$55 Find Cheap Flights from Colorado to District of Columbia

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Low seasonFebruary
High seasonJuly
Cheapest flight$55
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Denver to Washington Dulles Airport

Flights from Colorado to District of Columbia: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Colorado to District of Columbia 
JasonFlew with United AirlinesDEN-IADNov 2024
DIA is a large airport. Get there early.
BindulFlew with United AirlinesDEN-IADFeb 2024
There are multiple flights between DEN and IAD everyday, including some wide bodies. Try and get on one of the wide bodies whenever possible.

FAQs for booking flights from Colorado to District of Columbia

  • How does KAYAK find such low prices on flights from Colorado to District of Columbia?

    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 Colorado to District of Columbia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Colorado to District of Columbia 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 Colorado to District of Columbia?

    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 Colorado to District of Columbia 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 Colorado to District of Columbia?

    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 Colorado to District of Columbia 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 District of Columbia?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in District of Columbia is Washington, D.C. Reagan-National Airport (DCA), with an average flight price of $165.

  • What is the cheapest day to fly to District of Columbia?

    Based on KAYAK data, the cheapest day to fly to District of Columbia is Friday where round-trip tickets can be as cheap as $324. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $430 on average.

  • What is the cheapest time of day to fly to District of Columbia?

    The cheapest time of day to fly to District of Columbia is generally in the morning, when round-trip flights cost $312 on average. Morning departures are around 20% cheaper than evening flights, on average. The most expensive time of day to fly to District of Columbia is generally at night, which is peak travel time and where the average cost of a ticket is $614.

  • What is the cheapest flight to District of Columbia?

    The cheapest ticket to District of Columbia from Colorado found in the last 72 hours was to Baltimore, at $150 round-trip. The most popular route is Colorado Springs (COS) to Baltimore (BWI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $150.

  • What is the cheapest month to fly from Colorado to District of Columbia?

    The cheapest month for flights from Colorado to District of Columbia is October, when tickets cost $226 (return) on average. On the other hand, the most expensive months are December and February, when the average cost of round-trip tickets is $399 and $348 respectively.

  • How far in advance should I book a flight from Colorado to District of Columbia?

    To get a below average price on the flight from Colorado to District of Columbia, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

  • How long is the flight to District of Columbia?

    An average nonstop flight from Colorado to District of Columbia takes 7h 04m, covering a distance of 1581 miles. The shortest route is Denver (DEN) to Washington, D.C. Dulles Intl Airport (IAD) with an average flight time of 3h 14m.

  • What is the most popular destination in District of Columbia?

    Based on KAYAK flight searches, the most popular destination is Washington, D.C. (100% of total searches to District of Columbia).

Reviews of the top 5 airlines serving from Colorado to District of Columbia

 
Need help choosing which airline to fly with from Colorado to District of Columbia? 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
SouthwestOverall score based on 4273 reviews
8.2Boarding
7.6Entertainment
7.0Food
8.6Crew
8.0Comfort
Airline reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

4.0 OkayTraci, Jun 2025OAK - SEA
Read more Southwest reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Sat on tarmac for 2 hours and then missed my connecting flight

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

Everything was on time. I was disappointed by the front section female, African American flight attendant. I did not see her name tag or would have identified by name not race. As passengers moved to the bathroom early in flight, she would say with a disdainful tone “I have to say the seat belt light is on” then go back to her book. Better trained flight attendants say something like be careful the seat belt light is on.

Cluster mess boarding. Can't wait for SWA reserved seating. Internet didn't seem to work on the plane.

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

Flight was an hour late, who knows why. It was OK, nothing outstanding.

Only not having an assigned seat was an issue. Rest was great

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was organised and relaxed. Crew were fantastic! Seats were lacking padding causing butt pain and stiffness.

I like for how they process during check in. It was very smoothly.

United airlines, mediocre at best. No issues , nothing great . Worked for me

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

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

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

Mechanical delay and no compensation. Missed connection as a result of their delay. Mediocre performance and service. Horrible airline currently with horrible culture.

Weather delay for 2.5 hours followed by half hour crew delay, did not have ginger ale, uncomfortable seats

It was nobody’s fault - but the plane came 4-hrs late and we were updated randomly in 20-30 mins increments which left us hostage to sit and wait expectantly. It was very long and got very late. Our plane didn’t land until nearly 1 am! Also the toilet wasn’t working. The hosts were nice enough but were clearly “about to pass out” as one told me. Lastly, there was no snack or even time for it. Just a bad experience overall.

Any sort of gluten free snack option would be nice

The boarding crew was incredibly helpful getting me on an earlier flight

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

Crew was late. Baggage was late. 2hs inside the plane waiting fro de-icing and traffic. A 3:30hs flight ended up being almost 6hs inside the airplane.

Flight delayed on both ends - have a gate ready at DCA, don't make us sit for 30min after being late to take off as well.

AA can't control the weather. But the airplane was hot and stuffy while stuck on the runway with a broken entertainment system.

very bare bones flight no entertainment screen, download shows prior to boarding to watch on phone or tablet.

Very bad! No good service delayed my second connection flight

Frontier is terrible. Paid for exit row, not given exit row, refused to refund fee.

2 hour delay due to late plane, wrong size plane causing overbooking, and people getting off and on the plane after boarding was completed.

The worst. We never made our connection and they did absolutely nothing to help us at the airport.

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

The Boarding process in Denver was chaotic, and since the line was so long, we were lined up very far from the gate. If there were any announcements from the gate staff, we didn't hear them. The flight attendants were spectacular. The only negative part of the flight was sitting by a 2 1/2 year old who was unruly and unfortunately had parents that matched his behaviors. Also, the restaurants in Denver on the E concourse, they didn't have food (passengers could only order 1 item on the entire menu) or the restaurants had 12-14 people waiting for orders to be prepared and another 6 people waiting to order. If you have a layover in Denver and need to grab food, be prepared to visit the shops with pre-packaged sandwiches, or you can visit another concourse but it may take a while to transit throughout the airport.

Everything went as planned. Crew was great. Seats were still not that comfortable.

they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation

The seats were extremely hard and uncomfortable, even for a budget airline.

Boarding was very well executed. Got my bag right away.

Book cheap flights from Colorado to District of Columbia

Recent round-trip flight deals

8/22Fri
1 stopFrontier
16h 50mDEN-IAD
8/25Mon
1 stopFrontier
19h 07mIAD-DEN
$102
8/23Sat
1 stopFrontier
11h 33mDEN-IAD
8/25Mon
1 stopFrontier
17h 40mIAD-DEN
$106
8/14Thu
nonstopUnited Airlines
3h 26mDEN-IAD
8/18Mon
nonstopUnited Airlines
3h 51mIAD-DEN
$177
9/17Wed
1 stopUnited Airlines
6h 23mCOS-DCA
10/8Wed
1 stopUnited Airlines
8h 11mDCA-COS
$237
8/12Tue
1 stopDelta
6h 31mCOS-IAD
8/20Wed
1 stopDelta
5h 56mIAD-COS
$237
8/12Tue
1 stopDelta
8h 30mCOS-IAD
8/20Wed
2 stopsDelta
8h 12mIAD-COS
$242
9/8Mon
1 stopSouthwest
7h 20mCOS-IAD
9/13Sat
1 stopSouthwest
5h 20mIAD-COS
$244
9/17Wed
2 stopsSouthwest
9h 30mCOS-DCA
10/8Wed
2 stopsSouthwest
9h 05mDCA-COS
$247
8/13Wed
2 stopsAmerican Airlines
8h 16mCOS-IAD
8/20Wed
2 stopsAmerican Airlines
12h 36mIAD-COS
$249
9/8Mon
1 stopAmerican Airlines
8h 48mCOS-IAD
9/13Sat
2 stopsAmerican Airlines
11h 20mIAD-COS
$275

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Recent one-way flight deals

9/6Sat
1 stopFrontier
17h 18mDEN-IAD
$55
9/16Tue
nonstopFrontier
3h 29mDEN-DCA
$58
8/20Wed
nonstopSouthwest
3h 20mDEN-IAD
$89
8/11Mon
1 stopSouthwest
4h 30mDEN-DCA
$94
8/5Tue
nonstopUnited Airlines
3h 25mDEN-DCA
$98
11/18Tue
1 stopAmerican Airlines
6h 53mDEN-IAD
$99
11/18Tue
1 stopAmerican Airlines
6h 27mDEN-DCA
$99
8/29Fri
nonstopUnited Airlines
3h 22mDEN-IAD
$100
8/8Fri
1 stopDelta
6h 57mDEN-IAD
$119
7/29Tue
1 stopDelta
5h 41mDEN-DCA
$119

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Last minute flights from Colorado to District of Columbia

Last minute flight, train and bus deals

7/4Fri
multi-stopFrontier
12h 17mDEN-IAD
7/12Sat
multi-stopFrontier
14h 56mIAD-DEN
$153
7/4Fri
multi-stopFrontier
14h 57mDEN-IAD
8/3Sun
multi-stopFrontier
16h 50mIAD-DEN
$161
7/3Thu
multi-stopFrontier
21h 30mDEN-IAD
8/3Sun
multi-stopFrontier
14h 16mIAD-DEN
$163
7/6Sun
multi-stopAmerican Airlines
7h 54mDEN-DCA
7/19Sat
multi-stopAmerican Airlines
8h 30mDCA-DEN
$492
7/2Wed
multi-stopAmerican Airlines
6h 18mGJT-DCA
7/9Wed
multi-stopAmerican Airlines
6h 51mDCA-GJT
$514
7/6Sun
multi-stopSouthwest
5h 35mDEN-DCA
8/14Thu
multi-stopSouthwest
7h 25mDCA-DEN
$523
7/6Sun
multi-stopSouthwest
7h 15mDEN-DCA
8/14Thu
multi-stopSouthwest
7h 00mDCA-DEN
$528
7/5Sat
multi-stopUnited Airlines
7h 16mDEN-DCA
7/30Wed
multi-stopUnited Airlines
6h 10mDCA-DEN
$569
7/2Wed
multi-stopDelta
6h 46mCOS-IAD
7/7Mon
multi-stopDelta
11h 54mIAD-COS
$694
7/2Wed
multi-stopDelta
13h 04mCOS-IAD
7/7Mon
multi-stopDelta
11h 54mIAD-COS
$699

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Everything you need to know for your flight to District of Columbia

Cabin class types available on flights to Colorado

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

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