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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 September, booked 48 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

$390
$350
$310
$268
Price
$268 - $367
Temperature
45 - 90 °F
Rainfall
2 - 5 inches
Most popular in April High demand for flights, 6% potential price rise
Cheapest in January Best time to find cheap flights, 1% potential price drop
Average price $336 Price for this month
Cheapest price $268 From Washington Dulles Intl to St Louis

Cheap flights from Washington Dulles Intl to St Louis in December 2019

The best prices found for IAD to STL flights for December
29 Dec - 1 Jan
$284pp
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
IAD
Washington Dulles Intl
30 Dec - 2 Jan
$292pp
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
IAD
Washington Dulles Intl
25 Dec - 31 Dec
$300pp
IAD
Washington Dulles Intl
United Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
 
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
9 Dec - 11 Dec
$433pp
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
IAD
Washington Dulles Intl
13 Dec - 17 Dec
$594pp
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
8 Dec - 13 Dec
$598pp
IAD
Washington Dulles Intl
Frontier
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
   
2 STOPS
IAD
Washington Dulles Intl

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
Flight duration
2h 14m
Average temperature for December in St Louis
46.4 °F
Avg rainfall for December in St Louis
2.5 ″

Airports servicing Washington

Airports servicing St. Louis

Weekly flight availability
from Washington Dulles Intl to St Louis
Sunday
10 daily flights
Monday
7 daily flights
Tuesday
0 flights
Wednesday
7 daily flights
Thursday
9 daily flights
Friday
8 daily flights
Saturday
0 flights

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

What days are nonstop flights available from Washington Dulles Intl to St Louis?

Nonstop flights are available for this route on the following days: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.

How popular is this flight route?

This flight path from Washington Dulles Intl to Lambert-St Louis was viewed by 17 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What percent of flights are delayed?

When booking remember that flights Washington Dulles Intl to St Louis are typically on time.

How many passenger seats are available on a flight on this route?

Commercial airlines for the flight route can seat a total of 249 passengers per day from Washington Dulles Intl to Lambert-St Louis.

What is the cheapest airline for this route?

Trans States Airlines, Inc. offers the cheapest flights from Washington Dulles Intl to St Louis. Per day you can find on average 77 flights for this route and airline.

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

Travelers can expect a nonstop flight to take approximately 3 hours, flying a distance of about 434 miles.

How many flights depart from Washington Dulles Intl to St Louis on average per day?

Travelers can expect 34 flights from Washington Dulles Intl to Lambert-St Louis on average per day.
Morning (6am - Noon) - 18% of flight departures
Afternoon (Noon - 6pm) - 50% of flight departures
Evening (6pm - Midnight) - 32% of flight departures

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.