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Cheap flights from Allentown to St. Louis from $202

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Allentown to St. Louis departing on 8/18. 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 Allentown to St. Louis

Cheap round-trip flights

American Airlines Logo
6:32 pm - 11:05 pmABE-STL
5h 33m1 stop
American Airlines Logo
8:43 am - 2:26 pmSTL-ABE
4h 43m1 stop
$249American Airlines
Find Deal
Tue, Aug 26 - Tue, Sep 2
Delta Logo
6:14 pm - 11:14 pmABE-STL
6h 00m1 stop
Delta Logo
5:11 pm - 10:57 pmSTL-ABE
4h 46m1 stop
$254Delta
Find Deal
Thu, Aug 21 - Sun, Aug 24
American Airlines Logo
6:32 pm - 11:05 pmABE-STL
5h 33m1 stop
American Airlines Logo
7:32 am - 1:26 pmSTL-ABE
4h 54m1 stop
$259American Airlines
Find Deal
Fri, Aug 15 - Sun, Aug 17
American Airlines Logo
1:56 pm - 7:18 pmABE-STL
6h 22m1 stop
American Airlines Logo
2:11 pm - 9:50 pmSTL-ABE
6h 39m1 stop
$293American Airlines
Find Deal
Sat, Aug 30 - Fri, Sep 5
Delta Logo
6:14 pm - 10:02 pmABE-STL
4h 48m1 stop
Delta Logo
3:36 pm - 10:27 pmSTL-ABE
5h 51m1 stop
$299Delta
Find Deal
Tue, Aug 12 - Sat, Aug 16
American Airlines Logo
6:32 pm - 11:05 pmABE-STL
5h 33m1 stop
American Airlines Logo
7:32 am - 1:14 pmSTL-ABE
4h 42m1 stop
$318American Airlines
Find Deal
Wed, Aug 27 - Mon, Sep 1
Delta Logo
6:14 pm - 10:02 pmABE-STL
4h 48m1 stop
Delta Logo
3:36 pm - 10:27 pmSTL-ABE
5h 51m1 stop
$324Delta
Find Deal
Tue, Aug 12 - Sat, Aug 16
Delta Logo
6:14 pm - 10:02 pmABE-STL
4h 48m1 stop
Delta Logo
5:11 pm - 10:57 pmSTL-ABE
4h 46m1 stop
$329Delta
Find Deal
Tue, Aug 12 - Sun, Aug 17
Delta Logo
6:14 pm - 10:02 pmABE-STL
4h 48m1 stop
Delta Logo
3:36 pm - 10:27 pmSTL-ABE
5h 51m1 stop
$339Delta
Find Deal
Wed, Aug 13 - Sat, Aug 16
United Airlines Logo
1:00 pm - 10:49 amABE-STL
22h 49m1 stop
United Airlines Logo
5:00 am - 10:38 amSTL-ABE
4h 38m1 stop
$670United Airlines
Find Deal
Fri, Oct 3 - Sun, Oct 12

American Airlines flights from Allentown to St. Louis

Our best American Airlines deals on Allentown to St. Louis flight tickets
American Airlines
Aug 26
ABE6:32 pmAllentown-Bethlehem
5h 33m
1 stop
STL11:05 pmLambert-St Louis
Sep 2
STL8:43 amLambert-St Louis
4h 43m
1 stop
ABE2:26 pmAllentown-Bethlehem
$249
Find similar
American Airlines
Aug 15
ABE6:32 pmAllentown-Bethlehem
5h 33m
1 stop
STL11:05 pmLambert-St Louis
Aug 17
STL7:32 amLambert-St Louis
4h 54m
1 stop
ABE1:26 pmAllentown-Bethlehem
$259
Find similar
American Airlines
Aug 30
ABE1:56 pmAllentown-Bethlehem
6h 22m
1 stop
STL7:18 pmLambert-St Louis
Sep 5
STL2:11 pmLambert-St Louis
6h 39m
1 stop
ABE9:50 pmAllentown-Bethlehem
$293
Find similar

Delta flights from Allentown to St. Louis

Our best Delta deals on Allentown to St. Louis flight tickets
Delta
Aug 21
ABE6:14 pmAllentown-Bethlehem
6h 00m
1 stop
STL11:14 pmLambert-St Louis
Aug 24
STL5:11 pmLambert-St Louis
4h 46m
1 stop
ABE10:57 pmAllentown-Bethlehem
$254
Find similar
Delta
Aug 12
ABE6:14 pmAllentown-Bethlehem
4h 48m
1 stop
STL10:02 pmLambert-St Louis
Aug 16
STL3:36 pmLambert-St Louis
5h 51m
1 stop
ABE10:27 pmAllentown-Bethlehem
$299
Find similar
Delta
Aug 12
ABE6:14 pmAllentown-Bethlehem
4h 48m
1 stop
STL10:02 pmLambert-St Louis
Aug 16
STL3:36 pmLambert-St Louis
5h 51m
1 stop
ABE10:27 pmAllentown-Bethlehem
$324
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Allentown to St. Louis 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 Allentown to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 8/26

6:32 pm-11:05 pm

1 stop5h 33m

Lambert-St Louis

Tue 9/2

8:43 am-2:26 pm

1 stop4h 43m

$249

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 8/21

6:14 pm-11:14 pm

1 stop6h 00m

Lambert-St Louis

Sun 8/24

5:11 pm-10:57 pm

1 stop4h 46m

$254

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 8/15

6:32 pm-11:05 pm

1 stop5h 33m

Lambert-St Louis

Sun 8/17

7:32 am-1:26 pm

1 stop4h 54m

$259

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 8/30

1:56 pm-7:18 pm

1 stop6h 22m

Lambert-St Louis

Fri 9/5

2:11 pm-9:50 pm

1 stop6h 39m

$293

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 8/12

6:14 pm-10:02 pm

1 stop4h 48m

Lambert-St Louis

Sat 8/16

3:36 pm-10:27 pm

1 stop5h 51m

$299

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Wed 8/27

6:32 pm-11:05 pm

1 stop5h 33m

Lambert-St Louis

Mon 9/1

7:32 am-1:14 pm

1 stop4h 42m

$318

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 8/12

6:14 pm-10:02 pm

1 stop4h 48m

Lambert-St Louis

Sat 8/16

3:36 pm-10:27 pm

1 stop5h 51m

$324

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 8/12

6:14 pm-10:02 pm

1 stop4h 48m

Lambert-St Louis

Sun 8/17

5:11 pm-10:57 pm

1 stop4h 46m

$329

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Wed 8/13

6:14 pm-10:02 pm

1 stop4h 48m

Lambert-St Louis

Sat 8/16

3:36 pm-10:27 pm

1 stop5h 51m

$339

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 10/3

1:00 pm-10:49 am

1 stop22h 49m

Lambert-St Louis

Sun 10/12

5:00 am-10:38 am

1 stop4h 38m

$670

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Allentown to St. Louis

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 St. Louis?

In general, September is the cheapest month to fly from Allentown to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $258. The month of June is another great option to travel to St. Louis, with average flight prices from Allentown averaging around $278.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $263. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $491. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Allentown in the evening is the least expensive time of day to depart. momondo users have found prices as low as $254 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $318 per ticket.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Allentown when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $323 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Allentown for as low as $277 on momondo.

When to book flights from Allentown to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Allentown to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Allentown to St. Louis (ABE to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Allentown to St. Louis

Best Price Found

$202

Fastest flight time

4h 29m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Allentown in the past 72 hours is $202. The best round-trip flight deal from Allentown to St. Louis found on momondo in the last 72 hours is $249.
The fastest flight from Allentown to St. Louis takes 4h 29m
There are no direct flights from Allentown to St. Louis. Popular non-direct route for this connection is Allentown-Bethlehem Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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  • How far is Allentown-Bethlehem to Lambert-St Louis by plane?

    There are 794.2 mi between Allentown-Bethlehem and Lambert-St Louis. In terms of flight time, this usually takes a little over 4h 41m.

  • When did momondo last update prices for flights from Allentown-Bethlehem Airport to Lambert-St Louis Airport?

    Prices for flights from Allentown-Bethlehem Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Allentown-Bethlehem Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Allentown-Bethlehem Airport to Lambert-St Louis Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Allentown-Bethlehem Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Allentown to St. Louis?

Best airlines flying from Allentown to St. Louis

Compare and see reviews for airlines that fly from Allentown to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $228Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $236Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
DeltaPriceFrom $242Free CancellationRating
8.0
7,981 reviews
Search Delta flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
Shrewsbury
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Allentown to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Allentown to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Allentown to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from Allentown on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Allentown to St. Louis?

Once you have performed a search for Allentown to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Allentown to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Allentown 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 St. Louis trip

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