STL - ABE

$159 Find Cheap Flights from St. Louis to Allentown

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 4/28. 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
$318
Overall average: $303
Delta
Sat 4/18Tue 4/21
STL - ABE • 1 stop
Cheapest one-way
$159
Delta
Tue 4/28
STL - ABE • 1 stop
Top airlines
Cheapest • from $318 (round-trip)
Best reviews • 7.9 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 • 4h 36m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 26% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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

Sat, Apr 18 - Tue, Apr 21
Delta Logo
6:00 am - 12:12 pm
STL
-
ABE
5h 12m
1 stop
Delta Logo
5:59 pm - 11:36 pm
ABE
-
STL
6h 37m
1 stop
$318Delta
Tue, Mar 31 - Sat, Apr 4
Delta Logo
5:21 pm - 10:56 pm
STL
-
ABE
4h 35m
1 stop
Delta Logo
5:58 pm - 11:58 pm
ABE
-
STL
7h 00m
1 stop
$353Delta
Sat, May 23 - Sun, May 24
United Airlines Logo
6:00 am - 1:48 pm
STL
-
ABE
6h 48m
1 stop
United Airlines Logo
6:15 am - 10:34 am
ABE
-
STL
5h 19m
1 stop
$366United Airlines
Thu, May 28 - Sun, May 31
Multiple Airlines Logo
8:08 pm - 11:04 pm
STL
-
ABE
25h 56m
1 stop
Multiple Airlines Logo
12:29 pm - 6:36 pm
ABE
-
STL
7h 07m
2 stops
$389Multiple Airlines
Fri, Apr 3 - Sun, Apr 5
Delta Logo
4:21 pm - 10:52 pm
STL
-
ABE
5h 31m
1 stop
Delta Logo
6:32 am - 11:09 am
ABE
-
STL
5h 37m
1 stop
$394Delta
Sat, May 2 - Fri, May 8
United Airlines Logo
7:45 am - 1:38 pm
STL
-
ABE
4h 53m
1 stop
United Airlines Logo
2:25 pm - 9:13 pm
ABE
-
STL
7h 48m
1 stop
$395United Airlines
Thu, Apr 2 - Sun, Apr 5
American Airlines Logo
6:57 pm - 12:29 am
STL
-
ABE
4h 32m
1 stop
American Airlines Logo
6:04 am - 12:43 pm
ABE
-
STL
7h 39m
1 stop
$399American Airlines
Sun, Apr 19 - Tue, Apr 21
Delta Logo
6:00 am - 12:12 pm
STL
-
ABE
5h 12m
1 stop
Delta Logo
6:33 am - 11:56 am
ABE
-
STL
6h 23m
1 stop
$400Delta
Sat, May 2 - Fri, May 8
Multiple Airlines Logo
8:23 pm - 7:06 pm
STL
-
ABE
21h 43m
2 stops
Multiple Airlines Logo
3:25 pm - 12:21 am
ABE
-
STL
9h 56m
1 stop
$404Multiple Airlines
Thu, Apr 2 - Sun, Apr 5
American Airlines Logo
6:57 pm - 12:29 am
STL
-
ABE
4h 32m
1 stop
American Airlines Logo
6:04 am - 12:43 pm
ABE
-
STL
7h 39m
1 stop
$409American 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 September, where tickets cost $268 (return) on average. On the other hand, the most expensive months are March and May, where the average cost of round-trip tickets is $610 and $437 respectively.

Good to know

Low seasonFebruary
Cheapest flight$159
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 6% 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 $159 for a one-way ticket and $318 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 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $304 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.
7.9
DeltaOverall score based on 8296 reviews
8.1Boarding
8.5Crew
7.9Comfort
7.2Food
7.8Entertainment
Airline reviews

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

2.0 MediocreSusan, Mar 2026
JAX - ATL
Read more Delta reviews

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I didn't end up taking this flight. I got up at 4am for a flight that was supposed to board at 6am - at 5:55am you delayed the flight to 10am. The airport is under construction so I switched to a later flight as I wasn't going to sit in the airport for 4 hours. They said the delay was due to the crew needing rest from a flight coming in late the night before - if that was the case then I think you should have delayed the flight much sooner so that passengers wouldn't get up so early and get to the airport to sit and wait.

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.

I very rarely fly American and my experience today reenforces that is the correct decision. While the staff were all very courteous, our flight was first thing in the morning so there was no reason to be delayed, yet appropriate maintenance checks weren’t completed prior to our flight so we were delayed multiple times. Not a great showing, American Airlines.

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

I was on a small regional flight from Detroit to Philadelphia. When we landed the outside cruise needed to turn something off with the engine, which took quite a long time. Then, when they allowed us to get off the plane it was outside. They took their time, unloading all the luggage and waited till they unloaded all the luggage before they brought it over to us. It was 9 o’clock at night freezing cold out, and there was no proactive hustle to try to get people their luggage. It was really one of the worst experiences I think I’ve ever had with American until a manager came over. I don’t think they were going to even consider pulling the luggage over to the people that had been waiting outside for at least 10 minutes in the freezing cold.

Awful. Original flight was delayed 5 hours. Had to to take a connecting flight instead of direct. Had a 4 hour layover. I missed all of my morning meetings getting in 5 hours later than I was supposed to and had to change to take a later flight the next day to get them back in which cia time another $150.

I was trying to take 2 one and a half hour one way trips and I experienced almost 20 delays over the course of those two trips. Only a few of them were due to weather the rest was disorganization

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.

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

Information on your arrival and departure airports