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$239+ Cheap flights from Allentown to St. Louis (ABE - STL)

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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — STL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Allentown to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to St. Louis (STL). 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 16, 2025.

Round-trip from

$249
(American Airlines)

One-way from

$239
(Delta)

Popular in

November

Cheapest in

June

Average price

$280
From Allentown-Bethlehem to Lambert-St Louis
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One-way flight from Allentown-Bethlehem to Lambert-St Louis
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Highest demand for flights based on searches. 5% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($4 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 Allentown to St. Louis

Cheapest flights from Allentown to St. Louis
Explore the most affordable flight options available from Allentown to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 10/175:53 pmABE - STL
1 stop7h 05mAmerican Airlines
Sat 10/185:20 amSTL - ABE
1 stop7h 06mAmerican Airlines
Deal found 9/15$249
This Delta deal was found by Cheapflights users on 9/14. 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 9/276:12 pmABE - STL
1 stop4h 48mDelta
Tue 9/3011:04 amSTL - ABE
1 stop5h 27mDelta
Deal found 9/14$284
This Delta deal was found by Cheapflights users on 9/15. 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.
Thu 9/256:00 amABE - STL
1 stop4h 59mDelta
Sun 9/286:01 amSTL - ABE
1 stop5h 03mDelta
Deal found 9/15$339
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/301:00 pmABE - STL
1 stop7h 42mUnited Airlines
Sat 10/49:20 amSTL - ABE
1 stop6h 33mUnited Airlines
Deal found 9/15$369
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 10/115:53 pmABE - STL
1 stop7h 05mAmerican Airlines
Sun 10/125:30 amSTL - ABE
1 stop6h 56mAmerican Airlines
Deal found 9/16$394
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/16:30 amABE - STL
1 stop5h 19mUnited Airlines
Sun 10/55:00 amSTL - ABE
1 stop4h 38mUnited Airlines
Deal found 9/16$424
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/710:16 amABE - STL
2 stops23h 51mMultiple Airlines
Thu 10/96:05 pmSTL - ABE
1 stop28h 06mMultiple Airlines
Deal found 9/15$437
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/76:30 amABE - STL
1 stop5h 19mUnited Airlines
Thu 10/95:00 amSTL - ABE
1 stop4h 38mUnited Airlines
Deal found 9/15$477
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 10/105:53 pmABE - STL
1 stop7h 05mAmerican Airlines
Mon 10/135:30 amSTL - ABE
1 stop6h 56mAmerican Airlines
Deal found 9/14$494
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 11/256:00 amABE - STL
1 stop5h 49mDelta
Fri 11/286:00 amSTL - ABE
1 stop6h 30mDelta
Deal found 9/16$499
This Delta deal was found by Cheapflights users on 9/16. 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 12/1912:54 pmABE - STL
1 stop6h 40mDelta
Mon 12/225:17 pmSTL - ABE
1 stop4h 29mDelta
Deal found 9/16$649

Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown to St. Louis 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 16, 2025.
Use the filters below to find and compare flights from Allentown to St. Louis that are best for you.

Fly from

Allentown

Fly to

St. Louis

Route

Depart

Return

Price

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 11/1

6:00 pm-10:04 pm

1 stop5h 04m

Lambert-St Louis

Sat 11/8

3:59 pm-10:15 pm

1 stop5h 16m

$249

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 10/17

5:53 pm-11:58 pm

1 stop7h 05m

Lambert-St Louis

Sat 10/18

5:20 am-1:26 pm

1 stop7h 06m

$249

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 9/27

6:12 pm-10:00 pm

1 stop4h 48m

Lambert-St Louis

Tue 9/30

11:04 am-5:31 pm

1 stop5h 27m

$284

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 9/25

6:00 am-9:59 am

1 stop4h 59m

Lambert-St Louis

Sun 9/28

6:01 am-12:04 pm

1 stop5h 03m

$339

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 9/30

1:00 pm-7:42 pm

1 stop7h 42m

Lambert-St Louis

Sat 10/4

9:20 am-4:53 pm

1 stop6h 33m

$369

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 10/11

5:53 pm-11:58 pm

1 stop7h 05m

Lambert-St Louis

Sun 10/12

5:30 am-1:26 pm

1 stop6h 56m

$394

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Wed 10/1

6:30 am-10:49 am

1 stop5h 19m

Lambert-St Louis

Sun 10/5

5:00 am-10:38 am

1 stop4h 38m

$424

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 10/7

10:16 am-9:07 am

2 stops23h 51m

Lambert-St Louis

Thu 10/9

6:05 pm-11:11 pm

1 stop28h 06m

$437

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 10/7

6:30 am-10:49 am

1 stop5h 19m

Lambert-St Louis

Thu 10/9

5:00 am-10:38 am

1 stop4h 38m

$477

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 10/10

5:53 pm-11:58 pm

1 stop7h 05m

Lambert-St Louis

Mon 10/13

5:30 am-1:26 pm

1 stop6h 56m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 13 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Allentown 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 Allentown to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Allentown to St. Louis (average of $311). Flying from Allentown to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from ABE to STL?

Find hourly flight availability from Allentown to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Allentown to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 21% versus a flight in the morning.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated September 16, 2025.
Peruse reviews from past customers who have flown with Delta and American Airlines from Allentown to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

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
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

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
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

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 Allentown to St. Louis. 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 Allentown to St. Louis?

    Departing from Allentown to St. Louis will take you 5h 04m. Allentown and St. Louis are separated by a distance of 803 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Allentown to St. Louis round-trip from $228. Another airline that can offer you cheap pricing is Delta. Users have found that American Airlines is 28% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Allentown to St. Louis 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 Allentown to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Allentown to St. Louis (average of $311). Flying from Allentown to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Allentown to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Allentown to St. Louis

Discover the top 2 airlines that operate flights from Allentown to St. Louis. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$228Average$319FlexibilityNo cancel feeOn-time71%
DeltaCheapest$242Average$353FlexibilityNo cancel feeOn-timeN/A

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