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 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 April 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 high for flights on this route. Typical prices usually range from $308 to $268. The lowest price recently found on this route was $329.

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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.

7:45 am - 1:38 pm

STL

ABE

4h 53m

1 stop

2:25 pm - 9:13 pm

ABE

STL

7h 48m

1 stop

$329United Airlines

dj., abr. 30 - dg., maig 3

4:59 pm - 11:27 am

STL

ABE

17h 28m

1 stop

1:41 pm - 6:50 am

ABE

STL

42h 09m

2 stops

$334Multiple Airlines

dl., abr. 20 - dl., abr. 27

6:00 am - 12:12 pm

STL

ABE

5h 12m

1 stop

5:59 pm - 11:36 pm

ABE

STL

6h 37m

1 stop

$339Delta

dj., abr. 30 - dt., maig 5

4:59 pm - 11:27 am

STL

ABE

17h 28m

1 stop

6:30 am - 11:19 pm

ABE

STL

17h 49m

1 stop

$346Multiple Airlines

dl., abr. 20 - dl., abr. 27

4:41 pm - 11:00 pm

STL

ABE

5h 19m

1 stop

6:33 am - 10:34 am

ABE

STL

5h 01m

1 stop

$348Delta

dc., abr. 29 - dg., maig 3

3:45 pm - 10:30 pm

STL

ABE

5h 45m

1 stop

6:05 pm - 11:53 pm

ABE

STL

6h 48m

1 stop

$357Delta

dj., juny 25 - dt., jul.. 14

4:41 pm - 11:00 pm

STL

ABE

5h 19m

1 stop

5:59 pm - 11:36 pm

ABE

STL

6h 37m

1 stop

$369Delta

dt., abr. 28 - dt., maig 5

3:45 pm - 10:30 pm

STL

ABE

5h 45m

1 stop

6:05 pm - 11:53 pm

ABE

STL

6h 48m

1 stop

$396Delta

dj., juny 25 - dv., jul.. 10

9:23 am - 5:01 pm

STL

ABE

6h 38m

1 stop

6:15 am - 12:11 pm

ABE

STL

6h 56m

1 stop

$410United Airlines

dg., juny 21 - dg., juny 28

3:40 pm - 10:27 pm

STL

ABE

5h 47m

1 stop

6:05 pm - 11:53 pm

ABE

STL

6h 48m

1 stop

$412Delta

dc., jul.. 15 - dl., jul.. 20

Delta flights from St. Louis to Allentown

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

Delta

Apr 30

STL6:00 amLambert-St Louis

5h 12m

1 stop

ABE12:12 pmAllentown-Bethlehem

May 5

ABE5:59 pmAllentown-Bethlehem

6h 37m

1 stop

STL11:36 pmLambert-St Louis

$339

Delta

Apr 29

STL4:41 pmLambert-St Louis

5h 19m

1 stop

ABE11:00 pmAllentown-Bethlehem

May 3

ABE6:33 amAllentown-Bethlehem

5h 01m

1 stop

STL10:34 amLambert-St Louis

$348

Delta

Jun 25

STL3:45 pmLambert-St Louis

5h 45m

1 stop

ABE10:30 pmAllentown-Bethlehem

Jul 14

ABE6:05 pmAllentown-Bethlehem

6h 48m

1 stop

STL11:53 pmLambert-St Louis

$357

United Airlines flights from St. Louis to Allentown

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

United Airlines

Apr 30

STL7:45 amLambert-St Louis

4h 53m

1 stop

ABE1:38 pmAllentown-Bethlehem

May 3

ABE2:25 pmAllentown-Bethlehem

7h 48m

1 stop

STL9:13 pmLambert-St Louis

$329

United Airlines

Jun 21

STL9:23 amLambert-St Louis

6h 38m

1 stop

ABE5:01 pmAllentown-Bethlehem

Jun 28

ABE6:15 amAllentown-Bethlehem

6h 56m

1 stop

STL12:11 pmLambert-St Louis

$410

United Airlines

May 1

STL7:45 amLambert-St Louis

4h 53m

1 stop

ABE1:38 pmAllentown-Bethlehem

May 6

ABE2:25 pmAllentown-Bethlehem

7h 48m

1 stop

STL9:13 pmLambert-St Louis

$414

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dj. 4/30

7:45 am-1:38 pm

1 stop4h 53m

Allentown-Bethlehem

dg. 5/3

2:25 pm-9:13 pm

1 stop7h 48m

$329

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dl. 4/20

4:59 pm-11:27 am

1 stop17h 28m

Allentown-Bethlehem

dl. 4/27

1:41 pm-6:50 am

2 stops42h 09m

$334

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dj. 4/30

6:00 am-12:12 pm

1 stop5h 12m

Allentown-Bethlehem

dt. 5/5

5:59 pm-11:36 pm

1 stop6h 37m

$339

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dl. 4/20

4:59 pm-11:27 am

1 stop17h 28m

Allentown-Bethlehem

dl. 4/27

6:30 am-11:19 pm

1 stop17h 49m

$346

Quickest round-trip

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dc. 4/29

4:41 pm-11:00 pm

1 stop5h 19m

Allentown-Bethlehem

dg. 5/3

6:33 am-10:34 am

1 stop5h 01m

$348

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dj. 6/25

3:45 pm-10:30 pm

1 stop5h 45m

Allentown-Bethlehem

dt. 7/14

6:05 pm-11:53 pm

1 stop6h 48m

$357

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dt. 4/28

4:41 pm-11:00 pm

1 stop5h 19m

Allentown-Bethlehem

dt. 5/5

5:59 pm-11:36 pm

1 stop6h 37m

$369

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dj. 6/25

3:45 pm-10:30 pm

1 stop5h 45m

Allentown-Bethlehem

dv. 7/10

6:05 pm-11:53 pm

1 stop6h 48m

$396

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dg. 6/21

9:23 am-5:01 pm

1 stop6h 38m

Allentown-Bethlehem

dg. 6/28

6:15 am-12:11 pm

1 stop6h 56m

$410

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

dc. 7/15

3:40 pm-10:27 pm

1 stop5h 47m

Allentown-Bethlehem

dl. 7/20

6:05 pm-11:53 pm

1 stop6h 48m

$412

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	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 April 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 (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 $233	Free Cancellation	Rating 7.1 11,544 reviews		Search American Airlines flights
Delta	PriceFrom $274	Free Cancellation	Rating 7.9 8,368 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.