$175 Cheap Flights from St. Louis (STL) to Allentown (ABE)

View $175 flight on Thu, Jan 1, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $175 for one-way flights and $249 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, Dec 12 - Tue, Dec 16
STL
St. Louis
ABE
Allentown
$249 Roundtrip, found 8 hours ago
$249
Roundtrip
found 8 hours ago
Select Delta flight, departing Fri, Dec 12 from St. Louis to Allentown, returning Tue, Dec 16, priced at $249 found 8 hours ago
United
Tue, Mar 31 - Sat, Apr 4
STL
St. Louis
ABE
Allentown
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select United flight, departing Tue, Mar 31 from St. Louis to Allentown, returning Sat, Apr 4, priced at $249 found 1 day ago
Delta
Sat, Nov 15 - Sat, Nov 22
STL
St. Louis
ABE
Allentown
$264 Roundtrip, found 1 hour ago
$264
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, Nov 15 from St. Louis to Allentown, returning Sat, Nov 22, priced at $264 found 1 hour ago
Delta
Sat, Nov 15 - Tue, Nov 18
STL
St. Louis
ABE
Allentown
$279 Roundtrip, found 1 hour ago
$279
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, Nov 15 from St. Louis to Allentown, returning Tue, Nov 18, priced at $279 found 1 hour ago
United
Tue, Mar 31 - Sat, Apr 4
STL
St. Louis
ABE
Allentown
$280 Roundtrip, found 1 day ago
$280
Roundtrip
found 1 day ago
Select United flight, departing Tue, Mar 31 from St. Louis to Allentown, returning Sat, Apr 4, priced at $280 found 1 day ago
Delta
Sun, Feb 15 - Tue, Mar 3
STL
St. Louis
ABE
Allentown
$288 Roundtrip, found 3 days ago
$288
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Feb 15 from St. Louis to Allentown, returning Tue, Mar 3, priced at $288 found 3 days ago
Delta
Sat, Nov 8 - Thu, Nov 27
STL
St. Louis
ABE
Allentown
$294 Roundtrip, just found
$294
Roundtrip
just found
Select Delta flight, departing Sat, Nov 8 from St. Louis to Allentown, returning Thu, Nov 27, priced at $294 just found
United
Sun, Nov 16 - Mon, Nov 24
STL
St. Louis
ABE
Allentown
$295 Roundtrip, found 1 day ago
$295
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 16 from St. Louis to Allentown, returning Mon, Nov 24, priced at $295 found 1 day ago
Delta
Wed, Nov 5 - Thu, Nov 27
STL
St. Louis
ABE
Allentown
$309 Roundtrip, just found
$309
Roundtrip
just found
Select Delta flight, departing Wed, Nov 5 from St. Louis to Allentown, returning Thu, Nov 27, priced at $309 just found
American Airlines
Sat, Dec 13 - Tue, Dec 16
STL
St. Louis
ABE
Allentown
$365 Roundtrip, found 1 day ago
$365
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Dec 13 from St. Louis to Allentown, returning Tue, Dec 16, priced at $365 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 $264
ABE
Lehigh Valley Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $264

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE) cost?
Grab a cheap one-way flight from $175 or cheap return flight from $249 from Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE) 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 Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE)?
December is the most affordable month to fly from STL to ABE. Timing your trip outside of the busy season is often the key to finding better deals on flights.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Lehigh Valley Intl. Airport (ABE)?
To find the cheapest airline that'll fly you from STL to ABE, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
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.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Lehigh Valley Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$248
Distance
803 mi

Book with confidence

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 December. 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 $175 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.

 

St. Louis to Allentown Flights

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