$157 Cheap Flights from White Plains (HPN) to St. Louis (STL)

View $157 flight on Tue, Nov 11, 2025Opens in a new window

Popular airlines from Westchester County Airport (HPN) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from White Plains to St. Louis (HPN-STL)

Prices were available within the past 7 days and start at $157 for one-way flights and $261 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Nov 8 - Tue, Nov 11
HPN
White Plains
STL
St. Louis
$261 Roundtrip, found 18 hours ago
$261
Roundtrip
found 18 hours ago
Select Delta flight, departing Sat, Nov 8 from White Plains to St. Louis, returning Tue, Nov 11, priced at $261 found 18 hours ago
Delta
Sun, Nov 9 - Sat, Nov 15
HPN
White Plains
STL
St. Louis
$287 Roundtrip, found 18 hours ago
$287
Roundtrip
found 18 hours ago
Select Delta flight, departing Sun, Nov 9 from White Plains to St. Louis, returning Sat, Nov 15, priced at $287 found 18 hours ago
Delta
Mon, Nov 24 - Tue, Dec 2
HPN
White Plains
STL
St. Louis
$291 Roundtrip, found 6 days ago
$291
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Nov 24 from White Plains to St. Louis, returning Tue, Dec 2, priced at $291 found 6 days ago
American Airlines
Fri, Dec 5 - Mon, Dec 8
HPN
White Plains
STL
St. Louis
$313 Roundtrip, found 1 hour ago
$313
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Dec 5 from White Plains to St. Louis, returning Mon, Dec 8, priced at $313 found 1 hour ago
American Airlines
Sat, Oct 18 - Tue, Oct 21
HPN
White Plains
STL
St. Louis
$315 Roundtrip, found 2 hours ago
$315
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sat, Oct 18 from White Plains to St. Louis, returning Tue, Oct 21, priced at $315 found 2 hours ago
Delta
Thu, Nov 6 - Tue, Nov 11
HPN
White Plains
STL
St. Louis
$317 Roundtrip, found 18 hours ago
$317
Roundtrip
found 18 hours ago
Select Delta flight, departing Thu, Nov 6 from White Plains to St. Louis, returning Tue, Nov 11, priced at $317 found 18 hours ago
Delta
Tue, Oct 21 - Fri, Oct 31
HPN
White Plains
STL
St. Louis
$318 Roundtrip, found 5 hours ago
$318
Roundtrip
found 5 hours ago
Select Delta flight, departing Tue, Oct 21 from White Plains to St. Louis, returning Fri, Oct 31, priced at $318 found 5 hours ago
Delta
Fri, Nov 7 - Tue, Nov 11
HPN
White Plains
STL
St. Louis
$319 Roundtrip, found 18 hours ago
$319
Roundtrip
found 18 hours ago
Select Delta flight, departing Fri, Nov 7 from White Plains to St. Louis, returning Tue, Nov 11, priced at $319 found 18 hours ago
Delta
Fri, Dec 5 - Mon, Dec 8
HPN
White Plains
STL
St. Louis
$325 Roundtrip, found 1 hour ago
$325
Roundtrip
found 1 hour ago
Select Delta flight, departing Fri, Dec 5 from White Plains to St. Louis, returning Mon, Dec 8, priced at $325 found 1 hour ago
Delta
Mon, Nov 24 - Fri, Nov 28
HPN
White Plains
STL
St. Louis
$329 Roundtrip, found 6 days ago
$329
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Nov 24 from White Plains to St. Louis, returning Fri, Nov 28, priced at $329 found 6 days ago

Find the cheapest month to fly from White Plains (HPN) to St. Louis (STL)

September is typically the cheapest month to fly

From $216 - $460 per traveler.

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $315
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $315
Flights from White Plains (HPN) to St. Louis (STL)
Origin airport
Westchester County
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta
Roundtrip price
$260
Distance
896 mi

White Plains to St. Louis Flights

The cheapest times to fly from White Plains to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from White Plains to St. Louis are during the month of November. You can find some of the cheapest flights from White Plains to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from White Plains to St. Louis

Sunday is one of the best days to book for cheap flights from White Plains to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from White Plains to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from White Plains to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $157 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap White Plains to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your White Plains to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $157 or cheap return flight from $261 from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from HPN to STL is November, when demand is low. Off-peak season is usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from HPN to STL. Then, sort your results by "Price (lowest to highest)" to score the best deal available.
How many flights per day from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL)?
You'll have to take a flight with a layover if you're traveling from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from HPN to STL?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a range of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your departure to book a flight from HPN to STL often results in higher prices. While you may come across some last-minute discounts, they aren't always guaranteed. Be flexible with your itinerary to boost your chances of getting a bargain.
Is it cheaper to book a HPN to STL flight and hotel package?
Opting for a HPN to STL flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our wide range of accommodations and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Westchester County Airport (HPN) to Lambert-St. Louis Intl. Airport (STL)?
Typically, it's possible to reschedule or cancel your HPN to STL flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.