$109 Cheap Flights from St. Louis (STL) to White Plains (HPN)

View $109 flight on Mon, Sep 8, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $109 for one-way flights and $261 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Aug 27 - Sat, Aug 30
STL
St. Louis
HPN
White Plains
$261 Roundtrip, found 2 hours ago
$261
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Aug 27 from St. Louis to White Plains, returning Sat, Aug 30, priced at $261 found 2 hours ago
Delta
Wed, Aug 6 - Tue, Aug 12
STL
St. Louis
HPN
White Plains
$271 Roundtrip, found 1 day ago
$271
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Aug 6 from St. Louis to White Plains, returning Tue, Aug 12, priced at $271 found 1 day ago
Delta
Tue, Oct 14 - Wed, Oct 15
STL
St. Louis
HPN
White Plains
$277 Roundtrip, found 6 hours ago
$277
Roundtrip
found 6 hours ago
Select Delta flight, departing Tue, Oct 14 from St. Louis to White Plains, returning Wed, Oct 15, priced at $277 found 6 hours ago
Delta
Sun, Aug 31 - Sat, Sep 6
STL
St. Louis
HPN
White Plains
$281 Roundtrip, found 2 hours ago
$281
Roundtrip
found 2 hours ago
Select Delta flight, departing Sun, Aug 31 from St. Louis to White Plains, returning Sat, Sep 6, priced at $281 found 2 hours ago
Delta
Thu, Aug 28 - Sat, Aug 30
STL
St. Louis
HPN
White Plains
$287 Roundtrip, found 2 hours ago
$287
Roundtrip
found 2 hours ago
Select Delta flight, departing Thu, Aug 28 from St. Louis to White Plains, returning Sat, Aug 30, priced at $287 found 2 hours ago
Delta
Tue, Jul 8 - Sat, Jul 26
STL
St. Louis
HPN
White Plains
$288 Roundtrip, found 4 days ago
$288
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Jul 8 from St. Louis to White Plains, returning Sat, Jul 26, priced at $288 found 4 days ago
Delta
Sun, Aug 31 - Thu, Sep 11
STL
St. Louis
HPN
White Plains
$289 Roundtrip, found 2 hours ago
$289
Roundtrip
found 2 hours ago
Select Delta flight, departing Sun, Aug 31 from St. Louis to White Plains, returning Thu, Sep 11, priced at $289 found 2 hours ago
Delta
Wed, Aug 27 - Tue, Sep 2
STL
St. Louis
HPN
White Plains
$292 Roundtrip, found 2 hours ago
$292
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Aug 27 from St. Louis to White Plains, returning Tue, Sep 2, priced at $292 found 2 hours ago
Delta
Mon, Aug 11 - Sat, Aug 16
STL
St. Louis
HPN
White Plains
$297 Roundtrip, found 1 day ago
$297
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Aug 11 from St. Louis to White Plains, returning Sat, Aug 16, priced at $297 found 1 day ago
American Airlines
Sat, Oct 11 - Tue, Oct 14
STL
St. Louis
HPN
White Plains
$299 Roundtrip, found 6 hours ago
$299
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Sat, Oct 11 from St. Louis to White Plains, returning Tue, Oct 14, priced at $299 found 6 hours ago

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

August is typically the cheapest month to fly

From $208 - $467 per traveler.

Graph displaying average flight prices per month

Flights from St. Louis (STL) to White Plains (HPN)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Westchester County
Airlines serving
American Airlines, Delta
Roundtrip price
$260
Distance
896 mi

St. Louis to White Plains Flights

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

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 St. Louis to White Plains are during the month of August. You can find some of the cheapest flights from St. Louis to White Plains with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to White Plains: 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 St. Louis to White Plains

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 St. Louis to White Plains in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 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 St. Louis to White Plains 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 St. Louis to White Plains 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 Lambert-St. Louis Intl. Airport (STL) to Westchester County Airport (HPN) cost?
Discover the latest flight deals from STL to HPN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to HPN?
The cheapest flights from STL to HPN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to HPN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to HPN. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Westchester County Airport (HPN)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Westchester County Airport (HPN) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to HPN?
Generally you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* But this can vary depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Westchester County Airport (HPN)?
Select a flight from Lambert-St. Louis Intl. Airport (STL) to Westchester County Airport (HPN) that takes off before 3 PM to reduce the likelihood of delays. Departures after this time are on average 22% more likely to be canceled.**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.
What airports do you fly into for White Plains from Lambert-St. Louis Intl. Airport (STL)?
If you're leaving on a direct flight from Lambert-St. Louis Intl. Airport (STL) to White Plains, you can arrive at either LaGuardia Airport (LGA) or Liberty Intl. Airport (EWR).
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Westchester County Airport (HPN) last-minute?
Waiting until just before your departure to book your flight from STL to HPN often results in higher prices. While you might find some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible to maximize your chances of snagging a bargain.
Is it cheaper to book a STL to HPN flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to HPN flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place takes the hassle out of planning your trip. Simply secure your flights and choose from our wide range of stays, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Westchester County Airport (HPN)?
If you booked your STL to HPN flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

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*Available to One Key members.