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 42% 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 United 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 February 2026.

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.

$315 Cheap Flights from St. Louis to Allentown in 2026

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Find the cheapest flights from St. Louis to Allentown

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:55 am - 4:48 pm

STL

ABE

5h 53m

1 stop

5:23 pm - 9:05 pm

ABE

STL

4h 42m

1 stop

$468United Airlines

Tue, Feb 24 - Sat, Feb 28

8:17 am - 4:48 pm

STL

ABE

7h 31m

1 stop

5:23 pm - 9:05 pm

ABE

STL

4h 42m

1 stop

$498United Airlines

Wed, Feb 18 - Sat, Feb 21

8:17 am - 4:48 pm

STL

ABE

7h 31m

1 stop

2:55 pm - 7:14 pm

ABE

STL

5h 19m

1 stop

$503United Airlines

Wed, Feb 18 - Sat, Feb 21

6:00 am - 12:05 pm

STL

ABE

5h 05m

1 stop

5:58 pm - 11:36 pm

ABE

STL

6h 38m

1 stop

$510Delta

Fri, Feb 27 - Tue, Mar 3

12:04 pm - 5:17 pm

STL

ABE

4h 13m

1 stop

5:58 pm - 11:58 pm

ABE

STL

7h 00m

1 stop

$514Delta

Thu, Mar 19 - Sat, Mar 21

9:55 am - 4:48 pm

STL

ABE

5h 53m

1 stop

2:55 pm - 9:05 pm

ABE

STL

7h 10m

1 stop

$548United Airlines

Wed, Feb 18 - Sat, Feb 21

9:59 am - 5:19 pm

STL

ABE

6h 20m

1 stop

5:59 pm - 11:34 pm

ABE

STL

6h 35m

1 stop

$577Delta

Thu, Apr 16 - Sun, Apr 19

6:00 pm - 4:48 pm

STL

ABE

21h 48m

2 stops

5:23 pm - 9:05 pm

ABE

STL

4h 42m

1 stop

$617United Airlines

Fri, Feb 27 - Tue, Mar 3

10:13 am - 5:12 pm

STL

ABE

5h 59m

1 stop

5:58 pm - 11:36 pm

ABE

STL

6h 38m

1 stop

$649Delta

Mon, Feb 16 - Sun, Feb 22

10:11 pm - 2:52 pm

STL

ABE

39h 41m

2 stops

2:14 pm - 11:59 pm

ABE

STL

10h 45m

1 stop

$740Multiple Airlines

Mon, Feb 16 - Thu, Feb 19

Delta flights from St. Louis to Allentown

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

Delta

Jul 15

STL3:42 pmLambert-St Louis

6h 14m

1 stop

ABE10:56 pmAllentown-Bethlehem

Jul 20

ABE6:30 amAllentown-Bethlehem

7h 24m

1 stop

STL12:54 pmLambert-St Louis

$390

Delta

Jul 15

STL3:42 pmLambert-St Louis

6h 14m

1 stop

ABE10:56 pmAllentown-Bethlehem

Jul 20

ABE6:30 amAllentown-Bethlehem

7h 24m

1 stop

STL12:54 pmLambert-St Louis

$400

Delta

Jul 15

STL3:42 pmLambert-St Louis

6h 14m

1 stop

ABE10:56 pmAllentown-Bethlehem

Jul 20

ABE6:30 amAllentown-Bethlehem

7h 24m

1 stop

STL12:54 pmLambert-St Louis

$414

United Airlines flights from St. Louis to Allentown

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

United Airlines

Feb 24

STL9:55 amLambert-St Louis

5h 53m

1 stop

ABE4:48 pmAllentown-Bethlehem

Feb 28

ABE5:23 pmAllentown-Bethlehem

4h 42m

1 stop

STL9:05 pmLambert-St Louis

$468

United Airlines

Feb 18

STL8:17 amLambert-St Louis

7h 31m

1 stop

ABE4:48 pmAllentown-Bethlehem

Feb 21

ABE5:23 pmAllentown-Bethlehem

4h 42m

1 stop

STL9:05 pmLambert-St Louis

$498

United Airlines

Feb 18

STL8:17 amLambert-St Louis

7h 31m

1 stop

ABE4:48 pmAllentown-Bethlehem

Feb 21

ABE2:55 pmAllentown-Bethlehem

5h 19m

1 stop

STL7:14 pmLambert-St Louis

$503

Fly from

Fly to

Route

Depart

Return

Price

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 2/24

9:55 am-4:48 pm

1 stop5h 53m

Allentown-Bethlehem

Sat 2/28

5:23 pm-9:05 pm

1 stop4h 42m

$468

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 2/18

8:17 am-4:48 pm

1 stop7h 31m

Allentown-Bethlehem

Sat 2/21

5:23 pm-9:05 pm

1 stop4h 42m

$498

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 2/18

8:17 am-4:48 pm

1 stop7h 31m

Allentown-Bethlehem

Sat 2/21

2:55 pm-7:14 pm

1 stop5h 19m

$503

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 2/27

6:00 am-12:05 pm

1 stop5h 05m

Allentown-Bethlehem

Tue 3/3

5:58 pm-11:36 pm

1 stop6h 38m

$510

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 3/19

12:04 pm-5:17 pm

1 stop4h 13m

Allentown-Bethlehem

Sat 3/21

5:58 pm-11:58 pm

1 stop7h 00m

$514

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 2/18

9:55 am-4:48 pm

1 stop5h 53m

Allentown-Bethlehem

Sat 2/21

2:55 pm-9:05 pm

1 stop7h 10m

$548

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 4/16

9:59 am-5:19 pm

1 stop6h 20m

Allentown-Bethlehem

Sun 4/19

5:59 pm-11:34 pm

1 stop6h 35m

$577

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 2/27

6:00 pm-4:48 pm

2 stops21h 48m

Allentown-Bethlehem

Tue 3/3

5:23 pm-9:05 pm

1 stop4h 42m

$617

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Mon 2/16

10:13 am-5:12 pm

1 stop5h 59m

Allentown-Bethlehem

Sun 2/22

5:58 pm-11:36 pm

1 stop6h 38m

$649

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Mon 2/16

10:11 pm-2:52 pm

2 stops39h 41m

Allentown-Bethlehem

Thu 2/19

2:14 pm-11:59 pm

1 stop10h 45m

$740

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 cheapest month to fly to Allentown?

The month of March is, on average, the cheapest month to fly to Allentown from St. Louis, with most prices found around $226. If you aren’t able to travel to Allentown during the month of March, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $268.

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 13m
Direct flights	None

The fastest flight from St. Louis to Allentown takes 4h 13m

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 13m 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 February 2026.
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 (74% of total bookings). The next most popular airline is Delta (26%).

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 11,271 reviews		Search American Airlines flights
Delta	PriceFrom $274	Free Cancellation	Rating 7.9 8,180 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.