Dulles Intl

$100+ Cheap flights from Missouri to Dulles Intl (IAD)

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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IAD
May 5 — May 121
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Missouri to Dulles Intl 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 Missouri to Dulles Intl

Keep the following information in mind while searching for Missouri to Dulles Intl flight deals. Data was last updated April 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$204
(United Airlines)

One-way from

$100
(Delta)

Popular in

March

Cheapest in

November

Average price

$371

Good round-trip deal

$763 or less

Good one-way deal

$204 or less
Provider with most accurate pricing for Kansas City-Washington, D.C. (WAS) flight deals.
Provider most trusted by Cheapflights users for Kansas City-Washington, D.C. (WAS) flights.
From Missouri to Washington, D.C. Dulles Intl
One-way flight from Missouri to Washington, D.C. Dulles Intl
Highest demand for flights based on searches. 7% potential increase in price ($26 potential increase over avg. RT price).
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Average for round-trip flights in April 2025
Price to beat on a round-trip flight from Missouri to Washington, D.C. Dulles Intl.
Price to beat on a one-way flight from Missouri to Washington, D.C. Dulles Intl.

Find flight deals from Missouri to Dulles Intl

Cheapest flights from Missouri to Dulles Intl
Explore the most affordable flight options available from Missouri to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 5/295:00 amSTL - IAD
1 stop5h 55mUnited Airlines
Sat 5/318:40 amIAD - STL
Nonstop2h 16mUnited Airlines
Deal found 4/29$204
This Booking.com deal was found by Cheapflights users on 4/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/215:45 pmSTL - IAD
1 stop17h 47mFrontier
Sat 5/2411:02 amIAD - STL
1 stop13h 42mFrontier
Deal found 4/28$208
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:40 pmSTL - IAD
1 stop4h 55mDelta
Mon 5/266:00 amIAD - STL
1 stop4h 00mDelta
Deal found 4/28$224
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/316:47 pmSTL - IAD
1 stop4h 15mAmerican Airlines
Tue 6/31:59 pmIAD - STL
1 stop6h 24mAmerican Airlines
Deal found 4/29$251
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 6/95:45 pmMCI - IAD
Nonstop2h 35mUnited Airlines
Tue 6/101:20 pmIAD - MCI
Nonstop2h 44mUnited Airlines
Deal found 4/29$294
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/295:46 amMCI - IAD
2 stops31h 37mMultiple Airlines
Sun 6/111:54 amIAD - MCI
1 stop23h 54mMultiple Airlines
Deal found 4/29$303
This Delta deal was found by Cheapflights users on 4/29. 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.
Tue 10/72:55 pmMCI - IAD
1 stop5h 18mDelta
Sat 10/116:00 amIAD - MCI
1 stop6h 28mDelta
Deal found 4/29$306
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/119:36 amMCI - IAD
1 stop6h 59mAmerican Airlines
Fri 6/138:14 pmIAD - MCI
1 stop4h 36mAmerican Airlines
Deal found 4/29$311
This Frontier deal was found by Cheapflights users on 4/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/263:02 pmMCI - IAD
1 stop7h 30mFrontier
Mon 6/25:15 amIAD - MCI
1 stop9h 24mFrontier
Deal found 4/28$320
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Wed 6/48:05 amJLN - IAD
1 stop7h 04mUnited Airlines
Sat 6/75:18 pmIAD - JLN
1 stop7h 22mUnited Airlines
Deal found 4/28$324
This Southwest deal was found by Cheapflights users on 4/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/56:00 amMCI - IAD
1 stop6h 20mSouthwest
Mon 6/95:00 amIAD - MCI
1 stop6h 20mSouthwest
Deal found 4/28$391
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2910:10 amSTL - IAD
2 stops27h 13mMultiple Airlines
Sun 6/111:54 amIAD - STL
2 stops7h 47mMultiple Airlines
Deal found 4/29$393

Cheapflights Fare Finder

Customize your flight search to find flights from Missouri to Dulles Intl 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 30, 2025.
Use the filters below to find and compare flights from Missouri to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Missouri

Fly to

Dulles Intl

Route

Depart

Return

Price

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Thu 5/29

5:00 am-11:55 am

1 stop5h 55m

Washington, D.C. Dulles Intl

Sat 5/31

8:40 am-9:56 am

Nonstop2h 16m

$204

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Wed 5/21

5:45 pm-12:32 pm

1 stop17h 47m

Washington, D.C. Dulles Intl

Sat 5/24

11:02 am-11:44 pm

1 stop13h 42m

$208

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 5/24

5:40 pm-11:35 pm

1 stop4h 55m

Washington, D.C. Dulles Intl

Mon 5/26

6:00 am-9:00 am

1 stop4h 00m

$224

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 5/31

6:47 pm-12:02 am

1 stop4h 15m

Washington, D.C. Dulles Intl

Tue 6/3

1:59 pm-7:23 pm

1 stop6h 24m

$251

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Mon 6/9

5:45 pm-9:20 pm

Nonstop2h 35m

Washington, D.C. Dulles Intl

Tue 6/10

1:20 pm-3:04 pm

Nonstop2h 44m

$294

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Thu 5/29

5:46 am-2:23 pm

2 stops31h 37m

Washington, D.C. Dulles Intl

Sun 6/1

11:54 am-10:48 am

1 stop23h 54m

$303

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Tue 10/7

2:55 pm-9:13 pm

1 stop5h 18m

Washington, D.C. Dulles Intl

Sat 10/11

6:00 am-11:28 am

1 stop6h 28m

$306

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Wed 6/11

9:36 am-5:35 pm

1 stop6h 59m

Washington, D.C. Dulles Intl

Fri 6/13

8:14 pm-11:50 pm

1 stop4h 36m

$311

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Mon 5/26

3:02 pm-11:32 pm

1 stop7h 30m

Washington, D.C. Dulles Intl

Mon 6/2

5:15 am-1:39 pm

1 stop9h 24m

$320

JoplinWashington, D.C.

JLN - IAD

JLNIAD

Joplin

Wed 6/4

8:05 am-4:09 pm

1 stop7h 04m

Washington, D.C. Dulles Intl

Sat 6/7

5:18 pm-11:40 pm

1 stop7h 22m

$324

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 34 results
1
2
3
4

Best time to book a flight from Missouri to Dulles Intl

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

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

Currently, August is the cheapest month in which you can book a flight from Missouri to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Missouri to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $373). 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 MO to IAD?

Find hourly flight availability from Missouri to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Washington, D.C. Dulles Intl Airport as you normally would.

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

Explore weekly flight availability from Missouri to Dulles Intl. 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 30, 2025.

The most flights from USMO to IAD are scheduled on a Monday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Dulles Intl by month

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

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

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

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated April 30, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Missouri to Washington, D.C. by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
8.0
Very good

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

    The cheapest airlines for a one-way flight from Missouri to Washington, D.C. Dulles Intl Airport are Delta ($100), Frontier ($110), and United Airlines ($115).

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

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Missouri to Washington, D.C. Dulles Intl Airport on time: GoJet (82%), Avianca (82%), Copa Airlines (82%).

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

    On average you can expect to pay $1,212 for a flight from Missouri to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $148 while the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl) is currently priced at $199.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Missouri to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Missouri to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $373). 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

Traveling to a place near Missouri?

Book flights to Missouri if you plan to visit one of these locations
Alexandria
Arlington
Woodbridge
Tysons
Fairfax
Springfield
Rockville
Fredericksburg
Silver Spring
Gaithersburg
Linthicum Heights
Falls Church
Laurel
Easton
Towson
Herndon
Sterling
Bowie
National Harbor
Oxon Hill

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 Missouri to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Missouri to Dulles Intl

Discover the top 3 airlines that operate flights from Missouri to Dulles Intl. 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$129Average$360FlexibilityNo cancel feeOn-time71%
DeltaCheapest$207Average$286FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$210Average$430FlexibilityNo cancel feeOn-time69%

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.