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

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The best prices from Washington Dulles Intl to St Louis are usually found in January or February, booked 50 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

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

IAD - STL
Price
$268 - $367
STL
Temperature
44.6 - 89.6 °F
STL
Rainfall
2.2 - 5.1 inches
Popular in April High demand for flights, 11% potential price rise
Cheapest in January Best time to find cheap flights, 18% potential price drop
Average price $345 Average for round-trip flights in August 2020
Round-trip from $268 From Washington Dulles Intl to St Louis
Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Washington Dulles Intl to St Louis?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 37% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Washington Dulles Intl to St Louis?

To save on the cost of your flight from Washington Dulles Intl to St Louis, book at least 61 days before your planned departure. Booking around this time can save you about 27% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $164 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $181.

When is the cheapest time to fly from Washington Dulles Intl to St Louis (IAD - STL)?

It’s optimal to fly from Washington Dulles Intl to St Louis in the noon. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the afternoon.

Cheap flights from Washington Dulles Intl to St Louis in August, September 2020

The best prices found for IAD to STL flights for August, September
6 Aug - 11 Aug
$160pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
IAD
Washington Dulles Intl
4 Aug - 11 Aug
$161pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
8 Aug - 19 Aug
$166pp
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl

Washington Dulles Intl to St Louis 2020 flight deals

Cheap flights to St Louis from Washington Dulles Intl found for this year
6 Aug - 11 Aug
$160pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
IAD
Washington Dulles Intl
4 Aug - 12 Aug
$161pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl
8 Aug - 19 Aug
$166pp
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl

Last minute flights from Washington Dulles Intl to St Louis

Late deals on round-trip flights to St Louis from Washington Dulles Intl, departing today and this week
28 Jul - 8 Sep
$230pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
IAD
Washington Dulles Intl
28 Jul - 1 Aug
$234pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
IAD
Washington Dulles Intl
27 Jul - 3 Aug
$236pp
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl

One-way flights to St Louis from Washington Dulles Intl

The cheapest one-way flights from Washington Dulles Intl to St Louis
3:15 am - 12:09 pm
Multiple Airlines
2 Stops
9h 54m
IAD - STL
Multiple Airlines
$442
United
6:55 am - 3:49 pm
Delta
2 Stops
9h 54m
IAD - STL
Delta
$729
Delta
1:00 pm - 5:45 am
Linear Air Taxi
1 Stop
17h 45m
IAD - STL
Linear Air Taxi
$5222
Vayama

Related info for your journey

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

Flight FAQs

From Washington Dulles Intl to St Louis

Are flight prices decreasing from Washington Dulles Intl to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Washington Dulles Intl and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Washington Dulles Intl to St Louis for under $200 on Cheapflights?

Yes, there are multiple flights from Washington Dulles Intl to St Louis for under $200. The cheapest flight booked recently is on Multiple Airlines for just $160, but on average you can expect to pay $203.

Are there nonstop flights from Washington Dulles Intl to St Louis for under $200 on Cheapflights?

There are no nonstop flights from Washington Dulles Intl to St Louis, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from Washington Dulles Intl to St Louis for under $300?

There are currently 20+ open flights from Washington Dulles Intl to St Louis within the next 7 days for less than $300.

Does it rain more in Washington Dulles Intl or St Louis?

Washington Dulles Intl will have greater rainfall in 0 compared to St Louis over the next 14 days.

Is Washington Dulles Intl weather warmer or cooler than St Louis?

Our data indicates that the weather will be 90 °F on average in the month of July. The temperature in St Louis is typically hotter than in Washington Dulles Intl. If you're traveling when the temperature is at its warmest, push to plan early, as flight price and availability will have an impact on your travels. For the best results, search for flights well in advance or after peak season.

How long is the flight from Washington Dulles Intl to St Louis?

Delta can get you from Washington Dulles Intl to St Louis in just under 4h 04m. Your travel time can differ by up to .

What is the cheapest airline to fly from Washington Dulles Intl to St Louis round-trip?

Our cheapest airline available from Washington Dulles Intl to St Louis is Delta. Our recent data shows that you can find tickets from as low as $166 on this airline. You may be able to fly from Washington Dulles Intl to St Louis for 49% less than the average price by searching for this airline.

What are the cheapest airlines to fly from Washington Dulles Intl to St Louis one-way?

$83 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Linear Air Taxi, with prices from $5080.

Alternative routes for Washington Dulles Intl to St Louis

Destination information for St Louis

Things to know before you go. Useful info for your trip from Washington Dulles Intl to St Louis
Average temperature for August in St Louis
89.6 °F
Avg rainfall for August in St Louis
2.9 ″

Airports servicing Washington

Airports servicing St. Louis

Hourly flight availability from Washington Dulles Intl to St Louis

Afternoon Noon to 6 PM 75% of IAD to STL departures
Morning 6 AM to noon 25% of IAD to STL departures
Early morning Midnight to 6 AM 0% of IAD to STL departures
Evening 6 PM to midnight 0% of IAD to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Washington Dulles Intl to St Louis
Sunday
4 daily flights
Monday
4 daily flights
Tuesday
4 daily flights
Wednesday
4 daily flights
Thursday
4 daily flights
Friday
4 daily flights
Saturday
4 daily flights
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