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 United Airlines, from $236, and Delta, from $242. Users have found that American Airlines is 30% cheaper than the other options available to this destination.

What is the cheapest day to fly from Allentown to St. Louis?

Travelers seeking maximum savings on their Allentown to St. Louis flight should consider departing on Saturday mornings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the most popular airlines that fly from Allentown to St. Louis?

When booking a flight from Allentown to St. Louis, you may want to consider flying on American Airlines, Delta or United Airlines as they are the most popular for this route.

What is the cheapest day to fly round-trip from Allentown to St. Louis?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 86% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from Allentown to St. Louis?

Our data shows that June tends to be the cheapest month to fly to St. Louis from Allentown. Users have commonly found prices around $330 for the month, but tickets can be as low as $233. Due to multiple factors, prepare for potentially higher prices in August.

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.

$180+ Flights from Allentown to St. Louis

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Cheap flight deals from Allentown to St. Louis

Round-trip from	$249 (Delta)
One-way from	$180 (Kiwi.com)
Popular in	August
Cheapest in	June
Average price	$403

From Allentown-Bethlehem to Lambert-St Louis

Search Deals

One-way flight from Allentown-Bethlehem to Lambert-St Louis

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High demand for flights, 0% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in August 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 August 16, 2025.

Sat 11/812:46 pmABE - STL

1 stop6h 16mDelta

Sat 11/154:55 pmSTL - ABE

1 stop4h 57mDelta

Deal found 8/14

$249

Thu 8/286:15 amABE - STL

1 stop6h 56mAmerican Airlines

Sun 8/315:27 amSTL - ABE

1 stop6h 59mAmerican Airlines

Deal found 8/14

$259

Sat 11/82:00 pmABE - STL

2 stops10h 56mAmerican Airlines

Sat 11/158:54 amSTL - ABE

1 stop6h 45mAmerican Airlines

Deal found 8/14

$274

Sat 8/301:00 pmABE - STL

1 stop5h 52mUnited Airlines

Wed 9/36:35 amSTL - ABE

1 stop4h 23mUnited Airlines

Deal found 8/15

$299

Fri 9/267:00 pmABE - STL

1 stop5h 07mAmerican Airlines

Mon 9/296:29 amSTL - ABE

1 stop6h 36mAmerican Airlines

Deal found 8/14

$318

Thu 8/286:15 amABE - STL

1 stop6h 56mAmerican Airlines

Mon 9/15:27 amSTL - ABE

1 stop6h 47mAmerican Airlines

Deal found 8/13

$329

Sun 8/247:00 amABE - STL

2 stops30h 56mMultiple Airlines

Thu 8/282:02 pmSTL - ABE

1 stop7h 04mMultiple Airlines

Deal found 8/14

$336

Mon 8/256:00 amABE - STL

2 stops28h 11mMultiple Airlines

Thu 8/282:02 pmSTL - ABE

1 stop7h 04mMultiple Airlines

Deal found 8/14

$355

Fri 10/106:15 amABE - STL

1 stop11h 55mMultiple Airlines

Mon 10/139:06 pmSTL - ABE

1 stop11h 20mMultiple Airlines

Deal found 8/13

$357

Thu 8/284:03 pmABE - STL

2 stops22h 29mMultiple Airlines

Sun 8/3110:37 amSTL - ABE

1 stop7h 23mMultiple Airlines

Deal found 8/14

$365

Best flights from Allentown to St. Louis
Discover carefully curated flight deals from Allentown to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 16, 2025.

Sat 11/812:46 pmABE - STL

1 stop6h 16mDelta

Sat 11/154:55 pmSTL - ABE

1 stop4h 57mDelta

Deal found 8/14

$249

Thu 8/286:15 amABE - STL

1 stop6h 56mAmerican Airlines

Sun 8/315:27 amSTL - ABE

1 stop6h 59mAmerican Airlines

Deal found 8/14

$259

Sat 8/301:00 pmABE - STL

1 stop5h 52mUnited Airlines

Wed 9/36:35 amSTL - ABE

1 stop4h 23mUnited Airlines

Deal found 8/15

$299

Sun 8/247:00 amABE - STL

2 stops30h 56mMultiple Airlines

Thu 8/282:02 pmSTL - ABE

1 stop7h 04mMultiple Airlines

Deal found 8/14

$336

Fri 8/298:07 pmABE - STL

1 stop4h 40mAmerican Airlines

Tue 9/210:16 amSTL - ABE

1 stop6h 44mAmerican Airlines

Deal found 8/14

$259

Sat 11/82:00 pmABE - STL

2 stops10h 56mAmerican Airlines

Sat 11/158:54 amSTL - ABE

1 stop6h 45mAmerican Airlines

Deal found 8/14

$274

Mon 8/256:00 amABE - STL

2 stops28h 11mMultiple Airlines

Thu 8/282:02 pmSTL - ABE

1 stop7h 04mMultiple Airlines

Deal found 8/14

$355

Fri 9/267:00 pmABE - STL

1 stop5h 07mAmerican Airlines

Mon 9/296:29 amSTL - ABE

1 stop6h 36mAmerican Airlines

Deal found 8/14

$318

Fri 10/106:15 amABE - STL

1 stop11h 55mMultiple Airlines

Mon 10/139:06 pmSTL - ABE

1 stop11h 20mMultiple Airlines

Deal found 8/13

$357

Fri 8/298:07 pmABE - STL

1 stop4h 40mAmerican Airlines

Mon 9/15:27 amSTL - ABE

1 stop6h 47mAmerican Airlines

Deal found 8/14

$329

Thu 8/284:03 pmABE - STL

2 stops22h 29mMultiple Airlines

Sun 8/3110:37 amSTL - ABE

1 stop7h 23mMultiple Airlines

Deal found 8/14

$365

Thu 8/286:15 amABE - STL

1 stop6h 56mAmerican Airlines

Mon 9/15:27 amSTL - ABE

1 stop6h 47mAmerican Airlines

Deal found 8/13

$329

Last-minute flights from Allentown to St. Louis
Discover last-minute flight deals from Allentown to St. Louis. Data last updated August 16, 2025 and is based on user searches.

Sat 8/168:07 pmABE - STL

1 stop4h 48mAmerican Airlines

Sat 8/231:01 pmSTL - ABE

1 stop5h 04mAmerican Airlines

Deal found 8/15

$419

Sun 8/247:00 amABE - STL

2 stops30h 56mMultiple Airlines

Thu 8/282:02 pmSTL - ABE

1 stop7h 04mMultiple Airlines

Deal found 8/14

$336

Sun 8/244:03 pmABE - STL

2 stops21h 53mMultiple Airlines

Wed 8/277:54 pmSTL - ABE

1 stop18h 19mMultiple Airlines

Deal found 8/14

$417

Sun 8/241:00 pmABE - STL

1 stop5h 52mUnited Airlines

Wed 8/279:17 amSTL - ABE

1 stop6h 36mUnited Airlines

Deal found 8/14

$749

Sun 8/241:00 pmABE - STL

1 stop5h 52mUnited Airlines

Thu 8/285:15 amSTL - ABE

2 stops10h 38mUnited Airlines

Deal found 8/14

$923

Mon 8/256:00 amABE - STL

2 stops28h 11mMultiple Airlines

Thu 8/282:02 pmSTL - ABE

1 stop7h 04mMultiple Airlines

Deal found 8/14

$355

Mon 8/2512:35 pmABE - STL

2 stops21h 36mMultiple Airlines

Wed 8/277:54 pmSTL - ABE

1 stop18h 19mMultiple Airlines

Deal found 8/14

$454

Mon 8/256:00 amABE - STL

1 stop7h 31mDelta

Thu 8/286:00 amSTL - ABE

1 stop5h 16mDelta

Deal found 8/14

$680

Thu 8/286:15 amABE - STL

1 stop6h 56mAmerican Airlines

Sun 8/315:27 amSTL - ABE

1 stop6h 59mAmerican Airlines

Deal found 8/14

$259

Thu 8/286:15 amABE - STL

1 stop6h 56mAmerican Airlines

Mon 9/15:27 amSTL - ABE

1 stop6h 47mAmerican Airlines

Deal found 8/13

$329

Thu 8/284:03 pmABE - STL

2 stops22h 29mMultiple Airlines

Sun 8/3110:37 amSTL - ABE

1 stop7h 23mMultiple Airlines

Deal found 8/14

$365

Sat 8/301:00 pmABE - STL

1 stop5h 52mUnited Airlines

Wed 9/36:35 amSTL - ABE

1 stop4h 23mUnited Airlines

Deal found 8/15

$299

One-way flights from Allentown to St. Louis
Search for one-way flight options from Allentown to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 16, 2025.

Thu 8/214:03 pmABE - STL

2 stops21h 53mMultiple Airlines

Deal found 8/15

$180

Cheapflights Fare Finder

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

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 11/8

12:46 pm-6:02 pm

1 stop6h 16m

Lambert-St Louis

Sat 11/15

4:55 pm-10:52 pm

1 stop4h 57m

$249

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 8/28

6:15 am-12:11 pm

1 stop6h 56m

Lambert-St Louis

Sun 8/31

5:27 am-1:26 pm

1 stop6h 59m

$259

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 8/29

8:07 pm-11:47 pm

1 stop4h 40m

Lambert-St Louis

Tue 9/2

10:16 am-6:00 pm

1 stop6h 44m

$259

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 11/8

2:00 pm-11:56 pm

2 stops10h 56m

Lambert-St Louis

Sat 11/15

8:54 am-4:39 pm

1 stop6h 45m

$274

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 8/30

1:00 pm-5:52 pm

1 stop5h 52m

Lambert-St Louis

Wed 9/3

6:35 am-11:58 am

1 stop4h 23m

$299

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 9/26

7:00 pm-11:07 pm

1 stop5h 07m

Lambert-St Louis

Mon 9/29

6:29 am-2:05 pm

1 stop6h 36m

$318

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 8/29

8:07 pm-11:47 pm

1 stop4h 40m

Lambert-St Louis

Mon 9/1

5:27 am-1:14 pm

1 stop6h 47m

$329

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 8/28

6:15 am-12:11 pm

1 stop6h 56m

Lambert-St Louis

Mon 9/1

5:27 am-1:14 pm

1 stop6h 47m

$329

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sun 8/24

7:00 am-12:56 pm

2 stops30h 56m

Lambert-St Louis

Thu 8/28

2:02 pm-10:06 pm

1 stop7h 04m

$336

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Mon 8/25

6:00 am-9:11 am

2 stops28h 11m

Lambert-St Louis

Thu 8/28

2:02 pm-10:06 pm

1 stop7h 04m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 13 results

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?

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

Peruse reviews from past customers who have flown with Delta, United Airlines, 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

7,985 reviews

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

7,985 reviews

Delta

8.0

Very good

7,985 reviews

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!

United Airlines

7.4

Good

8,916 reviews

Delta

8.0

Very good

7,985 reviews

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

7,985 reviews

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

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 United Airlines, from $236, and Delta, from $242. Users have found that American Airlines is 30% 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

O'Fallon

Fairview Heights

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Eureka

St. Peters

Glencoe

Alton

Chesterfield

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Top 3 airlines flying from Allentown to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$228	Average$319	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$236	Average$577	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$242	Average$350	FlexibilityNo cancel fee	On-timeN/A

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$180+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Allentown to St. Louis with Cheapflights

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Cheap flight deals from Allentown to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

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Find flight deals from Allentown to St. Louis

Cheapest flights from Allentown to St. LouisExplore 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 August 16, 2025.

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 August 16, 2025.

Cheapflights Fare Finder

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

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.

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?

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 August 16, 2025.

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Delta, United Airlines, 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.

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.

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

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

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

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

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

Traveling to a place near St. Louis?

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Alternative routes for Allentown to St. Louis

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Top 3 airlines flying from Allentown to St. Louis

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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 August 16, 2025.