$61 Find Cheap Flights from Washington to Colorado

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Low seasonJanuary
High seasonJuly
Cheapest flight$61
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Portland to Denver

Flights from Washington to Colorado: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Washington to Colorado 
Verified travelerFlew with Alaska AirlinesSEA-DENMar 2025
Alaska Air is very efficient & on-time so allow enough time to get luggage, go thru Customs & Immigration, & long security lines. Terminals in SEA are readily accessible by trains but more signage is needed. Fortunately, Information booths are everywhere & are manned by very helpful staff.
MichaelFlew with DeltaSEA-DENApr 2025
Train from Denver airport to downtown is easy to use.
Verified travelerFlew with Alaska AirlinesSEA-DENDec 2024
I didn’t have any problems using Alaska Airlines
GregFlew with SouthwestGEG-DENSep 2024
Southwest is fantastic currently, hopefully they aren't forced to change by greedy Private Equity shareholders.
Verified travelerFlew with Alaska AirlinesSEA-DENMay 2024
When flying from Seattle to Denver, be ready to take our any electronics and put them in separate bins when going through security. You will also most likely have to take off your jacket as well. During our flight back the flight randomly changed so be on the lookout in case that happens to you! It was by chance that I checked my ticket and saw that the gate changed last minute.
Verified travelerFlew with United AirlinesGEG-DENApr 2024
Time to switch planes should be more than 60 minutes.
Verified travelerFlew with United AirlinesPSC-DENFeb 2024
TSA doesn't open til 1030 so getting to the airport early isn't helpful

FAQs for booking flights from Washington to Colorado

  • How does KAYAK find such low prices on flights from Washington to Colorado?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Colorado.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Colorado?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington to Colorado is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington to Colorado?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Washington to Colorado with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Colorado?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Washington to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Colorado?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Colorado is Denver Intl Airport (DEN), with an average flight price of $195.

  • What is the cheapest day to fly to Colorado?

    Based on KAYAK data, the cheapest day to fly to Colorado is Friday where round-trip tickets can be as cheap as $264. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $322 on average.

  • What is the cheapest time of day to fly to Colorado?

    The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $209 on average. Morning departures are around 20% more expensive than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the morning, which is peak travel time and where the average cost of a ticket is $334.

  • What is the cheapest flight to Colorado?

    The cheapest ticket to Colorado from Washington found in the last 72 hours was to Denver, at $108 round-trip. The most popular route is Spokane (GEG) to Denver (DEN) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $108.

  • What is the cheapest month to fly from Washington to Colorado?

    The cheapest month for flights from Washington to Colorado is August, when tickets cost $312 (return) on average. On the other hand, the most expensive months are April and March, when the average cost of round-trip tickets is $406 and $397 respectively.

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

    To get a below average price on the flight from Washington to Colorado, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

  • How long is the flight to Colorado?

    An average nonstop flight from Washington to Colorado takes 5h 04m, covering a distance of 913 miles. The shortest route is Spokane (GEG) to Denver (DEN) with an average flight time of 2h 10m.

  • What are the most popular destinations in Colorado?

    Based on KAYAK flight searches, the most popular destination is Denver (87% of total searches to Colorado). The next most popular destinations are Grand Junction (4%) and Colorado Springs (3%). Searches for flights to Durango (2%), to Montrose (2%) and to Aspen (2%) are also popular.

Top 5 airlines serving from Washington to Colorado

Need help choosing which airline to fly with from Washington to Colorado? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9968 reviews
7.1Food
7.9Comfort
8.5Crew
7.1Entertainment
8.2Boarding
Airline reviews

I made a mistake. Read what I wrote in the flight from Dulles to SEA. The negative experience was from SEA to BOI. Total garbage. Wont do it again.

2.0 MediocreAnonymous, Apr 2025SEA - BOI
Read more Alaska Airlines reviews

I made a mistake. Read what I wrote in the flight from Dulles to SEA. The negative experience was from SEA to BOI. Total garbage. Wont do it again.

Need to get on train for second flight it’s much nicer when all the gates are together for obvious reasons

Cramped, crowded aircraft. Poorly organized boarding. Tasteless crackers to eat. 40 minutes late. A standard US air travel experience.

Made us check our carry on,even though there was plenty of room because they didn't check with the flight crew. Also boarding was 40min late, due to the plane being on the wrong side of the airport. Also their app didn't record my tsa precheck

Would not mind having movie options an available like Delta, but is not necessary. Did not have food, so cannot appropriately rate that section.

Three hour flight so snacks and basic drinks unless you pre buy as usual. Didn’t do my emtertainment as was tired after 23 hours of travel. You have to use your own device on US flights if travelers aren’t aware so if you only use your cell phone that can be small. Crew are great.

Awful. We got the last seats and they don't recline. We've been on this horrible journey since 6am and won't get to our destination almost a full day later. Oh and no food, either. Never again.

Flight was smooth, but the overhead bins were not deep enough to stow bags vertically and we ran out of room - even with 8 passengers voluntarily gate-checking their bags.

An uneventful flight is a good experience although one of the pilots gauges wasn’t working right so we had a half hour delay—no one can foresee that.

Plane was delayed and got me in past bedtime. But more importantly, my tsa precheck number wasn’t on my ticket so had to deal with the general line. Oh well, guess the delay helped that situation.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

The seats were a bit cramped and worn, but otherwise okay.

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

WiFi on the flight was not working. Thus, entertainment options were limited.

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

For the first time in a long time we had a flawless experience with Southwest. Both flights were early and no mechanical errors at all. We were shocked and pleasantly surprised 😮.

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Food choices were very limited. Taste of the dishes was average.

I liked all the informational texts. I always knew where to go and when .

Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.

The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

Flight was 3 1/2 hour delayed with no credit or meal vouchers

late departure due to some unspecified issue with ventilating the cabin. They got it running but it was FREEZING for the whole flight. I asked for a blanket but they didn't provide one. They could not turn up the heat. it was quite miserable.

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

The plane failed preflight inspection, so we sat there for 90 mins while they tried to fix it. Ultimately, everything was remedied and we made our connecting flight; instead of a 2 hour layover at the airport, we spent it waiting on the plane.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

The seats were extremely hard and uncomfortable. It was disappointing even for a budget airline.

Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?

Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.

Allowed me to chose my seat without extra charge (I purchased full-price ticket) and boarding was in group1. Didn't even serve water.

Stuck in Phoenix for two days, not even a hotel voucher offered.

Every day about it was very different all the boarding pass where all wrong l miss flight no refund all crazy

Flight got delayed for 3.5 hours, and for the first hour after the departure time there was no update from the gate folks...

Book cheap flights from Washington to Colorado

Recent round-trip flight deals

7/15Tue
nonstopFrontier
2h 39mPDX-DEN
7/23Wed
nonstopFrontier
2h 48mDEN-PDX
$121
5/27Tue
nonstopFrontier
2h 38mPDX-DEN
5/28Wed
nonstopFrontier
2h 44mDEN-PDX
$122
5/20Tue
1 stopAlaska Airlines
6h 19mPDX-DEN
5/31Sat
nonstopAlaska Airlines
2h 45mDEN-PDX
$187
5/21Wed
nonstopDelta
2h 50mSEA-DEN
6/3Tue
nonstopDelta
2h 58mDEN-SEA
$197
5/20Tue
1 stopAlaska Airlines
4h 37mPDX-DEN
5/21Wed
1 stopAlaska Airlines
5h 53mDEN-PDX
$197
5/30Fri
nonstopUnited Airlines
2h 25mPSC-DEN
6/2Mon
nonstopUnited Airlines
2h 31mDEN-PSC
$209
5/29Thu
2 stopsSouthwest
7h 25mPDX-DEN
6/5Thu
nonstopSouthwest
2h 35mDEN-PDX
$212
7/5Sat
1 stopDelta
5h 28mGEG-DEN
7/22Tue
1 stopDelta
4h 23mDEN-GEG
$216
5/28Wed
nonstopUnited Airlines
2h 20mGEG-DEN
6/4Wed
nonstopUnited Airlines
2h 23mDEN-GEG
$217
6/13Fri
nonstopSouthwest
2h 40mSEA-DEN
6/16Mon
1 stopSouthwest
6h 20mDEN-SEA
$227

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Recent one-way flight deals

7/26Sat
nonstopFrontier
2h 39mPDX-DEN
$61
5/21Wed
nonstopFrontier
2h 38mPDX-DEN
$62
5/24Sat
nonstopAlaska Airlines
2h 39mPDX-DEN
$89
6/3Tue
1 stopAlaska Airlines
6h 49mGEG-DEN
$98
6/3Tue
nonstopUnited Airlines
2h 20mGEG-DEN
$99
6/9Mon
1 stopDelta
4h 10mPSC-DEN
$105
7/4Fri
1 stopDelta
6h 26mGEG-DEN
$108
5/20Tue
2 stopsUnited Airlines
11h 18mSEA-COS
$114
7/30Wed
2 stopsSouthwest
7h 00mGEG-DEN
$114
5/20Tue
2 stopsSouthwest
8h 30mSEA-DEN
$114

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Last minute flights from Washington to Colorado

Last minute flight, train and bus deals

5/5Mon
nonstopFrontier
2h 38mPDX-DEN
5/20Tue
nonstopFrontier
2h 44mDEN-PDX
$188
5/5Mon
multi-stopFrontier
6h 38mSEA-DEN
5/6Tue
nonstopFrontier
3h 06mDEN-SEA
$213
5/5Mon
multi-stopSouthwest
7h 05mPDX-DEN
5/20Tue
multi-stopSouthwest
5h 40mDEN-PDX
$349
5/3Sat
multi-stopUnited Airlines
6h 59mSEA-DEN
5/6Tue
nonstopUnited Airlines
3h 01mDEN-SEA
$358
5/3Sat
multi-stopSouthwest
7h 10mSEA-DEN
5/6Tue
nonstopSouthwest
2h 55mDEN-SEA
$362
5/1Thu
multi-stopUnited Airlines
6h 59mSEA-DEN
5/6Tue
multi-stopUnited Airlines
6h 03mDEN-SEA
$367
5/5Mon
multi-stopAlaska Airlines
7h 16mSEA-DEN
5/6Tue
multi-stopAlaska Airlines
5h 11mDEN-SEA
$371
5/3Sat
multi-stopDelta
4h 19mSEA-GJT
5/6Tue
multi-stopDelta
4h 15mGJT-SEA
$399
5/3Sat
multi-stopAlaska Airlines
4h 51mSEA-DEN
5/3Sat
multi-stopAlaska Airlines
4h 51mDEN-SEA
$426
5/1Thu
multi-stopDelta
6h 26mSEA-DEN
5/1Thu
multi-stopDelta
6h 57mDEN-SEA
$427

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Everything you need to know for your flight to Colorado

Cabin class types available on flights to Washington

Cabin classes available on flights to Washington. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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