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Allentown

$129+ Cheap flights from St. Louis to Allentown (STL - ABE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ABE
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$249
(Delta)

One-way from

$129
(American Airlines)

Popular in

February

Cheapest in

January

Average price

$330
From Lambert-St Louis to Allentown-Bethlehem
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One-way flight from Lambert-St Louis to Allentown-Bethlehem
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Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/10. 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 10/43:55 pmSTL - ABE
1 stop5h 27mDelta
Sat 10/116:00 pmABE - STL
1 stop5h 04mDelta
Deal found 9/10$249
This Delta deal was found by Cheapflights users on 9/9. 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 9/246:01 amSTL - ABE
1 stop5h 03mDelta
Sat 9/276:12 pmABE - STL
1 stop4h 48mDelta
Deal found 9/9$259
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 9/1112:47 pmSTL - ABE
1 stop5h 42mAmerican Airlines
Tue 9/167:00 pmABE - STL
1 stop5h 07mAmerican Airlines
Deal found 9/9$324
This Delta deal was found by Cheapflights users on 9/10. 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 9/273:55 pmSTL - ABE
1 stop5h 27mDelta
Mon 9/296:12 pmABE - STL
1 stop6h 12mDelta
Deal found 9/10$329
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 9/254:36 pmSTL - ABE
1 stop5h 13mAmerican Airlines
Sun 9/287:59 pmABE - STL
1 stop4h 54mAmerican Airlines
Deal found 9/11$354
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Thu 9/1112:47 pmSTL - ABE
1 stop5h 42mAmerican Airlines
Sun 9/147:59 pmABE - STL
1 stop4h 54mAmerican Airlines
Deal found 9/8$394
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/46:15 amSTL - ABE
2 stops14h 39mUnited Airlines
Sat 10/115:28 pmABE - STL
1 stop5h 09mUnited Airlines
Deal found 9/10$418
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/35:28 pmSTL - ABE
1 stop16h 10mUnited Airlines
Sun 10/56:30 amABE - STL
1 stop5h 19mUnited Airlines
Deal found 9/9$420
This Delta deal was found by Cheapflights users on 9/11. 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.
Sun 11/166:00 amSTL - ABE
1 stop5h 16mDelta
Tue 11/1812:56 pmABE - STL
1 stop6h 39mDelta
Deal found 9/11$422
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 12/47:12 amSTL - ABE
1 stop5h 18mAmerican Airlines
Mon 12/81:48 pmABE - STL
1 stop5h 55mAmerican Airlines
Deal found 9/10$424
This Delta deal was found by Cheapflights users on 9/11. 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.
Fri 11/73:59 pmSTL - ABE
1 stop5h 16mDelta
Sun 11/96:00 amABE - STL
1 stop5h 49mDelta
Deal found 9/11$439

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 September 11, 2025.
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 10/21

3:59 pm-10:15 pm

1 stop5h 16m

Allentown-Bethlehem

Sat 10/25

6:00 pm-10:04 pm

1 stop5h 04m

$249

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 10/4

3:55 pm-10:22 pm

1 stop5h 27m

Allentown-Bethlehem

Sat 10/11

6:00 pm-10:04 pm

1 stop5h 04m

$249

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 9/24

6:01 am-12:04 pm

1 stop5h 03m

Allentown-Bethlehem

Sat 9/27

6:12 pm-10:00 pm

1 stop4h 48m

$259

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 9/25

4:36 pm-10:49 pm

1 stop5h 13m

Allentown-Bethlehem

Sun 9/28

7:59 pm-11:53 pm

1 stop4h 54m

$354

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 10/4

6:15 am-9:54 pm

2 stops14h 39m

Allentown-Bethlehem

Sat 10/11

5:28 pm-9:37 pm

1 stop5h 09m

$418

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 10/3

5:28 pm-10:38 am

1 stop16h 10m

Allentown-Bethlehem

Sun 10/5

6:30 am-10:49 am

1 stop5h 19m

$420

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sun 11/16

6:00 am-12:16 pm

1 stop5h 16m

Allentown-Bethlehem

Tue 11/18

12:56 pm-6:35 pm

1 stop6h 39m

$422

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 12/4

7:12 am-1:30 pm

1 stop5h 18m

Allentown-Bethlehem

Mon 12/8

1:48 pm-6:43 pm

1 stop5h 55m

$424

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 11/7

3:59 pm-10:15 pm

1 stop5h 16m

Allentown-Bethlehem

Sun 11/9

6:00 am-10:49 am

1 stop5h 49m

$439

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 9/30

8:17 am-2:05 pm

1 stop4h 48m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 18 results
1
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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, February is the cheapest month in which you can book a flight from St. Louis to Allentown (average of $289). Flying from St. Louis to Allentown in December is currently the most expensive (average of $382). 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.

How much does it cost to fly round-trip from St. Louis to Allentown?

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 September 11, 2025.
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
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $354, Delta can have you in Allentown from St. Louis in 5h 13m. 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 $303. Users have found that American Airlines is 36% 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, February is the cheapest month in which you can book a flight from St. Louis to Allentown (average of $289). Flying from St. Louis to Allentown in December is currently the most expensive (average of $382). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$228Average$348FlexibilityNo cancel feeOn-time71%
DeltaCheapest$303Average$477FlexibilityNo cancel feeOn-timeN/A

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