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

American Airlines is the most popular carrier operating from Lambert-St Louis to Allentown-Bethlehem

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 45% 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.

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 May 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.

$170 Cheap Flights from St. Louis to Allentown in 2026

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 $392 to $271. The lowest price recently found on this route was $336.

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Find the cheapest flights from St. Louis to Allentown

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:12 pm - 12:23 am

STL

ABE

5h 11m

1 stop

5:12 pm - 8:31 am

ABE

STL

16h 19m

1 stop

$336American Airlines

Wed, Jul 15 - Mon, Jul 20

3:42 pm - 10:46 pm

STL

ABE

6h 04m

1 stop

6:30 am - 10:48 am

ABE

STL

5h 18m

1 stop

$338Delta

Fri, Oct 30 - Sun, Nov 1

6:25 pm - 12:30 am

STL

ABE

5h 05m

1 stop

5:11 pm - 11:59 pm

ABE

STL

7h 48m

1 stop

$339American Airlines

Sat, Aug 15 - Mon, Aug 17

5:27 pm - 12:27 pm

STL

ABE

42h 00m

2 stops

6:00 am - 11:49 pm

ABE

STL

18h 49m

1 stop

$420Multiple Airlines

Fri, Jun 5 - Thu, Jun 25

3:42 pm - 10:46 pm

STL

ABE

6h 04m

1 stop

6:30 am - 12:56 pm

ABE

STL

7h 26m

1 stop

$426Delta

Fri, Nov 6 - Mon, Nov 9

6:13 pm - 12:21 am

STL

ABE

5h 08m

1 stop

5:16 pm - 12:16 am

ABE

STL

8h 00m

1 stop

$437American Airlines

Thu, Jun 11 - Wed, Jun 17

8:00 am - 9:45 am

STL

ABE

24h 45m

1 stop

5:36 pm - 10:00 pm

ABE

STL

5h 24m

1 stop

$457United Airlines

Tue, Aug 25 - Sat, Aug 29

5:27 pm - 12:27 pm

STL

ABE

42h 00m

2 stops

3:07 pm - 11:49 pm

ABE

STL

9h 42m

1 stop

$458Multiple Airlines

Fri, Jun 5 - Sat, Jun 20

5:30 pm - 9:45 am

STL

ABE

15h 15m

1 stop

5:36 pm - 10:00 pm

ABE

STL

5h 24m

1 stop

$462United Airlines

Tue, Aug 25 - Sat, Aug 29

4:19 pm - 8:46 pm

STL

ABE

27h 27m

1 stop

6:00 am - 11:49 pm

ABE

STL

18h 49m

1 stop

$469Multiple Airlines

Fri, Jun 5 - Thu, Jun 25

American Airlines flights from St. Louis to Allentown

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

American Airlines

Jul 15

STL6:12 pmLambert-St Louis

5h 11m

1 stop

ABE12:23 amAllentown-Bethlehem

Jul 20

ABE5:12 pmAllentown-Bethlehem

16h 19m

1 stop

STL8:31 amLambert-St Louis

$336

American Airlines

Aug 15

STL6:25 pmLambert-St Louis

5h 05m

1 stop

ABE12:30 amAllentown-Bethlehem

Aug 17

ABE5:11 pmAllentown-Bethlehem

7h 48m

1 stop

STL11:59 pmLambert-St Louis

$339

American Airlines

Jun 11

STL6:13 pmLambert-St Louis

5h 08m

1 stop

ABE12:21 amAllentown-Bethlehem

Jun 17

ABE5:16 pmAllentown-Bethlehem

8h 00m

1 stop

STL12:16 amLambert-St Louis

$437

United Airlines flights from St. Louis to Allentown

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

United Airlines

May 26

STL6:00 amLambert-St Louis

6h 44m

1 stop

ABE1:44 pmAllentown-Bethlehem

May 30

ABE6:15 amAllentown-Bethlehem

5h 19m

1 stop

STL10:34 amLambert-St Louis

$339

United Airlines

Aug 25

STL8:00 amLambert-St Louis

24h 45m

1 stop

ABE9:45 amAllentown-Bethlehem

Aug 29

ABE5:36 pmAllentown-Bethlehem

5h 24m

1 stop

STL10:00 pmLambert-St Louis

$457

United Airlines

Aug 25

STL5:30 pmLambert-St Louis

15h 15m

1 stop

ABE9:45 amAllentown-Bethlehem

Aug 29

ABE5:36 pmAllentown-Bethlehem

5h 24m

1 stop

STL10:00 pmLambert-St Louis

$462

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 7/15

6:12 pm-12:23 am

1 stop5h 11m

Allentown-Bethlehem

Mon 7/20

5:12 pm-8:31 am

1 stop16h 19m

$336

Quickest round-trip

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 10/30

3:42 pm-10:46 pm

1 stop6h 04m

Allentown-Bethlehem

Sun 11/1

6:30 am-10:48 am

1 stop5h 18m

$338

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 8/15

6:25 pm-12:30 am

1 stop5h 05m

Allentown-Bethlehem

Mon 8/17

5:11 pm-11:59 pm

1 stop7h 48m

$339

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 6/5

5:27 pm-12:27 pm

2 stops42h 00m

Allentown-Bethlehem

Thu 6/25

6:00 am-11:49 pm

1 stop18h 49m

$420

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 11/6

3:42 pm-10:46 pm

1 stop6h 04m

Allentown-Bethlehem

Mon 11/9

6:30 am-12:56 pm

1 stop7h 26m

$426

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 6/11

6:13 pm-12:21 am

1 stop5h 08m

Allentown-Bethlehem

Wed 6/17

5:16 pm-12:16 am

1 stop8h 00m

$437

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 8/25

8:00 am-9:45 am

1 stop24h 45m

Allentown-Bethlehem

Sat 8/29

5:36 pm-10:00 pm

1 stop5h 24m

$457

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 6/5

5:27 pm-12:27 pm

2 stops42h 00m

Allentown-Bethlehem

Sat 6/20

3:07 pm-11:49 pm

1 stop9h 42m

$458

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 8/25

5:30 pm-9:45 am

1 stop15h 15m

Allentown-Bethlehem

Sat 8/29

5:36 pm-10:00 pm

1 stop5h 24m

$462

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 6/5

4:19 pm-8:46 pm

1 stop27h 27m

Allentown-Bethlehem

Thu 6/25

6:00 am-11:49 pm

1 stop18h 49m

$469

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 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 19m
Direct flights	None

The fastest flight from St. Louis to Allentown takes 5h 19m

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 19m 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 May 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 (68% of total bookings). The next most popular airline is Delta (32%).

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 11,662 reviews		Search American Airlines flights
Delta	PriceFrom $274	Free Cancellation	Rating 7.9 8,453 reviews		Search Delta flights

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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.