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$89+ 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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STL
Mar 26 — Apr 21
Wed 3/26
Wed 4/2
1 adult, Economy
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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 March 21, 2025.

Round-trip from

$217
(Delta)

One-way from

$89
(United Airlines)

Good round-trip deal

$373 or less

Good one-way deal

$149 or less
From Washington, D.C. Dulles Intl to Missouri
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One-way flight from Washington, D.C. Dulles Intl to Missouri
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Missouri.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Missouri.
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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 March 21, 2025.

This Delta deal was found by Cheapflights users on 3/21. 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 5/36:00 amIAD - STL
1 stop4h 47mDelta
Mon 5/57:01 pmSTL - IAD
1 stop4h 27mDelta
Deal found 3/21$217
This United Airlines deal was found by Cheapflights users on 3/21. 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.
Fri 7/48:30 amIAD - STL
1 stop4h 57mUnited Airlines
Sun 7/135:27 pmSTL - IAD
1 stop6h 03mUnited Airlines
Deal found 3/21$224
This Frontier deal was found by Cheapflights users on 3/20. 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.
Tue 7/226:10 amIAD - STL
1 stop8h 39mFrontier
Tue 8/52:52 pmSTL - IAD
1 stop8h 11mFrontier
Deal found 3/20$240
This Frontier deal was found by Cheapflights users on 3/21. 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.
Wed 5/285:15 amIAD - MCI
1 stop9h 22mFrontier
Fri 5/302:32 pmMCI - IAD
1 stop8h 29mFrontier
Deal found 3/21$258
This Sun Country Air deal was found by Cheapflights users on 3/21. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2412:37 pmIAD - MCI
1 stop23h 00mSun Country Air
Sun 4/2710:25 amMCI - IAD
1 stop23h 12mSun Country Air
Deal found 3/21$265
This Delta deal was found by Cheapflights users on 3/20. 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 5/287:05 amIAD - MCI
1 stop5h 02mDelta
Sat 5/315:26 pmMCI - IAD
1 stop5h 09mDelta
Deal found 3/20$295
This American Airlines deal was found by Cheapflights users on 3/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/105:00 amIAD - STL
1 stop4h 30mAmerican Airlines
Fri 4/117:03 pmSTL - IAD
1 stop3h 53mAmerican Airlines
Deal found 3/20$297
This United Airlines deal was found by Cheapflights users on 3/21. 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 4/246:30 amIAD - MCI
1 stop5h 02mUnited Airlines
Mon 4/283:29 pmMCI - IAD
1 stop7h 30mUnited Airlines
Deal found 3/21$299
This American Airlines deal was found by Cheapflights users on 3/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/281:59 pmIAD - MCI
2 stops9h 52mAmerican Airlines
Sat 5/316:33 pmMCI - IAD
1 stop4h 29mAmerican Airlines
Deal found 3/20$300
This Booking.com deal was found by Cheapflights users on 3/20. 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.
Sun 4/1311:51 amIAD - STL
1 stop8h 47mMultiple Airlines
Mon 4/144:57 pmSTL - IAD
1 stop23h 05mMultiple Airlines
Deal found 3/20$319
This Mytrip deal was found by Cheapflights users on 3/20. 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 4/1011:57 amIAD - MCI
3 stops26h 02mMultiple Airlines
Sun 4/139:50 amMCI - IAD
1 stop22h 27mMultiple Airlines
Deal found 3/20$333
This American Airlines deal was found by Cheapflights users on 3/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:13 pmIAD - SGF
1 stop6h 14mAmerican Airlines
Sat 5/32:19 pmSGF - IAD
1 stop7h 23mAmerican Airlines
Deal found 3/20$357

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 March 21, 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

Sat 5/3

6:00 am-9:47 am

1 stop4h 47m

Lambert-St Louis

Mon 5/5

7:01 pm-12:28 am

1 stop4h 27m

$217

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 7/4

8:30 am-12:27 pm

1 stop4h 57m

Lambert-St Louis

Sun 7/13

5:27 pm-12:30 am

1 stop6h 03m

$224

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 7/22

6:10 am-1:49 pm

1 stop8h 39m

Lambert-St Louis

Tue 8/5

2:52 pm-12:03 am

1 stop8h 11m

$240

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Wed 5/28

5:15 am-1:37 pm

1 stop9h 22m

Kansas City

Fri 5/30

2:32 pm-12:01 am

1 stop8h 29m

$258

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Thu 4/24

12:37 pm-10:37 am

1 stop23h 00m

Kansas City

Sun 4/27

10:25 am-10:37 am

1 stop23h 12m

$265

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 4/10

5:00 am-8:30 am

1 stop4h 30m

Lambert-St Louis

Sun 4/13

7:19 am-1:42 pm

1 stop5h 23m

$282

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Wed 5/28

7:05 am-11:07 am

1 stop5h 02m

Kansas City

Sat 5/31

5:26 pm-11:35 pm

1 stop5h 09m

$295

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Thu 4/24

6:30 am-10:32 am

1 stop5h 02m

Kansas City

Mon 4/28

3:29 pm-11:59 pm

1 stop7h 30m

$299

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Wed 5/28

1:59 pm-10:51 pm

2 stops9h 52m

Kansas City

Sat 5/31

6:33 pm-12:02 am

1 stop4h 29m

$300

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sun 4/13

11:51 am-7:38 pm

1 stop8h 47m

Lambert-St Louis

Mon 4/14

4:57 pm-5:02 pm

1 stop23h 05m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 36 results
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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, 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 March 21, 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 March 21, 2025.

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

Rainfall in Missouri by month

Plan your trip to Missouri by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Missouri ranges from 1.1 - 5.2 inches per month. May is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Missouri when rainfall is around 1.1 in.

Temperature in Missouri by month

Plan your trip to Missouri by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Missouri, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

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 March 21, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Washington, D.C. to Missouri to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,278 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,278 reviews
Southwest
8.1
Very good
4,278 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,759 reviews
Southwest
8.1
Very good
4,278 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,895 reviews
Southwest
8.1
Very good
4,278 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,605 reviews
Southwest
8.1
Very good
4,278 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Allegiant Air
7.3
Good
732 reviews
Southwest
8.1
Very good
4,278 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • 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 $89. Users have also found prices from $104 and $109 on Southwest 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 - 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 (84%), Avianca (84%) or Copa Airlines (84%) 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 $114. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $189 on average our data indicates $399 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.

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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.
Dulles Intl to Dallas/Fort Worth flights
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Baltimore to Atlanta flights
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Dulles Intl to Salt Lake City 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 March 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$195Average$393FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$245Average$384FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$265Average$491FlexibilityNo cancel feeOn-time69%
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