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Cheap flights from St. Louis to Allentown from $113

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Allentown departing on 11/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Allentown

Cheap round-trip flights

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Delta Logo
10:13 am - 5:18 pmSTL-ABE
6h 05m1 stop
Delta Logo
5:58 pm - 11:38 pmABE-STL
6h 40m1 stop
$249Delta
Find Deal
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
8:13 am - 3:53 pmSTL-ABE
6h 40m1 stop
American Airlines Logo
5:15 pm - 11:55 pmABE-STL
7h 40m1 stop
$418American Airlines
Find Deal
Wed, Dec 17 - Sun, Dec 28
American Airlines Logo
6:00 am - 11:25 pmSTL-ABE
16h 25m2 stops
American Airlines Logo
12:01 pm - 6:10 pmABE-STL
7h 09m1 stop
$438American Airlines
Find Deal
Wed, Feb 18 - Sat, Feb 21
Multiple Airlines Logo
3:30 pm - 8:36 pmSTL-ABE
28h 06m1 stop
Multiple Airlines Logo
1:09 pm - 9:45 amABE-STL
21h 36m2 stops
$483Multiple Airlines
Find Deal
Wed, Dec 17 - Sun, Dec 28
United Airlines Logo
6:30 am - 11:52 amSTL-ABE
4h 22m1 stop
United Airlines Logo
6:17 am - 12:27 pmABE-STL
7h 10m1 stop
$527United Airlines
Find Deal
Mon, Dec 15 - Fri, Dec 19
Multiple Airlines Logo
11:51 am - 7:13 pmSTL-ABE
30h 22m1 stop
Multiple Airlines Logo
1:09 pm - 9:45 amABE-STL
21h 36m2 stops
$596Multiple Airlines
Find Deal
Thu, Dec 18 - Sun, Dec 28
American Airlines Logo
6:05 am - 11:29 pmSTL-ABE
16h 24m1 stop
American Airlines Logo
6:04 am - 5:24 pmABE-STL
12h 20m1 stop
$663American Airlines
Find Deal
Thu, Dec 18 - Sun, Dec 28
United Airlines Logo
6:30 am - 4:47 pmSTL-ABE
9h 17m1 stop
United Airlines Logo
5:22 pm - 9:40 pmABE-STL
5h 18m1 stop
$712United Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
United Airlines Logo
6:15 am - 4:47 pmSTL-ABE
9h 32m2 stops
United Airlines Logo
5:22 pm - 9:40 pmABE-STL
5h 18m1 stop
$766United Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
Delta Logo
9:33 am - 5:19 pmSTL-ABE
6h 46m1 stop
Delta Logo
12:56 pm - 6:35 pmABE-STL
6h 39m1 stop
$779Delta
Find Deal
Sun, Nov 16 - Tue, Nov 18

Delta flights from St. Louis to Allentown

Our best Delta deals on St. Louis to Allentown flight tickets
Delta
Feb 18
STL10:13 amLambert-St Louis
6h 05m
1 stop
ABE5:18 pmAllentown-Bethlehem
Feb 21
ABE5:58 pmAllentown-Bethlehem
6h 40m
1 stop
STL11:38 pmLambert-St Louis
$249
Find similar
Delta
Nov 10
STL1:55 pmLambert-St Louis
7h 17m
1 stop
ABE10:12 pmAllentown-Bethlehem
Nov 17
ABE6:00 pmAllentown-Bethlehem
6h 44m
1 stop
STL11:44 pmLambert-St Louis
$683
Find similar
Delta
Nov 16
STL9:33 amLambert-St Louis
6h 46m
1 stop
ABE5:19 pmAllentown-Bethlehem
Nov 18
ABE12:56 pmAllentown-Bethlehem
6h 39m
1 stop
STL6:35 pmLambert-St Louis
$779
Find similar

United Airlines flights from St. Louis to Allentown

Our best United Airlines deals on St. Louis to Allentown flight tickets
United Airlines
Dec 15
STL6:30 amLambert-St Louis
4h 22m
1 stop
ABE11:52 amAllentown-Bethlehem
Dec 19
ABE6:17 amAllentown-Bethlehem
7h 10m
1 stop
STL12:27 pmLambert-St Louis
$527
Find similar
United Airlines
Nov 20
STL6:30 amLambert-St Louis
9h 17m
1 stop
ABE4:47 pmAllentown-Bethlehem
Nov 24
ABE5:22 pmAllentown-Bethlehem
5h 18m
1 stop
STL9:40 pmLambert-St Louis
$712
Find similar
United Airlines
Nov 20
STL6:15 amLambert-St Louis
9h 32m
2 stops
ABE4:47 pmAllentown-Bethlehem
Nov 24
ABE5:22 pmAllentown-Bethlehem
5h 18m
1 stop
STL9:40 pmLambert-St Louis
$766
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Allentown that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 6, 2025.
Use the filters below to find and compare flights from St. Louis to Allentown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 2/18

10:13 am-5:18 pm

1 stop6h 05m

Allentown-Bethlehem

Sat 2/21

5:58 pm-11:38 pm

1 stop6h 40m

$249

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 12/17

8:13 am-3:53 pm

1 stop6h 40m

Allentown-Bethlehem

Sun 12/28

5:15 pm-11:55 pm

1 stop7h 40m

$418

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 2/18

6:00 am-11:25 pm

2 stops16h 25m

Allentown-Bethlehem

Sat 2/21

12:01 pm-6:10 pm

1 stop7h 09m

$438

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 12/17

3:30 pm-8:36 pm

1 stop28h 06m

Allentown-Bethlehem

Sun 12/28

1:09 pm-9:45 am

2 stops21h 36m

$483

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Mon 12/15

6:30 am-11:52 am

1 stop4h 22m

Allentown-Bethlehem

Fri 12/19

6:17 am-12:27 pm

1 stop7h 10m

$527

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 12/18

11:51 am-7:13 pm

1 stop30h 22m

Allentown-Bethlehem

Sun 12/28

1:09 pm-9:45 am

2 stops21h 36m

$596

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 12/18

6:05 am-11:29 pm

1 stop16h 24m

Allentown-Bethlehem

Sun 12/28

6:04 am-5:24 pm

1 stop12h 20m

$663

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 11/20

6:30 am-4:47 pm

1 stop9h 17m

Allentown-Bethlehem

Mon 11/24

5:22 pm-9:40 pm

1 stop5h 18m

$712

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 11/20

6:15 am-4:47 pm

2 stops9h 32m

Allentown-Bethlehem

Mon 11/24

5:22 pm-9:40 pm

1 stop5h 18m

$766

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sun 11/16

9:33 am-5:19 pm

1 stop6h 46m

Allentown-Bethlehem

Tue 11/18

12:56 pm-6:35 pm

1 stop6h 39m

$779

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to Allentown from

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

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 October is also cheap. Prices for this month can be found on momondo for an average of $303.

What is the cheapest day to depart on your flight to Allentown?

The cheapest day to depart from St. Louis to Allentown is on a Saturday when prices can be found for as low as $259. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Allentown on Monday is $522.

What is the cheapest time of day to depart on your flight to Allentown?

At noon is the cheapest time of day to fly from St. Louis to Allentown when you can find flight prices for as low as $233. Flying to Allentown at noon is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $348.

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

Direct flights

None
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 18m 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?

  • 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?

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 AirlinesPriceFrom $228Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
DeltaPriceFrom $303Free CancellationRating
7.9
8,001 reviews
Search Delta flights

Traveling to a place near Allentown?

Book flights to Allentown if you plan to visit one of these locations
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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.

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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.

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