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

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Flights from St. Louis (SUS) to Pittsburgh (PIT)
Origin airport
Spirit of St. Louis
Destination airport
Pittsburgh Intl.
Distance
567 mi

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 . 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 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.

 

Frequently asked questions

How much does a flight from Spirit of St. Louis Airport (SUS) to Pittsburgh Intl. Airport (PIT) cost?
Discover the latest flight deals from SUS to PIT by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SUS to PIT?
The cheapest flights from SUS to PIT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Spirit of St. Louis Airport (SUS) to Pittsburgh Intl. Airport (PIT)?
You can’t fly nonstop from St. Louis, MO (SUS-Spirit of St. Louis) to Pittsburgh Intl. Airport (PIT). However, you can seamlessly travel to Pittsburgh without any layovers by departing from Lambert-St. Louis Intl. Airport (STL).
What is the cheapest airline that flies from SUS to PIT?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SUS to PIT. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Spirit of St. Louis Airport (SUS) to Pittsburgh Intl. Airport (PIT)?
Nonstop flights from Spirit of St. Louis Airport (SUS) to Pittsburgh Intl. Airport (PIT) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from SUS to PIT?
Usually you’ll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Spirit of St. Louis Airport (SUS) to Pittsburgh Intl. Airport (PIT)?
To touch down at Pittsburgh Intl. Airport (PIT) on schedule, book a flight that leaves from Spirit of St. Louis Airport (SUS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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.
Is it cheaper to buy a plane ticket from Spirit of St. Louis Airport (SUS) to Pittsburgh Intl. Airport (PIT) last-minute?
Booking your ticket from SUS to PIT shortly before your getaway is usually more expensive. However, if there’s some wiggle room with your departure dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a SUS to PIT flight and hotel package?
Compared with arranging hotels and flights separately, booking a SUS to PIT flight and hotel package with Expedia could result in significant savings. What’s more, having everything in one easy place will take the hassle out of planning your trip. Simply pick your flights and select from our extensive range of stays, then tailor your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Spirit of St. Louis Airport (SUS) to Pittsburgh Intl. Airport (PIT)?
If you reserved your SUS to PIT flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

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*Available to One Key members.