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 $249. Another airline that can offer you cheap pricing is Delta. Users have found that American Airlines is 22% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Allentown to St. Louis one-way?

The cheapest airlines for a one-way flight from Allentown to St. Louis are Delta ($375), United Airlines ($768), and American Airlines ($811).

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.

How far in advance should I book a flight from Allentown to St. Louis?

Find a great deal and save up to 40% by booking at least 36 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Allentown to St. Louis within the next two weeks, with the cheapest ticket starting at $263.

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

Our data shows that September tends to be the cheapest month to fly to St. Louis from Allentown. Users have commonly found prices around $319 for the month, but tickets can be as low as $181. Due to multiple factors, prepare for potentially higher prices in December.

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.

$249+ Flights from Allentown to St. Louis

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Allentown-Bethlehem to Lambert-St Louis are usually found in September or July, booked 85 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from Allentown to St. Louis

Round-trip from	$249 (American Airlines)
Popular in	December
Cheapest in	September
Average price	$268

From Allentown-Bethlehem to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($56 potential increase over avg. RT price).

Search Deals

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

Search Deals

Average for round-trip flights in July 2025

Search Deals

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 July 2, 2025.

Thu 8/141:56 pmABE - STL

1 stop6h 27mAmerican Airlines

Mon 8/186:26 amSTL - ABE

1 stop7h 00mAmerican Airlines

Deal found 6/30

$249

Fri 7/186:14 pmABE - STL

1 stop6h 39mDelta

Mon 7/213:41 pmSTL - ABE

1 stop5h 49mDelta

Deal found 6/30

$254

Thu 8/144:03 pmABE - STL

2 stops22h 29mMultiple Airlines

Mon 8/182:30 pmSTL - ABE

2 stops7h 23mMultiple Airlines

Deal found 6/30

$316

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 July 2, 2025.

Thu 8/141:56 pmABE - STL

1 stop6h 27mAmerican Airlines

Mon 8/186:26 amSTL - ABE

1 stop7h 00mAmerican Airlines

Deal found 6/30

$249

Fri 7/186:14 pmABE - STL

1 stop6h 39mDelta

Tue 7/223:41 pmSTL - ABE

1 stop5h 49mDelta

Deal found 6/30

$254

Thu 8/144:03 pmABE - STL

2 stops22h 29mMultiple Airlines

Mon 8/182:30 pmSTL - ABE

2 stops7h 23mMultiple Airlines

Deal found 6/30

$316

Last-minute flights from Allentown to St. Louis
Discover last-minute flight deals from Allentown to St. Louis. Data last updated July 2, 2025 and is based on user searches.

Tue 7/86:00 amABE - STL

1 stop4h 41mDelta

Mon 7/143:41 pmSTL - ABE

1 stop5h 49mDelta

Deal found 6/30

$404

Tue 7/85:35 pmABE - STL

1 stop6h 10mUnited Airlines

Mon 7/144:45 pmSTL - ABE

2 stops23h 15mUnited Airlines

Deal found 6/30

$767

Fri 7/118:03 pmABE - STL

1 stop4h 56mAmerican Airlines

Sun 7/134:28 pmSTL - ABE

1 stop6h 59mAmerican Airlines

Deal found 7/1

$559

Sat 7/1212:46 pmABE - STL

2 stops22h 06mMultiple Airlines

Fri 7/1810:47 amSTL - ABE

2 stops22h 15mMultiple Airlines

Deal found 6/30

$467

Fri 7/186:14 pmABE - STL

1 stop6h 39mDelta

Mon 7/213:41 pmSTL - ABE

1 stop5h 49mDelta

Deal found 6/30

$254

Thu 8/141:56 pmABE - STL

1 stop6h 27mAmerican Airlines

Mon 8/186:26 amSTL - ABE

1 stop7h 00mAmerican Airlines

Deal found 6/30

$249

Thu 8/144:03 pmABE - STL

2 stops22h 29mMultiple Airlines

Mon 8/182:30 pmSTL - ABE

2 stops7h 23mMultiple Airlines

Deal found 6/30

$316

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 July 2, 2025.

Sun 7/134:11 pmABE - STL

1 stop8h 36mMultiple Airlines

Deal found 7/1

$267

Mon 7/76:14 pmABE - STL

1 stop6h 39mDelta

Deal found 6/30

$375

Mon 7/75:35 pmABE - STL

2 stops20h 11mUnited Airlines

Deal found 6/30

$768

Fri 7/116:15 amABE - STL

2 stops8h 35mAmerican Airlines

Deal found 7/1

$811

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

Thu 8/14

1:56 pm-7:23 pm

1 stop6h 27m

Lambert-St Louis

Mon 8/18

6:26 am-2:26 pm

1 stop7h 00m

$249

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 7/18

6:14 pm-11:53 pm

1 stop6h 39m

Lambert-St Louis

Tue 7/22

3:41 pm-10:30 pm

1 stop5h 49m

$254

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 8/14

4:03 pm-1:32 pm

2 stops22h 29m

Lambert-St Louis

Mon 8/18

2:30 pm-10:53 pm

2 stops7h 23m

$316

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sun 7/13

4:11 pm-11:47 pm

1 stop8h 36m

$267

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Mon 7/7

6:14 pm-11:53 pm

1 stop6h 39m

$375

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Mon 7/7

5:35 pm-12:46 pm

2 stops20h 11m

$768

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 7/11

6:15 am-1:50 pm

2 stops8h 35m

$811

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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

How far ahead should I book a flight from Allentown to St. Louis?

To ensure you get the cheapest price possible for a flight from Allentown to St. Louis, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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.

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

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

7,983 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

7,983 reviews

Delta

8.0

Very good

7,983 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

8,861 reviews

Delta

8.0

Very good

7,983 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

7,983 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 $249. Another airline that can offer you cheap pricing is Delta. Users have found that American Airlines is 22% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Allentown to St. Louis one-way?
The cheapest airlines for a one-way flight from Allentown to St. Louis are Delta ($375), United Airlines ($768), and American Airlines ($811).
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

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Top 3 airlines flying from Allentown to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$228	Average$306	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$236	Average$577	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$242	Average$353	FlexibilityNo cancel fee	On-timeN/A

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$249+ Cheap flights from Allentown to St. Louis (ABE - STL)

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 8/14. 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Allentown-Bethlehem to Lambert-St Louis are usually found in September or July, booked 85 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from Allentown to St. Louis

Round-trip from

Popular in

Cheapest in

Average price

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 July 2, 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 July 2, 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

How far ahead should I book a flight from Allentown to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Allentown to St. Louis. Price data was last updated on June 27, 2025.

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 July 2, 2025.

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

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?

What are the cheapest airlines to fly from Allentown to St. Louis one-way?

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?

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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 July 2, 2025.