Cheap flights from Dulles Intl (IAD) to St. Louis (STL)

IAD — STL
Dec 3 — Dec 101

How to find the cheapest flight from Dulles Intl (IAD) to St. Louis (STL)

All the information you need to plan the best IAD to STL flight in 2022: compare Dulles Intl to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

IAD - STL

Price

$202 - $615

STL

Temperature

32 - 80.6 °F

STL

Rainfall

2.2 - 4.7 inches

Popular inJulyHigh demand for flights, 38% potential price rise
Cheapest inJanuaryBest time to find cheap flights, 47% potential price drop
Round-trip from$202From Washington, D.C. Dulles Intl to Lambert-St Louis
One-way from$180One-way flight from Washington, D.C. Dulles Intl to Lambert-St Louis

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 32 days in advance, which can save you up to 24% on flights from Washington, D.C. Dulles Intl Airport to St. Louis compared to booking the week you need them. Waiting 32 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $352. For sooner than that we have options available in the next 3 days from $403.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to St. Louis?

The best pricing can be found in the month of January. Prices to St. Louis from Washington, D.C. Dulles Intl Airport average $333. You can even find prices in January for less than $333, as users have found deals to St. Louis from as low as $157. The month of June appears to be one of the more expensive times to travel to St. Louis from Washington, D.C. Dulles Intl Airport. Flying in the targeted month can save you up to 19%.

When is the cheapest time to fly from Washington, D.C. Dulles Intl Airport to St. Louis (IAD - STL)?

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

Cheap flights from Dulles Intl to St. Louis in November, December 2022

The best prices found for IAD to STL flights for November, December
Dec 29 - Jan 4
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 12m
$202

United Airlines

Pick Dates

Deal found 11/27

Dec 10 - Dec 11
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

4h 43m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 05m
$209

Multiple Airlines

Pick Dates

Deal found 11/26

Dec 29 - Jan 3
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

1 stop

4h 52m
$211

United Airlines

Pick Dates

Deal found 11/27

Dulles Intl to St. Louis 2022 flight deals

Cheap flights to St. Louis from Dulles Intl found for this year
Dec 29 - Jan 4
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 12m
$202

United Airlines

Pick Dates

Deal found 11/27

Dec 10 - Dec 11
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

4h 43m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 05m
$209

Multiple Airlines

Pick Dates

Deal found 11/26

Dec 29 - Jan 3
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

1 stop

4h 52m
$211

United Airlines

Pick Dates

Deal found 11/27

Cheap United Airlines flights from Dulles Intl to St. Louis

Dec 29 - Jan 3
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 07m
$202

United Airlines

Pick Dates

Deal found 11/25

Dec 29 - Jan 3
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

1 stop

4h 52m
$211

United Airlines

Pick Dates

Deal found 11/25

Dec 29 - Jan 3
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 07m
$216

United Airlines

Pick Dates

Deal found 11/27

Cheap American Airlines flights from Dulles Intl to St. Louis

Dec 10 - Dec 13
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

4h 43m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

1 stop

3h 46m
$217

American Airlines

Pick Dates

Deal found 11/26

Jan 7 - Jan 10
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

4h 45m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

1 stop

3h 51m
$257

American Airlines

Pick Dates

Deal found 11/27

Jan 11 - Jan 16
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

4h 45m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

1 stop

3h 51m
$297

American Airlines

Pick Dates

Deal found 11/27

Non-stop flights to St. Louis from Dulles Intl

Save time with Dulles Intl to St. Louis direct flight deals
Dec 29 - Jan 4
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 12m
$202

United Airlines

Pick Dates

Deal found 11/27

Dec 29 - Jan 3
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 07m
$216

United Airlines

Pick Dates

Deal found 11/27

Dec 28 - Jan 4
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 32m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 12m
$232

United Airlines

Pick Dates

Deal found 11/27

Last minute flights from Dulles Intl to St. Louis

Late deals on return flights to St. Louis from Dulles Intl, departing today and this week
Dec 6 - Jan 5
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 22m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 12m
$314

United Airlines

Pick Dates

Deal found 11/28

Dec 8 - Dec 12
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

6h 06m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 00m
$321

Multiple Airlines

Pick Dates

Deal found 11/28

Dec 6 - Jan 5
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

7h 20m
STL

Lambert-St Louis

IAD

Washington, D.C. Dulles Intl

Nonstop

2h 12m
$323

United Airlines

Pick Dates

Deal found 11/28

One-way flights to St. Louis from Dulles Intl

The cheapest one-way flights from Dulles Intl to St. Louis
Dec 15
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

Nonstop

2h 30m
$101

United Airlines

Pick Dates

Deal found 11/25

Jan 11
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

2 stops

29h 44m
$106

Multiple Airlines

Pick Dates

Deal found 11/25

Dec 10
IAD

Washington, D.C. Dulles Intl

STL

Lambert-St Louis

1 stop

4h 39m
$109

American Airlines

Pick Dates

Deal found 11/26

Related info for your journey

Useful info, stats and facts about Dulles Intl to St. Louis flights.

What airport do you fly into for flights to St. Louis from Washington, D.C. Dulles Intl?

If you book a flight to St. Louis from Washington, D.C. Dulles Intl, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 7 flights from Washington, D.C. Dulles Intl to Lambert-St Louis per day from 4 different airlines.

Which airlines flying from Washington, D.C. Dulles Intl to Lambert-St Louis have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Washington, D.C. Dulles Intl to Lambert-St Louis that may be offering flexible cancellation policies are United Airlines, American Airlines, and Delta. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from Washington, D.C. Dulles Intl Airport to St. Louis for under $300 on Cheapflights?

Yes, there are multiple flights from Washington, D.C. Dulles Intl Airport to St. Louis for under $300. The cheapest flight booked recently is on United Airlines for just $202, but on average you can expect to pay $236.

Are there nonstop flights from Washington, D.C. Dulles Intl Airport to St. Louis for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from Washington, D.C. Dulles Intl Airport to St. Louis under $300. A good price for a nonstop flight from Washington, D.C. Dulles Intl Airport to St. Louis is less than $288.

Are there last-minute flights available from Washington, D.C. Dulles Intl Airport to St. Louis for under $400?

There are currently 20+ open flights from Washington, D.C. Dulles Intl Airport to St. Louis within the next 7 days for less than $400.

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to St. Louis round-trip?

Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to St. Louis round-trip from $202. Other airlines that can offer you cheap pricing are American Airlines, from $217, and Delta, from $220. These flights start at 47% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to St. Louis one-way?

The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to St. Louis are United Airlines ($101), American Airlines ($109), and Delta ($110).

What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to St. Louis?

Undisclosed Carrier, American Airlines and Delta are the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to St. Louis.

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

Consider Scandinavian Airlines (97%), Avianca (97%) or CommutAir (94%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to St. Louis.

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

Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to St. Louis? While on average our users pay $664, our data indicates the cheapest price to be $133. The most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis), is priced around $216.

Alternative routes for Dulles Intl to St. Louis

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

Top 3 airlines flying from Dulles Intl to St. Louis

The chart below displays the airlines Cheapflights users traveling from Dulles Intl to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
United AirlinesCheapest$187Average$407FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
American AirlinesCheapest$201Average$392FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
DeltaCheapest$206Average$431FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights

Hourly flight availability from Dulles Intl to St. Louis

See what time of day planes typically take off from Dulles Intl to St. Louis
1%of flight departuresEarly morningMidnight to 6 am
9%of flight departuresMorning6 am to noon
90%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Dulles Intl to St. Louis

See how many times per day planes take to the skies headed from Dulles Intl to St. Louis
Sunday7daily flights
Monday7daily flights
Tuesday6daily flights
Wednesday8daily flights
Thursday8daily flights
Friday8daily flights
Saturday7daily flights