STL - ABE

$349 Find Cheap Flights from St. Louis to Allentown

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Allentown departing on 2/10. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Allentown

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Allentown, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Allentown, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$349
Overall average: $478
United Airlines
Tue 2/10Sat 2/14
STL - ABE • 1 stop
Cheapest one-way
Multiple Airlines
Tue 1/27
STL - ABE • multi-stop
Top airlines
United Airlines
Cheapest • from $279 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
March
Cheapest • 34% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
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

Tue, Feb 10 - Sat, Feb 14
United Airlines Logo
9:57 am - 4:22 pm
STL
-
ABE
5h 25m
1 stop
United Airlines Logo
2:55 pm - 9:05 pm
ABE
-
STL
7h 10m
1 stop
$349United Airlines
Wed, Jul 15 - Mon, Jul 20
Delta Logo
3:42 pm - 10:56 pm
STL
-
ABE
6h 14m
1 stop
Delta Logo
6:30 am - 12:53 pm
ABE
-
STL
7h 23m
1 stop
$376Delta
Wed, Feb 18 - Sat, Feb 21
United Airlines Logo
7:41 am - 10:01 am
STL
-
ABE
25h 20m
1 stop
United Airlines Logo
5:23 pm - 9:05 pm
ABE
-
STL
4h 42m
1 stop
$389United Airlines
Wed, Jul 15 - Mon, Jul 20
Delta Logo
3:42 pm - 10:56 pm
STL
-
ABE
6h 14m
1 stop
Delta Logo
6:30 am - 12:53 pm
ABE
-
STL
7h 23m
1 stop
$401Delta
Wed, Jul 15 - Mon, Jul 20
Delta Logo
6:00 am - 12:08 pm
STL
-
ABE
5h 08m
1 stop
Delta Logo
6:30 am - 12:53 pm
ABE
-
STL
7h 23m
1 stop
$402Delta
Wed, Feb 18 - Sat, Feb 21
United Airlines Logo
11:25 am - 10:01 am
STL
-
ABE
21h 36m
1 stop
United Airlines Logo
2:55 pm - 9:05 pm
ABE
-
STL
7h 10m
1 stop
$419United Airlines
Tue, Mar 10 - Fri, Mar 13
American Airlines Logo
5:51 pm - 11:31 pm
STL
-
ABE
4h 40m
1 stop
American Airlines Logo
12:00 pm - 6:07 pm
ABE
-
STL
7h 07m
1 stop
$421American Airlines
Sat, Feb 28 - Sat, Feb 28
Delta Logo
6:00 am - 12:05 pm
STL
-
ABE
5h 05m
1 stop
Delta Logo
5:58 pm - 11:36 pm
ABE
-
STL
6h 38m
1 stop
$546Delta
Wed, Jul 15 - Mon, Jul 20
American Airlines Logo
9:17 am - 6:40 pm
STL
-
ABE
8h 23m
2 stops
American Airlines Logo
5:18 pm - 11:42 pm
ABE
-
STL
7h 24m
1 stop
$758American Airlines
Wed, Feb 18 - Sat, Feb 21
United Airlines Logo
6:00 am - 4:48 pm
STL
-
ABE
9h 48m
2 stops
United Airlines Logo
2:55 pm - 9:05 pm
ABE
-
STL
7h 10m
1 stop
$788United 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.

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 March, where tickets cost $228 (return) on average. On the other hand, the most expensive months are February and May, where the average cost of round-trip tickets is $478 and $477 respectively.

Good to know

Low seasonFebruary
Cheapest flight$349
Best time to beat the crowds but there is an average 38% increase in price.
Most popular time to fly with an average 10% increase in price.
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 3 days, the lowest price for a flight from St. Louis to Allentown was $279 for a round-trip ticket.

  • 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 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $303 and an overall rating of 7.2.

  • 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.
7.9
DeltaOverall score based on 8118 reviews
8.1Boarding
7.2Food
8.5Crew
7.9Comfort
7.8Entertainment
Airline reviews

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

10.0 ExcellentSenthil Kumar, Jan 2026
PDX - ATL
Read more Delta reviews

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

There was no wifi available on this flight. And there were no screens, no onboard entertainment, no entertainment options at all. It was like travelling in the 1990s again, except without even a main screen for options. Seats, as usual, were tight and uncomfortable.

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

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.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

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

The seat cushions were very worn so they were extremely uncomfortable.

Crew were all friendly and helpful. It was a short flight so just a beverage service with a cookie. After we were boarded the plane took about 45 minutes to leave the gate but it was New Year’s Eve so not shocking there was some delay. Overall good experience and very grateful.

Flight was on time is the only good thing. Person loading the plane called 1-6 to board at the same time, made it chaotic. Plane was too small for even putting backpacks in overhead. Seat for normal sized people were too small. The WIFI didn't work. When we landed had to wait because not enough ground crew.

the trip to madrid was uncomfortable with my legs touching the seat in front of me

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

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

Information on your arrival and departure airports