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Dulles Intl

$68+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — IAD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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 12/246:35 pmSTL - IAD
1 stop4h 40mUnited Airlines
Wed 12/318:35 amIAD - STL
Nonstop2h 33mUnited Airlines
Deal found 12/16$237
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/2510:05 amMCI - IAD
1 stop6h 25mUnited Airlines
Wed 12/3112:57 pmIAD - MCI
Nonstop3h 03mUnited Airlines
Deal found 12/16$241
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:12 pmMCI - IAD
1 stop5h 40mDelta
Thu 1/16:00 amIAD - MCI
1 stop6h 32mDelta
Deal found 12/16$251
This Trip.com deal was found by Cheapflights users on 12/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:42 amSTL - IAD
1 stop6h 34mFrontier
Mon 12/299:58 pmIAD - STL
1 stop25h 35mFrontier
Deal found 12/16$258
This Booking.com deal was found by Cheapflights users on 12/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/199:07 amSTL - IAD
1 stop22h 44mFrontier
Tue 12/309:58 pmIAD - STL
1 stop25h 35mFrontier
Deal found 12/16$261
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/306:34 pmCOU - IAD
1 stop4h 41mUnited Airlines
Sat 1/38:15 amIAD - COU
1 stop7h 20mUnited Airlines
Deal found 12/15$268
This Priceline deal was found by Cheapflights users on 12/17. 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.
Thu 12/1810:42 amSTL - IAD
1 stop6h 34mFrontier
Sun 1/116:00 amIAD - STL
1 stop9h 48mFrontier
Deal found 12/17$277
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Thu 12/2510:42 amSTL - IAD
1 stop6h 34mFrontier
Tue 12/309:58 pmIAD - STL
1 stop25h 35mFrontier
Deal found 12/16$283
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/258:15 amSTL - IAD
Nonstop2h 09mUnited Airlines
Wed 12/315:50 pmIAD - STL
Nonstop2h 32mUnited Airlines
Deal found 12/16$297
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/245:46 pmMCI - IAD
Nonstop2h 34mUnited Airlines
Wed 12/316:30 pmIAD - MCI
Nonstop3h 01mUnited Airlines
Deal found 12/16$301
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/244:27 pmSTL - IAD
2 stops18h 11mFrontier
Wed 12/317:01 pmIAD - STL
1 stop15h 39mFrontier
Deal found 12/16$313
This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:25 pmSGF - IAD
1 stop4h 39mAmerican Airlines
Mon 1/51:57 pmIAD - SGF
1 stop5h 02mAmerican Airlines
Deal found 12/17$324

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 December 18, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$204
(Kiwi.com)

One-way from

$68
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$335

Good round-trip deal

$562 or less

Good one-way deal

$238 or less
Provider with most accurate pricing for Lambert-St Louis-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Washington, D.C. (WAS) flights.
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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. 10% potential increase in price ($33 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 December 2025
Search Deals
Price to beat on a round-trip flight from Missouri to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Missouri to Washington, D.C. Dulles Intl.
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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 December 18, 2025.
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

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 1/17

6:30 am-11:46 am

1 stop4h 16m

Washington, D.C. Dulles Intl

Sat 1/17

5:38 pm-11:59 pm

1 stop7h 21m

$242

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Sat 2/14

10:24 am-4:05 pm

1 stop4h 41m

Washington, D.C. Dulles Intl

Wed 2/18

8:15 am-2:24 pm

1 stop7h 09m

$251

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Wed 1/14

11:17 am-5:35 pm

1 stop5h 18m

Washington, D.C. Dulles Intl

Wed 1/21

5:17 pm-9:37 pm

1 stop5h 20m

$258

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Thu 4/9

11:25 am-7:23 pm

1 stop6h 58m

Washington, D.C. Dulles Intl

Wed 4/15

6:15 am-10:29 am

1 stop5h 14m

$258

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Sat 1/10

3:24 pm-9:17 pm

1 stop4h 53m

Washington, D.C. Dulles Intl

Sat 1/17

1:05 pm-3:10 pm

Nonstop3h 05m

$260

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Sat 1/17

12:35 pm-4:09 pm

Nonstop2h 34m

Washington, D.C. Dulles Intl

Mon 1/19

1:05 pm-3:10 pm

Nonstop3h 05m

$262

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Tue 12/30

6:34 pm-12:15 am

1 stop4h 41m

Washington, D.C. Dulles Intl

Sat 1/3

8:15 am-2:35 pm

1 stop7h 20m

$268

ColumbiaWashington, D.C.

COU - IAD

COUIAD

Columbia Regional

Thu 1/1

6:34 pm-12:15 am

1 stop4h 41m

Washington, D.C. Dulles Intl

Mon 1/5

1:00 pm-5:25 pm

1 stop5h 25m

$268

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 1/31

8:30 am-11:40 am

Nonstop2h 10m

Washington, D.C. Dulles Intl

Mon 2/2

5:17 pm-10:58 pm

1 stop6h 41m

$275

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Mon 3/2

5:30 pm-9:01 pm

Nonstop2h 31m

Washington, D.C. Dulles Intl

Wed 3/4

1:00 pm-3:04 pm

Nonstop3h 04m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 50 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 December 18, 2025.

It’s typically best to fly out from Missouri to Washington, D.C. Dulles Intl Airport in the evening. Doing so could potentially save you 75% on the flight price compared to flying at noon, which is usually more expensive.

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 16m. Fly via United Airlines or Delta to get the fastest option. Missouri and Washington, D.C. Dulles Intl Airport are separated by a distance of 694 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Missouri to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airlines for a one-way flight from Missouri to Washington, D.C. Dulles Intl Airport are Frontier ($63), Delta ($99), and United Airlines ($119).

  • 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: Mesa Airlines (90%), Brussels Airlines (90%), Avianca (86%).

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

    On average you can expect to pay $1,074 for a flight from Missouri to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $169 while the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl) is currently priced at $155.

  • 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
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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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.
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Charlotte to Dulles Intl 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$172FlexibilityNo cancel feeOn-time62%
DeltaCheapest$124Average$284FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$250Average$389FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$452FlexibilityNo cancel feeOn-time69%

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