STL - ABE

$161 Find Cheap Flights from St. Louis to Allentown - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Allentown departing on 8/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$315
Overall average: $228
Delta
Fri 9/18Mon 9/21
STL - ABE • 1 stop
Cheapest one-way
$161
Multiple Airlines
Wed 8/12
STL - ABE • 2 stops
Top airlines
Cheapest • from $315 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Allentown. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $145 (round-trip)
Shortest trip • 5h 05m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 45% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Allentown!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Allentown (STL-ABE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Allentown that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Allentown

Fri, Sep 18 - Mon, Sep 21
Delta Logo
4:59 pm - 10:16 pm
STL
-
ABE
4h 17m
1 stop
Delta Logo
6:04 pm - 11:42 pm
ABE
-
STL
6h 38m
1 stop
$315Delta
Fri, Sep 25 - Tue, Sep 29
Delta Logo
6:00 am - 12:15 pm
STL
-
ABE
5h 15m
1 stop
Delta Logo
6:25 am - 10:55 am
ABE
-
STL
5h 30m
1 stop
$315Delta
Thu, Nov 26 - Thu, Nov 26
Delta Logo
6:00 am - 12:04 pm
STL
-
ABE
5h 04m
1 stop
Delta Logo
5:40 pm - 11:39 pm
ABE
-
STL
6h 59m
1 stop
$317Delta
Mon, Nov 23 - Thu, Nov 26
Delta Logo
9:00 am - 5:12 pm
STL
-
ABE
7h 12m
1 stop
Delta Logo
6:30 am - 10:48 am
ABE
-
STL
5h 18m
1 stop
$317Delta
Fri, Oct 16 - Sun, Oct 18
Multiple Airlines Logo
10:35 am - 10:28 pm
STL
-
ABE
10h 53m
2 stops
Multiple Airlines Logo
6:00 am - 7:39 pm
ABE
-
STL
14h 39m
1 stop
$369Multiple Airlines
Thu, Sep 3 - Sun, Sep 6
Multiple Airlines Logo
7:58 pm - 3:38 pm
STL
-
ABE
18h 40m
1 stop
Multiple Airlines Logo
9:55 pm - 1:21 pm
ABE
-
STL
16h 26m
2 stops
$406Multiple Airlines
Wed, Nov 4 - Wed, Nov 11
United Airlines Logo
1:08 pm - 9:02 pm
STL
-
ABE
6h 54m
1 stop
United Airlines Logo
5:32 pm - 9:56 pm
ABE
-
STL
5h 24m
1 stop
$422United Airlines
Tue, Dec 22 - Thu, Dec 24
American Airlines Logo
11:31 am - 5:47 pm
STL
-
ABE
5h 16m
1 stop
American Airlines Logo
6:00 am - 12:35 pm
ABE
-
STL
7h 35m
1 stop
$437American Airlines
Mon, Dec 21 - Wed, Dec 23
American Airlines Logo
11:31 am - 5:47 pm
STL
-
ABE
5h 16m
1 stop
American Airlines Logo
6:00 am - 10:51 am
ABE
-
STL
5h 51m
1 stop
$500American Airlines
Tue, Dec 22 - Wed, Dec 23
American Airlines Logo
11:31 am - 5:47 pm
STL
-
ABE
5h 16m
1 stop
American Airlines Logo
6:00 am - 12:35 pm
ABE
-
STL
7h 35m
1 stop
$500American Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Allentown flights

Get data-powered insights and trends into flights from St. Louis to Allentown to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Allentown?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Allentown departing in September.

Flight prices are below average for this route right now.

Flights to Allentown from St. Louis usually cost between $379 and $383 in September.
The lowest price found in the past 5 days was $315 on Delta (Sep 18-Sep 21).

What is the cheapest month to fly from St. Louis to Allentown?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Allentown, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Allentown is September, where tickets cost $228 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $640 and $611 respectively.

Good to know

Low season

February

Cheapest flight

$161
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from St. Louis to Allentown

When to book flights from St. Louis to Allentown

Are your dates flexible? Find out the best times to travel from St. Louis to Allentown based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Allentown

  • What is the cheapest flight from St. Louis to Allentown?

    In the last 5 days, the lowest price for a flight from St. Louis to Allentown was $161 for a one-way ticket and $315 for a round-trip.

  • Do I need a passport to fly between St. Louis and Allentown?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from St. Louis to Allentown?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Allentown?

    SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Allentown, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Allentown, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Allentown are Delta and American Airlines. With an average price for the route of $378 and an overall rating of 7.8, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $313 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from St. Louis to Allentown?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Allentown.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Allentown?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Allentown from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Allentown?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Allentown with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and ABE can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Allentown?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Allentown from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from St. Louis to Allentown

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Allentown. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Allentown? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8482 reviews
7.8Comfort
7.8Entertainment
7.2Food
8.5Crew
8.1Boarding
Airline reviews

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

10.0 ExcellentPaula, Jun 2026
STL - ATL
Read more Delta reviews

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

My tray was broken so i had no place to work or eat except my lap. Flight attendant said I would get an email with some credit or miles, it was a complete waste of time as I could only function at about 20% of normal. I have not received anything yet.

Delayed. Hot. Passenger next to me was so large I couldn’t move.

2+hrs delay without any reason provided and a cramped flight

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Terrible. I did not like the delay without recourses to help passengers to get to their destinations. AA used to offer coupons for food and overnight accommodation, but not this time. The flight planning was terrible despite of all the current technology available; AA could have informed passengers better that the replacement flight is impossible today, instead of stringing passengers along for 6 hours before cancellation, so that passengers can make earlier alternative arrangements to get home.

It was a bus not a flight. Okay bus ride.

Everything you need to know for your flight from St. Louis to Allentown

Information on your arrival and departure airports