$73 Cheap Flights from St. Louis (STL) to Pittsburgh (PIT)

View $73 flight on Sat, Jan 17, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $73 for one-way flights and $160 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 13 - Mon, Nov 17
STL
St. Louis
PIT
Pittsburgh
$160 Roundtrip, found 2 hours ago
$160
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Nov 13 from St. Louis to Pittsburgh, returning Mon, Nov 17, priced at $160 found 2 hours ago
Frontier Airlines
Thu, Nov 13 - Fri, Nov 14
STL
St. Louis
PIT
Pittsburgh
$163 Roundtrip, found 7 hours ago
$163
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Nov 13 from St. Louis to Pittsburgh, returning Fri, Nov 14, priced at $163 found 7 hours ago
Delta
Wed, Dec 3 - Sun, Dec 7
STL
St. Louis
PIT
Pittsburgh
$174 Roundtrip, found 2 days ago
$174
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Dec 3 from St. Louis to Pittsburgh, returning Sun, Dec 7, priced at $174 found 2 days ago
United
Tue, Jan 27 - Fri, Jan 30
STL
St. Louis
PIT
Pittsburgh
$177 Roundtrip, found 16 hours ago
$177
Roundtrip
found 16 hours ago
Select United flight, departing Tue, Jan 27 from St. Louis to Pittsburgh, returning Fri, Jan 30, priced at $177 found 16 hours ago
Delta
Tue, Jan 27 - Fri, Jan 30
STL
St. Louis
PIT
Pittsburgh
$178 Roundtrip, found 16 hours ago
$178
Roundtrip
found 16 hours ago
Select Delta flight, departing Tue, Jan 27 from St. Louis to Pittsburgh, returning Fri, Jan 30, priced at $178 found 16 hours ago
American Airlines
Mon, Dec 8 - Wed, Dec 10
STL
St. Louis
PIT
Pittsburgh
$179 Roundtrip, found 1 day ago
$179
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Dec 8 from St. Louis to Pittsburgh, returning Wed, Dec 10, priced at $179 found 1 day ago
Frontier Airlines
Thu, Nov 6 - Mon, Nov 10
STL
St. Louis
PIT
Pittsburgh
$180 Roundtrip, found 2 days ago
$180
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Nov 6 from St. Louis to Pittsburgh, returning Mon, Nov 10, priced at $180 found 2 days ago
Delta
Mon, Dec 8 - Wed, Dec 10
STL
St. Louis
PIT
Pittsburgh
$182 Roundtrip, found 1 day ago
$182
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Dec 8 from St. Louis to Pittsburgh, returning Wed, Dec 10, priced at $182 found 1 day ago
Frontier Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
PIT
Pittsburgh
$183 Roundtrip, just found
$183
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Nov 13 from St. Louis to Pittsburgh, returning Sun, Nov 16, priced at $183 just found
Southwest Airlines
Sat, Jan 17 - Tue, Jan 20
STL
St. Louis
PIT
Pittsburgh
$205 Roundtrip, found 5 days ago
$205
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Sat, Jan 17 from St. Louis to Pittsburgh, returning Tue, Jan 20, priced at $205 found 5 days ago

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

October is typically the cheapest month to fly

From $137 - $959 per traveler.

Alternative airports near Pittsburgh

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Pittsburgh Intl. PIT. Cheapest option available. Average driving time to city center is 23 minutes. Flights from $332
PIT
Pittsburgh Intl.
Cheapest
Average driving time to city center23 min
Flights from $332

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT) cost?
Secure a cheap one-way flight from $73 or cheap return flight from $160 from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
Flying in November is a great way to save, as it's the cheapest month for flights between STL and PIT. You'll usually find the lowest fares during off-peak months.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
Take a direct flight with Southwest Airlines and go straight from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT).
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest STL to PIT flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
On average, you can pick from 6 direct weekly flights from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT). For more flexibility, consider flights with layovers. Just enter your details on Expedia and then filter your search to show one stop or more.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
More people fly between STL and PIT at 6 PM than at any other point in the day. Prefer a quieter experience? Pick a flight outside the busiest times and there's a chance you'll save on your ticket as well.
What day of the week has the most flights from STL to PIT?
If you depart on a Friday, you'll get the greatest range of choices for flights from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT).
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
The earliest flight leaving from Lambert-St. Louis Intl. Airport (STL) is at around 8:20AM UTC-6. Catch this flight and you'll land at Pittsburgh Intl. Airport (PIT) at approximately 10:55AM UTC-5. The total travel time is 1h 35m.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
The average flight time from STL to PIT is 1 hour and 35 minutes, covering a total distance of 550 mi.
What airline has the least delays from STL to PIT?
Consider booking with Southwest Airlines if you'd like to fly straight from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT) without any interruptions. This airline has the strongest track record for punctuality, with an on-time performance of 87%. Want to be notified if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT) route, travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Pittsburgh from Lambert-St. Louis Intl. Airport (STL)?
If you're traveling on a direct flight from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh, Pittsburgh Intl. Airport (PIT) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT) last-minute?
Booking your flight from STL to PIT just before your trip is generally more expensive. However, if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a STL to PIT flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to PIT flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place takes the hassle out of travel planning. Simply secure your flights and select from our extensive range of stays, then tailor your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Pittsburgh Intl. Airport (PIT)?
Typically, you can cancel or reschedule your STL to PIT flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you'd like more details, visit our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Pittsburgh Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$160
Distance
551 mi
Average flight time
2 hours 36 mins

Book with confidence

St. Louis to Pittsburgh Flights

The cheapest times to fly from St. Louis to Pittsburgh

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Pittsburgh are during the month of November. You can find some of the cheapest flights from St. Louis to Pittsburgh with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Pittsburgh

Sunday is one of the best days to book for cheap flights from St. Louis to Pittsburgh: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Pittsburgh

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Pittsburgh in 2025. You can also book with separate airlines for your outbound and return journeys, from $73 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Pittsburgh flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Pittsburgh airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Pittsburgh Flights

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*Available to One Key members.