What airlines fly to Allentown?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Allentown from St. Louis according to our data. United Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Allentown. Keep in mind that there are 6 different airlines that fly to Allentown on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Lambert-St Louis to Allentown-Bethlehem?

Delta and American Airlines are the most popular carriers operating from Lambert-St Louis to Allentown-Bethlehem

When did momondo last update prices for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport?

Prices for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport refresh daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport?

There are 2 operators available for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport as of December 2025.

How old do you have to be to fly from Lambert-St Louis Airport to Allentown-Bethlehem Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Allentown-Bethlehem Airport.

What documentation or ID do you need to fly to Allentown-Bethlehem Airport?

The required travel and health documents for your Allentown-Bethlehem Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Allentown-Bethlehem Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$23 Cheap Flights from St. Louis to Allentown in 2025/26

Q: What is the typical price of a round-trip flight between St. Louis and Allentown?

Prices are currently low for flights on this route. Typical prices usually range from $326 to $417. The lowest price recently found on this route was $315.

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Find the cheapest flights from St. Louis to New York

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One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:49 pm - 11:48 am

STL

ABE

18h 59m1 stop

8:30 am - 11:19 pm

ABE

STL

15h 49m1 stop

$315Multiple Airlines

Wed, Mar 4 - Fri, Mar 6

6:04 am - 12:06 pm

STL

ABE

5h 02m1 stop

5:59 pm - 11:58 pm

ABE

STL

6h 59m1 stop

$355Delta

Wed, Mar 11 - Sat, Mar 14

9:57 am - 4:22 pm

STL

ABE

5h 25m1 stop

6:15 am - 11:02 am

ABE

STL

5h 47m1 stop

$389United Airlines

Wed, Jan 28 - Sat, Jan 31

12:04 pm - 5:17 pm

STL

ABE

4h 13m1 stop

5:59 pm - 11:58 pm

ABE

STL

6h 59m1 stop

$401Delta

Wed, Apr 1 - Mon, Apr 6

9:59 am - 5:14 pm

STL

ABE

6h 15m1 stop

6:28 am - 11:04 am

ABE

STL

5h 36m1 stop

$433Delta

Sun, Feb 1 - Thu, Feb 5

3:49 pm - 11:48 am

STL

ABE

18h 59m1 stop

1:55 pm - 7:07 am

ABE

STL

18h 12m2 stops

$455Multiple Airlines

Wed, Mar 4 - Fri, Mar 6

3:30 pm - 2:56 pm

STL

ABE

22h 26m1 stop

6:28 pm - 9:47 am

ABE

STL

16h 19m2 stops

$474Multiple Airlines

Wed, Apr 1 - Mon, Apr 6

6:00 pm - 4:22 pm

STL

ABE

21h 22m2 stops

11:30 am - 4:03 pm

ABE

STL

5h 33m1 stop

$492United Airlines

Wed, Jan 28 - Sat, Jan 31

6:04 am - 12:06 pm

STL

ABE

5h 02m1 stop

6:32 am - 11:09 am

ABE

STL

5h 37m1 stop

$503Delta

Wed, Mar 11 - Sun, Mar 15

6:00 pm - 4:22 pm

STL

ABE

21h 22m2 stops

11:30 am - 4:03 pm

ABE

STL

5h 33m1 stop

$515United Airlines

Wed, Jan 28 - Sat, Jan 31

Delta flights from St. Louis to Allentown

Our best Delta deals on St. Louis to Allentown flight tickets

Delta

Dec 31

STL5:13 pmLambert-St Louis

4h 33m

1 stop

ABE10:46 pmAllentown-Bethlehem

Jan 7

ABE5:59 pmAllentown-Bethlehem

6h 40m

1 stop

STL11:39 pmLambert-St Louis

$316

Find similar

Delta

Jan 2

STL6:00 amLambert-St Louis

5h 09m

1 stop

ABE12:09 pmAllentown-Bethlehem

Jan 7

ABE5:59 pmAllentown-Bethlehem

6h 40m

1 stop

STL11:39 pmLambert-St Louis

$350

Find similar

Delta

Mar 11

STL6:04 amLambert-St Louis

5h 02m

1 stop

ABE12:06 pmAllentown-Bethlehem

Mar 14

ABE5:59 pmAllentown-Bethlehem

6h 59m

1 stop

STL11:58 pmLambert-St Louis

$355

Find similar

United Airlines flights from St. Louis to Allentown

Our best United Airlines deals on St. Louis to Allentown flight tickets

United Airlines

Jan 28

STL9:57 amLambert-St Louis

5h 25m

1 stop

ABE4:22 pmAllentown-Bethlehem

Jan 31

ABE6:15 amAllentown-Bethlehem

5h 47m

1 stop

STL11:02 amLambert-St Louis

$389

Find similar

United Airlines

Dec 29

STL8:05 amLambert-St Louis

4h 50m

1 stop

ABE1:55 pmAllentown-Bethlehem

Jan 7

ABE4:57 pmAllentown-Bethlehem

7h 01m

1 stop

STL10:58 pmLambert-St Louis

$394

Find similar

United Airlines

Dec 26

STL3:10 pmLambert-St Louis

5h 37m

1 stop

ABE9:47 pmAllentown-Bethlehem

Dec 27

ABE5:07 pmAllentown-Bethlehem

6h 36m

1 stop

STL10:43 pmLambert-St Louis

$439

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 3/4

3:49 pm-11:48 am

1 stop18h 59m

Allentown-Bethlehem

Fri 3/6

8:30 am-11:19 pm

1 stop15h 49m

$315

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 3/11

6:04 am-12:06 pm

1 stop5h 02m

Allentown-Bethlehem

Sat 3/14

5:59 pm-11:58 pm

1 stop6h 59m

$355

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 1/28

9:57 am-4:22 pm

1 stop5h 25m

Allentown-Bethlehem

Sat 1/31

6:15 am-11:02 am

1 stop5h 47m

$389

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 4/1

12:04 pm-5:17 pm

1 stop4h 13m

Allentown-Bethlehem

Mon 4/6

5:59 pm-11:58 pm

1 stop6h 59m

$401

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sun 2/1

9:59 am-5:14 pm

1 stop6h 15m

Allentown-Bethlehem

Thu 2/5

6:28 am-11:04 am

1 stop5h 36m

$433

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 3/4

3:49 pm-11:48 am

1 stop18h 59m

Allentown-Bethlehem

Fri 3/6

1:55 pm-7:07 am

2 stops18h 12m

$455

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 4/1

3:30 pm-2:56 pm

1 stop22h 26m

Allentown-Bethlehem

Mon 4/6

6:28 pm-9:47 am

2 stops16h 19m

$474

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 1/28

6:00 pm-4:22 pm

2 stops21h 22m

Allentown-Bethlehem

Sat 1/31

11:30 am-4:03 pm

1 stop5h 33m

$492

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 3/11

6:04 am-12:06 pm

1 stop5h 02m

Allentown-Bethlehem

Sun 3/15

6:32 am-11:09 am

1 stop5h 37m

$503

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 1/28

6:00 pm-4:22 pm

2 stops21h 22m

Allentown-Bethlehem

Sat 1/31

11:30 am-4:03 pm

1 stop5h 33m

$515

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Allentown

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between St. Louis and Allentown?

What is the cheapest month to fly to Allentown?

The month of September is, on average, the cheapest month to fly to Allentown from St. Louis, with most prices found around $268. If you aren’t able to travel to Allentown during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $303.

What is the cheapest day to depart on your flight to Allentown?

The cheapest day to depart from St. Louis to Allentown is on a Saturday when prices can be found for as low as $259. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Allentown on Monday is $522.

What is the cheapest time of day to depart on your flight to Allentown?

At noon is the cheapest time of day to fly from St. Louis to Allentown when you can find flight prices for as low as $233. Flying to Allentown at noon is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $348.

When to book flights from St. Louis to Allentown

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Allentown according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Allentown (STL to ABE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Allentown

Fastest flight time	4h 33m
Direct flights	None

The fastest flight from St. Louis to Allentown takes 4h 33m

There are no direct flights from St. Louis to Allentown. There are no popular flight routes from St. Louis to Allentown.

Search flight deals

How far is Lambert-St Louis to Allentown-Bethlehem by plane?
The distance between Lambert-St Louis and Allentown-Bethlehem is about 794.2 mi. Typically, this will take 4h 33m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport?
Prices for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport?
There are 2 operators available for flights from Lambert-St Louis Airport to Allentown-Bethlehem Airport as of December 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Allentown-Bethlehem Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Allentown-Bethlehem Airport.
What documentation or ID do you need to fly to Allentown-Bethlehem Airport?
The required travel and health documents for your Allentown-Bethlehem Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Allentown-Bethlehem Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from St. Louis to Allentown?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Allentown is American Airlines (76% of total bookings). The next most popular airline is Delta (24%).

Best airlines flying from St. Louis to Allentown

Compare and see reviews for airlines that fly from St. Louis to Allentown with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $228	Free Cancellation	Rating 7.2 11,062 reviews		Search American Airlines flights
Delta	PriceFrom $303	Free Cancellation	Rating 7.9 8,013 reviews		Search Delta flights

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Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Allentown?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Allentown. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Allentown with flexible booking policies on momondo?

Yes. All flights to Allentown from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Allentown?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Allentown.

I’m not ready to book a flight from St. Louis to Allentown right now. Can momondo alert me if prices change?

Price alerts on flights to Allentown from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.