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Dulles Intl

$62+ Cheap flights from Missouri to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IAD
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap flight deals from Missouri to Dulles Intl

Cheapest flights from Missouri to Dulles Intl
Explore the most affordable flight options available from Missouri to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

This Expedia deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1311:00 am
MCI
-
IAD
1 stop5h 13m
Frontier
Mon 3/96:20 am
IAD
-
MCI
1 stop11h 03m
Frontier
Deal found 2/1$224
This Expedia deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/65:08 pm
MCI
-
IAD
1 stop6h 23m
Frontier
Wed 3/116:20 am
IAD
-
MCI
1 stop5h 38m
Frontier
Deal found 2/2$229
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/44:24 pm
MCI
-
IAD
1 stop16h 01m
Multiple Airlines
Sat 3/75:05 am
IAD
-
MCI
2 stops10h 50m
Multiple Airlines
Deal found 2/3$234
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:41 pm
MCI
-
IAD
2 stops12h 49m
Frontier
Sun 3/15:39 pm
IAD
-
MCI
1 stop17h 14m
Frontier
Deal found 2/3$237
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/184:24 pm
MCI
-
IAD
1 stop16h 01m
Multiple Airlines
Sat 2/2110:29 am
IAD
-
MCI
1 stop24h 00m
Multiple Airlines
Deal found 2/3$245
This Kiwi.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:24 pm
MCI
-
IAD
2 stops39h 40m
Multiple Airlines
Tue 3/107:00 am
IAD
-
MCI
1 stop28h 58m
Multiple Airlines
Deal found 2/1$247
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/278:33 pm
MCI
-
IAD
2 stops12h 01m
Frontier
Sun 3/15:39 pm
IAD
-
MCI
1 stop17h 14m
Frontier
Deal found 2/2$251
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/1510:14 am
MCI
-
IAD
1 stop5h 30m
Multiple Airlines
Sun 3/88:09 am
IAD
-
MCI
2 stops27h 21m
Multiple Airlines
Deal found 2/3$254
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:15 am
COU
-
IAD
1 stop5h 15m
United Airlines
Wed 3/118:30 am
IAD
-
COU
1 stop6h 36m
United Airlines
Deal found 2/3$258
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/65:08 pm
MCI
-
IAD
1 stop6h 23m
Multiple Airlines
Sun 3/88:09 am
IAD
-
MCI
1 stop8h 20m
Multiple Airlines
Deal found 2/3$258
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/65:08 pm
MCI
-
IAD
1 stop6h 23m
Multiple Airlines
Sun 3/158:15 am
IAD
-
MCI
1 stop16h 38m
Multiple Airlines
Deal found 2/3$259
This Priceline deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:23 pm
MCI
-
IAD
1 stop5h 08m
Frontier
Wed 3/256:20 am
IAD
-
MCI
1 stop5h 38m
Frontier
Deal found 2/1$260

Find flight deals from Missouri to Dulles Intl

Keep the following information in mind while searching for Missouri to Dulles Intl flight deals. Data was last updated February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$229
(Expedia)

One-way from

$62
(Trip.com)

Popular in

January

Cheapest in

August

Average price

$304

Good round-trip deal

$471 or less

Good one-way deal

$256 or less
Provider with most accurate pricing for Lambert-St Louis-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Washington, D.C. (WAS) flights.
Search Deals
From Missouri to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Missouri to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Missouri to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Missouri to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 4, 2026.
Use the filters below to find and compare flights from Missouri to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Missouri

Fly to

Dulles Intl

Route

Depart

Return

Price

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Wed 4/15

3:23 pm-9:04 pm

1 stop4h 41m

Washington, D.C. Dulles Intl

Sat 4/18

5:21 pm-9:56 pm

1 stop5h 35m

$258

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Fri 5/8

11:30 am-5:28 pm

1 stop4h 58m

Washington, D.C. Dulles Intl

Sun 5/10

6:15 am-10:57 am

1 stop5h 42m

$258

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Wed 3/4

11:15 am-5:30 pm

1 stop5h 15m

Washington, D.C. Dulles Intl

Wed 3/11

8:30 am-2:06 pm

1 stop6h 36m

$258

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Tue 2/17

8:00 am-4:05 pm

1 stop7h 05m

Washington, D.C. Dulles Intl

Sat 2/21

8:15 am-2:28 pm

1 stop7h 13m

$268

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

Wed 2/25

9:55 am-4:34 pm

1 stop5h 39m

Washington, D.C. Dulles Intl

Sat 2/28

4:46 pm-9:59 pm

1 stop6h 13m

$269

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

Tue 3/3

5:32 pm-12:21 am

1 stop5h 49m

Washington, D.C. Dulles Intl

Tue 3/10

7:18 am-11:08 am

1 stop4h 50m

$269

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

Tue 2/24

4:32 pm-10:53 pm

1 stop5h 21m

Washington, D.C. Dulles Intl

Sat 2/28

4:46 pm-9:59 pm

1 stop6h 13m

$269

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

Wed 2/18

1:15 pm-8:30 pm

1 stop6h 15m

Washington, D.C. Dulles Intl

Wed 3/18

5:00 am-11:18 am

1 stop7h 18m

$274

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

Thu 2/19

5:32 pm-12:21 am

1 stop5h 49m

Washington, D.C. Dulles Intl

Sat 2/21

6:00 am-12:09 pm

1 stop7h 09m

$279

JoplinWashington, D.C.

JLN - IAD

JLNIAD

Joplin

Fri 2/27

8:54 am-5:30 pm

1 stop7h 36m

Washington, D.C. Dulles Intl

Sat 2/28

1:20 pm-5:38 pm

1 stop5h 18m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 60 results
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Best time to book a flight from Missouri to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Missouri with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Missouri to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Missouri to Washington, D.C. Dulles Intl Airport?

Currently, December is the cheapest month in which you can book a flight from Missouri to Washington, D.C. Dulles Intl Airport (average of $98). Flying from Missouri to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $242). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MO to IAD?

Find hourly flight availability from Missouri to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 4, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Washington, D.C. Dulles Intl Airport as you normally would.

Weekly flight availability from Missouri to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Missouri to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 4, 2026.

The most flights from USMO to IAD are scheduled on a Monday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Missouri to Washington, D.C. Dulles Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from Missouri to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Missouri to Washington, D.C. Dulles Intl Airport?

    There are many flights that can get you from Missouri to Washington, D.C. Dulles Intl Airport in 4h 41m. Fly via United Airlines, American Airlines, or Delta to get the fastest option. Missouri and Washington, D.C. Dulles Intl Airport are separated by a distance of 793 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Missouri to Washington, D.C. Dulles Intl Airport?

    When deciding which route to take from Missouri to Washington, D.C. Dulles Intl Airport consider Lambert-St Louis - Washington, D.C. Dulles Intl, Kansas City - Washington, D.C. Dulles Intl or Springfield-Branson - Washington, D.C. Dulles Intl as they are the most popular.

  • What are the most reliable airlines from Missouri to Washington, D.C. Dulles Intl Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Missouri to Washington, D.C. Dulles Intl Airport on time: Avianca (74%), Copa Airlines (74%), GoJet (69%).

  • What are the cheapest flights from Missouri to Washington, D.C. Dulles Intl Airport?

    On average you can expect to pay $618 for a flight from Missouri to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $154 while the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl) is currently priced at $277.

  • Can I find deals for flights from Missouri to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Missouri to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Dulles Intl.

  • Can I find deals for business class flights from Missouri to Dulles Intl?

    Yes. Cheapflights offers flight deals from Missouri to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Missouri to Washington, D.C. Dulles Intl Airport?

    Currently, December is the cheapest month in which you can book a flight from Missouri to Washington, D.C. Dulles Intl Airport (average of $98). Flying from Missouri to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $242). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

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Alternative routes for Missouri to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Baltimore flights
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Baltimore flights
Atlanta to Dulles Intl flights
Los Angeles to Reagan-National flights
Boston to Dulles Intl flights
Atlanta to Baltimore flights
Dallas/Fort Worth to Reagan-National flights
Fort Lauderdale to Dulles Intl flights
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Los Angeles to Baltimore flights
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O'Hare Intl to Reagan-National flights
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O'Hare Intl to Dulles Intl flights
O'Hare Intl to Baltimore flights
Miami to Dulles Intl flights
Seattle to Dulles Intl flights
Atlanta to Reagan-National flights
Hobby to Reagan-National flights
San Francisco to Reagan-National flights
Orlando to Reagan-National flights
Hobby to Dulles Intl flights
Orlando to Baltimore flights
San Francisco to Dulles Intl flights
Fort Lauderdale to Baltimore flights
Seattle to Baltimore flights
George Bush Intcntl to Reagan-National flights
San Francisco to Baltimore flights
George Bush Intcntl to Dulles Intl flights
Denver to Baltimore flights
Hobby to Baltimore flights
Tampa to Reagan-National flights
Miami to Baltimore flights
Denver to Dulles Intl flights
Detroit to Dulles Intl flights
Tampa to Dulles Intl flights
Austin to Dulles Intl flights
Fort Lauderdale to Reagan-National flights
LaGuardia to Reagan-National flights
Detroit to Baltimore flights
Sky Harbor Intl to Dulles Intl flights
Denver to Reagan-National flights
Charlotte to Dulles Intl flights
Minneapolis to Reagan-National flights
Minneapolis to Dulles Intl flights
Minneapolis to Baltimore flights
Charlotte to Baltimore flights
Miami to Reagan-National flights

Top 4 airlines flying from Missouri to Dulles Intl

Discover the top 4 airlines that operate flights from Missouri to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$172FlexibilityNo cancel feeOn-time62%
DeltaCheapest$99Average$337FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$253Average$453FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$257Average$377FlexibilityNo cancel feeOn-time71%

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