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$68+ Cheap flights from St. Louis to Pittsburgh (STL - PIT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PIT
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Pittsburgh are usually found in May or August, booked 46 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from St. Louis to Pittsburgh

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Pittsburgh (PIT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 14, 2025.

Round-trip from

$159
(American Airlines)

One-way from

$68
(United Airlines)

Popular in

September

Cheapest in

May

Average price

$444

Good round-trip deal

$248 or less
From Lambert-St Louis to Pittsburgh
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One-way flight from Lambert-St Louis to Pittsburgh
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Pittsburgh.
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Find flight deals from St. Louis to Pittsburgh

Cheapest flights from St. Louis to Pittsburgh
Explore the most affordable flight options available from St. Louis to Pittsburgh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2025.

This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/95:00 amSTL - PIT
1 stop4h 02mUnited Airlines
Sat 10/117:00 pmPIT - STL
1 stop4h 35mUnited Airlines
Deal found 9/12$167
This American Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:16 amSTL - PIT
1 stop8h 18mAmerican Airlines
Sat 10/117:17 amPIT - STL
1 stop9h 47mAmerican Airlines
Deal found 9/12$183
This American Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/185:20 amSTL - PIT
1 stop6h 35mAmerican Airlines
Mon 10/206:09 amPIT - STL
1 stop8h 35mAmerican Airlines
Deal found 9/12$190
This American Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/19:58 amSTL - PIT
1 stop10h 41mAmerican Airlines
Tue 11/48:04 amPIT - STL
1 stop6h 09mAmerican Airlines
Deal found 9/12$191
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/31:30 pmSTL - PIT
1 stop4h 27mDelta
Thu 11/611:39 amPIT - STL
1 stop5h 31mDelta
Deal found 9/13$197
This Southwest deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:00 amSTL - PIT
1 stop8h 00mSouthwest
Tue 11/43:35 pmPIT - STL
Nonstop1h 50mSouthwest
Deal found 9/12$199
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:30 amSTL - PIT
1 stop5h 39mUnited Airlines
Sun 11/96:00 amPIT - STL
1 stop5h 41mUnited Airlines
Deal found 9/13$205
This Southwest deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:40 pmSTL - PIT
Nonstop1h 35mSouthwest
Sat 10/111:30 pmPIT - STL
Nonstop1h 45mSouthwest
Deal found 9/12$207
This Southwest deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1812:35 pmSTL - PIT
Nonstop1h 35mSouthwest
Mon 10/207:10 amPIT - STL
1 stop5h 35mSouthwest
Deal found 9/12$216
This American Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:00 amSTL - PIT
1 stop8h 33mAmerican Airlines
Sun 11/98:15 amPIT - STL
1 stop8h 57mAmerican Airlines
Deal found 9/12$219

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Pittsburgh that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 14, 2025.
Use the filters below to find and compare flights from St. Louis to Pittsburgh that are best for you.

Fly from

St. Louis

Fly to

Pittsburgh

Route

Depart

Return

Price

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 10/9

5:00 am-10:02 am

1 stop4h 02m

Pittsburgh

Sat 10/11

7:00 pm-10:35 pm

1 stop4h 35m

$167

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 10/16

7:16 am-4:34 pm

1 stop8h 18m

Pittsburgh

Tue 10/21

7:17 am-1:44 pm

1 stop7h 27m

$183

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 11/1

9:58 am-9:39 pm

1 stop10h 41m

Pittsburgh

Tue 11/4

8:04 am-1:13 pm

1 stop6h 09m

$191

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Mon 11/3

1:30 pm-6:57 pm

1 stop4h 27m

Pittsburgh

Thu 11/6

11:39 am-4:10 pm

1 stop5h 31m

$197

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 11/1

7:00 am-4:00 pm

1 stop8h 00m

Pittsburgh

Tue 11/4

3:35 pm-4:25 pm

Nonstop1h 50m

$199

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 10/7

6:40 pm-9:15 pm

Nonstop1h 35m

Pittsburgh

Sat 10/11

1:30 pm-2:15 pm

Nonstop1h 45m

$207

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 10/24

6:52 pm-12:32 am

1 stop4h 40m

Pittsburgh

Sat 10/25

6:00 am-9:15 am

1 stop4h 15m

$216

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 10/18

12:35 pm-3:10 pm

Nonstop1h 35m

Pittsburgh

Mon 10/20

7:10 am-11:45 am

1 stop5h 35m

$216

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 12/5

3:19 pm-9:00 pm

1 stop4h 41m

$68

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 12/6

3:13 pm-9:00 pm

1 stop4h 47m

$68

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 17 results
1
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Best time to book a flight from St. Louis to Pittsburgh

Have a flexible travel schedule? Discover the best time to fly to Pittsburgh from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Pittsburgh

How far ahead should I book a flight from St. Louis to Pittsburgh?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Pittsburgh. Price data was last updated on September 12, 2025.

The best time to book flights from St. Louis to Pittsburgh is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Pittsburgh?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Pittsburgh (average of $262). Flying from St. Louis to Pittsburgh in November is currently the most expensive (average of $333). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to PIT?

Find hourly flight availability from St. Louis to Pittsburgh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 14, 2025.

It’s typically best to fly out from St. Louis to Pittsburgh in the afternoon. Doing so could potentially save you 40% on the flight price compared to flying in the evening, which is usually more expensive.

Reviews of airlines servicing Pittsburgh

Get insights into the airlines that provide service to Pittsburgh. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pittsburgh. Reviews last updated September 14, 2025.
Read through reviews of airlines operating flights from St. Louis to Pittsburgh, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,245 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,245 reviews
Southwest
8.0
Very good
4,245 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,956 reviews
Southwest
8.0
Very good
4,245 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,931 reviews
Southwest
8.0
Very good
4,245 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,245 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Pittsburgh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from St. Louis to Pittsburgh?

    If you wish to fly to Pittsburgh from St. Louis, then you need to book flights from Lambert-St Louis to Pittsburgh. There is 1 flight from Lambert-St Louis (STL) to Pittsburgh (PIT) per day to choose from. Flights to Pittsburgh from Lambert-St Louis are available from 4 different airlines, which means you should have some options if you want to compare airfare deals. 1h 35m is how long a nonstop flight from St. Louis to Pittsburgh typically takes.

  • How long is the flight from St. Louis to Pittsburgh?

    There are many flights that can get you from St. Louis to Pittsburgh in 4h 02m. Fly via United Airlines, American Airlines, or Delta to get the fastest option. Airlines will cover a distance of 552 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from St. Louis to Pittsburgh round-trip?

    Currently priced at $252, Delta will fly you from St. Louis to Pittsburgh and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and American Airlines - these airlines can fly you to your destination from $253 and $258, respectively. These flights start at 30% lower than the current average price 3 months from now.

  • What are the cheapest flights from St. Louis to Pittsburgh?

    The cheapest flight price from St. Louis to Pittsburgh is $241. On average you can expect to pay $477. The most popular route, (Lambert-St Louis - Pittsburgh), can usually be booked for $151.

  • Can I find deals for flights from St. Louis to Pittsburgh that include hotel bookings?

    Yes. In addition to deals on St. Louis to Pittsburgh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Pittsburgh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Pittsburgh.

  • Can I find deals for business class flights from St. Louis to Pittsburgh?

    Yes. Cheapflights offers flight deals from St. Louis to Pittsburgh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Pittsburgh?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Pittsburgh (average of $262). Flying from St. Louis to Pittsburgh in November is currently the most expensive (average of $333). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Pittsburgh?

Book flights to Pittsburgh if you plan to visit one of these locations
Mars
Steubenville
Monroeville
Washington
Wexford
Belle Vernon

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Alternative routes for St. Louis to Pittsburgh

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from St. Louis to Pittsburgh

Discover the top 4 airlines that operate flights from St. Louis to Pittsburgh. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$252Average$348FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$253Average$368FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$258Average$680FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$368FlexibilityNo cancel feeOn-time71%

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