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 46% of people opting to fly with this airline when traveling to Allentown. Keep in mind that there are 5 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, American Airlines, 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 July 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.

$154 Cheap Flights from St. Louis to Allentown in 2026

Discover deals from 900+ travel sites with momondo.

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.

9:00 am - 5:12 pm

STL

ABE

7h 12m

1 stop

6:30 am - 10:48 am

ABE

STL

5h 18m

1 stop

$317Delta

Mon, Nov 23 - Thu, Nov 26

3:39 pm - 10:23 pm

STL

ABE

5h 44m

1 stop

6:16 am - 11:56 am

ABE

STL

6h 40m

1 stop

$330Delta

Thu, Sep 3 - Sun, Sep 6

7:00 am - 12:28 pm

STL

ABE

4h 28m

1 stop

6:08 pm - 11:58 pm

ABE

STL

6h 50m

1 stop

$333Delta

Sat, Aug 15 - Mon, Aug 17

7:00 am - 12:28 pm

STL

ABE

4h 28m

1 stop

6:08 pm - 11:58 pm

ABE

STL

6h 50m

1 stop

$343Delta

Sat, Aug 15 - Mon, Aug 17

6:00 am - 12:28 pm

STL

ABE

5h 28m

1 stop

6:08 pm - 11:58 pm

ABE

STL

6h 50m

1 stop

$349Delta

Sat, Aug 15 - Mon, Aug 17

10:35 am - 10:28 pm

STL

ABE

10h 53m

2 stops

6:00 am - 7:39 pm

ABE

STL

14h 39m

1 stop

$369Multiple Airlines

Fri, Oct 16 - Sun, Oct 18

3:39 pm - 10:23 pm

STL

ABE

5h 44m

1 stop

6:04 pm - 10:23 am

ABE

STL

17h 19m

2 stops

$379Delta

Mon, Aug 17 - Mon, Aug 24

9:00 am - 5:12 pm

STL

ABE

7h 12m

1 stop

6:30 am - 11:18 pm

ABE

STL

17h 48m

2 stops

$381Delta

Mon, Nov 23 - Thu, Nov 26

4:40 pm - 10:46 pm

STL

ABE

5h 06m

1 stop

6:30 am - 11:18 pm

ABE

STL

17h 48m

2 stops

$394Delta

Sat, Nov 21 - Thu, Nov 26

1:25 pm - 9:05 pm

STL

ABE

6h 40m

1 stop

5:32 pm - 9:13 pm

ABE

STL

4h 41m

1 stop

$399United Airlines

Sat, Oct 24 - Tue, Oct 27

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Delta flights from St. Louis to Allentown

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

Delta

Nov 23

STL9:00 amLambert-St Louis

7h 12m

1 stop

ABE5:12 pmAllentown-Bethlehem

Nov 26

ABE6:30 amAllentown-Bethlehem

5h 18m

1 stop

STL10:48 amLambert-St Louis

$317

Delta

Sep 3

STL3:39 pmLambert-St Louis

5h 44m

1 stop

ABE10:23 pmAllentown-Bethlehem

Sep 6

ABE6:16 amAllentown-Bethlehem

6h 40m

1 stop

STL11:56 amLambert-St Louis

$330

Delta

Aug 15

STL7:00 amLambert-St Louis

4h 28m

1 stop

ABE12:28 pmAllentown-Bethlehem

Aug 17

ABE6:08 pmAllentown-Bethlehem

6h 50m

1 stop

STL11:58 pmLambert-St Louis

$333

United Airlines flights from St. Louis to Allentown

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

United Airlines

Oct 24

STL1:25 pmLambert-St Louis

6h 40m

1 stop

ABE9:05 pmAllentown-Bethlehem

Oct 27

ABE5:32 pmAllentown-Bethlehem

4h 41m

1 stop

STL9:13 pmLambert-St Louis

$399

United Airlines

Jul 29

STL1:13 pmLambert-St Louis

6h 54m

1 stop

ABE9:07 pmAllentown-Bethlehem

Aug 2

ABE6:15 amAllentown-Bethlehem

5h 19m

1 stop

STL10:34 amLambert-St Louis

$424

United Airlines

Oct 24

STL6:00 amLambert-St Louis

14h 05m

1 stop

ABE9:05 pmAllentown-Bethlehem

Oct 27

ABE5:32 pmAllentown-Bethlehem

5h 08m

1 stop

STL9:40 pmLambert-St Louis

$446

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Mon 11/23

9:00 am-5:12 pm

1 stop7h 12m

Allentown-Bethlehem

Thu 11/26

6:30 am-10:48 am

1 stop5h 18m

$317

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 9/3

3:39 pm-10:23 pm

1 stop5h 44m

Allentown-Bethlehem

Sun 9/6

6:16 am-11:56 am

1 stop6h 40m

$330

Quickest round-trip

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 8/15

7:00 am-12:28 pm

1 stop4h 28m

Allentown-Bethlehem

Mon 8/17

6:08 pm-11:58 pm

1 stop6h 50m

$333

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 8/15

7:00 am-12:28 pm

1 stop4h 28m

Allentown-Bethlehem

Mon 8/17

6:08 pm-11:58 pm

1 stop6h 50m

$343

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 8/15

6:00 am-12:28 pm

1 stop5h 28m

Allentown-Bethlehem

Mon 8/17

6:08 pm-11:58 pm

1 stop6h 50m

$349

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 10/16

10:35 am-10:28 pm

2 stops10h 53m

Allentown-Bethlehem

Sun 10/18

6:00 am-7:39 pm

1 stop14h 39m

$369

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Mon 8/17

3:39 pm-10:23 pm

1 stop5h 44m

Allentown-Bethlehem

Mon 8/24

6:04 pm-10:23 am

2 stops17h 19m

$379

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Mon 11/23

9:00 am-5:12 pm

1 stop7h 12m

Allentown-Bethlehem

Thu 11/26

6:30 am-11:18 pm

2 stops17h 48m

$381

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 11/21

4:40 pm-10:46 pm

1 stop5h 06m

Allentown-Bethlehem

Thu 11/26

6:30 am-11:18 pm

2 stops17h 48m

$394

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 10/24

1:25 pm-9:05 pm

1 stop6h 40m

Allentown-Bethlehem

Tue 10/27

5:32 pm-9:13 pm

1 stop4h 41m

$399

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?

Prices are currently low for flights on this route.

Typical prices usually range from $379 to $383.
The lowest price recently found on this route was $317.

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 $228. If you aren’t able to travel to Allentown during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $302.

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	5h 04m
Direct flights	None

The fastest flight from St. Louis to Allentown takes 5h 04m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Allentown

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 5h 04m 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 July 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 (65% of total bookings). The next most popular airline is Delta (35%).

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 $248	Free Cancellation	Rating 7.1 11,836 reviews		Search American Airlines flights
Delta	PriceFrom $274	Free Cancellation	Rating 7.8 8,482 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.