$90 Cheap Flights from St. Louis (STL) to Allentown (ABE)

View $90 flight on Sun, Aug 31, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $90 for one-way flights and $234 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Aug 21 - Thu, Sep 4
STL
St. Louis
ABE
Allentown
$234 Roundtrip, found 18 hours ago
$234
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Thu, Aug 21 from St. Louis to Allentown, returning Thu, Sep 4, priced at $234 found 18 hours ago
American Airlines
Sat, Dec 13 - Tue, Dec 16
STL
St. Louis
ABE
Allentown
$239 Roundtrip, found 2 hours ago
$239
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sat, Dec 13 from St. Louis to Allentown, returning Tue, Dec 16, priced at $239 found 2 hours ago
American Airlines
Thu, Aug 21 - Thu, Sep 4
STL
St. Louis
ABE
Allentown
$244 Roundtrip, found 18 hours ago
$244
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Thu, Aug 21 from St. Louis to Allentown, returning Thu, Sep 4, priced at $244 found 18 hours ago
Delta
Tue, Sep 16 - Wed, Sep 24
STL
St. Louis
ABE
Allentown
$249 Roundtrip, found 3 hours ago
$249
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Sep 16 from St. Louis to Allentown, returning Wed, Sep 24, priced at $249 found 3 hours ago
American Airlines
Thu, Aug 21 - Thu, Sep 4
STL
St. Louis
ABE
Allentown
$254 Roundtrip, found 18 hours ago
$254
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Thu, Aug 21 from St. Louis to Allentown, returning Thu, Sep 4, priced at $254 found 18 hours ago
American Airlines
Fri, Nov 21 - Mon, Nov 24
STL
St. Louis
ABE
Allentown
$258 Roundtrip, found 3 days ago
$258
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Nov 21 from St. Louis to Allentown, returning Mon, Nov 24, priced at $258 found 3 days ago
American Airlines
Sat, Dec 13 - Tue, Dec 16
STL
St. Louis
ABE
Allentown
$261 Roundtrip, found 2 hours ago
$261
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sat, Dec 13 from St. Louis to Allentown, returning Tue, Dec 16, priced at $261 found 2 hours ago
American Airlines
Sat, Aug 16 - Sat, Aug 23
STL
St. Louis
ABE
Allentown
$263 Roundtrip, found 1 day ago
$263
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Aug 16 from St. Louis to Allentown, returning Sat, Aug 23, priced at $263 found 1 day ago
American Airlines
Wed, Aug 20 - Wed, Aug 27
STL
St. Louis
ABE
Allentown
$269 Roundtrip, found 4 days ago
$269
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug 20 from St. Louis to Allentown, returning Wed, Aug 27, priced at $269 found 4 days ago
United
Tue, Dec 16 - Thu, Dec 25
STL
St. Louis
ABE
Allentown
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 16 from St. Louis to Allentown, returning Thu, Dec 25, priced at $291 found 1 day ago

Alternative airports near Allentown

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

Select flight to Lehigh Valley Intl. ABE. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $294
ABE
Lehigh Valley Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $294
Flights from St. Louis (STL) to Allentown (ABE)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Lehigh Valley Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$233
Distance
803 mi

St. Louis to Allentown Flights

The cheapest times to fly from St. Louis to Allentown

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

 

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

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

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 Allentown in 2025. You can also book with separate airlines for your outbound and return journeys, from $90 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 Allentown 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 Allentown 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 Lehigh Valley Intl. Airport (ABE) cost?
Discover the latest flight deals from STL to ABE 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 ABE?
The cheapest flights from STL to ABE 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 ABE?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to ABE. 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 Lehigh Valley Intl. Airport (ABE)?
You'll have to take a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE). 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 STL to ABE?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*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 Lehigh Valley Intl. Airport (ABE)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE) route, aim to travel before 3 PM. Flights after this time are 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 Allentown from Lambert-St. Louis Intl. Airport (STL)?
Philadelphia Intl. Airport (PHL) is the only airport in Allentown with direct flights from Lambert-St. Louis Intl. Airport (STL). Check out your options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE) last-minute?
Booking your plane ticket from STL to ABE right before your journey is usually more expensive. However, if you're flexible with your travel times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a STL to ABE flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to ABE flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place will take the hassle out of planning your trip. Just secure your flights and select from our extensive range of stays, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE)?
If you booked your STL to ABE flight within 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 purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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*Available to One Key members.