COS - IAD

$118 Find Cheap Flights from Colorado Springs to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Colorado Springs to Dulles Intl departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Colorado Springs to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Colorado Springs to Washington, D.C., as well as popular online travel agencies
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Flights Deals

Cheap Flights from Colorado Springs to Dulles Intl (COS-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Colorado Springs to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Colorado Springs to Dulles Intl

Tue, Aug 19 - Tue, Aug 26
Delta Logo
6:00 am - 4:30 pmCOS-IAD
8h 30m1 stop
Delta Logo
7:22 am - 12:12 pmIAD-COS
6h 50m1 stop
$237Delta
Find Deal
Tue, Aug 19 - Tue, Aug 26
Delta Logo
1:10 pm - 11:21 pmCOS-IAD
8h 11m1 stop
Delta Logo
6:00 am - 5:15 pmIAD-COS
13h 15m2 stops
$242Delta
Find Deal
Tue, Aug 19 - Tue, Aug 26
American Airlines Logo
10:52 am - 10:56 pmCOS-IAD
10h 04m2 stops
American Airlines Logo
7:44 am - 4:28 pmIAD-COS
10h 44m2 stops
$247American Airlines
Find Deal
Mon, Aug 18 - Mon, Aug 25
Delta Logo
6:00 am - 4:30 pmCOS-IAD
8h 30m1 stop
Delta Logo
6:00 am - 12:12 pmIAD-COS
8h 12m1 stop
$259Delta
Find Deal
Thu, Aug 21 - Sun, Aug 24
American Airlines Logo
10:52 am - 11:59 pmCOS-IAD
11h 07m2 stops
American Airlines Logo
6:04 pm - 11:44 pmIAD-COS
7h 40m1 stop
$268American Airlines
Find Deal
Wed, Jul 9 - Wed, Jul 16
United Airlines Logo
3:35 pm - 11:10 pmCOS-IAD
5h 35m1 stop
United Airlines Logo
8:06 pm - 11:52 pmIAD-COS
5h 46m1 stop
$289United Airlines
Find Deal
Wed, Jul 30 - Sun, Aug 3
United Airlines Logo
3:35 pm - 11:10 pmCOS-IAD
5h 35m1 stop
United Airlines Logo
6:35 am - 11:08 amIAD-COS
6h 33m1 stop
$306United Airlines
Find Deal
Tue, Jul 1 - Thu, Jul 3
Southwest Logo
11:20 am - 6:25 pmCOS-IAD
5h 05m1 stop
Southwest Logo
7:50 pm - 11:15 pmIAD-COS
5h 25m1 stop
$388Southwest
Find Deal
Thu, Jun 26 - Mon, Jul 7
Southwest Logo
11:30 am - 7:05 pmCOS-IAD
5h 35m1 stop
Southwest Logo
7:50 pm - 11:15 pmIAD-COS
5h 25m1 stop
$403Southwest
Find Deal
Fri, Jun 27 - Sun, Jul 6
 Logo
5:43 pm - 9:37 pmCOS-IAD
25h 54m3 stops
 Logo
12:34 pm - 4:19 pmIAD-COS
29h 45m3 stops
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KAYAK's insights & trends for Colorado Springs to Dulles Intl flights

Get data-powered insights and trends into flights from Colorado Springs to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Colorado Springs to Washington Dulles Airport?

The average price of all round-trip flights from Colorado Springs to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Colorado Springs to Washington Dulles Airport, you should consider leaving on a Wednesday and avoid Mondays if you are looking for the best rates. For your return to Colorado Springs, you’ll find the best rates on Saturdays and the most expensive ones on Fridays.

What is the cheapest month to fly from Colorado Springs to Washington, D.C. Dulles Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Colorado Springs to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Colorado Springs to Washington, D.C. Dulles Intl Airport is February, where tickets cost $288 (return) on average. On the other hand, the most expensive months are October and July, where the average cost of round-trip tickets is $528 and $520 respectively.

Good to know

Low seasonJanuary
High seasonAugust
Cheapest flight$118
Best time to beat the crowds but there is an average 24% increase in price.
Most popular time to fly and prices are also 22% lower on average.
Flight from Colorado Springs to Washington Dulles Airport

When to book flights from Colorado Springs to Dulles Intl

Are your dates flexible? Find out the best times to travel from Colorado Springs to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Colorado Springs to Washington Dulles Airport flights

  • What is the cheapest flight from Colorado Springs to Washington, D.C. Dulles Intl Airport?

    In the last 3 days, the lowest price for a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport was $118 for a one-way ticket and $237 for a round-trip.

  • Do I need a passport to fly between Colorado Springs and Washington Dulles Airport?

    No

  • Which airports will I be using when flying from Colorado Springs to Washington Dulles Airport?

    On your way to Washington Dulles Airport, you’ll fly out from Colorado Springs. You’ll be landing at Washington, D.C. Dulles Intl.

  • Which aircraft models fly most regularly from Colorado Springs to Washington Dulles Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Colorado Springs to Washington Dulles Airport?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Colorado Springs and Washington Dulles Airport, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Colorado Springs to Washington, D.C., Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Colorado Springs to Washington, D.C. are Southwest and Delta. With an average price for the route of $418 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $288 and an overall rating of 8.0.

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

    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 Springs to Washington Dulles Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Colorado Springs 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 Springs to Washington Dulles Airport?

    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 to Washington Dulles Airport with an airline and back to Colorado Springs with another airline. Booking your flights between Colorado Springs and IAD can sometimes prove cheaper using this method.

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

    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 to Washington Dulles Airport from Colorado Springs up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 4 airlines serving from Colorado Springs to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Colorado Springs to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Colorado Springs to Dulles Intl? 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 4287 reviews
7.6Entertainment
8.2Boarding
7.1Food
8.6Crew
8.0Comfort
Airline reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

6.0 GoodDavid, Jun 2025BWI - COS
Read more Southwest reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

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

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

I am very bothered by the events today. I can't believe the flight attendants allowed someone to take my seat and made me move. It was embarrassing. I was in the right. The lady just didn't want move. I can't believe delta would allow this to stand and disrespect my rights as a passenger. The lady complained about her leg and that she couldn't move. Firstly somehow she was able to make it to row 24. Not sure how much her leg could have hurt. Secondly, I'm in plenty of pain myself. I just finished chemotherapy a several weeks ago. My body is constantly sore. Yet deltas flight attendants didn't appropriately protect my rights. In the end they found me a seat on the plane but I want to understand how delta can operate this way. They in essence allowed a bully to get their way.

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

Very nice and clean plane. Transit time between flights was tight though

Mostly the experience was good except for the flight changes made by UA which meant longer layover in DC

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.

Change cabin crew assisting business class. Not taking care, ignoring requests and calls. Never had such an experience in business class.

United left one of our bags back in SFO but that’s not my real complaint. The complaint is how it all went down. So we checked in the day before online and were told we could use the quick drop for luggage. So the next day I used baggage quick drop curbside at SFO. The agent mistakenly didn't tag my bag as he put my bag on the conveyor belt untagged. We immediately alerted him he had not tagged the bag. I walked with him to the baggage service office to find my bag and tag it. We waited outside the office for 10 mins. He came out and said everything was ok and the bag was going to be tagged and on my flight. We received a text that one of our bags was on the flight but the other was not. I alerted my first class flight attendant immediately upon boarding the flight. She was helpful and said she’d get it sorted out right away. She called over the gate agent. The gate agent used my bag number and looked over information on her device. She said my bag was on the flight. The flight attendant was standing with her, looking at the device, and also said “yep it’s on the flight”. During the flight the flight attendant made reference to how reassuring it must feel knowing the bag was on the flight. Upon arriving to IAD we received a text that my bag was not on my flight. The text said my bag would arrive to my final destination LIS 24 hrs late. I understand that mistakes happen. I was totally ok with my bag mistakenly not getting tagged at the quick drop. I was fine with walking down to baggage services to tag my bag. But, what I am not ok with is that the United staff said they fixed the mistake two different times, assuring me twice that my bag would be/was on the plane…and it wasn’t. I expected better attention by the employees, for them to do what they said they were going to do. We also spent extra money to upgrade our seats to first class, including the entire return leg from Lisbon to San Francisco because we wanted a smoother and more relaxing travel experience. Our money was not well spent. We will not be using United for travel going forward.

The flight was delayed, it took longer than anticipated because of weather, and they broke my luggage.

Horrifying! And I am almost 2 million miles with United. Late by 3 1/2 hours. Worst: after two hours on the plane waiting, they decided that one of the tires had been damaged and then decided to change it. Another hour and a half to change the tire!!!!! NO EXCUSE FOR THIS. The crew didn't even offer a glass of water until we had been on the plane for FIVE hours. This is the worst airline in the world. I'm simply stuck because they fly on the only routes I need.

Gate got changed about 4 times. Very confusing and very crowded. If you don’t have wifi to help get updates, you can be in deep trouble.

Attendants zipped through cabin so fast hardly anyone got the water they told us we could have in the short flight. Nothing else was offered.

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.

It was good. It’s been a long time since my wife and I fly any where and things have changed. Our trip was to see our new grandson. We fly economy and that was not good for my bad back. It was a quick flight but uncomfortable.

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