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Allentown

$349+ Cheap flights from St. Louis to Allentown (STL - ABE)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ABE
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from St. Louis to Allentown

Cheapest flights from St. Louis to Allentown
Explore the most affordable flight options available from St. Louis to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.

This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/109:57 am
STL
-
ABE
1 stop5h 25m
United Airlines
Sat 2/142:55 pm
ABE
-
STL
1 stop7h 10m
United Airlines
Deal found 1/26$349
This Delta deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/153:42 pm
STL
-
ABE
1 stop6h 14m
Delta
Mon 7/206:30 am
ABE
-
STL
1 stop7h 23m
Delta
Deal found 1/26$376
This United Airlines deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1811:25 am
STL
-
ABE
1 stop21h 36m
United Airlines
Sat 2/212:55 pm
ABE
-
STL
1 stop7h 10m
United Airlines
Deal found 1/25$419
This American Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:51 pm
STL
-
ABE
1 stop4h 40m
American Airlines
Fri 3/1312:00 pm
ABE
-
STL
1 stop7h 07m
American Airlines
Deal found 1/26$421
This Delta deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:00 am
STL
-
ABE
1 stop5h 05m
Delta
Sat 2/285:58 pm
ABE
-
STL
1 stop6h 38m
Delta
Deal found 1/25$546
This American Airlines deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:17 am
STL
-
ABE
2 stops8h 23m
American Airlines
Mon 7/205:18 pm
ABE
-
STL
1 stop7h 24m
American Airlines
Deal found 1/25$758
This United Airlines deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/19:57 am
STL
-
ABE
1 stop5h 25m
United Airlines
Thu 2/511:30 am
ABE
-
STL
1 stop5h 33m
United Airlines
Deal found 1/25$779
This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2710:00 am
STL
-
ABE
1 stop5h 51m
United Airlines
Mon 3/305:38 pm
ABE
-
STL
1 stop5h 19m
United Airlines
Deal found 1/26$1,074

Find flight deals from St. Louis to Allentown

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Allentown (ABE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$349
(United Airlines)

Popular in

February

Cheapest in

March

Average price

$302
Provider with most accurate pricing for Lambert-St Louis-Allentown-Bethlehem flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Allentown-Bethlehem flights.
Search Deals
From Lambert-St Louis to Allentown-Bethlehem
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Allentown that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 26, 2026.
Use the filters below to find and compare flights from St. Louis to Allentown that are best for you.

Fly from

St. Louis

Fly to

Allentown

Route

Depart

Return

Price

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 2/10

9:57 am-4:22 pm

1 stop5h 25m

Allentown-Bethlehem

Sat 2/14

2:55 pm-9:05 pm

1 stop7h 10m

$349

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 7/15

3:42 pm-10:56 pm

1 stop6h 14m

Allentown-Bethlehem

Mon 7/20

6:30 am-12:53 pm

1 stop7h 23m

$376

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 2/18

9:55 am-10:01 am

1 stop23h 06m

Allentown-Bethlehem

Sat 2/21

2:55 pm-9:05 pm

1 stop7h 10m

$419

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 2/28

6:00 am-12:05 pm

1 stop5h 05m

Allentown-Bethlehem

Sat 2/28

5:58 pm-11:36 pm

1 stop6h 38m

$546

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 7/15

9:17 am-6:40 pm

2 stops8h 23m

Allentown-Bethlehem

Mon 7/20

5:18 pm-11:42 pm

1 stop7h 24m

$758

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 3/10

10:00 am-4:51 pm

1 stop5h 51m

Allentown-Bethlehem

Fri 3/13

10:31 am-7:13 pm

2 stops9h 42m

$1,014

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 3/27

10:00 am-4:51 pm

1 stop5h 51m

Allentown-Bethlehem

Mon 3/30

5:38 pm-9:57 pm

1 stop5h 19m

$1,074

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Compare providers for flights from St. Louis to Allentown

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Allentown in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Allentown flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Allentown flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Allentown flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Allentown flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Allentown flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Allentown

What is the cheapest month to book a flight from St. Louis to Allentown?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Allentown (average of $129). Flying from St. Louis to Allentown in June is currently the most expensive (average of $244). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Allentown

Get insights into the airlines that provide service to Allentown. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Allentown. Reviews last updated January 26, 2026.
Get a feel of what it's like to fly with Delta and American Airlines from St. Louis to Allentown by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,111 reviews

Crew

8.5

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,111 reviews
Delta
7.9
Good
8,111 reviews

Crew

8.5

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,189 reviews
Delta
7.9
Good
8,111 reviews

Crew

8.5

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Allentown. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Allentown?

    For as low as $349, United Airlines can have you in Allentown from St. Louis in 5h 25m. Airlines will cover a distance of 803 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from St. Louis to Allentown round-trip?

    Currently priced at $228, American Airlines will fly you from St. Louis to Allentown and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Delta for as low as $274. Users have found that American Airlines is 34% cheaper than the other options available to this destination.

  • Can I find deals for flights from St. Louis to Allentown that include hotel bookings?

    Yes. In addition to deals on St. Louis to Allentown flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Allentown?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Allentown.

  • Can I find deals for business class flights from St. Louis to Allentown?

    Yes. Cheapflights offers flight deals from St. Louis to Allentown by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Allentown?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Allentown (average of $129). Flying from St. Louis to Allentown in June is currently the most expensive (average of $244). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from St. Louis to Allentown

Discover the top 2 airlines that operate flights from St. Louis to Allentown. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$228Average$303FlexibilityNo cancel feeOn-time71%
DeltaCheapest$274Average$378FlexibilityNo cancel feeOn-timeN/A

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