HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Missouri

$63+ 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STL
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Missouri with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 3, 2026.

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.
Thu 3/510:10 am
IAD
-
STL
1 stop14h 49m
Frontier
Fri 3/61:09 pm
STL
-
IAD
1 stop10h 22m
Frontier
Deal found 2/2$253
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/26:00 am
IAD
-
STL
1 stop5h 30m
Frontier
Tue 4/74:54 pm
STL
-
IAD
1 stop16h 17m
Frontier
Deal found 2/2$256
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.
Thu 2/1211:44 am
IAD
-
STL
1 stop20h 07m
Frontier
Fri 2/138:20 pm
STL
-
IAD
1 stop13h 22m
Frontier
Deal found 2/1$258
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/235:17 pm
IAD
-
COU
1 stop5h 16m
United Airlines
Sat 2/2811:15 am
COU
-
IAD
1 stop4h 45m
United Airlines
Deal found 2/2$258
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.
Thu 2/1211:44 am
IAD
-
STL
1 stop20h 07m
Frontier
Sat 2/148:17 pm
STL
-
IAD
1 stop12h 58m
Frontier
Deal found 2/1$259
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.
Sun 3/228:15 am
IAD
-
STL
1 stop23h 47m
Frontier
Tue 3/2411:27 am
STL
-
IAD
1 stop11h 29m
Frontier
Deal found 2/1$260
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.
Sat 4/115:16 pm
IAD
-
STL
1 stop18h 14m
Frontier
Sat 4/188:13 pm
STL
-
IAD
1 stop27h 23m
Frontier
Deal found 2/2$261
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.
Mon 3/96:20 am
IAD
-
STL
1 stop7h 59m
Frontier
Thu 3/129:05 pm
STL
-
IAD
2 stops26h 26m
Frontier
Deal found 2/2$263
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:45 pm
IAD
-
STL
Nonstop2h 38m
United Airlines
Tue 3/1011:25 am
STL
-
IAD
1 stop5h 05m
United Airlines
Deal found 2/1$266
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.
Sat 2/2110:29 am
IAD
-
STL
2 stops14h 30m
Frontier
Sat 2/288:17 pm
STL
-
IAD
1 stop13h 13m
Frontier
Deal found 2/2$267
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/281:00 pm
IAD
-
MCI
Nonstop3h 04m
United Airlines
Tue 3/312:37 pm
MCI
-
IAD
Nonstop2h 30m
United Airlines
Deal found 2/2$267
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/175:17 pm
IAD
-
COU
1 stop5h 16m
United Airlines
Sat 2/213:10 pm
COU
-
IAD
1 stop5h 08m
United Airlines
Deal found 2/2$268

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$253
(Kiwi.com)

One-way from

$63
(Trip.com)

Popular in

January

Cheapest in

August

Average price

$353

Good round-trip deal

$319 or less

Good one-way deal

$183 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. 16% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 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 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.
Search Deals

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 February 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

Dulles Intl

Fly to

Missouri

Route

Depart

Return

Price

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 4/2

6:00 am-10:30 am

1 stop5h 30m

Lambert-St Louis

Tue 4/7

4:54 pm-10:11 am

1 stop16h 17m

$256

Washington, D.C.Columbia

IAD - COU

IADCOU

Washington, D.C. Dulles Intl

Wed 4/22

8:20 am-2:48 pm

1 stop7h 28m

Columbia Regional

Sat 4/25

11:30 am-7:23 pm

1 stop6h 53m

$258

Washington, D.C.Columbia

IAD - COU

IADCOU

Washington, D.C. Dulles Intl

Mon 2/23

5:17 pm-9:33 pm

1 stop5h 16m

Columbia Regional

Sat 2/28

11:15 am-5:00 pm

1 stop4h 45m

$258

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 3/18

8:40 am-10:12 am

Nonstop2h 32m

Lambert-St Louis

Sat 3/21

7:00 pm-11:59 pm

1 stop3h 59m

$269

Washington, D.C.Springfield

IAD - SGF

IADSGF

Washington, D.C. Dulles Intl

Thu 2/19

8:15 am-2:40 pm

1 stop7h 25m

Springfield-Branson

Tue 2/24

7:55 am-4:05 pm

1 stop7h 10m

$274

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Sat 4/18

1:05 pm-3:02 pm

Nonstop2h 57m

Kansas City

Tue 4/21

11:30 am-5:28 pm

1 stop4h 58m

$277

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 3/11

5:35 pm-7:13 pm

Nonstop2h 38m

Lambert-St Louis

Tue 3/31

8:30 am-11:43 am

Nonstop2h 13m

$295

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 2/21

5:17 pm-9:05 pm

1 stop4h 48m

Lambert-St Louis

Mon 2/23

12:15 pm-3:27 pm

Nonstop2h 12m

$297

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 4/11

9:00 am-10:31 am

Nonstop2h 31m

Lambert-St Louis

Sat 4/18

9:10 am-4:03 pm

1 stop5h 53m

$301

Washington, D.C.Springfield

IAD - SGF

IADSGF

Washington, D.C. Dulles Intl

Tue 3/3

6:00 am-11:35 am

1 stop6h 35m

Springfield-Branson

Tue 3/10

1:15 pm-8:29 pm

1 stop6h 14m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 60 results
1
2
3
...
6

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 November is currently the most expensive (average of $251). 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 February 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 21% 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 January 31, 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 February 3, 2026.

The most flights from IAD to USMO are scheduled on a Monday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).

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 February 3, 2026.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American 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
8,138 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Overall

7.9

Food

7.2

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
8,138 reviews
Delta
7.9
Good
8,138 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Overall

7.9

Food

7.2

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
9,236 reviews
Delta
7.9
Good
8,138 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Overall

7.9

Food

7.2

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
7.2
Good
11,217 reviews
Delta
7.9
Good
8,138 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Overall

7.9

Food

7.2

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
3,051 reviews
Delta
7.9
Good
8,138 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Overall

7.9

Food

7.2

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?

    Frontier, United Airlines, and American Airlines can get you from Washington, D.C. Dulles Intl Airport to Missouri in just under 5h 30m. Your travel time can differ by up to 1h 58m. 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 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 GoJet (75%), United Airlines (75%) or Avianca (63%) 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 $113. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $235 on average, our data indicates $516 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 November is currently the most expensive (average of $251). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to Fort Lauderdale flights
Dulles Intl to Miami flights
Dulles Intl to Orlando flights
Reagan-National to Miami flights
Dulles Intl to Las Vegas flights
Reagan-National to Orlando flights
Dulles Intl to Fort Lauderdale flights
Baltimore to Miami flights
Dulles Intl to Dallas/Fort Worth flights
Reagan-National to Los Angeles flights
Dulles Intl to Los Angeles flights
Baltimore to Orlando flights
Baltimore to Los Angeles flights
Dulles Intl to Tampa flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Las Vegas flights
Baltimore to Las Vegas flights
Baltimore to Dallas/Fort Worth flights
Reagan-National to Hobby flights
Baltimore to Atlanta flights
Dulles Intl to Seattle flights
Dulles Intl to Sky Harbor Intl flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to Hobby flights
Baltimore to Denver flights
Reagan-National to Seattle flights
Reagan-National to Tampa flights
Baltimore to O'Hare Intl flights
Reagan-National to San Francisco flights
Baltimore to Hobby flights
Dulles Intl to Salt Lake City flights
Reagan-National to Atlanta flights
Dulles Intl to Denver flights
Dulles Intl to New Orleans flights
Baltimore to Tampa flights
Dulles Intl to O'Hare Intl flights
Dulles Intl to San Francisco flights
Baltimore to San Francisco flights
Baltimore to Sky Harbor Intl flights
Baltimore to West Palm Beach flights
Reagan-National to Denver flights
Baltimore to New Orleans flights
Reagan-National to O'Hare Intl flights
Dulles Intl to Atlanta flights
Baltimore to Boston flights
Reagan-National to Boston flights
Reagan-National to George Bush Intcntl flights
Reagan-National to Sky Harbor Intl flights
Dulles Intl to Boston flights
Dulles Intl to George Bush Intcntl 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$220FlexibilityNo cancel feeOn-time62%
DeltaCheapest$124Average$357FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$233Average$409FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$438FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights