CA $155 Cheap Flights from St. Louis (STL) to Pittsburgh (PIT)

View CA $155 flight on Tue, Sep. 23, 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 CA $155 for one-way flights and CA $308 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Sep. 9 - Sat, Sep. 20
STL
St. Louis
PIT
Pittsburgh
CA $308 Roundtrip, found 6 days ago
CA $308
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Sep. 9 from St. Louis to Pittsburgh, returning Sat, Sep. 20, priced at CA $308 found 6 days ago
Delta
Fri, Sep. 5 - Sat, Sep. 20
STL
St. Louis
PIT
Pittsburgh
CA $332 Roundtrip, found 6 days ago
CA $332
Roundtrip
found 6 days ago
Select Delta flight, departing Fri, Sep. 5 from St. Louis to Pittsburgh, returning Sat, Sep. 20, priced at CA $332 found 6 days ago
Delta
Mon, Aug. 25 - Mon, Sep. 8
STL
St. Louis
PIT
Pittsburgh
CA $350 Roundtrip, found 6 days ago
CA $350
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Aug. 25 from St. Louis to Pittsburgh, returning Mon, Sep. 8, priced at CA $350 found 6 days ago
Delta
Fri, Sep. 5 - Fri, Sep. 26
STL
St. Louis
PIT
Pittsburgh
CA $354 Roundtrip, found 6 days ago
CA $354
Roundtrip
found 6 days ago
Select Delta flight, departing Fri, Sep. 5 from St. Louis to Pittsburgh, returning Fri, Sep. 26, priced at CA $354 found 6 days ago
Delta
Sun, Sep. 7 - Sat, Sep. 20
STL
St. Louis
PIT
Pittsburgh
CA $364 Roundtrip, found 6 days ago
CA $364
Roundtrip
found 6 days ago
Select Delta flight, departing Sun, Sep. 7 from St. Louis to Pittsburgh, returning Sat, Sep. 20, priced at CA $364 found 6 days ago
Delta
Fri, Aug. 22 - Mon, Sep. 8
STL
St. Louis
PIT
Pittsburgh
CA $374 Roundtrip, found 6 days ago
CA $374
Roundtrip
found 6 days ago
Select Delta flight, departing Fri, Aug. 22 from St. Louis to Pittsburgh, returning Mon, Sep. 8, priced at CA $374 found 6 days ago
United
Mon, Sep. 1 - Sat, Sep. 13
STL
St. Louis
PIT
Pittsburgh
CA $380 Roundtrip, found 6 days ago
CA $380
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep. 1 from St. Louis to Pittsburgh, returning Sat, Sep. 13, priced at CA $380 found 6 days ago
Delta
Sun, Sep. 7 - Fri, Sep. 26
STL
St. Louis
PIT
Pittsburgh
CA $388 Roundtrip, found 6 days ago
CA $388
Roundtrip
found 6 days ago
Select Delta flight, departing Sun, Sep. 7 from St. Louis to Pittsburgh, returning Fri, Sep. 26, priced at CA $388 found 6 days ago
Delta
Mon, Sep. 1 - Wed, Sep. 17
STL
St. Louis
PIT
Pittsburgh
CA $394 Roundtrip, found 6 days ago
CA $394
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Sep. 1 from St. Louis to Pittsburgh, returning Wed, Sep. 17, priced at CA $394 found 6 days ago
American Airlines
Thu, Aug. 28 - Mon, Sep. 8
STL
St. Louis
PIT
Pittsburgh
CA $400 Roundtrip, found 6 days ago
CA $400
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Aug. 28 from St. Louis to Pittsburgh, returning Mon, Sep. 8, priced at CA $400 found 6 days ago
American Airlines
Sat, Aug. 16 - Mon, Sep. 1
STL
St. Louis
PIT
Pittsburgh
CA $404 Roundtrip, found 6 days ago
CA $404
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Aug. 16 from St. Louis to Pittsburgh, returning Mon, Sep. 1, priced at CA $404 found 6 days ago

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

September is typically the cheapest month to fly

From CA $208 - CA $964 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Pittsburgh (STL - PIT) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Pittsburgh Intl.
Roundtrip price
CA $308
Distance
881 km
Average flight time
2 hours 37 mins

St. Louis to Pittsburgh Flights

The easy way to book your flights from St. Louis to Pittsburgh 

With Expedia, it’s simple to find and book flights to Pittsburgh from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are Southwest Airlines nonstop flights to Pittsburgh Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Pittsburgh today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Pittsburgh Intl., PIT 

Sort your search results by price to find great deals on your flight from St. Louis to Pittsburgh—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Pittsburgh from St. Louis currently is just CA $308 rising to CA $404.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Pittsburgh  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Pittsburgh from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Pittsburgh with Expedia today.

Frequently asked questions

How much is a flight from STL to Pittsburgh Airport?
Based on fares advertised within the last 7 days on Expedia for flights departing within the next year, round-trip flights from Lambert Field to Pittsburgh Intl. Airport (PIT) start from CA $308. Book ASAP to score the best price for your trip. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Airport?
This differs between airlines, as each one has its own terms and conditions. Visit the Customer Service Portal, where you'll find easy instructions on how to cancel your flight online.
How do I find cheap flights from STL to Pittsburgh Airport that have flexible change policies?
Use our "No change fees" filter to find flexible travel options for your flight from Lambert Field to Pittsburgh Airport. This allows you to snag a great price in advance and still have the freedom to make changes without any additional fees. You'll just need to pay the difference in fare.
How many hours is the flight from STL to Pittsburgh Intl. Airport (PIT)?
There are lots of ways to make the 4 hours and 45 minutes between Lambert-St. Louis Intl. Airport (STL) and PIT go by faster. If you want to be productive, organize your camera roll or clear out all those unwanted emails. A snooze also helps pass the time!
How far is the flight from Lambert Field to Pittsburgh Airport?
You won't have time for a movie marathon on this flight — it's only 890 kilometres from St. Louis to Pittsburgh. Sit down, enjoy the in-flight service and you'll be touching down in next to no time.
Which airlines fly direct from STL to Pittsburgh Intl. Airport (PIT)?
Operating 26 flights each month, Southwest Airlines (WN) is a great choice when flying directly from STL to Pittsburgh Intl. Airport (PIT).
Are Lambert-St. Louis Intl. Airport (STL) to PIT flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes find a bargain, with some super cheap fares from Lambert-St. Louis Intl. Airport (STL) to PIT popping up 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 release prices that far in advance.

Explore a world of travel with Expedia

*Available to Expedia members.