Cheap flights from St. Louis (STL) to Dulles Intl (IAD)
How to find the cheapest flight from St. Louis (STL) to Dulles Intl (IAD)
All the information you need to plan the best STL to IAD flight in 2022: compare St. Louis to Dulles Intl flight prices with the expected peak season, weather and rainfall in Dulles Intl.
STL - IAD Price | $187 - $511 |
|---|---|
IAD Temperature | 35.6 - 80.6 °F |
IAD Rainfall | 2.6 - 4 inches |
| Popular in | June | High demand for flights, 37% potential price rise |
|---|---|---|
| Cheapest in | February | Best time to find cheap flights, 42% potential price drop |
| Round-trip from | $187 | From Lambert-St Louis to Washington, D.C. Dulles Intl |
| One-way from | $93 | One-way flight from Lambert-St Louis to Washington, D.C. Dulles Intl |
How far in advance should I book a flight from St. Louis to Washington, D.C. Dulles Intl Airport?
To save on the cost of your flight from St. Louis to Washington, D.C. Dulles Intl Airport, book at least 42 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 $325 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $392.
What is the cheapest month to fly from St. Louis to Washington, D.C. Dulles Intl Airport?
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, October can be a great choice for travel to Washington, D.C. Dulles Intl Airport. Flights to Washington, D.C. Dulles Intl Airport from St. Louis in October are about $286 on average during October, but can be found for as low as $157.
When is the cheapest time to fly from St. Louis to Washington, D.C. Dulles Intl Airport (STL - IAD)?
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Washington, D.C. Dulles Intl Airport as you normally would.
Cheap flights from St. Louis to Dulles Intl in August, September 2022
The best prices found for STL to IAD flights for August, September
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
Nonstop
2h 19mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
6h 50mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
4h 16mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
6h 59mMultiple Airlines
St. Louis to Dulles Intl 2022 flight deals
Cheap flights to Dulles Intl from St. Louis found for this year
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
Nonstop
2h 19mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
6h 50mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
4h 16mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
6h 59mMultiple Airlines
Cheap United Airlines flights from St. Louis to Dulles Intl
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
Nonstop
2h 19mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
6h 50mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
Nonstop
2h 19mUnited Airlines
Cheap Delta flights from St. Louis to Dulles Intl
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
4h 40mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
3h 57mDelta
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
4h 01mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
7h 09mDelta
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
3h 33mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
3h 57mDelta
Non-stop flights to Dulles Intl from St. Louis
Save time with St. Louis to Dulles Intl direct flight deals
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
Nonstop
2h 19mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
Nonstop
2h 19mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
Nonstop
2h 19mUnited Airlines
Last minute flights from St. Louis to Dulles Intl
Late deals on return flights to Dulles Intl from St. Louis, departing today and this week
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
5h 33mMultiple Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
4h 19mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
5h 33mAmerican Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
5h 06mWashington, D.C. Dulles Intl
Lambert-St Louis
1 stop
4h 02mDelta
One-way flights to Dulles Intl from St. Louis
The cheapest one-way flights from St. Louis to Dulles Intl
Lambert-St Louis
Washington, D.C. Dulles Intl
1 stop
6h 50mDelta
Lambert-St Louis
Washington, D.C. Dulles Intl
Nonstop
2h 10mUnited Airlines
Lambert-St Louis
Washington, D.C. Dulles Intl
2 stops
42h 36mMultiple Airlines
Related info for your journey
Useful info, stats and facts about St. Louis to Dulles Intl flights.
What airport do you fly from for flights from St. Louis to Washington, D.C. Dulles Intl?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Washington, D.C. Dulles Intl. On average, Lambert-St Louis has 3 outbound flights to Washington, D.C. Dulles Intl per day from 4 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
Which airlines flying from Lambert-St Louis to Washington, D.C. Dulles Intl have flexible cancellations due to COVID-19?
Due to the rapidly changing circumstances due to COVID-19, airlines like United Airlines, American Airlines, and Delta flying from Lambert-St Louis to Washington, D.C. Dulles Intl have implemented new flexible cancellation policies.
Can I find flights from St. Louis to Washington, D.C. Dulles Intl Airport for under $300 on Cheapflights?
Yes, there are multiple flights from St. Louis to Washington, D.C. Dulles Intl Airport for under $300. The cheapest flight booked recently is on United Airlines for just $225, but on average you can expect to pay $277.
Are there nonstop flights from St. Louis to Washington, D.C. Dulles Intl Airport for under $300 on Cheapflights?
Cheapflights has at least 20 direct flights from St. Louis to Washington, D.C. Dulles Intl Airport under $300. A good price for a nonstop flight from St. Louis to Washington, D.C. Dulles Intl Airport is less than $352.
Are there last-minute flights available from St. Louis to Washington, D.C. Dulles Intl Airport for under $400?
There are currently 20+ open flights from St. Louis to Washington, D.C. Dulles Intl Airport within the next 7 days for less than $400.
What are the cheapest airlines flying from St. Louis to Washington, D.C. Dulles Intl Airport round-trip?
Currently priced at $225, United Airlines will fly you from St. Louis to Washington, D.C. Dulles Intl Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Delta - these airlines can fly you to your destination from $253 and $278, respectively. United Airlines is 30% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from St. Louis to Washington, D.C. Dulles Intl Airport one-way?
To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $93. United Airlines flights start at $98 while deals on American Airlines start at $127 one-way.
What are the most popular airlines that fly from St. Louis to Washington, D.C. Dulles Intl Airport?
Undisclosed Carrier, American Airlines and Delta are the most popular airlines when flying from St. Louis to Washington, D.C. Dulles Intl Airport.
What are the most reliable airlines from St. Louis to Washington, D.C. Dulles Intl Airport?
No one likes to see their flight delayed. When booking a flight from St. Louis to Washington, D.C. Dulles Intl Airport consider choosing GoJet (92%), Copa Airlines (91%) or Avianca (84%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from St. Louis to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay $300 for a flight from St. Louis to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $162 while the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl) is currently priced at $234.
Other flights from St. Louis
Flights to Dulles Intl from St. Louis
Alternative routes for St. Louis to Dulles Intl
See prices for flight routes from nearby airports that may be better suited for you.
Top 3 airlines flying from St. Louis to Dulles Intl
The chart below displays the airlines Cheapflights users traveling from St. Louis to Dulles Intl choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Hourly flight availability from St. Louis to Dulles Intl
See what time of day planes typically take off from St. Louis to Dulles Intl
| 0%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 100%of flight departures | Morning6 am to noon |
| 0%of flight departures | AfternoonNoon to 6 pm |
| 0%of flight departures | Evening6 pm to midnight |
Weekly flight availability from St. Louis to Dulles Intl
See how many times per day planes take to the skies headed from St. Louis to Dulles Intl
| Sunday | 4daily flights |
|---|---|
| Monday | 4daily flights |
| Tuesday | 2daily flights |
| Wednesday | 4daily flights |
| Thursday | 2daily flights |
| Friday | 4daily flights |
| Saturday | 3daily flights |