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Cheap flights from Allentown to St. Louis from $210

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 12/25. 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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0 bags

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Find the cheapest flights from Allentown to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:59 pm - 11:39 pm
ABE
-
STL
6h 40m1 stop
Delta Logo
6:00 am - 12:05 pm
STL
-
ABE
5h 05m1 stop
$243Delta
Tue, Jan 13 - Tue, Jan 20
Delta Logo
5:59 pm - 11:39 pm
ABE
-
STL
6h 40m1 stop
Delta Logo
6:00 am - 12:05 pm
STL
-
ABE
5h 05m1 stop
$289Delta
Tue, Jan 13 - Wed, Jan 21
Delta Logo
5:54 pm - 11:42 pm
ABE
-
STL
6h 48m1 stop
Delta Logo
6:00 am - 12:06 pm
STL
-
ABE
5h 06m1 stop
$314Delta
Fri, Apr 3 - Tue, Apr 7
Delta Logo
2:00 pm - 7:27 pm
ABE
-
STL
6h 27m1 stop
Delta Logo
6:00 am - 12:05 pm
STL
-
ABE
5h 05m1 stop
$348Delta
Sat, Jan 10 - Sun, Jan 11
Delta Logo
5:59 pm - 11:39 pm
ABE
-
STL
6h 40m1 stop
Delta Logo
6:00 am - 12:05 pm
STL
-
ABE
5h 05m1 stop
$373Delta
Tue, Jan 13 - Wed, Jan 14
Delta Logo
6:28 am - 11:02 am
ABE
-
STL
5h 34m1 stop
Delta Logo
6:00 am - 12:05 pm
STL
-
ABE
5h 05m1 stop
$378Delta
Tue, Feb 17 - Thu, Feb 26
United Airlines Logo
4:57 pm - 10:58 pm
ABE
-
STL
7h 01m1 stop
United Airlines Logo
8:05 am - 4:22 pm
STL
-
ABE
7h 17m1 stop
$389United Airlines
Wed, Feb 4 - Sun, Feb 8
Delta Logo
5:40 pm - 11:38 pm
ABE
-
STL
6h 58m1 stop
Delta Logo
4:00 pm - 10:56 pm
STL
-
ABE
5h 56m1 stop
$399Delta
Fri, Apr 17 - Mon, Apr 27
Multiple Airlines Logo
1:58 pm - 10:56 am
ABE
-
STL
21h 58m1 stop
Multiple Airlines Logo
5:11 pm - 2:59 pm
STL
-
ABE
20h 48m1 stop
$414Multiple Airlines
Mon, Jan 5 - Sat, Jan 10
Multiple Airlines Logo
1:58 pm - 10:56 am
ABE
-
STL
21h 58m1 stop
Multiple Airlines Logo
7:43 pm - 2:59 pm
STL
-
ABE
18h 16m2 stops
$424Multiple Airlines
Mon, Jan 5 - Sat, Jan 10

United Airlines flights from Allentown to St. Louis

Our best United Airlines deals on Allentown to St. Louis flight tickets
United Airlines
Feb 4
ABE4:57 pmAllentown-Bethlehem
7h 01m
1 stop
STL10:58 pmLambert-St Louis
Feb 8
STL8:05 amLambert-St Louis
7h 17m
1 stop
ABE4:22 pmAllentown-Bethlehem
$389
Find similar
United Airlines
Dec 21
ABE5:07 pmAllentown-Bethlehem
6h 36m
1 stop
STL10:43 pmLambert-St Louis
Dec 30
STL9:55 amLambert-St Louis
5h 35m
1 stop
ABE4:30 pmAllentown-Bethlehem
$449
Find similar
United Airlines
Dec 20
ABE6:17 amAllentown-Bethlehem
7h 10m
1 stop
STL12:27 pmLambert-St Louis
Dec 30
STL9:55 amLambert-St Louis
5h 35m
1 stop
ABE4:30 pmAllentown-Bethlehem
$484
Find similar

American Airlines flights from Allentown to St. Louis

Our best American Airlines deals on Allentown to St. Louis flight tickets
American Airlines
Feb 17
ABE12:45 pmAllentown-Bethlehem
10h 24m
2 stops
STL10:09 pmLambert-St Louis
Feb 26
STL6:58 pmLambert-St Louis
4h 32m
1 stop
ABE12:30 amAllentown-Bethlehem
$434
Find similar
American Airlines
Jan 5
ABE5:15 pmAllentown-Bethlehem
7h 40m
1 stop
STL11:55 pmLambert-St Louis
Jan 9
STL6:52 amLambert-St Louis
4h 40m
1 stop
ABE12:32 pmAllentown-Bethlehem
$479
Find similar
American Airlines
Jan 5
ABE5:15 pmAllentown-Bethlehem
7h 40m
1 stop
STL11:55 pmLambert-St Louis
Jan 9
STL6:52 amLambert-St Louis
4h 40m
1 stop
ABE12:32 pmAllentown-Bethlehem
$570
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 December 16, 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 1/13

5:59 pm-11:39 pm

1 stop6h 40m

Lambert-St Louis

Tue 1/20

6:00 am-12:05 pm

1 stop5h 05m

$243

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 1/13

5:59 pm-11:39 pm

1 stop6h 40m

Lambert-St Louis

Wed 1/21

6:00 am-12:05 pm

1 stop5h 05m

$289

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 4/3

5:54 pm-11:42 pm

1 stop6h 48m

Lambert-St Louis

Tue 4/7

6:00 am-12:06 pm

1 stop5h 06m

$314

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 1/10

2:00 pm-7:27 pm

1 stop6h 27m

Lambert-St Louis

Sun 1/11

6:00 am-12:05 pm

1 stop5h 05m

$348

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 1/13

5:59 pm-11:39 pm

1 stop6h 40m

Lambert-St Louis

Wed 1/14

6:00 am-12:05 pm

1 stop5h 05m

$373

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 2/17

6:28 am-11:02 am

1 stop5h 34m

Lambert-St Louis

Thu 2/26

6:00 am-12:05 pm

1 stop5h 05m

$378

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Wed 2/4

4:57 pm-10:58 pm

1 stop7h 01m

Lambert-St Louis

Sun 2/8

8:05 am-4:22 pm

1 stop7h 17m

$389

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 4/17

5:40 pm-11:38 pm

1 stop6h 58m

Lambert-St Louis

Mon 4/27

4:00 pm-10:56 pm

1 stop5h 56m

$399

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Mon 1/5

1:58 pm-10:56 am

1 stop21h 58m

Lambert-St Louis

Sat 1/10

5:11 pm-2:59 pm

1 stop20h 48m

$414

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Mon 1/5

1:58 pm-10:56 am

1 stop21h 58m

Lambert-St Louis

Sat 1/10

7:43 pm-2:59 pm

2 stops18h 16m

$424

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, June 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 $278. The month of September 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 Wednesday when prices can be found for as low as $310. 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 Sunday because tickets tend to average around $441. 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 afternoon is the least expensive time of day to depart. momondo users have found prices as low as $342 when looking at flights departing in the afternoon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $368 per ticket.

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

Fastest flight time

5h 34m

Direct flights

None
The fastest flight from Allentown to St. Louis takes 5h 34m
There are no direct flights from Allentown to St. Louis. There are no popular flight routes from Allentown to St. Louis.
Search flight deals

  • 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 5h 34m.

  • 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
11,049 reviews
Search American Airlines flights
DeltaPriceFrom $248Free CancellationRating
7.9
8,008 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
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Clayton
Festus
Glencoe
Farmington
Eureka
Edwardsville
Litchfield
Shrewsbury

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.

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