$82 Cheap flight deals from St. Louis (STL) to Allentown (ABE)

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This Weekend's Flight Deals from St. Louis to Allentown

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Nov 7 - Sun, Nov 8
STL
Lambert-St. Louis Intl.
PHL
Philadelphia Intl.
$328 Roundtrip, found 4 days ago
$328
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Nov 7 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sun, Nov 8, priced at $328 found 4 days ago
Fri, Nov 6 - Sun, Nov 8
STL
Lambert-St. Louis Intl.
TTN
Mercer
$404 Roundtrip, found 3 days ago
$404
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Fri, Nov 6 from Lambert-St. Louis Intl. to Mercer, returning Sun, Nov 8, priced at $404 found 3 days ago

Airfares from $82 One Way, $169 Round Trip from St. Louis to Allentown

Prices starting at $169 for return flights and $82 for one-way flights to Allentown were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 9 - Wed, Dec 16
STL
St. Louis
PHL
Philadelphia
$169 Roundtrip, found 3 days ago
$169
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, Dec 9 from St. Louis to Philadelphia, returning Wed, Dec 16, priced at $169 found 3 days ago
Fri, Dec 4 - Sat, Dec 12
STL
St. Louis
PHL
Philadelphia
$178 Roundtrip, found 4 days ago
$178
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Dec 4 from St. Louis to Philadelphia, returning Sat, Dec 12, priced at $178 found 4 days ago
Wed, Dec 9 - Sat, Dec 12
STL
St. Louis
PHL
Philadelphia
$180 Roundtrip, found 2 days ago
$180
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Dec 9 from St. Louis to Philadelphia, returning Sat, Dec 12, priced at $180 found 2 days ago
Fri, Dec 4 - Sat, Dec 12
STL
St. Louis
PHL
Philadelphia
$193 Roundtrip, found 4 days ago
$193
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Dec 4 from St. Louis to Philadelphia, returning Sat, Dec 12, priced at $193 found 4 days ago
Wed, Dec 9 - Sat, Dec 12
STL
St. Louis
TTN
Trenton
$200 Roundtrip, found 2 days ago
$200
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Dec 9 from St. Louis to Trenton, returning Sat, Dec 12, priced at $200 found 2 days ago

Allentown economy flight packages

Price found within the past 48 hours. Click for updated prices.
Sofitel Philadelphia at Rittenhouse Square
4.5-star property

Sofitel Philadelphia at Rittenhouse Square

9.2/10 Wonderful! (2,839 reviews)

Dec 2 - Dec 8

6 night stay

St. Louis (STL) to Philadelphia (PHL)

Southwest Airlines • Coach

Philadelphia (PHL) to St. Louis (STL)

Frontier Airlines • Coach
Price was $1,184, price is now $832 per person
$832
per person
found 1 day ago
Food great, room spacious. Hotel close to many stores and attraction

Reviewed on Nov 1, 2026

Hyatt Centric Rittenhouse Square Philadelphia
4.0-star property

Hyatt Centric Rittenhouse Square Philadelphia

9.4/10 Exceptional! (1,790 reviews)

Dec 2 - Dec 8

6 night stay

St. Louis (STL) to Philadelphia (PHL)

Southwest Airlines • Coach

Philadelphia (PHL) to St. Louis (STL)

Frontier Airlines • Coach
Price was $1,562, price is now $1,057 per person
$1,057
per person
found 1 day ago

Fairfield Inn & Suites by Marriott Philadelphia Downtown/Center City
3.0-star property

Fairfield Inn & Suites by Marriott Philadelphia Downtown/Center City

8.6/10 Excellent! (1,562 reviews)

Dec 2 - Dec 8

6 night stay

St. Louis (STL) to Philadelphia (PHL)

Southwest Airlines • Coach

Philadelphia (PHL) to St. Louis (STL)

Frontier Airlines • Coach
Price was $1,361, price is now $928 per person
$928
per person
found 1 day ago
These are dormitory sized rooms with no frills and limited storage. The shower was nice but there was almost zero water pressure in the sink. The lighting plan needs improvement. The bedside lamps are unusable without using the wall sconce which creates a choice between a desk lamp ( dim lighting) or full brightness. The morning coffee service delivered up a beverage that was lukewarm making it an unused perk. The bright spot is the staff who were all wonderful. This is a budget choice in a good location for Philadelphia.

Reviewed on Nov 1, 2026

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More About Flying To Allentown from St. Louis

Route Information for Flights from St. Louis to Allentown

Origin Airport IATA Code
STL
Destination Airport IATA Code
ABE
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

St. Louis to Allentown

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Frequently asked questions

Are there non-stop flights from St. Louis to Allentown?
Yes, you'll be happy to hear that you can jet straight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to PHL. Direct flights are offered by American Airlines and Southwest Airlines.
What is the shortest flight from St. Louis to Allentown?
The trip from St. Louis to Allentown can be as quick as 2 hours and 50 minutes. With an easy flight time like this, why not round up some friends and take off on an impulsive getaway?
What airlines fly from St. Louis to Allentown most frequently?
The carriers that fly frequently between Lambert Field and PHL include American Airlines (AA). This well-known option offers 86 flights on the route each month. Also explore the rewarding deals from Southwest Airlines (WN). Offering 30 flights every month between St. Louis and Allentown, they make the journey just as good as the destination.
What is the cheapest day of the week to fly?
Consider flying out early in the week to save on your airfare. Orbitz data from 2021 shows that Monday is the cheapest day to depart, followed by Tuesday. Saturday showed the highest average ticket prices likely because many travelers prefer to start their vacation on a weekend.
What is the cheapest month to fly?
We won't keep you guessing, according to Orbitz data from 2021, the cheapest month to fly is February. Perfect for those who need a weekend getaway, or just a break from it all in the shortest month of the year. Be aware that the most expensive time to fly is during the height of summer in July, and in the holiday month of December.*According to flight demand on Orbitz.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.