COS - IAD

$145 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 1/12. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$323
Overall average: $574
Delta
Tue 1/13Sat 1/17
COS - IAD • 1 stop
Cheapest one-way
$145
Typical prices: $198-$260
Multiple Airlines
Mon 1/12
COS - IAD • 3 stops
When to travel
February
Cheapest • 28% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Flight Deals
Booking Insights
Flight 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, Jan 13 - Sat, Jan 17
Delta Logo
12:00 pm - 11:48 pm
COS
-
IAD
9h 48m1 stop
Delta Logo
6:20 am - 12:22 pm
IAD
-
COS
8h 02m1 stop
$323Delta
Tue, Jan 13 - Sat, Jan 17
Delta Logo
7:59 am - 11:06 pm
COS
-
IAD
13h 07m2 stops
Delta Logo
6:20 am - 12:22 pm
IAD
-
COS
8h 02m1 stop
$328Delta
Tue, Jan 13 - Tue, Jan 20
Delta Logo
7:59 am - 11:06 pm
COS
-
IAD
13h 07m2 stops
Delta Logo
12:32 pm - 10:23 pm
IAD
-
COS
11h 51m2 stops
$333Delta
Wed, Jan 7 - Wed, Jan 14
Delta Logo
1:21 pm - 11:37 pm
COS
-
IAD
8h 16m1 stop
Delta Logo
6:20 am - 12:22 pm
IAD
-
COS
8h 02m1 stop
$351Delta
Tue, Feb 10 - Thu, Feb 19
American Airlines Logo
6:12 am - 4:31 pm
COS
-
IAD
8h 19m1 stop
American Airlines Logo
6:00 am - 12:50 pm
IAD
-
COS
8h 50m1 stop
$364American Airlines
Tue, Jan 27 - Fri, Jan 30
United Airlines Logo
11:33 am - 9:07 pm
COS
-
IAD
7h 34m1 stop
United Airlines Logo
10:02 am - 2:34 pm
IAD
-
COS
6h 32m1 stop
$369United Airlines
Tue, Jan 13 - Sat, Jan 17
American Airlines Logo
6:12 am - 5:16 pm
COS
-
IAD
9h 04m2 stops
American Airlines Logo
7:01 am - 5:41 pm
IAD
-
COS
12h 40m2 stops
$373American Airlines
Tue, Jan 27 - Fri, Jan 30
American Airlines Logo
8:16 am - 4:31 pm
COS
-
IAD
6h 15m1 stop
American Airlines Logo
7:01 am - 5:41 pm
IAD
-
COS
12h 40m2 stops
$374American Airlines
Sat, Jan 10 - Thu, Jan 15
Southwest Logo
3:20 pm - 10:10 pm
COS
-
IAD
4h 50m1 stop
Southwest Logo
5:30 am - 11:20 am
IAD
-
COS
7h 50m1 stop
$377Southwest
Tue, Jan 27 - Fri, Jan 30
American Airlines Logo
8:16 am - 11:12 pm
COS
-
IAD
12h 56m2 stops
American Airlines Logo
7:01 am - 5:41 pm
IAD
-
COS
12h 40m2 stops
$379American Airlines
Booking Insights

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 December and January, where the average cost of round-trip tickets is $576 and $574 respectively.

Good to know

Low seasonJanuary
Cheapest flight$145
Best time to beat the crowds but there is an average 44% increase in price.
Most popular time to fly and prices are also 21% 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 $145 for a one-way ticket and $323 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?

    SkyTeam, and Star Alliance 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 $367 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 $262 and an overall rating of 7.9.

  • 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.

Reviews of the top 3 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 4254 reviews
8.1Boarding
8.0Comfort
7.5Entertainment
8.6Crew
7.0Food
Airline reviews

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

8.0 ExcellentRussell, Dec 2025
SAN - OAK
Read more Southwest reviews

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

The food is terrible. The same pasta or chicken with bad taste and presentation

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Great crew, excellent landing, good food. Over all great experience. Thank you!

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

Flight was delayed for 5 hours because crew didn’t have enough time to rest - this seems like it could have been avoided with better scheduling. Food was not good.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

Everything you need to know for your flight from Colorado Springs to Dulles Intl

Information on your arrival and departure airports