HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$145+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — STL
Aug 9 — Aug 161
Sun 8/9
Sun 8/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Allentown to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 July 10, 2026.

This American Airlines deal was found by Cheapflights users on 7/9. 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.
Sat 11/146:00 am
ABE
-
STL
1 stop7h 35m
American Airlines
Mon 11/1611:31 am
STL
-
ABE
1 stop5h 16m
American Airlines
Deal found 7/9$289
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:09 pm
ABE
-
STL
1 stop6h 22m
Delta
Thu 8/203:39 pm
STL
-
ABE
1 stop5h 44m
Delta
Deal found 7/8$291
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:08 pm
ABE
-
STL
1 stop6h 50m
Delta
Sat 8/227:00 am
STL
-
ABE
1 stop4h 28m
Delta
Deal found 7/8$307
This Delta deal was found by Cheapflights users on 7/9. 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.
Thu 9/176:08 pm
ABE
-
STL
1 stop6h 34m
Delta
Fri 9/184:59 pm
STL
-
ABE
1 stop4h 27m
Delta
Deal found 7/9$331
This United Airlines deal was found by Cheapflights users on 7/9. 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 7/246:15 am
ABE
-
STL
1 stop6h 56m
United Airlines
Tue 7/289:20 am
STL
-
ABE
1 stop6h 41m
United Airlines
Deal found 7/9$339
This Delta deal was found by Cheapflights users on 7/7. 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 8/71:10 pm
ABE
-
STL
1 stop5h 43m
Delta
Sat 8/810:31 am
STL
-
ABE
1 stop5h 52m
Delta
Deal found 7/7$354
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:16 am
ABE
-
STL
1 stop4h 38m
Delta
Sun 8/97:00 am
STL
-
ABE
1 stop4h 28m
Delta
Deal found 7/8$370
This Delta deal was found by Cheapflights users on 7/7. 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 8/71:10 pm
ABE
-
STL
1 stop5h 43m
Delta
Mon 8/106:00 am
STL
-
ABE
1 stop5h 28m
Delta
Deal found 7/7$375
This Delta deal was found by Cheapflights users on 7/7. 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 7/226:05 pm
ABE
-
STL
1 stop6h 48m
Delta
Sun 7/263:58 pm
STL
-
ABE
1 stop6h 10m
Delta
Deal found 7/7$385

Find 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 July 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(American Airlines)

One-way from

$145
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$378
Provider with most accurate pricing for Allentown-Bethlehem-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Allentown-Bethlehem-Lambert-St Louis flights.
Search Deals
From Allentown-Bethlehem to Lambert-St Louis
Search Deals
One-way flight from Allentown-Bethlehem to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 10, 2026.
Use the filters below to find and compare flights from Allentown to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 8/15

6:09 pm-11:31 pm

1 stop6h 22m

Lambert-St Louis

Thu 8/20

3:39 pm-10:23 pm

1 stop5h 44m

$291

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 8/6

6:08 pm-11:58 pm

1 stop6h 50m

Lambert-St Louis

Sat 8/8

6:00 am-12:28 pm

1 stop5h 28m

$291
Quickest round-trip

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 8/14

6:16 am-9:54 am

1 stop4h 38m

Lambert-St Louis

Sat 8/22

6:00 am-12:28 pm

1 stop5h 28m

$307

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 8/6

6:08 pm-11:58 pm

1 stop6h 50m

Lambert-St Louis

Thu 8/13

11:00 am-5:23 pm

1 stop5h 23m

$323

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 7/24

6:15 am-12:11 pm

1 stop6h 56m

Lambert-St Louis

Tue 7/28

9:20 am-5:01 pm

1 stop6h 41m

$339

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 7/23

6:05 pm-10:15 pm

1 stop5h 10m

Lambert-St Louis

Sun 7/26

3:58 pm-11:08 pm

1 stop6h 10m

$385

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 7/30

6:30 am-12:17 pm

1 stop6h 47m

Lambert-St Louis

Sun 8/2

6:00 am-12:22 pm

1 stop5h 22m

$425

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 11/14

5:32 pm-9:13 pm

1 stop4h 41m

Lambert-St Louis

Wed 11/18

8:33 am-4:56 pm

1 stop7h 23m

$500
Cheapest one-way

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 10/8

6:30 am-1:20 pm

1 stop7h 50m

$146

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Mon 8/24

7:00 am-5:50 pm

2 stops35h 50m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Allentown to St. Louis

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 Allentown to St. Louis in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 Allentown-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Allentown-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Allentown-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub 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 Allentown-St. Louis 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 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, September is the cheapest month in which you can book a flight from Allentown to St. Louis (average of $298). Flying from Allentown to St. Louis in December is currently the most expensive (average of $622). 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 Allentown to St. Louis?

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 July 10, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican 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
7.8
Good
8,456 reviews

Entertainment

7.8

Food

7.2

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Jamie,Jul 2023

PIT - ATL

When I booked the ticket, I asked for a bulkhead seat for my son, with a broken leg. So he was unable to elevate his leg like he was specifically instructed to do. That was not what was booked at the time we bought the ticket. No headphones passed out for the entertainment. Food is a joke on airlines now, you may be lucky if you get a couple of almonds.
Delta
7.8
Good
8,456 reviews
Delta
7.8
Good
8,456 reviews

Entertainment

7.8

Food

7.2

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Jamie,Jul 2023

PIT - ATL

When I booked the ticket, I asked for a bulkhead seat for my son, with a broken leg. So he was unable to elevate his leg like he was specifically instructed to do. That was not what was booked at the time we bought the ticket. No headphones passed out for the entertainment. Food is a joke on airlines now, you may be lucky if you get a couple of almonds.
United Airlines
7.4
Good
9,966 reviews
Delta
7.8
Good
8,456 reviews

Entertainment

7.8

Food

7.2

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Jamie,Jul 2023

PIT - ATL

When I booked the ticket, I asked for a bulkhead seat for my son, with a broken leg. So he was unable to elevate his leg like he was specifically instructed to do. That was not what was booked at the time we bought the ticket. No headphones passed out for the entertainment. Food is a joke on airlines now, you may be lucky if you get a couple of almonds.
American Airlines
7.1
Good
11,799 reviews
Delta
7.8
Good
8,456 reviews

Entertainment

7.8

Food

7.2

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Jamie,Jul 2023

PIT - ATL

When I booked the ticket, I asked for a bulkhead seat for my son, with a broken leg. So he was unable to elevate his leg like he was specifically instructed to do. That was not what was booked at the time we bought the ticket. No headphones passed out for the entertainment. Food is a joke on airlines now, you may be lucky if you get a couple of almonds.

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 6h 22m. Allentown and St. Louis are separated by a distance of 803 mi.

  • 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. Other airlines that can offer you cheap pricing are Delta, from $282, and United Airlines, from $312. Users have found that American Airlines is 43% 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, September is the cheapest month in which you can book a flight from Allentown to St. Louis (average of $298). Flying from Allentown to St. Louis in December is currently the most expensive (average of $622). 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
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Allentown to St. Louis

Discover the top 3 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 July 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$228Average$374FlexibilityNo cancel feeOn-time71%
DeltaCheapest$282Average$386FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$312Average$426FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.