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$86+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PIT
Jan 13 — Jan 201
Tue 1/13
Tue 1/20
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lambert-St Louis to Pittsburgh are usually found in May or January, booked 64 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap 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 December 14, 2025.

This American Airlines deal was found by Cheapflights users on 12/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:16 pmSTL - PIT
1 stop4h 02mAmerican Airlines
Sat 1/37:45 pmPIT - STL
1 stop5h 11mAmerican Airlines
Deal found 12/13$367
This American Airlines deal was found by Cheapflights users on 12/12. 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 12/312:04 pmSTL - PIT
1 stop4h 21mAmerican Airlines
Sun 1/49:45 pmPIT - STL
1 stop4h 40mAmerican Airlines
Deal found 12/12$370
This American Airlines deal was found by Cheapflights users on 12/11. 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.
Thu 12/257:00 amSTL - PIT
1 stop10h 01mAmerican Airlines
Thu 1/16:38 amPIT - STL
1 stop7h 36mAmerican Airlines
Deal found 12/11$387
This United Airlines deal was found by Cheapflights users on 12/12. 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.
Wed 12/173:13 pmSTL - PIT
1 stop4h 37mUnited Airlines
Fri 12/262:45 pmPIT - STL
1 stop5h 37mUnited Airlines
Deal found 12/12$412
This Southwest deal was found by Cheapflights users on 12/11. 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.
Wed 12/316:15 pmSTL - PIT
Nonstop1h 35mSouthwest
Mon 1/56:05 pmPIT - STL
1 stop6h 10mSouthwest
Deal found 12/11$415
This Kiwi.com deal was found by Cheapflights users on 12/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:37 pmSTL - PIT
2 stops16h 34mFrontier
Mon 1/56:02 pmPIT - STL
1 stop29h 31mFrontier
Deal found 12/12$437
This American Airlines deal was found by Cheapflights users on 12/12. 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.
Fri 12/199:28 pmSTL - PIT
1 stop4h 21mAmerican Airlines
Mon 1/56:45 pmPIT - STL
1 stop5h 59mAmerican Airlines
Deal found 12/12$447
This Delta deal was found by Cheapflights users on 12/13. 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.
Tue 12/237:02 pmSTL - PIT
1 stop4h 17mDelta
Sun 12/286:00 pmPIT - STL
1 stop3h 41mDelta
Deal found 12/13$480

Find 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 December 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$164
(Southwest)

One-way from

$86
(Kiwi.com)

Popular in

October

Cheapest in

May

Average price

$337

Good one-way deal

$393 or less
Provider with most accurate pricing for Lambert-St Louis-Pittsburgh flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Pittsburgh flights.
Search Deals
From Lambert-St Louis to Pittsburgh
Search Deals
One-way flight from Lambert-St Louis to Pittsburgh
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Pittsburgh.
Search Deals

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 December 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

Tue 1/6

1:45 pm-9:55 pm

1 stop7h 10m

Pittsburgh

Thu 1/8

6:00 pm-9:00 pm

1 stop4h 00m

$164

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 1/7

11:05 am-3:50 pm

1 stop3h 45m

Pittsburgh

Tue 1/13

6:00 am-11:41 am

1 stop6h 41m

$191

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 1/8

8:30 am-2:04 pm

1 stop4h 34m

Pittsburgh

Mon 1/12

6:40 pm-11:59 pm

1 stop6h 19m

$261

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 1/3

4:27 pm-10:59 pm

1 stop29h 32m

Pittsburgh

Sun 1/11

10:45 am-8:05 am

1 stop22h 20m

$285

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 1/9

6:15 pm-8:50 pm

Nonstop1h 35m

Pittsburgh

Sun 1/11

1:25 pm-3:55 pm

1 stop3h 30m

$369

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 1/14

8:32 pm-11:44 pm

2 stops26h 12m

$86

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Mon 1/12

5:11 pm-11:44 pm

2 stops29h 33m

$90

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 1/13

5:11 pm-4:45 pm

1 stop22h 34m

$93

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 1/8

3:43 pm-9:40 am

2 stops16h 57m

$105

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 1/16

8:32 pm-11:44 pm

2 stops26h 12m

$118

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Compare providers for flights from St. Louis to Pittsburgh

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Pittsburgh in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Pittsburgh flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Pittsburgh flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Pittsburgh flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Pittsburgh flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Pittsburgh flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 December 12, 2025.

The best time to book flights from St. Louis to Pittsburgh is 64 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, January is the cheapest month in which you can book a flight from St. Louis to Pittsburgh (average of $180). Flying from St. Louis to Pittsburgh in July is currently the most expensive (average of $328). 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 December 14, 2025.

It’s typically best to fly out from St. Louis to Pittsburgh in the afternoon. Doing so could potentially save you 42% 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 December 14, 2025.
Read through reviews of airlines operating flights from St. Louis to Pittsburgh, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,251 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,251 reviews
Southwest
7.9
Good
4,251 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,007 reviews
Southwest
7.9
Good
4,251 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,054 reviews
Southwest
7.9
Good
4,251 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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.

  • How popular is this St. Louis to Pittsburgh flight route?

    Within the past month, 1 users have taken a look at flights from Lambert-St Louis to Pittsburgh.

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

    There are many flights that can get you from St. Louis to Pittsburgh in 3h 45m. Fly via Southwest, American Airlines, or United Airlines 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 $226, American Airlines will fly you from St. Louis to Pittsburgh and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Delta - these airlines can fly you to your destination from $241 and $252, respectively. These flights start at 36% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Pittsburgh one-way?

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $125. However, be on the lookout for offers from Delta and American Airlines, as they are both options that can get you from St. Louis to Pittsburgh for a low price.

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

    The cheapest flight price from St. Louis to Pittsburgh is $197. On average you can expect to pay $608. The most popular route, (Lambert-St Louis - Pittsburgh), can usually be booked for $190.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Pittsburgh (average of $180). Flying from St. Louis to Pittsburgh in July is currently the most expensive (average of $328). 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
Washington
Monroeville
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 3 airlines flying from St. Louis to Pittsburgh

Discover the top 3 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 December 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$226Average$368FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$241Average$365FlexibilityNo cancel feeOn-time63%
DeltaCheapest$252Average$349FlexibilityNo cancel feeOn-timeN/A

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