$154+ Cheap flights from St. Louis to Allentown (STL - ABE)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ABE
Aug 26 — Sep 21
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from St. Louis to AllentownExplore the most affordable flight options available from St. Louis to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.
Explore the most affordable flight options available from St. Louis to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/239:00 am
STL
- ABE
1 stop7h 12m
Delta
Thu 11/266:30 am
ABE
- STL
1 stop5h 18m
Delta
Deal found 7/24![Delta logo]()
$317
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:39 pm
STL
- ABE
1 stop5h 44m
Delta
Sun 9/66:16 am
ABE
- STL
1 stop6h 40m
Delta
Deal found 7/24![Delta logo]()
$330
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:00 am
STL
- ABE
1 stop4h 28m
Delta
Mon 8/176:08 pm
ABE
- STL
1 stop6h 50m
Delta
Deal found 7/22![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
STL
- ABE
1 stop5h 28m
Delta
Tue 8/181:10 pm
ABE
- STL
1 stop6h 17m
Delta
Deal found 7/26![Delta logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:35 am
STL
- ABE
2 stops10h 53m
Multiple Airlines
Sun 10/186:00 am
ABE
- STL
1 stop14h 39m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:39 pm
STL
- ABE
1 stop5h 44m
Delta
Mon 8/246:04 pm
ABE
- STL
2 stops17h 19m
Delta
Deal found 7/23![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:40 pm
STL
- ABE
1 stop5h 06m
Delta
Thu 11/266:30 am
ABE
- STL
2 stops17h 48m
Delta
Deal found 7/24![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:25 pm
STL
- ABE
1 stop6h 40m
United Airlines
Tue 10/275:32 pm
ABE
- STL
1 stop4h 41m
United Airlines
Deal found 7/22![United Airlines logo]()
$399
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:58 pm
STL
- ABE
1 stop18h 40m
Multiple Airlines
Sun 9/69:55 pm
ABE
- STL
2 stops16h 26m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$406
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/239:00 am
STL
- ABE
1 stop7h 12m
Delta
Wed 11/251:00 pm
ABE
- STL
1 stop6h 01m
Delta
Deal found 7/24![Delta logo]()
$408
Best flights from St. Louis to AllentownDiscover carefully curated flight deals from St. Louis to Allentown that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
Discover carefully curated flight deals from St. Louis to Allentown that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:05 am
STL
- ABE
1 stop6h 14m
Delta
Sun 10/46:04 pm
ABE
- STL
1 stop6h 38m
Delta
Deal found 7/22![Delta logo]()
$333
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:59 pm
STL
- ABE
1 stop7h 01m
United Airlines
Tue 8/185:36 pm
ABE
- STL
2 stops17h 34m
United Airlines
Deal found 7/26![United Airlines logo]()
$567
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2410:47 am
STL
- ABE
1 stop5h 29m
Delta
Mon 10/266:03 pm
ABE
- STL
1 stop6h 51m
Delta
Deal found 7/25![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1510:31 am
STL
- ABE
1 stop5h 52m
Delta
Tue 8/181:10 pm
ABE
- STL
1 stop6h 17m
Delta
Deal found 7/25![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:25 pm
STL
- ABE
1 stop7h 04m
Delta
Sun 10/186:00 pm
ABE
- STL
1 stop6h 48m
Delta
Deal found 7/23![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:00 am
STL
- ABE
1 stop5h 28m
Delta
Tue 9/86:08 pm
ABE
- STL
1 stop6h 34m
Delta
Deal found 7/23![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/256:00 am
STL
- ABE
1 stop5h 04m
Delta
Wed 11/255:40 pm
ABE
- STL
1 stop15h 32m
Delta
Deal found 7/24![Delta logo]()
$449
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/184:40 pm
STL
- ABE
1 stop5h 06m
Delta
Fri 12/251:00 pm
ABE
- STL
1 stop6h 01m
Delta
Deal found 7/24![Delta logo]()
$469
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1911:51 am
STL
- ABE
1 stop4h 21m
Delta
Thu 12/241:00 pm
ABE
- STL
1 stop6h 01m
Delta
Deal found 7/24![Delta logo]()
$470
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:00 am
STL
- ABE
1 stop5h 23m
Delta
Wed 8/126:08 pm
ABE
- STL
1 stop6h 13m
Delta
Deal found 7/22![Delta logo]()
$487
Last-minute flights from St. Louis to AllentownDiscover last-minute flight deals from St. Louis to Allentown. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Allentown. Data last updated July 27, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/251:18 pm
STL
- ABE
1 stop6h 49m
United Airlines
Sat 8/15:41 pm
ABE
- STL
1 stop6h 48m
United Airlines
Deal found 7/24![United Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3110:51 am
STL
- ABE
1 stop5h 34m
Delta
Mon 8/36:08 pm
ABE
- STL
1 stop6h 50m
Delta
Deal found 7/23![Delta logo]()
$427
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/11:18 pm
STL
- ABE
1 stop6h 49m
United Airlines
Sat 8/85:41 pm
ABE
- STL
1 stop4h 45m
United Airlines
Deal found 7/22![United Airlines logo]()
$508
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:00 am
STL
- ABE
1 stop5h 23m
Delta
Wed 8/126:08 pm
ABE
- STL
1 stop6h 13m
Delta
Deal found 7/22![Delta logo]()
$487
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
STL
- ABE
1 stop5h 28m
Delta
Tue 8/181:10 pm
ABE
- STL
1 stop6h 17m
Delta
Deal found 7/22![Delta logo]()
$333
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:00 am
STL
- ABE
1 stop4h 28m
Delta
Mon 8/176:08 pm
ABE
- STL
1 stop6h 50m
Delta
Deal found 7/23![Delta logo]()
$343
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 am
STL
- ABE
1 stop5h 28m
Delta
Sat 8/226:16 am
ABE
- STL
2 stops16h 47m
Delta
Deal found 7/23![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:00 am
STL
- ABE
1 stop5h 23m
Delta
Tue 8/256:08 pm
ABE
- STL
1 stop18h 38m
Delta
Deal found 7/23![Delta logo]()
$434
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:50 am
STL
- ABE
1 stop7h 06m
United Airlines
Thu 8/275:36 pm
ABE
- STL
1 stop6h 23m
United Airlines
Deal found 7/23![United Airlines logo]()
$510
One-way flights from St. Louis to AllentownSearch for one-way flight options from St. Louis to Allentown. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
Search for one-way flight options from St. Louis to Allentown. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:44 pm
STL
- ABE
1 stop5h 39m
Delta
Deal found 7/22![Delta logo]()
$154
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:00 am
STL
- ABE
1 stop4h 28m
Delta
Deal found 7/22![Delta logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:35 am
STL
- ABE
2 stops34h 53m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$193
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:00 am
STL
- ABE
1 stop5h 23m
Delta
Deal found 7/22![Delta logo]()
$248
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1111:31 am
STL
- ABE
1 stop5h 16m
American Airlines
Deal found 7/24![American Airlines logo]()
$256
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/38:50 am
STL
- ABE
1 stop7h 06m
United Airlines
Deal found 7/22![United Airlines logo]()
$375
This American Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:00 am
STL
- ABE
2 stops9h 27m
American Airlines
Deal found 7/22![American Airlines logo]()
$461
This American Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:00 am
STL
- ABE
2 stops9h 27m
American Airlines
Deal found 7/22![American Airlines logo]()
$578
This American Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:00 am
STL
- ABE
2 stops9h 27m
American Airlines
Deal found 7/22![American Airlines logo]()
$600
Find flight deals from St. Louis to Allentown
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Allentown (ABE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $317 (Delta) |
One-way from | $154 (Delta) |
Popular in | April |
Cheapest in | September |
Average price | $342 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Allentown 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, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
Use the filters below to find and compare flights from St. Louis to Allentown that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Fri 10/2
10:05 am-5:19 pm
1 stop6h 14m
Allentown-Bethlehem
Sun 10/4
6:04 pm-11:42 pm
1 stop6h 38m
$333
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Sat 10/24
10:47 am-5:16 pm
1 stop5h 29m
Allentown-Bethlehem
Mon 10/26
6:03 pm-11:54 pm
1 stop6h 51m
$333
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Sat 8/15
10:31 am-5:23 pm
1 stop5h 52m
Allentown-Bethlehem
Tue 8/18
1:10 pm-6:27 pm
1 stop6h 17m
$333
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Fri 10/16
2:25 pm-10:29 pm
1 stop7h 04m
Allentown-Bethlehem
Sun 10/18
6:00 pm-11:48 pm
1 stop6h 48m
$333
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Thu 9/3
6:00 am-12:28 pm
1 stop5h 28m
Allentown-Bethlehem
Tue 9/8
6:08 pm-11:42 pm
1 stop6h 34m
$333
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Wed 11/25
6:00 am-12:04 pm
1 stop5h 04m
Allentown-Bethlehem
Wed 11/25
5:40 pm-8:12 am
1 stop15h 32m
$449
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Fri 12/18
4:40 pm-10:46 pm
1 stop5h 06m
Allentown-Bethlehem
Fri 12/25
1:00 pm-6:01 pm
1 stop6h 01m
$469
Quickest round-trip
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Sat 12/19
11:51 am-5:12 pm
1 stop4h 21m
Allentown-Bethlehem
Thu 12/24
1:00 pm-6:01 pm
1 stop6h 01m
$470
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Tue 8/11
11:00 am-5:23 pm
1 stop5h 23m
Allentown-Bethlehem
Wed 8/12
6:08 pm-11:21 pm
1 stop6h 13m
$487
St. LouisAllentown
STL - ABE
STLABE
Lambert-St Louis
Sat 8/15
12:59 pm-9:00 pm
1 stop7h 01m
Allentown-Bethlehem
Tue 8/18
5:36 pm-10:10 am
2 stops17h 34m
$567
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Allentown
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Allentown in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Allentown flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Allentown flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Allentown flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Allentown flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Allentown flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Allentown
Have a flexible travel schedule? Discover the best time to fly to Allentown from St. Louis with our price prediction graph.
STL-ABE
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Allentown
What is the cheapest month to book a flight from St. Louis to Allentown?
Currently, September is the cheapest month in which you can book a flight from St. Louis to Allentown (average of $228). Flying from St. Louis to Allentown in April is currently the most expensive (average of $640). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from St. Louis to Allentown?
Airfare is below average for this route at the moment.
St. Louis to Allentown flights typically cost between $379 and $383 in November.The cheapest round-trip price found within the last 5 days was $317 on Delta (Nov 23-Nov 26).
Reviews of airlines servicing Allentown
Get insights into the airlines that provide service to Allentown. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Allentown. Reviews last updated July 27, 2026.
Get a feel of what it's like to fly with Delta and American Airlines from St. Louis to Allentown by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Allentown. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Top 2 airlines flying from St. Louis to Allentown
Discover the top 2 airlines that operate flights from St. Louis to Allentown. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$248 | Average$362 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$274 | Average$378 | FlexibilityNo cancel fee | On-timeN/A |