$125 Cheap Flights from Allentown (ABE) to St. Louis (STL)

View $125 flight on Mon, Nov 24, 2025Opens in a new window

Popular airlines from Lehigh Valley Intl. Airport (ABE) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Allentown to St. Louis (ABE-STL)

Prices were available within the past 7 days and start at $125 for one-way flights and $229 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Nov 13 - Sun, Nov 16
ABE
Allentown
STL
St. Louis
$229 Roundtrip, found 5 days ago
$229
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Nov 13 from Allentown to St. Louis, returning Sun, Nov 16, priced at $229 found 5 days ago
Delta
Sat, Feb 14 - Sat, Feb 21
ABE
Allentown
STL
St. Louis
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Feb 14 from Allentown to St. Louis, returning Sat, Feb 21, priced at $249 found 1 day ago
Delta
Sat, Oct 25 - Wed, Nov 5
ABE
Allentown
STL
St. Louis
$254 Roundtrip, found 21 hours ago
$254
Roundtrip
found 21 hours ago
Select Delta flight, departing Sat, Oct 25 from Allentown to St. Louis, returning Wed, Nov 5, priced at $254 found 21 hours ago
American Airlines
Thu, Nov 13 - Sun, Nov 16
ABE
Allentown
STL
St. Louis
$258 Roundtrip, found 5 days ago
$258
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Nov 13 from Allentown to St. Louis, returning Sun, Nov 16, priced at $258 found 5 days ago
American Airlines
Thu, Jan 1 - Mon, Jan 5
ABE
Allentown
STL
St. Louis
$269 Roundtrip, found 5 days ago
$269
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Jan 1 from Allentown to St. Louis, returning Mon, Jan 5, priced at $269 found 5 days ago
Delta
Fri, Dec 12 - Thu, Dec 25
ABE
Allentown
STL
St. Louis
$274 Roundtrip, found 5 hours ago
$274
Roundtrip
found 5 hours ago
Select Delta flight, departing Fri, Dec 12 from Allentown to St. Louis, returning Thu, Dec 25, priced at $274 found 5 hours ago
Delta
Wed, Oct 22 - Wed, Nov 5
ABE
Allentown
STL
St. Louis
$279 Roundtrip, found 2 hours ago
$279
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Oct 22 from Allentown to St. Louis, returning Wed, Nov 5, priced at $279 found 2 hours ago
United
Fri, Oct 24 - Sun, Oct 26
ABE
Allentown
STL
St. Louis
$284 Roundtrip, found 1 day ago
$284
Roundtrip
found 1 day ago
Select United flight, departing Fri, Oct 24 from Allentown to St. Louis, returning Sun, Oct 26, priced at $284 found 1 day ago
Delta
Sat, Feb 14 - Thu, Feb 19
ABE
Allentown
STL
St. Louis
$294 Roundtrip, found 1 day ago
$294
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Feb 14 from Allentown to St. Louis, returning Thu, Feb 19, priced at $294 found 1 day ago
American Airlines
Thu, Nov 13 - Sun, Nov 16
ABE
Allentown
STL
St. Louis
$298 Roundtrip, found 5 days ago
$298
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Nov 13 from Allentown to St. Louis, returning Sun, Nov 16, priced at $298 found 5 days ago

Find the cheapest month to fly from Allentown (ABE) to St. Louis (STL)

May is typically the cheapest month to fly

From $189 - $708 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 $457
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $457

Frequently asked questions

How much does a flight from Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $125 or cheap return flight from $229 from Lehigh Valley Intl. Airport (ABE) 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 Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL)?
Planning your trip for November may help you find better deals, as it's the cheapest month for flights between ABE and STL. You'll often find the lowest fares during off-peak months.
Which airlines fly direct from Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL)?
There are no direct routes from Allentown, PA (ABE-Lehigh Valley Intl.) to Lambert-St. Louis Intl. Airport (STL). However, you can find other airports that have nonstop flights. Start your journey at Philadelphia Intl. Airport (PHL) and travel straight to St. Louis without a layover.
What is the cheapest airline that flies from Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from ABE to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights departing from Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from ABE to STL?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can vary based on the time of year, 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 Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Later departures 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 Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from ABE to STL are usually more expensive. To lock in the lowest rates, start searching for flights ahead of time. That being said, if you can play around with your travel dates, it's possible to find a cheap fare right before you leave.
Is it cheaper to book an ABE to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking an ABE to STL flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place takes the hassle out of planning your trip. Simply secure your flights and select from our extensive range of stays, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Lehigh Valley Intl. Airport (ABE) to Lambert-St. Louis Intl. Airport (STL)?
It's generally possible to reschedule or cancel your ABE to STL flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Lehigh Valley Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$228
Distance
803 mi

Book with confidence

Allentown to St. Louis Flights

The cheapest times to fly from Allentown 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 Allentown to St. Louis are during the month of November. You can find some of the cheapest flights from Allentown to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Allentown to St. Louis

Sunday is one of the best days to book for cheap flights from Allentown 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 Allentown 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 Allentown to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $125 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 Allentown 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 Allentown 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.

 

Allentown to St. Louis Flights

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*Available to One Key members.