frontier flights from State of Washington to Colorado

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

Frontier

Oct 4

SEA7:00 amSeattle/Tacoma Intl

2h 53m

DEN10:53 amDenver Intl

Oct 5

DEN10:29 pmDenver Intl

3h 01m

SEA12:30 amSeattle/Tacoma Intl

$71

Find similar

Frontier

Oct 16

SEA6:00 amSeattle/Tacoma Intl

2h 51m

DEN9:51 amDenver Intl

Oct 22

DEN8:55 pmDenver Intl

3h 07m

SEA11:02 pmSeattle/Tacoma Intl

$79

Find similar

Frontier

Oct 7

SEA6:00 amSeattle/Tacoma Intl

2h 51m

DEN9:51 amDenver Intl

Oct 10

DEN10:29 pmDenver Intl

3h 02m

SEA12:31 amSeattle/Tacoma Intl

$83

Find similar

Alaska Airlines flights from State of Washington to Colorado

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

Alaska Airlines

Sep 8

PSC7:57 pmPasco Tri Cities

15h 13m

1 stop

DEN12:10 pmDenver Intl

Sep 19

DEN3:02 pmDenver Intl

7h 13m

1 stop

PSC9:15 pmPasco Tri Cities

$208

Find similar

Alaska Airlines

Sep 9

GEG5:06 amSpokane

4h 38m

1 stop

DEN10:44 amDenver Intl

Sep 19

DEN3:02 pmDenver Intl

4h 48m

1 stop

GEG6:50 pmSpokane

$216

Find similar

Alaska Airlines

Aug 12

PSC3:46 pmPasco Tri Cities

7h 13m

1 stop

DEN11:59 pmDenver Intl

Aug 16

DEN6:00 amDenver Intl

5h 52m

1 stop

PSC10:52 amPasco Tri Cities

$223

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

sáb. 10/4

7:00 am-10:53 am

Nonstop2h 53m

Denver Intl

dom. 10/5

10:29 pm-12:30 am

Nonstop3h 01m

$71

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

jue. 10/16

6:00 am-9:51 am

Nonstop2h 51m

Denver Intl

mié. 10/22

8:55 pm-11:02 pm

Nonstop3h 07m

$79

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

lun. 9/29

5:15 pm-10:44 pm

1 stop4h 29m

Denver Intl

mar. 9/30

6:25 pm-11:28 pm

1 stop6h 03m

$189

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

mar. 8/26

11:55 pm-10:16 am

1 stop9h 21m

Colorado Springs

mar. 9/2

5:55 pm-10:14 pm

1 stop5h 19m

$197

PascoDenver

PSC - DEN

PSCDEN

Pasco Tri Cities

lun. 9/8

7:57 pm-12:10 pm

1 stop15h 13m

Denver Intl

vie. 9/19

3:02 pm-9:15 pm

1 stop7h 13m

$208

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

mar. 9/9

5:06 am-10:44 am

1 stop4h 38m

Denver Intl

vie. 9/19

3:02 pm-6:50 pm

1 stop4h 48m

$216

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

mié. 9/3

5:02 am-10:54 am

1 stop4h 52m

Colorado Springs

sáb. 9/6

10:30 am-3:53 pm

1 stop6h 23m

$217

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

vie. 8/29

5:45 am-9:00 am

Nonstop2h 15m

Denver Intl

lun. 9/1

7:50 am-9:10 am

Nonstop2h 20m

$217

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

mar. 10/28

6:25 am-12:15 pm

1 stop4h 50m

Denver Intl

sáb. 11/1

7:45 am-9:10 am

Nonstop2h 25m

$223

SeattleGrand Junction

SEA - GJT

SEAGJT

Seattle/Tacoma Intl

vie. 8/22

5:02 am-12:36 pm

1 stop6h 34m

Grand Junction Regnl

lun. 8/25

6:05 pm-10:59 pm

1 stop5h 54m

$229

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 $164. The month of September is another great option to travel to Colorado, with average flight prices from State of Washington averaging around $167.

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 Saturday when prices can be found for as low as $270. On the other hand, Monday 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 $332.

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 $215. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $324 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 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 $207 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 $172 on momondo.

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

There are 4 cabin classes available to choose from on 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	$42
Fastest flight time	2h 15m
Direct flights	Every day
Airports in Colorado	1 airport

The best one-way flight to Colorado from State of Washington in the past 72 hours is $42. The best round-trip flight deal from State of Washington to Colorado found on momondo in the last 72 hours is $71.

The fastest flight from State of Washington to Colorado takes 2h 15m

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

There is 1 airport near Colorado: Denver Intl (DEN)

Search flight deals

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 7 as of July 2025.
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 Boeing 737-800 Passenger/BBJ2 (winglets) (16.36% of total bookings). The next most popular plane models are Boeing 737-900 Passenger/BBJ3 (winglets) (11.91%), Boeing 737 MAX 8 (10.60%), and Boeing 737 MAX 9 (9.94%).

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 $61	Free Cancellation	Rating 5.9 3,239 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $98	Free Cancellation	Rating 7.8 2,611 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $108	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Southwest	PriceFrom $126	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights
United Airlines	PriceFrom $148	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $157	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $169	Free Cancellation	Rating 7.2 10,000 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.

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.

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Popular cities in Colorado

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Cheap flights from Washington to Colorado from $42

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 10/21. 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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Big names and deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from Washington to Colorado

Cheap round-trip flights

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Cheap last minute flights

Cheap direct flights

Frontier flights from State of Washington to Colorado

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

Alaska Airlines flights from State of Washington to Colorado

Our best Alaska Airlines 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

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 Colorado?

The month of October is, on average, the cheapest month to fly to Colorado from State of Washington, with most prices found around $164. The month of September is another great option to travel to Colorado, with average flight prices from State of Washington averaging around $167.

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?

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $215. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $324 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 to Colorado?

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

There are 4 cabin classes available to choose from on 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.

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

Frontier and Alaska Airlines are the most popular carriers operating from Washington to Colorado

What airlines fly to Colorado?

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

59 flights are operational daily from State of Washington to Colorado as of July 2025. The most popular departure time for this route is 3:00PM, with 45% of flights per day taking off in the afternoon.

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

As of July 2025, 417 flights take off from State of Washington and land in Colorado each week. The most common flight departure day for this route is Thu, with 21% of weekly flights taking off on this day.

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

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

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

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

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

What is the most popular plane model from State of 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?

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

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

How can momondo help me find flights 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?

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

Popular cities in Colorado

Popular flights according to clicks in the last 7 days on momondo