£174 Cheap Flights from St. Louis (STL) to Pittsburgh (PIT)

View £174 flight on Tue, 4 Nov 2025Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to Pittsburgh International Airport (PIT)

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Cheap Flights from St. Louis (STL) to Pittsburgh (PIT)

Prices were available within the past 7 days and start at £174 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from St. Louis (STL) to Pittsburgh (PIT)

September is typically the cheapest month to fly

From £113 - £524 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Pittsburgh route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Pittsburgh Intl.
Distance
881 km
Average flight time
2 hours 37 mins

Compare flights from St. Louis to Pittsburgh easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from St. Louis to Pittsburgh. Operating between them 1 flights per day, 20 airlines cover the route. And Southwest Airlines fly direct, getting you to Pittsburgh Intl. in just 1hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Lambert-St. Louis Intl. to Pittsburgh Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Lambert-St. Louis Intl. (STL) to Pittsburgh Intl. (PIT)

The easiest way to view the best deals on flights from St. Louis to Pittsburgh today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Lambert-St. Louis Intl. to Pittsburgh Intl. start at just and range up to .  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near St. Louis and Pittsburgh
  • booking your flight during , the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your St. Louis to Pittsburgh flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to Pittsburgh Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to PIT?
Round-trip journeys between St. Louis Lambert International Airport and PIT start from . This figure is based on fares available 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 PIT?
We understand that life can throw the odd curveball, so we've made it as simple as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from St. Louis Lambert International Airport to Pittsburgh Airport 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-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from STL to Pittsburgh Intl. Airport (PIT)?
You won't need a lengthy novel for this flight — it's only 890 kilometres from St. Louis to Pittsburgh. Find your seat, order a drink and you'll be touching down in next to no time.
Which airlines fly direct from St. Louis Lambert International Airport to Pittsburgh Airport?
A popular option with many frequent travellers, Southwest Airlines (WN) offers 30 flights every month from St. Louis Lambert International Airport to PIT. Pick the one that fits with your travel schedule and book your seat today.
Are Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT) flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes find a bargain, with some super cheap fares from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Airport appearing a few weeks prior to the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals regularly — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines advertise prices that far in advance.

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