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

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The best prices from St Louis to Washington Dulles Intl are usually found in February or September, booked 31 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

STL - IAD
Price
$271 - $344
IAD
Temperature
46.4 - 87.8 °F
IAD
Rainfall
2.5 - 4.4 inches
Popular in July High demand for flights, 12% potential price rise
Cheapest in February Best time to find cheap flights, 11% potential price drop
Round-trip from $271 From St Louis to Washington Dulles Intl
One-way from $153 One-way flight from St Louis to Washington Dulles Intl
Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.

Cheap flights from St Louis to Washington Dulles Intl in June, July 2020

The best prices found for STL to IAD flights for June, July
5 Jun - 8 Jun
$304pp
STL
Lambert-St Louis
$self.airline
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
22 May - 26 May
$306pp
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
20 May - 23 May
$314pp
STL
Lambert-St Louis
Delta
   
2 STOPS
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis

St Louis to Washington Dulles Intl 2020 flight deals

Cheap flights to Washington Dulles Intl from St Louis found for this year
25 Jul - 31 Jul
$156pp
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
5 Jul - 25 Jul
$164pp
STL
Lambert-St Louis
$self.airline
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
24 Jul - 31 Jul
$166pp
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis

Last minute flights from St Louis to Washington Dulles Intl

Late deals on round-trip flights to Washington Dulles Intl from St Louis, departing today and this week
25 May - 29 May
$306pp
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
26 May - 29 May
$314pp
STL
Lambert-St Louis
Delta
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Delta
 
1 STOP
STL
Lambert-St Louis
25 May - 29 May
$380pp
STL
Lambert-St Louis
$self.airline
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis

One-way flights to Washington Dulles Intl from St Louis

The cheapest one-way flights from St Louis to Washington Dulles Intl
11:45 am - 6:20 pm
Delta
1 Stop
5h 35m
STL - IAD
Delta
$153
Delta
5:25 am - 4:41 pm
Multiple Airlines
3 Stops
10h 16m
STL - IAD
Multiple Airlines
$5506
lastminute.com
6:15 am - 5:45 am
Linear Air Taxi
1 Stop
22h 30m
STL - IAD
Linear Air Taxi
$6811
FlightNetwork

Related info for your journey

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

Flight FAQs

From St Louis to Washington Dulles Intl

Are flight prices decreasing from St Louis to Washington Dulles Intl 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 St Louis and Washington Dulles Intl 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 St Louis to Washington Dulles Intl for under $200 on Cheapflights?

Yes, there are multiple flights from St Louis to Washington Dulles Intl for under $200. The cheapest flight booked recently is on Delta for just $156, but on average you can expect to pay $922.

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

There are no nonstop flights from St Louis to Washington Dulles Intl, 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 St Louis to Washington Dulles Intl for under $400?

There are currently 3+ open flights from St Louis to Washington Dulles Intl within the next 7 days for less than $400.

How popular is this flight route?

The Lambert-St Louis to Washington Dulles Intl flight path was viewed by 23 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What is the cheapest airline for this route?

When searching, try setting your filters to view flights for Trans States Airlines, Inc., as currently they have the cheapest options available from St Louis to Washington Dulles Intl. On average you can find 74 flights for this flight path daily.

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

When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in St Louis is roughly less than Washington Dulles Intl. You can assume this to be the case over the next 14 days.

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

Expect the weather to be around 90 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Washington Dulles Intl is generally colder than in St Louis.

Alternative routes for St Louis to Washington Dulles Intl

Destination information for Washington Dulles Intl

Things to know before you go. Useful info for your trip from St Louis to Washington Dulles Intl
Average temperature for June in Washington Dulles Intl
84.2 °F
Avg rainfall for June in Washington Dulles Intl
4.3 ″

Airports servicing St. Louis

Airports servicing Washington