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Missouri

$65+ Cheap flights from Dulles Intl (IAD) to Missouri

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STL
May 3 — May 101
Sun 5/3
Sun 5/10
1 adult, Economy
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Cheap flight deals from Dulles Intl to Missouri

Cheapest flights from Dulles Intl to Missouri
Explore the most affordable flight options available from Dulles Intl to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2026.

This United Airlines deal was found by Cheapflights users on 3/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/285:26 pm
IAD
-
STL
1 stop4h 47m
United Airlines
Tue 5/58:45 am
STL
-
IAD
Nonstop2h 10m
United Airlines
Deal found 3/29$275
This Kiwi.com deal was found by Cheapflights users on 4/2. 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.
Sat 4/187:05 am
IAD
-
STL
2 stops13h 27m
Frontier
Tue 5/56:41 pm
STL
-
IAD
1 stop14h 31m
Frontier
Deal found 4/2$276
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Thu 4/166:10 am
IAD
-
STL
2 stops14h 11m
Frontier
Fri 4/178:23 pm
STL
-
IAD
1 stop12h 31m
Frontier
Deal found 3/29$277
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Thu 4/166:10 am
IAD
-
STL
1 stop5h 20m
Frontier
Sat 4/188:23 pm
STL
-
IAD
2 stops15h 08m
Frontier
Deal found 4/1$278
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Mon 4/278:17 am
IAD
-
STL
1 stop16h 02m
Frontier
Fri 5/14:59 pm
STL
-
IAD
2 stops15h 55m
Frontier
Deal found 3/30$279
This Delta deal was found by Cheapflights users on 3/31. 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 5/65:27 pm
IAD
-
SGF
1 stop4h 40m
Delta
Wed 5/136:52 pm
SGF
-
IAD
1 stop4h 59m
Delta
Deal found 3/31$279
This CheapOair deal was found by Cheapflights users on 4/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/171:31 pm
IAD
-
STL
1 stop10h 48m
Frontier
Sun 4/194:59 pm
STL
-
IAD
1 stop13h 28m
Frontier
Deal found 4/2$281
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Mon 5/46:00 am
IAD
-
STL
2 stops18h 19m
Frontier
Thu 5/76:55 pm
STL
-
IAD
1 stop14h 17m
Frontier
Deal found 4/1$283
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Fri 5/153:59 pm
IAD
-
MCI
2 stops22h 50m
Frontier
Mon 5/186:24 pm
MCI
-
IAD
1 stop14h 48m
Frontier
Deal found 3/29$283
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Thu 4/236:10 am
IAD
-
STL
2 stops18h 09m
Frontier
Sun 4/264:59 pm
STL
-
IAD
1 stop13h 33m
Frontier
Deal found 3/29$284
This United Airlines deal was found by Cheapflights users on 4/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:15 pm
IAD
-
MCI
Nonstop2h 48m
United Airlines
Tue 5/264:56 pm
MCI
-
IAD
1 stop6h 49m
United Airlines
Deal found 4/2$284
This Delta deal was found by Cheapflights users on 3/31. 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.
Sat 5/23:00 pm
IAD
-
STL
1 stop5h 11m
Delta
Sat 5/166:00 am
STL
-
IAD
1 stop4h 50m
Delta
Deal found 3/31$285

Find flight deals from Dulles Intl to Missouri

Keep the following information in mind while searching for Dulles Intl to Missouri flight deals. Data was last updated April 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$275
(United Airlines)

One-way from

$65
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$323

Good round-trip deal

$323 or less

Good one-way deal

$184 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lambert-St Louis flights.
Search Deals
From Washington, D.C. Dulles Intl to Missouri
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Missouri
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Missouri.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Missouri.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Missouri 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 April 3, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 5/2

9:00 am-10:28 am

Nonstop2h 28m

Lambert-St Louis

Wed 5/6

8:45 am-11:55 am

Nonstop2h 10m

$281

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 5/12

6:08 am-9:44 am

1 stop4h 36m

Lambert-St Louis

Tue 5/12

6:04 pm-10:56 pm

1 stop3h 52m

$285

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 4/23

6:00 am-9:42 am

1 stop4h 42m

Lambert-St Louis

Mon 4/27

5:59 pm-11:03 pm

1 stop4h 04m

$285

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 5/16

5:15 pm-9:13 pm

1 stop4h 58m

Lambert-St Louis

Mon 5/18

7:09 pm-12:33 am

1 stop4h 24m

$285

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 5/2

7:06 am-11:56 am

1 stop5h 50m

Lambert-St Louis

Sat 5/16

5:15 pm-12:51 am

1 stop6h 36m

$285

Washington, D.C.Columbia

IAD - COU

IADCOU

Washington, D.C. Dulles Intl

Thu 4/23

6:15 am-10:55 am

1 stop5h 40m

Columbia Regional

Mon 4/27

3:23 pm-9:04 pm

1 stop4h 41m

$318

Washington, D.C.Columbia

IAD - COU

IADCOU

Washington, D.C. Dulles Intl

Wed 4/15

8:20 am-2:48 pm

1 stop7h 28m

Columbia Regional

Mon 4/20

3:23 pm-9:04 pm

1 stop4h 41m

$323

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 6/10

8:15 am-12:11 pm

1 stop4h 56m

Lambert-St Louis

Sat 6/20

8:35 am-11:47 am

Nonstop2h 12m

$326

Washington, D.C.Columbia

IAD - COU

IADCOU

Washington, D.C. Dulles Intl

Tue 4/14

10:10 am-2:48 pm

1 stop5h 38m

Columbia Regional

Sat 4/18

3:23 pm-9:04 pm

1 stop4h 41m

$328

Washington, D.C.Columbia

IAD - COU

IADCOU

Washington, D.C. Dulles Intl

Wed 4/22

6:25 am-3:58 pm

2 stops10h 33m

Columbia Regional

Sat 4/25

6:00 am-2:51 pm

2 stops7h 51m

$329

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/29

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Missouri

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

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Missouri (average of $124). Flying from Washington, D.C. Dulles Intl Airport to Missouri in March is currently the most expensive (average of $343). 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 IAD to MO?

Find hourly flight availability from Dulles Intl to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2026.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Missouri at noon. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Missouri?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Missouri. Price data was last updated on March 28, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Missouri flight should consider departing on Friday evenings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from Dulles Intl to Missouri. 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 April 3, 2026.

The most flights from IAD to USMO are scheduled on a Monday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).

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

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated April 3, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican Airlines from Washington, D.C. Dulles Intl Airport to Missouri to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,374 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,374 reviews
Delta
7.9
Good
8,374 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,538 reviews
Delta
7.9
Good
8,374 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,552 reviews
Delta
7.9
Good
8,374 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.7
Fair
3,000 reviews
Delta
7.9
Good
8,374 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Missouri. 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 Washington, D.C. Dulles Intl Airport to Missouri?

    United Airlines, Delta, and American Airlines can get you from Washington, D.C. Dulles Intl Airport to Missouri in just under 2h 28m. Your travel time can differ by up to 8h 05m. The distance from Washington, D.C. Dulles Intl Airport to Missouri is about 694 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $60. Users have also found prices from $99 and $123 on Delta and United Airlines, respectively.

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

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

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Missouri consider choosing Republic Airways (100%), United Airlines (88%) or Lufthansa (87%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $127. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $213 on average, our data indicates $630 when flying from Washington, D.C. Dulles Intl Airport to Missouri.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Missouri 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 Washington, D.C. Dulles Intl Airport to Missouri?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Missouri (average of $124). Flying from Washington, D.C. Dulles Intl Airport to Missouri in March is currently the most expensive (average of $343). 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

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Alternative routes for Dulles Intl to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Baltimore to Atlanta flights
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Reagan-National to Las Vegas flights
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Dulles Intl to Denver flights
Baltimore to O'Hare Intl flights
Dulles Intl to O'Hare Intl flights
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Dulles Intl to Tampa flights
Baltimore to Denver flights
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Reagan-National to Atlanta flights
Reagan-National to Dallas/Fort Worth flights
Baltimore to Seattle flights
Reagan-National to San Francisco flights
Baltimore to San Francisco flights
Dulles Intl to George Bush Intcntl flights
Dulles Intl to Sky Harbor Intl flights
Baltimore to Tampa flights
Reagan-National to O'Hare Intl flights
Baltimore to Hobby flights
Dulles Intl to Boston flights
Dulles Intl to Fort Lauderdale flights
Reagan-National to Tampa flights
Reagan-National to Fort Lauderdale flights
Reagan-National to George Bush Intcntl flights
Reagan-National to Boston flights
Dulles Intl to Nashville flights
Dulles Intl to Midway flights
Dulles Intl to Austin flights
Reagan-National to Nashville flights
Reagan-National to Denver flights
Reagan-National to New Orleans flights

Top 4 airlines flying from Dulles Intl to Missouri

Discover the top 4 airlines that operate flights from Dulles Intl to Missouri. 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 April 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$220FlexibilityNo cancel feeOn-time62%
DeltaCheapest$124Average$335FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$419FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$393FlexibilityNo cancel feeOn-time71%

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