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Cheap flights from Washington, D.C. Dulles Intl Airport to St. Louis from $63

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to St. Louis departing on 1/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Washington, D.C. Dulles Intl Airport to St. Louis that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Washington, D.C. Dulles Intl Airport to St. Louis.

Cheap last minute flights

Planning a quick getaway from Washington, D.C. Dulles Intl Airport to St. Louis? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Washington, D.C. Dulles Intl Airport to St. Louis

Find recent round-trip train or bus tickets from Washington, D.C. Dulles Intl Airport to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
5:57 pm - 11:27 pmIAD-STL
6h 30m1 stop
5:05 pm - 5:57 pmSTL-IAD
23h 52m1 stop
$128Frontier
Find Deal
Sun, Jan 12 - Wed, Jan 15
7:19 pm - 11:31 pmIAD-STL
29h 12m1 stop
5:05 pm - 5:05 pmSTL-IAD
23h 00m1 stop
$138Frontier
Find Deal
Fri, Jan 31 - Sun, Feb 9
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$229United Airlines
Find Deal
Fri, Jan 17 - Sun, Jan 19
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
1:02 pm - 9:01 pmSTL-IAD
6h 59m1 stop
$239United Airlines
Find Deal
Fri, Jan 17 - Sun, Jan 19
7:09 pm - 11:43 pmIAD-STL
5h 34m1 stop
7:15 am - 2:36 pmSTL-IAD
6h 21m1 stop
$273Delta
Find Deal
Thu, Dec 12 - Sat, Dec 14
5:00 am - 8:54 amIAD-STL
4h 54m1 stop
6:02 pm - 11:55 pmSTL-IAD
4h 53m1 stop
$296American Airlines
Find Deal
Fri, Dec 13 - Mon, Dec 16
5:27 pm - 9:35 pmIAD-STL
5h 08m1 stop
5:55 pm - 11:02 pmSTL-IAD
4h 07m1 stop
$317Delta
Find Deal
Sun, Dec 29 - Tue, Dec 31
5:00 am - 8:54 amIAD-STL
4h 54m1 stop
9:34 am - 4:58 pmSTL-IAD
6h 24m1 stop
$321American Airlines
Find Deal
Fri, Dec 13 - Sat, Dec 14
6:45 am - 2:40 pmIAD-STL
8h 55m1 stop
5:30 am - 2:10 pmSTL-IAD
7h 40m1 stop
$374Southwest
Find Deal
Fri, Dec 13 - Sun, Dec 15
7:25 am - 4:55 pmIAD-STL
10h 30m1 stop
7:45 am - 7:00 pmSTL-IAD
10h 15m1 stop
$377Southwest
Find Deal
Tue, Dec 10 - Fri, Dec 13
5:57 pm - 11:27 pmIAD-STL
6h 30m1 stop
$63Frontier
Find Deal
Sun, Jan 12
5:57 pm - 11:27 pmIAD-STL
6h 30m1 stop
$64Frontier
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Sun, Jan 12
6:50 pm - 8:23 pmIAD-STL
2h 33mnonstop
$115United Airlines
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Tue, Dec 24
5:27 pm - 9:43 pmIAD-STL
5h 16m1 stop
$124Delta
Find Deal
Wed, Dec 25
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
$126United Airlines
Find Deal
Tue, Jan 7
8:10 pm - 12:01 amIAD-STL
4h 51m1 stop
$138American Airlines
Find Deal
Sat, Dec 28
5:15 am - 11:10 amIAD-STL
6h 55m1 stop
$148Southwest
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Thu, Jan 2
6:10 am - 9:31 amIAD-STL
4h 21m1 stop
$149Delta
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Sun, May 11
5:00 am - 8:50 amIAD-STL
4h 50m1 stop
$183American Airlines
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Tue, Dec 24
7:05 am - 6:25 pmIAD-STL
12h 20m2 stops
$191Southwest
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Tue, Mar 11
6:00 am - 9:36 amIAD-STL
4h 36m1 stop
7:11 pm - 12:06 amSTL-IAD
3h 55m1 stop
$538Delta
Find Deal
Tue, Nov 26 - Wed, Nov 27
6:18 pm - 11:41 pmIAD-STL
6h 23m1 stop
6:00 pm - 11:22 pmSTL-IAD
4h 22m1 stop
$598Delta
Find Deal
Mon, Nov 25 - Mon, Dec 2
8:35 am - 10:01 amIAD-STL
2h 26mnonstop
12:00 pm - 8:18 pmSTL-IAD
7h 18m1 stop
$599United Airlines
Find Deal
Tue, Nov 26 - Wed, Nov 27
6:45 am - 2:40 pmIAD-STL
8h 55m1 stop
9:55 pm - 12:00 pmSTL-IAD
13h 05m2 stops
$603Southwest
Find Deal
Mon, Nov 25 - Wed, Nov 27
6:40 pm - 7:41 amIAD-STL
14h 01m1 stop
6:41 pm - 5:40 pmSTL-IAD
21h 59m1 stop
$613Frontier
Find Deal
Sun, Nov 24 - Tue, Nov 26
8:35 am - 10:01 amIAD-STL
2h 26mnonstop
12:37 pm - 3:45 pmSTL-IAD
2h 08mnonstop
$614United Airlines
Find Deal
Sun, Nov 24 - Fri, Nov 29
6:20 am - 10:27 amIAD-STL
5h 07m1 stop
8:25 am - 11:36 amSTL-IAD
2h 11mnonstop
$624United Airlines
Find Deal
Fri, Nov 22 - Tue, Dec 3
5:00 am - 8:49 amIAD-STL
4h 49m1 stop
5:00 am - 1:02 pmSTL-IAD
7h 02m1 stop
$633American Airlines
Find Deal
Tue, Nov 26 - Fri, Nov 29
2:50 pm - 12:25 amIAD-STL
10h 35m1 stop
9:55 am - 7:00 pmSTL-IAD
8h 05m2 stops
$663Southwest
Find Deal
Fri, Nov 22 - Sun, Nov 24
5:00 am - 8:49 amIAD-STL
4h 49m1 stop
9:30 am - 5:18 pmSTL-IAD
6h 48m1 stop
$709American Airlines
Find Deal
Tue, Nov 26 - Sat, Nov 30
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$229United Airlines
Find Deal
Fri, Jan 17 - Sun, Jan 19
8:30 am - 9:54 amIAD-STL
2h 24mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$243United Airlines
Find Deal
Sat, Jan 4 - Sat, Jan 11
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$264United Airlines
Find Deal
Fri, Jan 10 - Sat, Jan 11
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
12:55 pm - 4:03 pmSTL-IAD
2h 08mnonstop
$265United Airlines
Find Deal
Sun, Jan 12 - Wed, Jan 15
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$285United Airlines
Find Deal
Thu, Jan 16 - Sun, Jan 19
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$299United Airlines
Find Deal
Fri, Jan 17 - Mon, Jan 20
6:50 pm - 8:23 pmIAD-STL
2h 33mnonstop
8:25 am - 11:43 amSTL-IAD
2h 18mnonstop
$313United Airlines
Find Deal
Sun, Dec 29 - Tue, Dec 31
8:50 am - 10:16 amIAD-STL
2h 26mnonstop
8:25 am - 11:43 amSTL-IAD
2h 18mnonstop
$323United Airlines
Find Deal
Wed, Dec 18 - Wed, Dec 25
8:50 am - 10:24 amIAD-STL
2h 34mnonstop
8:15 am - 11:33 amSTL-IAD
2h 18mnonstop
$341United Airlines
Find Deal
Thu, Jan 16 - Sun, Jan 19
6:50 pm - 8:23 pmIAD-STL
2h 33mnonstop
8:25 am - 11:43 amSTL-IAD
2h 18mnonstop
$354United Airlines
Find Deal
Mon, Dec 23 - Thu, Jan 2

Delta flights from Washington, D.C. Dulles Intl Airport to St. Louis

Our best Delta deals on Washington, D.C. Dulles Intl Airport to St. Louis flight tickets
Delta
Dec 12
IAD7:09 pmWashington, D.C. Dulles Intl
5h 34m
1 stop
STL11:43 pmLambert-St Louis
Dec 14
STL7:15 amLambert-St Louis
6h 21m
1 stop
IAD2:36 pmWashington, D.C. Dulles Intl
Delta
Dec 29
IAD5:27 pmWashington, D.C. Dulles Intl
5h 08m
1 stop
STL9:35 pmLambert-St Louis
Dec 31
STL5:55 pmLambert-St Louis
4h 07m
1 stop
IAD11:02 pmWashington, D.C. Dulles Intl
Delta
Dec 29
IAD5:27 pmWashington, D.C. Dulles Intl
5h 08m
1 stop
STL9:35 pmLambert-St Louis
Dec 31
STL5:55 pmLambert-St Louis
4h 07m
1 stop
IAD11:02 pmWashington, D.C. Dulles Intl

American Airlines flights from Washington, D.C. Dulles Intl Airport to St. Louis

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to St. Louis flight tickets
American Airlines
Dec 13
IAD5:00 amWashington, D.C. Dulles Intl
4h 54m
1 stop
STL8:54 amLambert-St Louis
Dec 16
STL6:02 pmLambert-St Louis
4h 53m
1 stop
IAD11:55 pmWashington, D.C. Dulles Intl
American Airlines
Dec 13
IAD5:00 amWashington, D.C. Dulles Intl
4h 54m
1 stop
STL8:54 amLambert-St Louis
Dec 14
STL9:34 amLambert-St Louis
6h 24m
1 stop
IAD4:58 pmWashington, D.C. Dulles Intl
American Airlines
Jan 8
IAD6:22 amWashington, D.C. Dulles Intl
10h 58m
2 stops
STL4:20 pmLambert-St Louis
Jan 10
STL7:18 amLambert-St Louis
5h 05m
1 stop
IAD1:23 pmWashington, D.C. Dulles Intl

See travel insights to St. Louis from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, January is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $283. The month of August is another great option to travel to St. Louis, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around $289.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $308. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $356. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Washington, D.C. Dulles Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $295 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $353 per ticket.

What is the cheapest Washington, D.C. Dulles Intl to Lambert-St Louis flight route?

Fly from Washington, D.C. Dulles Intl to Lambert-St Louis for the best Washington, D.C. Dulles Intl - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

The best time to book a flight to St. Louis from Washington, D.C. Dulles Intl Airport is 44 days out, which is when prices tend to be around $315. In the past 72 hours, momondo users found flights from Washington, D.C. Dulles Intl Airport to St. Louis for as low as $209.

What cabin class options are available on Washington, D.C. Dulles Intl to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to St. Louis flights?

You could potentially save up to 45% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to St. Louis flight.

How have Washington, D.C. Dulles Intl Airport to St. Louis flight prices changed over time?

As of November 2024, prices for Washington, D.C. Dulles Intl Airport to St. Louis flights are approximately 4% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. Dulles Intl Airport to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to St. Louis (IAD to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to St. Louis

Best Price Found

$63

Fastest flight time

2h 23m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Washington, D.C. Dulles Intl Airport in the past 72 hours is $63. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to St. Louis found on momondo in the last 72 hours is $128.
The fastest flight from Washington, D.C. Dulles Intl Airport to St. Louis takes 2h 23m
Direct flights go from Washington, D.C. Dulles Intl Airport to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

  • How far is Washington, D.C. Dulles Intl to Lambert-St Louis by plane?

    The straight-line distance from Washington, D.C. Dulles Intl to Lambert-St Louis is 685.9 mi. By plane, this route typically takes 2h 23m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Lambert-St Louis Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Washington, D.C. Dulles Intl Airport to St. Louis?

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to St. Louis?


Best airlines flying from Washington, D.C. Dulles Intl Airport to St. Louis

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $192Free CancellationRating
8.0
8,755 reviews
Search Delta flights
American AirlinesPriceFrom $214Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $247Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights
  • United Airlines Flights From Washington, D.C. Dulles Intl Airport to St. Louis

    United Airlines is one of the most popular airlines flying from Washington, D.C. Dulles Intl Airport to St. Louis, operating 14 flights/week on average for this route. A good United Airlines flight deal for Washington, D.C. Dulles Intl Airport to St. Louis starts from $247 round-trip, up to an average price of $500. Our users have rated United Airlines at 7.4/10.


Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to St. Louis?

It is quick and easy to find Washington, D.C. to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Washington, D.C. to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to St. Louis?

momondo provides multiple filters to help you find the best flight to St. Louis from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to St. Louis right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to St. Louis from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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