HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Missouri

$61+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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

Keep the following information in mind while searching for Dulles Intl to Missouri flight deals. Data was last updated September 11, 2025.

Round-trip from

$196
(Kiwi.com)

One-way from

$61
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$299

Good round-trip deal

$243 or less

Good one-way deal

$125 or less
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. 11% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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

Find 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 September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/37:14 pmIAD - STL
2 stops39h 40mFrontier
Fri 10/1011:32 amSTL - IAD
1 stop10h 57mFrontier
Deal found 9/9$196
This Delta deal was found by Cheapflights users on 9/9. 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.
Tue 9/306:00 amIAD - STL
1 stop4h 59mDelta
Thu 10/26:01 amSTL - IAD
1 stop4h 39mDelta
Deal found 9/9$197
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/166:15 amIAD - STL
1 stop5h 22mFrontier
Mon 10/207:52 pmSTL - IAD
2 stops22h 54mFrontier
Deal found 9/8$198
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Sat 9/207:14 pmIAD - STL
1 stop18h 53mFrontier
Sun 9/214:00 pmSTL - IAD
1 stop7h 15mFrontier
Deal found 9/10$204
This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:10 amIAD - STL
1 stop9h 54mFrontier
Thu 9/2510:49 amSTL - IAD
2 stops12h 26mFrontier
Deal found 9/11$206
This Frontier deal was found by Cheapflights users on 9/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:10 amIAD - STL
1 stop9h 54mFrontier
Thu 9/254:00 pmSTL - IAD
1 stop7h 15mFrontier
Deal found 9/9$207
This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:10 amIAD - STL
1 stop9h 54mFrontier
Sun 9/284:00 pmSTL - IAD
1 stop7h 15mFrontier
Deal found 9/11$208
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/89:00 amIAD - STL
1 stop26h 37mFrontier
Wed 10/157:52 pmSTL - IAD
2 stops36h 17mFrontier
Deal found 9/10$209
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:15 amIAD - STL
1 stop5h 01mFrontier
Thu 10/3011:07 amSTL - IAD
2 stops8h 50mFrontier
Deal found 9/10$210
This Booking.com deal was found by Cheapflights users on 9/9. 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.
Thu 10/26:10 amIAD - STL
1 stop9h 54mFrontier
Sun 10/54:00 pmSTL - IAD
1 stop6h 39mFrontier
Deal found 9/9$212
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/236:15 amIAD - STL
1 stop5h 22mMultiple Airlines
Mon 10/2710:18 amSTL - IAD
2 stops33h 02mMultiple Airlines
Deal found 9/9$214
This Frontier deal was found by Cheapflights users on 9/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:10 amIAD - STL
1 stop9h 54mFrontier
Mon 9/224:00 pmSTL - IAD
1 stop7h 15mFrontier
Deal found 9/9$215

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 September 11, 2025.
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

Mon 10/27

5:50 pm-7:16 pm

Nonstop2h 26m

Lambert-St Louis

Wed 10/29

5:24 pm-11:59 pm

1 stop5h 35m

$245

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 10/3

8:40 am-10:02 am

Nonstop2h 22m

Lambert-St Louis

Mon 10/6

5:28 pm-12:21 am

1 stop5h 53m

$245

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Tue 10/7

1:00 pm-2:48 pm

Nonstop2h 48m

Kansas City

Sat 10/18

7:30 am-1:51 pm

1 stop5h 21m

$246

Washington, D.C.Columbia

IAD - COU

IADCOU

Washington, D.C. Dulles Intl

Thu 9/25

5:15 pm-9:27 pm

1 stop5h 12m

Columbia Regional

Mon 9/29

8:00 am-1:51 pm

1 stop4h 51m

$248

Washington, D.C.Springfield

IAD - SGF

IADSGF

Washington, D.C. Dulles Intl

Sat 10/4

11:47 am-7:21 pm

1 stop8h 34m

Springfield-Branson

Sat 10/18

6:26 pm-11:53 pm

1 stop4h 27m

$249

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Tue 11/18

7:40 am-1:00 pm

1 stop6h 20m

Kansas City

Sat 11/22

2:55 pm-12:55 am

1 stop9h 00m

$255

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 10/18

5:15 pm-10:35 pm

1 stop6h 20m

Lambert-St Louis

Mon 10/20

5:28 pm-12:21 am

1 stop5h 53m

$255

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 11/1

6:40 am-2:55 pm

1 stop9h 15m

Lambert-St Louis

Sun 11/2

5:30 am-1:10 pm

1 stop6h 40m

$258

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 9/30

6:15 am-10:48 am

1 stop5h 33m

Lambert-St Louis

Thu 10/2

8:05 am-11:15 am

Nonstop2h 10m

$262

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Mon 10/27

5:10 pm-9:03 pm

1 stop4h 53m

Kansas City

Tue 10/28

5:55 am-2:38 pm

1 stop7h 43m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Missouri (average of $311). Flying from Washington, D.C. Dulles Intl Airport to Missouri in March is currently the most expensive (average of $356). 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 September 11, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Missouri, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 11, 2025.

The most flights from IAD to USMO are scheduled on a Wednesday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 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 September 11, 2025.
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
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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, American Airlines, and Southwest can get you from Washington, D.C. Dulles Intl Airport to Missouri in just under 2h 26m. Your travel time can differ by up to 6h 08m. 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 United Airlines. According to our data, you can fly for as low as $67. Users have also found prices from $72 and $84 on Frontier and Southwest, 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 United Airlines (82%), GoJet (73%) or Avianca (73%) 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 $115. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $176 on average, our data indicates $377 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Missouri (average of $311). Flying from Washington, D.C. Dulles Intl Airport to Missouri in March is currently the most expensive (average of $356). 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.
Dulles Intl to Dallas/Fort Worth flights
Baltimore to Boston flights
Dulles Intl to Las Vegas flights
Baltimore to Dallas/Fort Worth flights
Dulles Intl to Atlanta flights
Reagan-National to O'Hare Intl flights
Reagan-National to Los Angeles flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to O'Hare Intl flights
Dulles Intl to Orlando flights
Reagan-National to Las Vegas flights
Dulles Intl to Los Angeles flights
Baltimore to O'Hare Intl flights
Reagan-National to Miami flights
Dulles Intl to Seattle flights
Reagan-National to Boston flights
Baltimore to Las Vegas flights
Dulles Intl to Miami flights
Reagan-National to Hobby flights
Baltimore to Hobby flights
Reagan-National to Seattle flights
Reagan-National to San Francisco flights
Dulles Intl to Boston flights
Baltimore to Denver flights
Baltimore to Fort Lauderdale flights
Reagan-National to Orlando flights
Baltimore to Midway flights
Dulles Intl to San Francisco flights
Dulles Intl to Hobby flights
Baltimore to Orlando flights
Reagan-National to Atlanta flights
Baltimore to Los Angeles flights
Dulles Intl to Detroit flights
Baltimore to Atlanta flights
Baltimore to Miami flights
Dulles Intl to New Orleans flights
Dulles Intl to Tampa flights
Dulles Intl to Midway flights
Dulles Intl to Denver flights
Baltimore to Seattle flights
Reagan-National to Fort Lauderdale flights
Baltimore to San Francisco flights
Dulles Intl to Sky Harbor Intl flights
Reagan-National to Detroit flights
Reagan-National to George Bush Intcntl flights
Dulles Intl to Fort Lauderdale flights
Reagan-National to Denver flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to Minneapolis flights
Dulles Intl to Austin flights

Top 3 airlines flying from Dulles Intl to Missouri

Discover the top 3 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$191Average$412FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$198Average$447FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$381FlexibilityNo 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.