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

American Airlines, Delta, and United Airlines are the most popular carriers 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 47% 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.

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 September 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.

$148 Cheap Flights from St. Louis to Allentown in 2026/27

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.

2:00 pm - 9:22 amSTL Lambert-St Louis-ABE Allentown-Bethlehem

18h 22m2 stops Jonesboro Nashville Intl

4:32 pm - 11:13 pmABE Allentown-Bethlehem-STL Lambert-St Louis

7h 41m1 stop Orlando

$362Multiple Airlines

Wed, Oct 14 - Mon, Oct 19

11:35 am - 5:41 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

5h 06m1 stop Chicago O'Hare Intl

6:15 pm - 11:59 pmABE Allentown-Bethlehem-STL Lambert-St Louis

6h 44m1 stop Chicago O'Hare Intl

$372American Airlines

Sun, Nov 15 - Wed, Nov 18

12:00 pm - 5:16 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

4h 16m1 stop Atlanta Hartsfield-Jackson

6:03 pm - 11:54 pmABE Allentown-Bethlehem-STL Lambert-St Louis

6h 51m1 stop Atlanta Hartsfield-Jackson

$389Delta

Sat, Oct 10 - Wed, Oct 14

4:30 pm - 10:28 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

28h 58m1 stop Orlando

4:32 pm - 11:13 pmABE Allentown-Bethlehem-STL Lambert-St Louis

7h 41m1 stop Orlando

$398Multiple Airlines

Thu, Oct 15 - Mon, Oct 19

6:35 pm - 2:16 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

18h 41m2 stops Atlanta Hartsfield-Jackson Fort Lauderdale

7:30 am - 7:15 pmABE Allentown-Bethlehem-STL Lambert-St Louis

12h 45m1 stop Denver Intl

$411Multiple Airlines

Wed, Oct 14 - Fri, Oct 16

11:31 am - 6:14 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

5h 43m1 stop Chicago O'Hare Intl

6:47 pm - 10:51 amABE Allentown-Bethlehem-STL Lambert-St Louis

17h 04m1 stop Chicago O'Hare Intl

$436American Airlines

Sun, Oct 18 - Sun, Oct 25

11:13 am - 5:52 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

5h 39m1 stop Chicago O'Hare Intl

5:42 am - 10:34 amABE Allentown-Bethlehem-STL Lambert-St Louis

5h 52m1 stop Chicago O'Hare Intl

$455American Airlines

Thu, Nov 26 - Mon, Nov 30

2:25 pm - 10:19 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

6h 54m1 stop Atlanta Hartsfield-Jackson

6:03 pm - 11:54 pmABE Allentown-Bethlehem-STL Lambert-St Louis

6h 51m1 stop Atlanta Hartsfield-Jackson

$504Delta

Sat, Oct 10 - Mon, Oct 12

4:30 pm - 10:28 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

28h 58m1 stop Orlando

7:40 am - 5:40 pmABE Allentown-Bethlehem-STL Lambert-St Louis

35h 00m2 stops Fort Lauderdale Atlanta Hartsfield-Jackson

$521Multiple Airlines

Sun, Oct 18 - Sun, Oct 25

2:31 pm - 10:27 pmSTL Lambert-St Louis-ABE Allentown-Bethlehem

6h 56m1 stop Atlanta Hartsfield-Jackson

6:00 pm - 11:56 pmABE Allentown-Bethlehem-STL Lambert-St Louis

6h 56m1 stop Atlanta Hartsfield-Jackson

$527Delta

Wed, Nov 25 - Mon, Nov 30

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American Airlines flights from St. Louis to Allentown

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

American Airlines

Nov 15

STL11:35 amLambert-St Louis

5h 06m

1 stop

ABE5:41 pmAllentown-Bethlehem

Nov 18

ABE6:15 pmAllentown-Bethlehem

6h 44m

1 stop

STL11:59 pmLambert-St Louis

$372

American Airlines

Oct 18

STL11:31 amLambert-St Louis

5h 43m

1 stop

ABE6:14 pmAllentown-Bethlehem

Oct 25

ABE6:47 pmAllentown-Bethlehem

17h 04m

1 stop

STL10:51 amLambert-St Louis

$436

American Airlines

Nov 26

STL11:13 amLambert-St Louis

5h 39m

1 stop

ABE5:52 pmAllentown-Bethlehem

Nov 30

ABE5:42 amAllentown-Bethlehem

5h 52m

1 stop

STL10:34 amLambert-St Louis

$455

United Airlines flights from St. Louis to Allentown

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

United Airlines

Oct 31

STL11:15 amLambert-St Louis

4h 41m

1 stop

ABE4:56 pmAllentown-Bethlehem

Nov 3

ABE5:36 pmAllentown-Bethlehem

5h 04m

1 stop

STL9:40 pmLambert-St Louis

$545

United Airlines

Oct 31

STL11:15 amLambert-St Louis

4h 41m

1 stop

ABE4:56 pmAllentown-Bethlehem

Nov 3

ABE5:36 pmAllentown-Bethlehem

5h 04m

1 stop

STL9:40 pmLambert-St Louis

$582

United Airlines

Oct 31

STL11:15 amLambert-St Louis

4h 41m

1 stop

ABE4:56 pmAllentown-Bethlehem

Nov 3

ABE5:36 pmAllentown-Bethlehem

5h 04m

1 stop

STL9:40 pmLambert-St Louis

$583

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Wed 10/14

2:00 pm-9:22 am

2 stops18h 22m

Allentown-Bethlehem

Mon 10/19

4:32 pm-11:13 pm

1 stop7h 41m

$362

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Sun 11/15

11:35 am-5:41 pm

1 stop5h 06m

Allentown-Bethlehem

Wed 11/18

6:15 pm-11:59 pm

1 stop6h 44m

$372

Quickest round-trip

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Sat 10/10

12:00 pm-5:16 pm

1 stop4h 16m

Allentown-Bethlehem

Wed 10/14

6:03 pm-11:54 pm

1 stop6h 51m

$389

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Thu 10/15

4:30 pm-10:28 pm

1 stop28h 58m

Allentown-Bethlehem

Mon 10/19

4:32 pm-11:13 pm

1 stop7h 41m

$398

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Wed 10/14

6:35 pm-2:16 pm

2 stops18h 41m

Allentown-Bethlehem

Fri 10/16

7:30 am-7:15 pm

1 stop12h 45m

$411

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Sun 10/18

11:31 am-6:14 pm

1 stop5h 43m

Allentown-Bethlehem

Sun 10/25

6:47 pm-10:51 am

1 stop17h 04m

$436

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Thu 11/26

11:13 am-5:52 pm

1 stop5h 39m

Allentown-Bethlehem

Mon 11/30

5:42 am-10:34 am

1 stop5h 52m

$455

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Sat 10/10

2:25 pm-10:19 pm

1 stop6h 54m

Allentown-Bethlehem

Mon 10/12

6:03 pm-11:54 pm

1 stop6h 51m

$504

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Sun 10/18

4:30 pm-10:28 pm

1 stop28h 58m

Allentown-Bethlehem

Sun 10/25

7:40 am-5:40 pm

2 stops35h 00m

$521

St. LouisAllentown

STL Lambert-St Louis - ABE Allentown-Bethlehem

STLABE

Lambert-St Louis

Wed 11/25

2:31 pm-10:27 pm

1 stop6h 56m

Allentown-Bethlehem

Mon 11/30

6:00 pm-11:56 pm

1 stop6h 56m

$527

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 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 $0. 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

Best Price Found	$148
Fastest flight time	4h 16m
Direct flights	None

The best one-way flight to Allentown from St. Louis in the past 72 hours is $148. The best round-trip flight deal from St. Louis to Allentown found on momondo in the last 72 hours is $362.

The fastest flight from St. Louis to Allentown takes 4h 16m

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 4h 16m 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 September 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 Delta (56% of total bookings). The next most popular airline is American Airlines (44%).

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 $253	Free Cancellation	Rating 7.0 12,089 reviews		Search American Airlines flights
Delta	PriceFrom $274	Free Cancellation	Rating 7.8 8,603 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.