Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Allentown from $231

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 8/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Allentown

Cheap round-trip flights

American Airlines Logo
8:43 am - 2:26 pmSTL-ABE
4h 43m1 stop
American Airlines Logo
6:32 pm - 11:05 pmABE-STL
5h 33m1 stop
$249American Airlines
Find Deal
Wed, Aug 27 - Tue, Sep 2
American Airlines Logo
3:53 pm - 9:44 pmSTL-ABE
4h 51m1 stop
American Airlines Logo
6:32 pm - 11:05 pmABE-STL
5h 33m1 stop
$259American Airlines
Find Deal
Fri, Aug 15 - Mon, Aug 18
American Airlines Logo
7:23 am - 1:26 pmSTL-ABE
5h 03m1 stop
American Airlines Logo
2:00 pm - 11:56 pmABE-STL
10h 56m2 stops
$274American Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
American Airlines Logo
2:11 pm - 9:50 pmSTL-ABE
6h 39m1 stop
American Airlines Logo
7:00 pm - 11:07 pmABE-STL
5h 07m1 stop
$318American Airlines
Find Deal
Fri, Sep 26 - Tue, Sep 30
Delta Logo
5:11 pm - 10:57 pmSTL-ABE
4h 46m1 stop
Delta Logo
6:14 pm - 11:14 pmABE-STL
6h 00m1 stop
$329Delta
Find Deal
Thu, Aug 14 - Mon, Aug 18
Logo
2:30 pm - 10:53 pmSTL-ABE
7h 23m2 stops
Logo
6:30 am - 6:41 pmABE-STL
13h 11m3 stops
$396
Find Deal
Fri, Aug 15 - Mon, Aug 18
Logo
9:50 am - 9:00 pmSTL-ABE
10h 10m2 stops
Logo
6:30 am - 6:41 pmABE-STL
13h 11m3 stops
$418
Find Deal
Thu, Aug 14 - Mon, Aug 18
United Airlines Logo
5:15 am - 9:55 pmSTL-ABE
15h 40m2 stops
United Airlines Logo
1:00 pm - 3:44 pmABE-STL
27h 44m1 stop
$676United Airlines
Find Deal
Thu, Aug 14 - Tue, Aug 19
United Airlines Logo
6:35 am - 11:58 amSTL-ABE
4h 23m1 stop
United Airlines Logo
5:28 pm - 4:53 pmABE-STL
24h 25m3 stops
$742United Airlines
Find Deal
Wed, Aug 27 - Tue, Sep 2
Delta Logo
6:00 am - 1:34 pmSTL-ABE
6h 34m1 stop
Delta Logo
6:30 am - 8:10 amABE-STL
26h 40m1 stop
$753Delta
Find Deal
Thu, Nov 27 - Sun, Nov 30

United Airlines flights from St. Louis to Allentown

Our best United Airlines deals on St. Louis to Allentown flight tickets
United Airlines
Aug 14
STL5:15 amLambert-St Louis
15h 40m
2 stops
ABE9:55 pmAllentown-Bethlehem
Aug 19
ABE1:00 pmAllentown-Bethlehem
27h 44m
1 stop
STL3:44 pmLambert-St Louis
$676
Find similar
United Airlines
Aug 27
STL6:35 amLambert-St Louis
4h 23m
1 stop
ABE11:58 amAllentown-Bethlehem
Sep 2
ABE5:28 pmAllentown-Bethlehem
24h 25m
3 stops
STL4:53 pmLambert-St Louis
$742
Find similar
United Airlines
Aug 15
STL10:00 amLambert-St Louis
10h 55m
1 stop
ABE9:55 pmAllentown-Bethlehem
Aug 19
ABE1:00 pmAllentown-Bethlehem
7h 27m
1 stop
STL7:27 pmLambert-St Louis
$743
Find similar

American Airlines flights from St. Louis to Allentown

Our best American Airlines deals on St. Louis to Allentown flight tickets
American Airlines
Aug 27
STL8:43 amLambert-St Louis
4h 43m
1 stop
ABE2:26 pmAllentown-Bethlehem
Sep 2
ABE6:32 pmAllentown-Bethlehem
5h 33m
1 stop
STL11:05 pmLambert-St Louis
$249
Find similar
American Airlines
Aug 15
STL3:53 pmLambert-St Louis
4h 51m
1 stop
ABE9:44 pmAllentown-Bethlehem
Aug 18
ABE6:32 pmAllentown-Bethlehem
5h 33m
1 stop
STL11:05 pmLambert-St Louis
$259
Find similar
American Airlines
Nov 1
STL7:23 amLambert-St Louis
5h 03m
1 stop
ABE1:26 pmAllentown-Bethlehem
Nov 8
ABE2:00 pmAllentown-Bethlehem
10h 56m
2 stops
STL11:56 pmLambert-St Louis
$274
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 July 31, 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 8/27

8:43 am-2:26 pm

1 stop4h 43m

Allentown-Bethlehem

Tue 9/2

6:32 pm-11:05 pm

1 stop5h 33m

$249

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 8/15

3:53 pm-9:44 pm

1 stop4h 51m

Allentown-Bethlehem

Mon 8/18

6:32 pm-11:05 pm

1 stop5h 33m

$259

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Sat 11/1

7:23 am-1:26 pm

1 stop5h 03m

Allentown-Bethlehem

Sat 11/8

2:00 pm-11:56 pm

2 stops10h 56m

$274

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 9/26

2:11 pm-9:50 pm

1 stop6h 39m

Allentown-Bethlehem

Tue 9/30

7:00 pm-11:07 pm

1 stop5h 07m

$318

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 8/14

5:11 pm-10:57 pm

1 stop4h 46m

Allentown-Bethlehem

Mon 8/18

6:14 pm-11:14 pm

1 stop6h 00m

$329

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Fri 8/15

2:30 pm-10:53 pm

2 stops7h 23m

Allentown-Bethlehem

Mon 8/18

6:30 am-6:41 pm

3 stops13h 11m

$396

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 8/14

9:50 am-9:00 pm

2 stops10h 10m

Allentown-Bethlehem

Mon 8/18

6:30 am-6:41 pm

3 stops13h 11m

$418

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 8/14

5:15 am-9:55 pm

2 stops15h 40m

Allentown-Bethlehem

Tue 8/19

1:00 pm-3:44 pm

1 stop27h 44m

$676

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Wed 8/27

6:35 am-11:58 am

1 stop4h 23m

Allentown-Bethlehem

Tue 9/2

5:28 pm-4:53 pm

3 stops24h 25m

$742

St. LouisAllentown

STL - ABE

STLABE

Lambert-St Louis

Thu 11/27

6:00 am-1:34 pm

1 stop6h 34m

Allentown-Bethlehem

Sun 11/30

6:30 am-8:10 am

1 stop26h 40m

$753

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 cheapest month to fly to Allentown?

The month of August is, on average, the cheapest month to fly to Allentown from St. Louis, with most prices found around $303. If you aren’t able to travel to Allentown during the month of August, 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

Best Price Found

$231

Fastest flight time

4h 14m

Direct flights

None

Airports in Allentown

1 airport
The best one-way flight to Allentown from St. Louis in the past 72 hours is $231. The best round-trip flight deal from St. Louis to Allentown found on momondo in the last 72 hours is $249.
The fastest flight from St. Louis to Allentown takes 4h 14m
There are no direct flights from St. Louis to Allentown. Popular non-direct route for this connection is Lambert-St Louis Airport - Allentown-Bethlehem Airport.
There is 1 airport near Allentown: Allentown-Bethlehem (ABE)
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 14m 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
United AirlinesPriceFrom $223Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
American AirlinesPriceFrom $233Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $303Free CancellationRating
8.0
7,981 reviews
Search Delta flights

Traveling to a place near Allentown?

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

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.

An easier way to manage your Allentown trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/5
Tue 8/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States