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$128+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — MCI
Aug 1 — Aug 81
Sat 8/1
Sat 8/8
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 July 2, 2026.

This Frontier deal was found by Cheapflights users on 6/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/251:21 pm
IAD
-
STL
1 stop11h 38m
Frontier
Thu 7/307:10 pm
STL
-
IAD
1 stop12h 10m
Frontier
Deal found 6/27$263
This Delta deal was found by Cheapflights users on 6/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:16 am
IAD
-
STL
1 stop7h 01m
Delta
Mon 8/105:23 pm
STL
-
IAD
1 stop6h 11m
Delta
Deal found 6/29$265
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Wed 7/223:39 pm
IAD
-
STL
1 stop6h 47m
United Airlines
Mon 7/2712:55 pm
STL
-
IAD
Nonstop2h 12m
United Airlines
Deal found 7/1$266
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:15 am
IAD
-
STL
1 stop6h 47m
United Airlines
Thu 8/275:30 pm
STL
-
IAD
1 stop6h 14m
United Airlines
Deal found 6/28$267
This Frontier deal was found by Cheapflights users on 6/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:49 am
IAD
-
STL
1 stop10h 48m
Frontier
Mon 7/274:57 pm
STL
-
IAD
1 stop4h 58m
Frontier
Deal found 6/30$268
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/308:33 pm
IAD
-
STL
1 stop13h 24m
Frontier
Tue 8/48:08 pm
STL
-
IAD
2 stops13h 08m
Frontier
Deal found 7/1$269
This Booking.com deal was found by Cheapflights users on 6/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:18 pm
IAD
-
STL
1 stop5h 41m
Frontier
Tue 7/284:09 pm
STL
-
IAD
1 stop17h 07m
Frontier
Deal found 6/30$271
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:30 pm
IAD
-
STL
1 stop5h 44m
Delta
Mon 8/176:00 am
STL
-
IAD
1 stop4h 33m
Delta
Deal found 6/30$273
This Kiwi.com deal was found by Cheapflights users on 6/29. 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.
Mon 7/2712:00 pm
IAD
-
STL
2 stops12h 59m
Multiple Airlines
Thu 7/306:34 pm
STL
-
IAD
1 stop21h 40m
Multiple Airlines
Deal found 6/29$275
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:26 pm
IAD
-
STL
1 stop5h 27m
Delta
Wed 7/296:00 am
STL
-
IAD
1 stop4h 37m
Delta
Deal found 7/1$276
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/276:20 am
IAD
-
STL
1 stop12h 02m
Frontier
Sun 8/306:45 pm
STL
-
IAD
1 stop12h 19m
Frontier
Deal found 7/1$279
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:10 am
IAD
-
COU
1 stop5h 03m
United Airlines
Tue 8/48:00 am
COU
-
IAD
1 stop5h 12m
United Airlines
Deal found 6/28$298

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 July 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$263
(Frontier)

One-way from

$128
(Super.com)

Popular in

March

Cheapest in

September

Average price

$361

Good round-trip deal

$389 or less

Good one-way deal

$205 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. 4% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 2, 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

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 8/6

10:16 am-4:17 pm

1 stop7h 01m

Lambert-St Louis

Mon 8/10

5:23 pm-12:34 am

1 stop6h 11m

$265

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 9/22

5:15 pm-10:00 pm

1 stop5h 45m

Lambert-St Louis

Tue 9/29

1:09 pm-4:25 pm

Nonstop2h 16m

$267

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 9/5

8:28 am-2:33 pm

1 stop7h 05m

Lambert-St Louis

Mon 9/7

6:00 am-11:33 am

1 stop4h 33m

$297

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 9/8

6:00 am-9:34 am

1 stop4h 34m

Lambert-St Louis

Fri 9/11

1:40 pm-8:15 pm

1 stop5h 35m

$307

Washington, D.C.Springfield

IAD - SGF

IADSGF

Washington, D.C. Dulles Intl

Wed 8/19

6:15 am-10:48 am

1 stop5h 33m

Springfield-Branson

Mon 8/24

6:37 pm-12:44 am

1 stop5h 07m

$309

Washington, D.C.Springfield

IAD - SGF

IADSGF

Washington, D.C. Dulles Intl

Thu 10/29

8:00 am-2:37 pm

1 stop7h 37m

Springfield-Branson

Sun 11/1

6:06 am-2:09 pm

1 stop7h 03m

$309

Washington, D.C.Springfield

IAD - SGF

IADSGF

Washington, D.C. Dulles Intl

Thu 9/24

12:26 pm-4:54 pm

1 stop5h 28m

Springfield-Branson

Fri 10/2

5:34 pm-12:40 am

1 stop6h 06m

$309

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 9/2

6:00 am-9:20 am

1 stop4h 20m

Lambert-St Louis

Sun 9/6

1:04 pm-8:05 pm

1 stop6h 01m

$320

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sun 9/20

8:00 am-1:23 pm

1 stop6h 23m

Lambert-St Louis

Sat 10/3

7:05 am-2:12 pm

1 stop6h 07m

$329

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 11/5

12:30 pm-5:06 pm

1 stop5h 36m

Lambert-St Louis

Sun 11/8

5:28 pm-12:31 am

1 stop6h 03m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 $72). Flying from Washington, D.C. Dulles Intl Airport to Missouri in March is currently the most expensive (average of $267). 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 July 2, 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 17% on your trip compared to booking a flight in the afternoon.

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 July 2, 2026.

The most flights from IAD to USMO are scheduled on a Monday (7 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (6 on average).

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

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Missouri?

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to Missouri. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 June 27, 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.

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 July 2, 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
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,453 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,927 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,766 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Frontier
5.6
Fair
2,848 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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?

    Delta and United Airlines can get you from Washington, D.C. Dulles Intl Airport to Missouri in just under 5h 45m. Your travel time can differ by up to 1h 16m. 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 $127 and $139 on American Airlines and Delta, 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 - Kansas City, Washington, D.C. Dulles Intl - Lambert-St Louis 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 (85%), Mesa Airlines (83%) or Avianca (80%) 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 $147. While the most popular route (Washington, D.C. Dulles Intl - Kansas City) can be booked for $208 on average, our data indicates $375 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 $72). Flying from Washington, D.C. Dulles Intl Airport to Missouri in March is currently the most expensive (average of $267). 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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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 July 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$254FlexibilityNo cancel feeOn-time62%
DeltaCheapest$124Average$393FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$250Average$432FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$255Average$443FlexibilityNo cancel feeOn-time69%

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