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Cheap flights from Philadelphia to St. Louis

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Find the cheapest flights from Philadelphia to St. Louis

Cheap return flights

These are some of the best return flight deals from Philadelphia to St. Louis that have been recently found on momondo from popular airlines, departing in the coming months.
PHL-STL
2h 38mdirect
STL-PHL
2h 10mdirect
American Airlines
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PHL-STL
2h 30mdirect
STL-PHL
2h 10mdirect
Qatar Airways
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PHL-STL
2h 42mdirect
STL-PHL
2h 10mdirect
Aer Lingus
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PHL-STL
2h 25mdirect
STL-PHL
2h 10mdirect
Southwest
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PHL-STL
2h 43mdirect
STL-PHL
2h 18mdirect
Iberia
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PHL-STL
2h 42mdirect
STL-PHL
2h 10mdirect
British Airways
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See travel insights to St. Louis from

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

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 St. Louis?

In general, July is the cheapest month to fly from Philadelphia to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R3 712. If you aren’t able to travel to St. Louis during the month of July, then flying in August is also cheap. Prices for this month can be found on momondo for an average of R3 786.

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

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

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Philadelphia when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around R6 159 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Philadelphia for as low as R3 878 on momondo.

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

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

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

As of February 2025, prices for Philadelphia to St. Louis flights are approximately 5% more expensive when compared to flights at the same time last year.

When to book flights from Philadelphia to St. Louis

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

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

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

Direct flights

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

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

    Lambert-St Louis is 1300,6 km away from Philadelphia.

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

    Prices for flights from Philadelphia Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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


Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Philadelphia to St. Louis for you.

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

All flight searches from Philadelphia to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Philadelphia to St. Louis 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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