COS - IAD

$176 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 4/21. 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
$351
Overall average: $387
United Airlines
Tue 4/14Tue 4/21
COS - IAD • 1 stop
Cheapest one-way
$176
Typical prices: $158-$209
United Airlines
Tue 4/21
COS - IAD • 1 stop
Top airlines
Cheapest • from $351 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Colorado Springs and Dulles Intl. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $236 (round-trip)
Shortest trip • 5h 30m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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, Apr 14 - Tue, Apr 21
United Airlines Logo
3:26 pm - 11:34 pm
COS
-
IAD
6h 08m
1 stop
United Airlines Logo
6:00 am - 11:24 am
IAD
-
COS
7h 24m
1 stop
$351United Airlines
Tue, Apr 14 - Tue, Apr 21
Southwest Logo
9:10 am - 11:40 pm
COS
-
IAD
12h 30m
2 stops
Southwest Logo
4:30 pm - 9:20 pm
IAD
-
COS
6h 50m
1 stop
$356Southwest
Thu, Apr 9 - Tue, Apr 14
United Airlines Logo
1:33 pm - 9:25 pm
COS
-
IAD
5h 52m
1 stop
United Airlines Logo
6:15 am - 10:57 am
IAD
-
COS
6h 42m
1 stop
$359United Airlines
Tue, May 12 - Wed, May 20
Southwest Logo
4:05 pm - 11:40 pm
COS
-
IAD
5h 35m
1 stop
Southwest Logo
6:20 am - 9:45 am
IAD
-
COS
5h 25m
1 stop
$361Southwest
Thu, Apr 9 - Tue, Apr 14
Southwest Logo
5:20 pm - 12:20 am
COS
-
IAD
5h 00m
1 stop
Southwest Logo
6:20 am - 4:10 pm
IAD
-
COS
11h 50m
2 stops
$364Southwest
Tue, May 12 - Wed, May 20
Southwest Logo
9:10 am - 11:40 pm
COS
-
IAD
12h 30m
2 stops
Southwest Logo
6:20 am - 9:45 am
IAD
-
COS
5h 25m
1 stop
$366Southwest
Wed, Apr 15 - Mon, Apr 20
Delta Logo
1:14 pm - 8:52 pm
COS
-
IAD
5h 38m
1 stop
Delta Logo
3:00 pm - 8:20 pm
IAD
-
COS
7h 20m
1 stop
$367Delta
Wed, Apr 1 - Tue, Apr 7
American Airlines Logo
7:37 am - 4:50 pm
COS
-
IAD
7h 13m
1 stop
American Airlines Logo
5:59 pm - 10:25 pm
IAD
-
COS
6h 26m
1 stop
$371American Airlines
Tue, May 5 - Tue, May 12
Delta Logo
1:14 pm - 8:52 pm
COS
-
IAD
5h 38m
1 stop
Delta Logo
11:15 am - 9:27 pm
IAD
-
COS
12h 12m
2 stops
$372Delta
Wed, Apr 15 - Mon, Apr 20
American Airlines Logo
1:39 pm - 11:59 pm
COS
-
IAD
8h 20m
2 stops
American Airlines Logo
5:59 pm - 11:32 pm
IAD
-
COS
7h 33m
1 stop
$384American 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 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 August, where tickets cost $316 (return) on average. On the other hand, the most expensive months are January and February, where the average cost of round-trip tickets is $647 and $597 respectively.

Good to know

Low seasonJanuary
Cheapest flight$176
Best time to beat the crowds but there is an average 46% increase in price.
Most popular time to fly and prices are also 29% 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 $176 for a one-way ticket and $351 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 $363 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 4318 reviews
8.6Crew
7.0Food
7.5Entertainment
8.1Boarding
8.0Comfort
Airline reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

4.0 OkayKenny, Mar 2026
TPA - BWI
Read more Southwest reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Fine not above and beyond as I had a connection that was delayed due to maintenance

Bad food, bad service, cold cabin with no additional blankets when asked for (they told me they don’t provide additional blankets). I’m a frequent traveler and this is one of the worst companies I traveled with (by the way I thought that I booked my ticket with Lufthansa but I didn’t see that the flights were handled by United).

Great other than a couple very drunk guys that for a while kept bumping my seat from behind. The staff did their best to control them. Even refused serving them alcohol and allowed the gal sitting next to them to move.

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The seats were comfortable and we had leg room. Great entertainment.

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

Information on your arrival and departure airports