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Cheap flights from St. Louis to Philadelphia from R2 861

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Find the cheapest flights from St. Louis to Philadelphia

Cheap return flights

These are some of the best return flight deals from St. Louis to Philadelphia that have been recently found on momondo from popular airlines, departing in the coming months.
STL-PHL
2h 10mdirect
PHL-STL
2h 31mdirect
American Airlines
Find Deal
STL-PHL
2h 10mdirect
PHL-STL
2h 30mdirect
Qatar Airways
Find Deal
STL-PHL
2h 10mdirect
PHL-STL
2h 42mdirect
Aer Lingus
Find Deal
STL-PHL
2h 10mdirect
PHL-STL
2h 25mdirect
Southwest
Find Deal
STL-PHL
2h 18mdirect
PHL-STL
2h 43mdirect
Iberia
Find Deal
STL-PHL
2h 10mdirect
PHL-STL
2h 42mdirect
British Airways
Find Deal

See travel insights to Philadelphia from

How to get the cheapest flight ticket from St. Louis to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Philadelphia?

In general, June is the cheapest month to fly from St. Louis to Philadelphia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R3 228. If you are unable to visit Philadelphia during the month of June, then departing from St. Louis during the month July is also very affordable. Most momondo users find prices during this month for around R3 686.

What is the cheapest day to depart on your flight to Philadelphia?

According to our data, Monday is the cheapest day to fly to Philadelphia from St. Louis. The lowest ticket price found for a Monday departure recently was R0. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from St. Louis to Philadelphia on a Wednesday will generally be more expensive and average around R3 114. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Philadelphia?

Our most recent data shows that the best time of day to fly to Philadelphia is in the morning. Flights from St. Louis to Philadelphia during this time can be as low as R0. Flights to Philadelphia are more costly in the evening, with an average ticket price of R3 114. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to Philadelphia flight route?

Fly from Lambert-St Louis to Philadelphia for the best Lambert-St Louis - Philadelphia flight prices

How far in advance should I book a flight to Philadelphia?

You are more likely to see cheaper flights to Philadelphia from St. Louis when booking 22 weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around R5 875 when searching 22 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from St. Louis for as low as R3 301 on momondo.

What cabin class options are available on Lambert-St Louis to Philadelphia flights?

There are 1 cabin classes available to choose from on Lambert-St Louis to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Philadelphia flight prices changed over time?

As of February 2025, prices for St. Louis to Philadelphia flights are approximately 21% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Philadelphia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Philadelphia according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to Philadelphia (STL to PHL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Philadelphia

Direct flights

None
There are no direct flights from St. Louis to Philadelphia. There are no popular flight routes from St. Louis to Philadelphia.

  • How far is Lambert-St Louis to Philadelphia by plane?

    The distance between Lambert-St Louis and Philadelphia is about 1300,6 km.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Philadelphia Airport?

    Prices for flights from Lambert-St Louis Airport to Philadelphia Airport are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Philadelphia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Philadelphia Airport.

  • What documentation or ID do you need to fly to Philadelphia Airport?

    The necessary travel and health documents for your Philadelphia Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Philadelphia?


Travelling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood Crest
Cape May
Newark

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Philadelphia?

Finding the right flight to Philadelphia from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Philadelphia quick and easy, saving you time and money.

Can I find flights from St. Louis to Philadelphia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Philadelphia from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Philadelphia?

Once all potential St. Louis to Philadelphia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Philadelphia right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Philadelphia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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Fly your favourite airline to Philadelphia

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