$85 Cheap Flights from Washington (IAD) to St. Louis (STL)

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Flight deals we found

These prices are lower than our typical predictions for similar flights.
60% less than typical
$479
Roundtrip per traveler
Thu, May 9 - Sun, May 12
UnitedUnited
2h 27m
8:32am
9:59am
IAD
Nonstop
STL
Found 23 hours ago
60% less than typical
$479
Roundtrip per traveler
Wed, May 8 - Thu, May 9
UnitedUnited
2h 27m
8:32am
9:59am
IAD
Nonstop
STL
Found 19 hours ago
75% less than typical
$278
Roundtrip per traveler
Fri, Jun 7 - Sun, Jun 9
DeltaDelta
4h 10m
6:00am
9:10am
IAD
1 stop • 37m in ATL
STL
Found 6 hours ago
75% less than typical
$277
Roundtrip per traveler
Sat, Jul 27 - Thu, Aug 1
DeltaDelta
5h 31m
7:13pm
11:44pm
IAD
1 stop • 1h 48m in ATL
STL
Found 6 hours ago
70% less than typical
$334
Roundtrip per traveler
Sun, May 19 - Sat, May 25
DeltaDelta
4h 19m
6:00am
9:19am
IAD
1 stop • 1h 10m in DTW
STL
Found 19 hours ago
70% less than typical
$357
Roundtrip per traveler
Fri, Jul 26 - Thu, Aug 1
American AirlinesAmerican Airlines
4h 34m
1:22pm
4:56pm
IAD
1 stop • 1h 6m in CLT
STL
Found 6 hours ago
65% less than typical
$379
Roundtrip per traveler
Mon, Jul 29 - Thu, Aug 1
American AirlinesAmerican Airlines
4h 44m
8:10pm
11:54pm
IAD
1 stop • 1h 5m in CLT
STL
Found 23 hours ago
65% less than typical
$433
Roundtrip per traveler
Mon, May 13 - Fri, May 17
UnitedUnited
4h 29m
6:45am
10:14am
IAD
1 stop • 56m in ORD
STL
Found 10 hours ago

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Cheap Flights from Washington to St. Louis (IAD-STL)

Prices were available within the past 7 days and start at $85 for one-way flights and $178 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
United
Delta
United
Delta
United
United
United
United
Delta
Flights from Washington (IAD) to St. Louis (STL)
Origin airport
Washington Dulles Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Sun Country Airlines, United
Roundtrip price
$177
Distance
694 mi
Average flight time
1 hour 28 mins

Washington to St. Louis Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Washington to St. Louis offer the perfect respite. Not only does exploring St. Louis provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from Washington to St. Louis may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from IAD to STL today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of St. Louis are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to St. Louis more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to St. Louis is $85 now!

Frequently asked questions

How much is a flight from Dulles Intl. Airport to Lambert-St. Louis Intl. Airport (STL)?
Round-trip tickets from IAD to St. Louis Lambert International Airport start from $178. This price is based on fares listed within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP so you don’t miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from IAD to Lambert-St. Louis Intl. Airport (STL)?
When it comes to cancellation fees, every airline has its own terms and conditions. If you decide to cancel your vacation, head to our Customer Service Portal.
How do I find cheap flights from IAD to Lambert-St. Louis Intl. Airport (STL) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for Dulles Intl. Airport to Lambert Field flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from IAD to STL?
The distance from Dulles Intl. Airport (IAD) to Lambert-St. Louis Intl. Airport (STL) (STL) is just 684 mi. You’ll be stepping off the plane and grabbing your bags from the carousel before long.
Which airlines fly direct from Dulles Intl. Airport to Lambert Field?
A popular option with many travelers, United Airlines (UA) operates 60 monthly flights from IAD to STL. Pick the one that fits with your travel plans and book your fare today.
Are Dulles Intl. Airport to Lambert-St. Louis Intl. Airport (STL) flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Washington Dulles Intl. Airport (IAD) to STL can be hit-or-miss. It is possible to score a bargain, but you could also miss out entirely! If you’d prefer to play it safe and start your travel planning early on, Expedia compares flight deals up to 12 months in advance. Just bear in mind that not all airlines issue their prices that far in advance. Our top tip? Check back often as updates are made frequently.
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