£323 Cheap Flights from St. Louis (STL) to Pittsburgh (PIT)

View £323 flight on Wed, 20 May 2026Opens in a new window

Flight 1

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at £323 for one-way flights and £1,171 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,171 Return, found 3 days ago
£1,171
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,171 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,245 Return, found 3 days ago
£1,245
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,245 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,246 Return, found 3 days ago
£1,246
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,246 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,275 Return, found 3 days ago
£1,275
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,275 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,323 Return, found 3 days ago
£1,323
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,323 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,370 Return, found 3 days ago
£1,370
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,370 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,396 Return, found 3 days ago
£1,396
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,396 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,426 Return, found 3 days ago
£1,426
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,426 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,470 Return, found 3 days ago
£1,470
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,470 found 3 days ago
Alaska Airlines
Sat, 25 Jul - Mon, 27 Jul
STL
St. Louis
PIT
Pittsburgh
£1,493 Return, found 3 days ago
£1,493
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 25 Jul from St. Louis to Pittsburgh, returning Mon, 27 Jul, priced at £1,493 found 3 days ago

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 £1,171. 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.

Frequently asked questions

What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
September is typically the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.), with average return fares of approximately £416. This is about 15% lower than the average price throughout the year. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) include February and December.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
Enter STL to PIT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) will differ from traveller to traveller. If you like to fly early, WN offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. WN offers the most daily flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) for a good balance of price and availability is typically September or December. Based on booking data from the past year, you can expect average return flight prices around £416 during these months. While we don't have specific popularity data for these months, these lower prices often mean you can find good deals and convenient flight times.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
There are approximately 2 nonstop flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Pittsburgh, PA (PIT-Pittsburgh Intl.) (PIT). For even more choice, look at flights that include layovers. You'll find around 79 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and LaGuardia (LGA).
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The earliest flight from Lambert-St. Louis Intl. (STL) to Pittsburgh Intl. (PIT) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in November. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Pittsburgh, PA (PIT-Pittsburgh Intl.) (PIT) on a Friday, with around 60 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United Airlines. Friday offers notably more flight options compared to other days of the week.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) are in the early morning, from 6am to 9am. About 31% of passengers prefer this time. Many major carriers, including American Airlines, Southwest Airlines and United Airlines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day, arriving in Pittsburgh with plenty of time for business or leisure activities.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
Flying nonstop from STL to PIT takes around 1 hour 30 minutes, with the route covering approximately 551 miles. Flights with a layover typically take 4 hours 20 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
Select the "Business class" and "First class" filters when looking for STL to PIT flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Pittsburgh from Lambert-St. Louis Intl. (STL)?
From Lambert-St. Louis Intl. (STL), you can fly directly into Pittsburgh Intl. (PIT) to reach Pittsburgh. Some flights may connect through major hubs like O'Hare Intl. (ORD), Charlotte-Douglas Intl. (CLT), Hartsfield-Jackson Atlanta Intl. (ATL) before reaching Pittsburgh. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Pittsburgh Intl.
Return price
£1,170
Distance
881 km
Average flight time
3 hours 23 mins

Explore a world of travel with Expedia

*Available to Expedia members.