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$90+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PIT
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 77 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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 July 30, 2025.

Round-trip from

$171
(American Airlines)

One-way from

$90
(American Airlines)

Popular in

November

Cheapest in

May

Average price

$385

Good round-trip deal

$296 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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Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/29. 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 8/266:06 amSTL - PIT
1 stop10h 59mAmerican Airlines
Tue 9/28:20 amPIT - STL
1 stop8h 29mAmerican Airlines
Deal found 7/29$171
This Southwest deal was found by Cheapflights users on 7/29. 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 8/262:30 pmSTL - PIT
Nonstop1h 35mSouthwest
Tue 9/21:05 pmPIT - STL
Nonstop1h 45mSouthwest
Deal found 7/29$217
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:52 pmSTL - PIT
1 stop19h 41mFrontier
Sun 10/195:28 pmPIT - STL
1 stop16h 39mFrontier
Deal found 7/30$225
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/46:35 amSTL - PIT
1 stop5h 30mUnited Airlines
Sat 9/68:46 amPIT - STL
1 stop4h 39mUnited Airlines
Deal found 7/29$227
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:05 pmSTL - PIT
3 stops29h 53mSpirit Airlines
Sat 9/67:00 amPIT - STL
2 stops28h 50mSpirit Airlines
Deal found 7/29$248
This Mytrip deal was found by Cheapflights users on 7/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:05 pmSTL - PIT
3 stops29h 53mMultiple Airlines
Sun 9/287:00 amPIT - STL
3 stops30h 00mMultiple Airlines
Deal found 7/28$318

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 July 30, 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 8/26

6:06 am-6:05 pm

1 stop10h 59m

Pittsburgh

Tue 9/2

8:20 am-3:49 pm

1 stop8h 29m

$171

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 8/26

2:30 pm-5:05 pm

Nonstop1h 35m

Pittsburgh

Tue 9/2

1:05 pm-1:50 pm

Nonstop1h 45m

$217

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 10/16

7:52 pm-4:33 pm

1 stop19h 41m

Pittsburgh

Sun 10/19

5:28 pm-9:07 am

1 stop16h 39m

$225

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 9/4

6:35 am-1:05 pm

1 stop5h 30m

Pittsburgh

Sat 9/6

8:46 am-12:25 pm

1 stop4h 39m

$227

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 9/4

12:05 pm-6:58 pm

3 stops29h 53m

Pittsburgh

Sat 9/6

7:00 am-10:50 am

2 stops28h 50m

$248

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 9/25

12:05 pm-6:58 pm

3 stops29h 53m

Pittsburgh

Sun 9/28

7:00 am-12:00 pm

3 stops30h 00m

$318

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 10/28

7:16 am-4:34 pm

1 stop8h 18m

$90

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 10/28

6:40 pm-9:15 pm

Nonstop1h 35m

$109

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 10/23

10:35 am-6:58 pm

1 stop7h 23m

$111

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 9/27

7:10 am-12:40 pm

1 stop4h 30m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 13 results
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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 July 25, 2025.

The best time to book flights from St. Louis to Pittsburgh is 77 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 $332). 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 July 30, 2025.

It’s typically best to fly out from St. Louis to Pittsburgh in the afternoon. Doing so could potentially save you 43% 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 July 30, 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
4,241 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,896 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,048 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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

    Currently priced at $171, 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 Frontier - these airlines can fly you to your destination from $217 and $225, respectively. These flights start at 52% 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 American Airlines, with whom users have recently found tickets for as low as $90. However, be on the lookout for offers from Southwest and Spirit 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 $545. The most popular route, (Lambert-St Louis - Pittsburgh), can usually be booked for $221.

  • 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 $332). 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$252Average$348FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$442FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$335FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$270Average$372FlexibilityNo cancel feeOn-time63%

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