IAD

$81 Find Cheap Flights from Colorado 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 to Dulles Intl departing on 5/13. 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

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Flight Deals

Cheap Flights from Colorado to Dulles Intl

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Colorado 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 to Dulles Intl

wt., kwi 14 - wt., kwi 21
Frontier Logo
11:59 pm - 12:36 am
DEN
-
IAD
22h 37m
1 stop
Frontier Logo
8:20 am - 10:29 pm
IAD
-
DEN
16h 09m
1 stop
$134Frontier
wt., kwi 14 - sob., kwi 18
Frontier Logo
11:59 pm - 12:36 am
DEN
-
IAD
22h 37m
1 stop
Frontier Logo
10:51 am - 10:29 pm
IAD
-
DEN
13h 38m
1 stop
$146Frontier
wt., sie 25 - śr., wrz 9
United Airlines Logo
3:11 pm - 12:40 am
GJT
-
IAD
7h 29m
1 stop
United Airlines Logo
6:30 am - 10:44 am
IAD
-
GJT
6h 14m
1 stop
$339United Airlines
czw., mar 26 - ndz., mar 29
United Airlines Logo
1:33 pm - 11:51 pm
MTJ
-
IAD
8h 18m
1 stop
United Airlines Logo
6:00 am - 2:02 pm
IAD
-
MTJ
10h 02m
1 stop
$339United Airlines
śr., kwi 15 - pon., kwi 20
Delta Logo
7:59 am - 11:55 pm
COS
-
IAD
13h 56m
2 stops
Delta Logo
3:00 pm - 8:20 pm
IAD
-
COS
7h 20m
1 stop
$341Delta
wt., sie 25 - śr., wrz 9
American Airlines Logo
12:27 pm - 10:44 pm
GJT
-
IAD
8h 17m
1 stop
American Airlines Logo
12:25 pm - 12:16 am
IAD
-
GJT
13h 51m
2 stops
$344American Airlines
wt., sie 25 - śr., wrz 9
American Airlines Logo
6:58 pm - 8:42 am
GJT
-
IAD
11h 44m
2 stops
American Airlines Logo
12:25 pm - 12:16 am
IAD
-
GJT
13h 51m
2 stops
$349American Airlines
wt., kwi 14 - wt., kwi 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
śr., kwi 15 - pon., kwi 20
Southwest Logo
4:05 pm - 11:40 pm
COS
-
IAD
5h 35m
1 stop
Southwest Logo
5:55 am - 9:20 am
IAD
-
COS
5h 25m
1 stop
$359Southwest
sob., maj 9 - śr., maj 13
Delta Logo
6:00 am - 2:13 pm
COS
-
IAD
6h 13m
1 stop
Delta Logo
3:08 pm - 9:27 pm
IAD
-
COS
8h 19m
1 stop
$367Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$81
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Denver to Washington Dulles Airport

Flights from Colorado to Dulles Intl: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Colorado to Dulles Intl 
Learn how KAYAK collects reviews and tips from users.
NesrinFlew with Southwest
DEN
-
IAD
Feb 2026
Get a seat in the very front if you can, otherwise, it is a very slow process.
JasonFlew with United Airlines
DEN
-
IAD
Nov 2024
DIA is a large airport. Get there early.
BindulFlew with United Airlines
DEN
-
IAD
Feb 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 Colorado to Washington Dulles Airport flights

  • How does KAYAK find such low prices on flights from Colorado 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 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 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 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 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Dulles Intl?

Book flights to Dulles Intl if you plan to visit one of these locations
Winchester
Linthicum Heights
Hanover
Springfield
Gaithersburg
Towson
Oxon Hill
Martinsburg
Owings Mills
Charles Town
Glen Burnie
Greenbelt
Ellicott City
Edgewood
Colonial Beach
Pikesville
Lutherville Timonium
Camp Springs
Hunt Valley
Westminster

Everything you need to know for your flight to Dulles Intl

Information on your arrival and departure airports

Washington Dulles Airport (IAD)