STL - ABE

$232 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 5/16. 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
$319
Typical prices: $311-$546
Delta
Sat 5/16Sun 5/17
STL - ABE • 1 stop
Cheapest one-way
Multiple Airlines
Tue 12/16
STL - ABE • multi-stop
Top airlines
Delta
Cheapest • from $319 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
September
Cheapest • 24% price drop
August
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, May 16 - Sun, May 17
Delta Logo
6:00 am - 12:10 pm
STL
-
ABE
5h 10m1 stop
Delta Logo
6:30 am - 10:45 am
ABE
-
STL
5h 15m1 stop
$319Delta
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
8:05 am - 4:22 pm
STL
-
ABE
7h 17m1 stop
United Airlines Logo
4:57 pm - 10:58 pm
ABE
-
STL
7h 01m1 stop
$339United Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
9:57 am - 4:22 pm
STL
-
ABE
5h 25m1 stop
United Airlines Logo
4:57 pm - 10:58 pm
ABE
-
STL
7h 01m1 stop
$344United Airlines
Sun, Feb 1 - Thu, Feb 5
Delta Logo
6:00 am - 11:59 am
STL
-
ABE
4h 59m1 stop
Delta Logo
12:48 pm - 5:50 pm
ABE
-
STL
6h 02m1 stop
$433Delta
Sun, Feb 1 - Thu, Feb 5
Delta Logo
6:00 am - 11:59 am
STL
-
ABE
4h 59m1 stop
Delta Logo
5:59 pm - 11:37 pm
ABE
-
STL
6h 38m1 stop
$463Delta
Mon, Jan 12 - Fri, Jan 16
American Airlines Logo
3:54 pm - 10:26 pm
STL
-
ABE
5h 32m1 stop
American Airlines Logo
1:02 pm - 6:34 pm
ABE
-
STL
6h 32m1 stop
$471American Airlines
Wed, Dec 31 - Sun, Jan 4
American Airlines Logo
5:00 am - 11:20 am
STL
-
ABE
5h 20m1 stop
American Airlines Logo
5:15 pm - 11:55 pm
ABE
-
STL
7h 40m1 stop
$489American Airlines
Thu, Feb 5 - Sun, Feb 8
United Airlines Logo
11:20 am - 10:41 am
STL
-
ABE
22h 21m1 stop
United Airlines Logo
6:15 am - 11:02 am
ABE
-
STL
5h 47m1 stop
$492United Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
9:57 am - 4:22 pm
STL
-
ABE
5h 25m1 stop
United Airlines Logo
4:57 pm - 9:22 am
ABE
-
STL
17h 25m2 stops
$515United Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
9:57 am - 4:22 pm
STL
-
ABE
5h 25m1 stop
United Airlines Logo
4:57 pm - 9:22 am
ABE
-
STL
17h 25m2 stops
$535United 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’s the cheapest day of the week to fly from St. Louis to Allentown?

The average price of all round-trip flights from St. Louis to Allentown clicked on KAYAK for each day over the last 12 months.

For St. Louis to Allentown, Saturday is the cheapest day to fly on average and Monday is the most expensive. Flying from Allentown back to St. Louis, the best deals are generally found on Tuesday, with Monday being the most expensive.

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 February and May, where the average cost of round-trip tickets is $478 and $457 respectively.

Good to know

Low seasonFebruary
Cheapest flight$319
Best time to beat the crowds but there is an average 36% increase in price.
Most popular time to fly with an average 9% 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 $319 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 $477 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 8010 reviews
7.9Entertainment
8.1Boarding
7.3Food
7.9Comfort
8.5Crew
Airline reviews

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

6.0 GoodJeff, Dec 2025
JFK - MIA
Read more Delta reviews

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

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.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

Internet was a bit expensive and did not work ask that week otherwise a good flight

The flight had a delay that made me being in a real rush to take the second flight. The delay was almost for 2 hours. They moved us from gate to gate in 4 times. Once I arrived to Philadelphia, I got to run thorough all the airport, as the train was already closed by that time. So I got sick with asthma for all the running I had to do. And I was the last one to board, when it was almost closed. So irresponsable with the people

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Overall, a good experience. The food, however, was subpar. The breakfast was a joke.

I was late from Jacksonville, FL but the limited interaction I had with the Philly crew was great.

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

Information on your arrival and departure airports