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Dulles Intl

$55+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IAD
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Find 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 octubre 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
dom. 12/2110:57 amSTL - IAD
1 stop5h 01mFrontier
mié. 12/247:01 pmIAD - STL
1 stop15h 39mFrontier
Deal found 10/28$200
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
sáb. 12/204:27 pmSTL - IAD
1 stop27h 36mFrontier
mié. 12/247:01 pmIAD - STL
1 stop15h 39mFrontier
Deal found 10/28$201
This Priceline deal was found by Cheapflights users on 10/29. 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.
lun. 11/310:25 amSTL - IAD
1 stop8h 26mFrontier
jue. 11/66:00 amIAD - STL
1 stop5h 12mFrontier
Deal found 10/29$202
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
dom. 12/214:27 pmSTL - IAD
2 stops18h 11mFrontier
sáb. 12/277:11 pmIAD - STL
1 stop15h 29mFrontier
Deal found 10/29$203
This Booking.com deal was found by Cheapflights users on 10/28. 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.
jue. 11/611:07 amSTL - IAD
1 stop4h 27mFrontier
sáb. 11/88:36 pmIAD - STL
1 stop20h 42mFrontier
Deal found 10/28$204
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
vie. 11/144:56 pmSTL - IAD
1 stop6h 15mFrontier
mar. 11/188:40 amIAD - STL
2 stops25h 27mFrontier
Deal found 10/29$207
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
vie. 12/196:58 pmSTL - IAD
1 stop25h 32mFrontier
mié. 12/247:01 pmIAD - STL
1 stop15h 39mFrontier
Deal found 10/28$212
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
jue. 11/1311:07 amSTL - IAD
1 stop12h 04mFrontier
sáb. 11/158:36 pmIAD - STL
2 stops14h 36mFrontier
Deal found 10/30$219
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
mié. 12/177:43 pmSTL - IAD
2 stops14h 55mFrontier
lun. 12/227:06 pmIAD - STL
1 stop15h 34mFrontier
Deal found 10/28$220
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
vie. 12/510:42 amSTL - IAD
1 stop11h 23mFrontier
dom. 12/79:20 pmIAD - STL
2 stops13h 32mFrontier
Deal found 10/27$221
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
mar. 11/117:45 pmSTL - IAD
2 stops23h 35mFrontier
vie. 11/146:00 amIAD - STL
1 stop11h 01mFrontier
Deal found 10/28$222
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
mar. 12/2310:48 amSTL - IAD
1 stop4h 49mMultiple Airlines
lun. 12/297:06 pmIAD - STL
2 stops16h 50mMultiple Airlines
Deal found 10/29$223

Cheap 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 octubre 30, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$202
(Frontier)

One-way from

$55
(Priceline)

Popular in

March

Cheapest in

August

Average price

$316

Good round-trip deal

$465 or less

Good one-way deal

$260 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 ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 octubre 30, 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

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

mié. 1/28

3:14 pm-9:17 pm

1 stop5h 03m

Washington, D.C. Dulles Intl

sáb. 1/31

5:17 pm-9:58 pm

1 stop5h 41m

$249

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

vie. 12/12

5:35 pm-11:08 pm

1 stop4h 33m

Washington, D.C. Dulles Intl

lun. 1/5

6:35 am-10:59 am

1 stop5h 24m

$249

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

vie. 11/14

4:02 pm-12:16 am

1 stop7h 14m

Washington, D.C. Dulles Intl

dom. 11/16

6:00 am-10:53 am

1 stop5h 53m

$259

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

vie. 11/14

5:35 pm-11:07 pm

1 stop4h 32m

Washington, D.C. Dulles Intl

dom. 11/16

4:34 pm-9:53 pm

1 stop6h 19m

$259

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

mié. 12/10

5:45 pm-9:16 pm

Nonstop2h 31m

Washington, D.C. Dulles Intl

sáb. 1/17

1:05 pm-3:10 pm

Nonstop3h 05m

$265

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

mié. 1/21

5:45 pm-9:17 pm

Nonstop2h 32m

Washington, D.C. Dulles Intl

sáb. 1/24

1:05 pm-3:10 pm

Nonstop3h 05m

$269

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

lun. 12/8

8:30 am-11:40 am

Nonstop2h 10m

Washington, D.C. Dulles Intl

lun. 12/15

8:20 am-2:23 pm

1 stop7h 03m

$273

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

mar. 12/9

8:30 am-11:40 am

Nonstop2h 10m

Washington, D.C. Dulles Intl

jue. 12/11

8:20 am-12:15 pm

1 stop4h 55m

$273

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

mié. 12/3

8:30 am-11:40 am

Nonstop2h 10m

Washington, D.C. Dulles Intl

sáb. 12/6

8:40 am-10:07 am

Nonstop2h 27m

$274

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

jue. 11/13

11:55 am-6:26 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

dom. 11/16

10:05 am-3:17 pm

1 stop6h 12m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 55 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 octubre 30, 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 76% 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 33m. 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 873 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: Copa Airlines (85%), Avianca (85%), Lufthansa (80%).

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

    On average you can expect to pay $886 for a flight from Missouri to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $198 while the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl) is currently priced at $253.

  • 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
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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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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Denver to Baltimore flights
Minneapolis to Dulles Intl flights
Minneapolis to Baltimore flights
Denver to Reagan-National flights
Tampa to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Tampa to Baltimore flights
Fort Lauderdale to Dulles Intl flights
Miami to Dulles Intl flights
Minneapolis 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$172FlexibilityNo cancel feeOn-time62%
DeltaCheapest$124Average$304FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$238Average$435FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$250Average$377FlexibilityNo cancel feeOn-time71%

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