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Cheap flights from St. Louis to Allentown from $249

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Allentown departing on 2/18. 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

Delta Logo
10:00 am - 5:13 pmSTL-ABE
6h 13m1 stop
Delta Logo
5:40 pm - 11:40 pmABE-STL
7h 00m1 stop
$249Delta
Find Deal
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
8:30 am - 2:13 pmSTL-ABE
4h 43m1 stop
American Airlines Logo
6:00 am - 12:06 pmABE-STL
7h 06m1 stop
$254American Airlines
Find Deal
Tue, Oct 7 - Wed, Oct 22
Delta Logo
6:01 am - 12:04 pmSTL-ABE
5h 03m1 stop
Delta Logo
12:48 pm - 7:05 pmABE-STL
7h 17m1 stop
$259Delta
Find Deal
Tue, Sep 30 - Sat, Oct 4
American Airlines Logo
5:00 am - 1:29 pmSTL-ABE
7h 29m1 stop
American Airlines Logo
5:10 pm - 12:05 amABE-STL
7h 55m1 stop
$284American Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
Delta Logo
10:00 am - 5:13 pmSTL-ABE
6h 13m1 stop
Delta Logo
6:30 am - 10:50 amABE-STL
5h 20m1 stop
$319Delta
Find Deal
Thu, Feb 26 - Sun, Mar 1
United Airlines Logo
9:20 am - 4:53 pmSTL-ABE
6h 33m1 stop
United Airlines Logo
5:28 pm - 10:35 pmABE-STL
6h 07m1 stop
$329United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Multiple Airlines Logo
12:20 pm - 12:05 pmSTL-ABE
22h 45m2 stops
Multiple Airlines Logo
6:24 pm - 9:40 amABE-STL
16h 16m1 stop
$339Multiple Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
American Airlines Logo
12:58 pm - 12:16 amSTL-ABE
10h 18m2 stops
American Airlines Logo
1:43 pm - 5:13 pmABE-STL
4h 30m1 stop
$352American Airlines
Find Deal
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
5:00 am - 1:29 pmSTL-ABE
7h 29m1 stop
American Airlines Logo
5:10 pm - 12:05 amABE-STL
7h 55m1 stop
$354American Airlines
Find Deal
Thu, Nov 20 - Fri, Nov 28
United Airlines Logo
3:23 pm - 9:54 pmSTL-ABE
5h 31m1 stop
United Airlines Logo
1:00 pm - 10:49 amABE-STL
22h 49m1 stop
$527United Airlines
Find Deal
Mon, Sep 29 - Fri, Oct 3

American Airlines flights from St. Louis to Allentown

Our best American Airlines deals on St. Louis to Allentown flight tickets
American Airlines
Oct 7
STL8:30 amLambert-St Louis
4h 43m
1 stop
ABE2:13 pmAllentown-Bethlehem
Oct 22
ABE6:00 amAllentown-Bethlehem
7h 06m
1 stop
STL12:06 pmLambert-St Louis
$254
Find similar
American Airlines
Nov 6
STL5:00 amLambert-St Louis
7h 29m
1 stop
ABE1:29 pmAllentown-Bethlehem
Nov 9
ABE5:10 pmAllentown-Bethlehem
7h 55m
1 stop
STL12:05 amLambert-St Louis
$284
Find similar
American Airlines
Feb 18
STL12:58 pmLambert-St Louis
10h 18m
2 stops
ABE12:16 amAllentown-Bethlehem
Feb 21
ABE1:43 pmAllentown-Bethlehem
4h 30m
1 stop
STL5:13 pmLambert-St Louis
$352
Find similar

United Airlines flights from St. Louis to Allentown

Our best United Airlines deals on St. Louis to Allentown flight tickets
United Airlines
Sep 30
STL9:20 amLambert-St Louis
6h 33m
1 stop
ABE4:53 pmAllentown-Bethlehem
Oct 4
ABE5:28 pmAllentown-Bethlehem
6h 07m
1 stop
STL10:35 pmLambert-St Louis
$329
Find similar
United Airlines
Sep 29
STL3:23 pmLambert-St Louis
5h 31m
1 stop
ABE9:54 pmAllentown-Bethlehem
Oct 3
ABE1:00 pmAllentown-Bethlehem
22h 49m
1 stop
STL10:49 amLambert-St Louis
$527
Find similar
United Airlines
Sep 23
STL6:35 amLambert-St Louis
4h 23m
1 stop
ABE11:58 amAllentown-Bethlehem
Sep 29
ABE5:28 pmAllentown-Bethlehem
5h 09m
1 stop
STL9:37 pmLambert-St Louis
$618
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 September 17, 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

10:00 am-5:13 pm

1 stop6h 13m

Allentown-Bethlehem

Sat 2/21

5:40 pm-11:40 pm

1 stop7h 00m

$249

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 10/7

8:30 am-2:13 pm

1 stop4h 43m

Allentown-Bethlehem

Wed 10/22

6:00 am-12:06 pm

1 stop7h 06m

$254

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 9/30

6:01 am-12:04 pm

1 stop5h 03m

Allentown-Bethlehem

Sat 10/4

12:48 pm-7:05 pm

1 stop7h 17m

$259

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 11/6

5:00 am-1:29 pm

1 stop7h 29m

Allentown-Bethlehem

Sun 11/9

5:10 pm-12:05 am

1 stop7h 55m

$284

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 2/26

10:00 am-5:13 pm

1 stop6h 13m

Allentown-Bethlehem

Sun 3/1

6:30 am-10:50 am

1 stop5h 20m

$319

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Tue 9/30

9:20 am-4:53 pm

1 stop6h 33m

Allentown-Bethlehem

Sat 10/4

5:28 pm-10:35 pm

1 stop6h 07m

$329

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 11/6

12:20 pm-12:05 pm

2 stops22h 45m

Allentown-Bethlehem

Sun 11/9

6:24 pm-9:40 am

1 stop16h 16m

$339

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 2/18

12:58 pm-12:16 am

2 stops10h 18m

Allentown-Bethlehem

Sat 2/21

1:43 pm-5:13 pm

1 stop4h 30m

$352

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 11/20

5:00 am-1:29 pm

1 stop7h 29m

Allentown-Bethlehem

Fri 11/28

5:10 pm-12:05 am

1 stop7h 55m

$354

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Mon 9/29

3:23 pm-9:54 pm

1 stop5h 31m

Allentown-Bethlehem

Fri 10/3

1:00 pm-10:49 am

1 stop22h 49m

$527

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 October is, on average, the cheapest month to fly to Allentown from St. Louis, with most prices found around $258. If you aren’t able to travel to Allentown during the month of October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $305.

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 23m 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
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $303Free CancellationRating
7.9
7,961 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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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.

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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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