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$29 Cheap Frontier Airlines flights St. Louis (STL) to Philadelphia (PHL)
Prices were available within the past 7 days and start at $29 for one-way flights and $58 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
![Frontier Airlines](http://images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif)
![Frontier Airlines](http://images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/F9.gif)
Origin airport | Lambert-St. Louis Intl. |
Destination airport | Philadelphia Intl. |
Airlines serving | Alaska Airlines, American Airlines, Delta, Frontier Airlines, Spirit Airlines, Sun Country Airlines, United |
Roundtrip price | $58 |
Distance | 811 mi |
Flights from St. Louis (STL) to Philadelphia (PHL) with Frontier Airlines
❓ How much is a flight ticket from St. Louis (STL) - Philadelphia (PHL) with Frontier Airlines?
✔️ Prices were available within the past 7 days and start at $29 for one-way flights and $58 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
❓ Which month is the cheapest flight ticket for St. Louis (STL) to Philadelphia (PHL) with Frontier Airlines?
✔️ The airfares published on Expedia.com over the past 7 days saw the lowest prices for one-way departures in August and round-trip departures in August.
❓ How can I find cheap Frontier Airlines tickets from St. Louis STL to Philadelphia PHL?
✔️ Use the interactive calendar available on Expedia to see the cheapest Frontier Airlines (St. Louis STL - Philadelphia PHL) ticket prices during the weeks surrounding your travel dates. Compare flight prices for similar timeframes and adjust departure and return dates to get the cheapest fare possible. The lowest-priced days are highlighted in green.
While it’s impossible to guarantee when to find the lowest prices, our data currently suggests that August seems to be the cheapest month to take roundtrips and August seems to have the lowest one-way prices. Plane tickets for flight routes with one or more stops can sometimes be cheaper.
❓ When is the best time to buy flights from St. Louis to Philadelphia?
✔️ Three weeks out can be the best time to book flights with various airlines on diverse routes according to ARC & Expedia Group historical data. The data also suggests that if book on a Sunday, you could possibly save up to 20% on fares*.
❓ What is the cheapest day to fly from STL to PHL?
✔️ ARC & Expedia Group historical data suggests that travelers can save on diverse routes when starting their journey on a Thursday for international flights and on a Friday for domestic flights*. The cheapest day of the week to fly changes based on seasonal demand and route popularity. We recommend using the ‘Show flexible dates’ feature at the top of your search.
❓ Can I change or cancel my Frontier Airlines flight from St. Louis to Philadelphia?
✔️ Airlines have different policies and fees for changes or cancellations. It’s important to review the ‘rules + restrictions’ section in your itinerary. We recommend filtering for ‘No change fees’ to see flexible plane tickets. Some airlines charge steep fees, while others are more flexible. Basic Economy or Light Fare tickets are generally non-refundable, but most airlines allow free cancellations or changes within 24 hours after booking. Find out more about changing or canceling your flight reservation by navigating to ‘My Trips’ and selecting ‘Change My Flight.’
*Data specialists from both ARC and Expedia Group analyzed ARC’s global flight data to distill actionable information to help people save money on travel. While it’s impossible to guarantee when to find the lowest prices, after examining the variables, we were able to observe trends.Best day of the week to book and travel recommendation is based on average round-trip ticket prices for January through early October, for both 2019 and 2020, sourced from ARC’s global airline sales database.
- Trending Frontier Airlines Flights
- Trending Routes
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- Expedia's Latest Trends
Most Popular Frontier Airlines Routes from St. Louis
- Frontier Airlines STL to MCO
- Frontier Airlines STL to LAX
- Frontier Airlines STL to LAS
- Frontier Airlines STL to PDX
- Frontier Airlines STL to SFO
- Frontier Airlines STL to DEN
- Frontier Airlines STL to SEA
- Frontier Airlines STL to CUN
- Frontier Airlines STL to MIA
- Frontier Airlines STL to SLC
- Frontier Airlines STL to PUJ
Most Popular Frontier Airlines Routes from Philadelphia
- New York to San Juan (JFK - SJU)
- Orlando to San Juan (MCO - SJU)
- New York to Punta Cana (JFK - PUJ)
- San Juan to Orlando (SJU - MCO)
- Philadelphia to Orlando (PHL - MCO)
- Dallas to Los Angeles (DFW - LAX)
- Trenton to Orlando (TTN - MCO)
- Los Angeles to Las Vegas (LAX - LAS)
- New York to Punta Cana (JFK - PUJ)
- Chicago to Las Vegas (ORD - LAS)
Popular Domestic Routes in Philadelphia Intl.
- Los Angeles to Las Vegas (LAX - LAS)
- New York to Orlando (LGA - MCO)
- New York to Orlando (LGA - MCO)
- Trenton to Orlando (TTN - MCO)
- Newark to San Juan (EWR - SJU)
- Dallas to New York (DFW - LGA)
- Atlanta to Las Vegas (ATL - LAS)
- Trenton to Orlando (TTN - MCO)
- Chicago to Las Vegas (ORD - LAS)
- New York to San Juan (JFK - SJU)
Nearby Airports
- Spirit of St. Louis Airport (SUS)
- Abraham Lincoln Capital Airport (SPI)
- Quincy Regional-Baldwin Field Airport (UIN)
- Columbia Regional Airport (COU)
- Williamson County Regional Airport (MWA)
- Decatur Airport (DEC)
- Cape Girardeau Municipal Airport (CGI)
- St. Robert Regional Airport (TBN)
- Cairo Regional Airport (CIR)
- Roy Otten Memorial Airfield Airport (VRS)