€128 Cheap Flights St. Louis to Philadelphia (STL-PHL)

View €128 flight on Sat, 17 Jan 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Philadelphia Intl. Airport (PHL)

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Cheap flights from St. Louis to Philadelphia (STL-PHL)

Prices were available within the past 7 days and start at €128 for one-way flights and €255 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€255 Return, found 4 days ago
€255
Return
found 4 days ago
Select American Airlines flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €255 found 4 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€255 Return, found 4 days ago
€255
Return
found 4 days ago
Select American Airlines flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €255 found 4 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€263 Return, found 4 days ago
€263
Return
found 4 days ago
Select American Airlines flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €263 found 4 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€264 Return, found 4 days ago
€264
Return
found 4 days ago
Select American Airlines flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €264 found 4 days ago
Delta
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€271 Return, found 4 days ago
€271
Return
found 4 days ago
Select Delta flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €271 found 4 days ago
American Airlines
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€293 Return, found 4 days ago
€293
Return
found 4 days ago
Select American Airlines flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €293 found 4 days ago
Delta
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€299 Return, found 4 days ago
€299
Return
found 4 days ago
Select Delta flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €299 found 4 days ago
Delta
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€301 Return, found 4 days ago
€301
Return
found 4 days ago
Select Delta flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €301 found 4 days ago
Delta
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€308 Return, found 4 days ago
€308
Return
found 4 days ago
Select Delta flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €308 found 4 days ago
United
Sat, 17 Jan - Sun, 18 Jan
STL
St. Louis
PHL
Philadelphia
€330 Return, found 4 days ago
€330
Return
found 4 days ago
Select United flight, departing Sat, 17 Jan from St. Louis to Philadelphia, returning Sun, 18 Jan, priced at €330 found 4 days ago

Find the cheapest month to fly from St. Louis (STL) to Philadelphia (PHL)

January is typically the cheapest month to fly

From €103 - €357 per traveller.
St. Louis to Philadelphia route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Philadelphia Intl.
Return price
€254
Distance
1298 km
Average flight time
3 hours 9 mins

Perfect flights from St. Louis to Philadelphia

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from St. Louis to Philadelphia. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Lambert-St. Louis Intl. to Philadelphia Intl. ticket options cater to your travel preferences, with incredible one-way fares from €128 and roundtrip prices from €255. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Philadelphia Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Philadelphia.

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to Philadelphia Intl. Airport (PHL)?
Round-trip journeys between STL and Philadelphia Airport start from €255. This price is based on fares advertised within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from STL to Philadelphia Airport?
Every air carrier has its own terms and conditions. If you do decide to cancel, follow the simple instructions on our Customer Service Portal.
How do I find cheap flights from STL to PHL that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert Field to PHL flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from STL to PHL?
Settle into your seat, pick an in-flight TV show and 2 hours and 6 minutes will whiz by in a jiffy. That's how long it takes to get to PHL (PHL) from STL (STL).
How far is the flight from STL to PHL?
The distance from Lambert-St. Louis Intl. Airport (STL) (STL) to Philadelphia Intl. Airport (PHL) (PHL) is only 1,300 kilometres. You'll be walking down the air bridge and collecting your suitcase from the carousel in no time.
Which airlines fly direct from St. Louis Lambert International Airport to PHL?
With 56 flights a month from Lambert Field to PHL, Southwest Airlines (WN) is a top choice. Another carrier servicing this route is American Airlines (AA). You'll have 30 flights each month to select from.
Are St. Louis Lambert International Airport to PHL flight tickets cheaper when they're purchased at the last minute?
It is possible to find an amazing last-minute deal from STL to PHL, but it can also be hit-or-miss. As many airlines advertise prices up to a year in advance, it's worth keeping an eye on fares early and being ready to book when you see a bargain. Expedia compares air carrier prices and updates flight deals frequently, so you can rest assured you're always seeing the latest offers.

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