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Cheap flights from Allentown to St. Louis from $156

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 5/14. 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.
Multiple Airlines Logo
6:20 am - 11:57 pm
ABE
-
STL
18h 37m
1 stop
Multiple Airlines Logo
4:19 pm - 9:29 am
STL
-
ABE
16h 10m
1 stop
$250Multiple Airlines
Fri, Jun 5 - Mon, Jun 8
Multiple Airlines Logo
6:00 am - 11:57 pm
ABE
-
STL
18h 57m
1 stop
Multiple Airlines Logo
4:19 pm - 7:57 pm
STL
-
ABE
26h 38m
1 stop
$258Multiple Airlines
Thu, May 28 - Thu, Jun 4
Delta Logo
6:30 am - 12:53 pm
ABE
-
STL
7h 23m
1 stop
Delta Logo
6:00 am - 12:08 pm
STL
-
ABE
5h 08m
1 stop
$277Delta
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
4:39 pm - 8:55 am
ABE
-
STL
17h 16m
2 stops
Multiple Airlines Logo
4:19 pm - 9:29 am
STL
-
ABE
16h 10m
1 stop
$284Multiple Airlines
Fri, Jun 5 - Mon, Jun 8
Multiple Airlines Logo
6:00 am - 11:57 pm
ABE
-
STL
18h 57m
1 stop
Multiple Airlines Logo
6:33 pm - 7:57 pm
STL
-
ABE
24h 24m
2 stops
$285Multiple Airlines
Thu, May 28 - Thu, Jun 4
United Airlines Logo
6:15 am - 12:13 pm
ABE
-
STL
6h 58m
1 stop
United Airlines Logo
6:00 am - 1:42 pm
STL
-
ABE
6h 42m
1 stop
$309United Airlines
Sun, Aug 30 - Sun, Sep 6
Delta Logo
6:15 pm - 11:59 pm
ABE
-
STL
6h 44m
1 stop
Delta Logo
10:16 am - 5:25 pm
STL
-
ABE
6h 09m
1 stop
$310Delta
Tue, May 26 - Sat, Jul 18
Delta Logo
6:10 pm - 10:18 pm
ABE
-
STL
5h 08m
1 stop
Delta Logo
6:00 am - 12:27 pm
STL
-
ABE
5h 27m
1 stop
$311Delta
Mon, Jun 8 - Wed, Jun 10
Multiple Airlines Logo
12:29 pm - 6:36 pm
ABE
-
STL
7h 07m
2 stops
Multiple Airlines Logo
4:17 pm - 1:56 pm
STL
-
ABE
20h 39m
1 stop
$313Multiple Airlines
Sun, Jun 7 - Wed, Jun 10
Delta Logo
1:00 pm - 6:02 pm
ABE
-
STL
6h 02m
1 stop
Delta Logo
6:00 am - 12:08 pm
STL
-
ABE
5h 08m
1 stop
$323Delta
Sat, Sep 5 - Sat, Sep 12

American Airlines flights from Allentown to St. Louis

Our best American Airlines deals on Allentown to St. Louis flight tickets
American Airlines
May 29
ABE5:46 pmAllentown-Bethlehem
6h 58m
1 stop
STL11:44 pmLambert-St Louis
Jun 1
STL6:12 pmLambert-St Louis
5h 09m
1 stop
ABE12:21 amAllentown-Bethlehem
$364
American Airlines
May 26
ABE5:46 pmAllentown-Bethlehem
6h 58m
1 stop
STL11:44 pmLambert-St Louis
Jul 14
STL6:12 pmLambert-St Louis
5h 11m
1 stop
ABE12:23 amAllentown-Bethlehem
$397
American Airlines
May 13
ABE12:00 pmAllentown-Bethlehem
8h 33m
2 stops
STL7:33 pmLambert-St Louis
May 20
STL6:54 pmLambert-St Louis
4h 28m
1 stop
ABE12:22 amAllentown-Bethlehem
$787

Delta flights from Allentown to St. Louis

Our best Delta deals on Allentown to St. Louis flight tickets
Delta
Sep 15
ABE6:30 amAllentown-Bethlehem
7h 23m
1 stop
STL12:53 pmLambert-St Louis
Sep 22
STL6:00 amLambert-St Louis
5h 08m
1 stop
ABE12:08 pmAllentown-Bethlehem
$277
Delta
May 26
ABE6:15 pmAllentown-Bethlehem
6h 44m
1 stop
STL11:59 pmLambert-St Louis
Jul 18
STL10:16 amLambert-St Louis
6h 09m
1 stop
ABE5:25 pmAllentown-Bethlehem
$310
Delta
Jun 8
ABE6:10 pmAllentown-Bethlehem
5h 08m
1 stop
STL10:18 pmLambert-St Louis
Jun 10
STL6:00 amLambert-St Louis
5h 27m
1 stop
ABE12:27 pmAllentown-Bethlehem
$311

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 May 1, 2026.
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

Cheapest round-trip

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 6/5

6:20 am-11:57 pm

1 stop18h 37m

Lambert-St Louis

Mon 6/8

4:19 pm-9:29 am

1 stop16h 10m

$250

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 5/28

6:00 am-11:57 pm

1 stop18h 57m

Lambert-St Louis

Thu 6/4

4:19 pm-7:57 pm

1 stop26h 38m

$258

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 9/15

6:30 am-12:53 pm

1 stop7h 23m

Lambert-St Louis

Tue 9/22

6:00 am-12:08 pm

1 stop5h 08m

$277

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Fri 6/5

4:39 pm-8:55 am

2 stops17h 16m

Lambert-St Louis

Mon 6/8

4:19 pm-9:29 am

1 stop16h 10m

$284

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Thu 5/28

6:00 am-11:57 pm

1 stop18h 57m

Lambert-St Louis

Thu 6/4

6:33 pm-7:57 pm

2 stops24h 24m

$285

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sun 8/30

6:15 am-12:13 pm

1 stop6h 58m

Lambert-St Louis

Sun 9/6

6:00 am-1:42 pm

1 stop6h 42m

$309

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Tue 5/26

6:15 pm-11:59 pm

1 stop6h 44m

Lambert-St Louis

Sat 7/18

10:16 am-5:25 pm

1 stop6h 09m

$310
Quickest round-trip

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Mon 6/8

6:10 pm-10:18 pm

1 stop5h 08m

Lambert-St Louis

Wed 6/10

6:00 am-12:27 pm

1 stop5h 27m

$311

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sun 6/7

12:29 pm-6:36 pm

2 stops7h 07m

Lambert-St Louis

Wed 6/10

4:17 pm-1:56 pm

1 stop20h 39m

$313

AllentownSt. Louis

ABE - STL

ABESTL

Allentown-Bethlehem

Sat 9/5

1:00 pm-6:02 pm

1 stop6h 02m

Lambert-St Louis

Sat 9/12

6:00 am-12:08 pm

1 stop5h 08m

$323

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 typical price of a round-trip flight between Allentown and St. Louis?

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 $282. The month of July is another great option to travel to St. Louis, with average flight prices from Allentown averaging around $303.

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

6h 02m

Direct flights

None
The fastest flight from Allentown to St. Louis takes 6h 02m
There are no direct flights from Allentown to St. Louis. There are no popular flight routes from Allentown to St. Louis.
Search flight deals

Frequently asked questions about flying from Allentown to St. Louis

  • 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 6h 02m.

  • 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
7.1
11,684 reviews
Search American Airlines flights
DeltaPriceFrom $269Free CancellationRating
7.9
8,464 reviews
Search Delta flights
United AirlinesPriceFrom $312Free CancellationRating
7.4
9,675 reviews
Search United Airlines 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
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
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.

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