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$97+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PIT
Mar 8 — Mar 151
Sat 3/8
Sat 3/15
1 adult, Economy
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The best prices from Lambert-St Louis to Pittsburgh are usually found in August or January, booked 27 days in advance, depart on a Tuesday or Wednesday and return on a Sunday

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 March 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$170
(Frontier)

One-way from

$97
(American Airlines)

Popular in

November

Cheapest in

August

Average price

$340

Good round-trip deal

$314 or less

Good one-way deal

$171 or less
Provider with most accurate pricing for Lambert-St Louis-Pittsburgh flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Pittsburgh flights.
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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. 4% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Pittsburgh.
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Price to beat on a one-way 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 March 3, 2025.

This Frontier deal was found by Cheapflights users on 3/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/104:57 pmSTL - PIT
1 stop14h 46mFrontier
Mon 4/149:46 amPIT - STL
1 stop15h 00mFrontier
Deal found 3/2$170
This American Airlines deal was found by Cheapflights users on 3/2. 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 5/296:00 amSTL - PIT
1 stop8h 45mAmerican Airlines
Sat 5/316:43 amPIT - STL
1 stop7h 24mAmerican Airlines
Deal found 3/2$213
This Mytrip deal was found by Cheapflights users on 3/2. 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 4/106:10 pmSTL - PIT
1 stop13h 39mSpirit Airlines
Mon 4/149:07 pmPIT - STL
3 stops21h 08mSpirit Airlines
Deal found 3/2$244
This Southwest deal was found by Cheapflights users on 3/2. 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.
Thu 4/104:10 pmSTL - PIT
Nonstop1h 35mSouthwest
Mon 4/141:05 pmPIT - STL
Nonstop1h 45mSouthwest
Deal found 3/2$245
This Delta deal was found by Cheapflights users on 3/3. 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 4/74:43 pmSTL - PIT
1 stop4h 16mDelta
Tue 4/156:25 amPIT - STL
1 stop4h 03mDelta
Deal found 3/3$259
This Mytrip deal was found by Cheapflights users on 3/2. 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 4/109:50 amSTL - PIT
2 stops11h 45mMultiple Airlines
Mon 4/149:07 pmPIT - STL
3 stops21h 08mMultiple Airlines
Deal found 3/2$261
This United Airlines deal was found by Cheapflights users on 3/2. 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 4/306:30 amSTL - PIT
1 stop16h 10mUnited Airlines
Mon 5/57:50 pmPIT - STL
3 stops20h 57mUnited Airlines
Deal found 3/2$379
This Alaska Airlines deal was found by Cheapflights users on 3/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:44 amSTL - PIT
2 stops26h 25mAlaska Airlines
Wed 4/27:36 pmPIT - STL
2 stops14h 12mAlaska Airlines
Deal found 3/3$730

Find flights from St. Louis to Pittsburgh within your budget

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 March 3, 2025.

Fly from

St. Louis

Fly to

Pittsburgh

Route

Depart

Return

Price

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 4/10

4:57 pm-8:43 am

1 stop14h 46m

Pittsburgh

Mon 4/14

9:46 am-11:46 pm

1 stop15h 00m

$170

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 5/29

6:00 am-3:45 pm

1 stop8h 45m

Pittsburgh

Sat 5/31

6:43 am-1:07 pm

1 stop7h 24m

$213

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 4/10

6:10 pm-8:49 am

1 stop13h 39m

Pittsburgh

Mon 4/14

9:07 pm-5:15 pm

3 stops21h 08m

$244

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 4/10

4:10 pm-6:45 pm

Nonstop1h 35m

Pittsburgh

Mon 4/14

1:05 pm-1:50 pm

Nonstop1h 45m

$245

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Mon 4/7

4:43 pm-9:59 pm

1 stop4h 16m

Pittsburgh

Tue 4/15

6:25 am-9:28 am

1 stop4h 03m

$259

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 4/10

9:50 am-10:35 pm

2 stops11h 45m

Pittsburgh

Mon 4/14

9:07 pm-5:15 pm

3 stops21h 08m

$261

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 4/30

6:30 am-11:40 pm

1 stop16h 10m

Pittsburgh

Mon 5/5

7:50 pm-3:47 pm

3 stops20h 57m

$379

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 4/5

3:11 pm-10:06 am

2 stops17h 55m

Pittsburgh

Sun 4/6

7:36 pm-9:01 am

2 stops14h 25m

$984

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Mon 3/24

10:12 am-9:25 pm

1 stop10h 13m

$97

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 6/3

12:45 pm-3:20 pm

Nonstop1h 35m

$123

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 14 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Pittsburgh flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

Travel insights for flights from St. Louis to Pittsburgh

Get recent, data-driven insights about flights from St. Louis to Pittsburgh including ideal travel times, pricing trends, and more.

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 February 28, 2025.

The best time to book flights from St. Louis to Pittsburgh is 27 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 March 3, 2025.

It’s typically best to fly out from St. Louis to Pittsburgh in the afternoon. Doing so could potentially save you 19% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in Pittsburgh by month

Plan your trip to Pittsburgh by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Pittsburgh ranges from 2.3 - 4.3 inches per month. June is typically the wettest month, when rainfall can reach 4.3 in. October is typically the driest time to visit Pittsburgh when rainfall is around 2.3 in.

Temperature in Pittsburgh by month

Plan your trip to Pittsburgh by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Pittsburgh, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

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 March 3, 2025.
Read through reviews of airlines operating flights from St. Louis to Pittsburgh, such as Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest
8.1
Very good
4,333 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines
8.0
Very good
9,713 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta
8.0
Very good
8,070 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines
7.4
Good
8,679 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 $170, Frontier will fly you from St. Louis to Pittsburgh and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Spirit Airlines - these airlines can fly you to your destination from $213 and $244, 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 $97. However, be on the lookout for offers from Southwest and Delta, 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 $147. On average you can expect to pay $388. The most popular route, (Lambert-St Louis - Pittsburgh), can usually be booked for $197.

  • 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Monroeville
Washington
Steubenville
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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Columbia to Philadelphia flights
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Joplin to Philadelphia flights
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Fort Leonard Wood to Reagan-National flights
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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 March 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$247Average$344FlexibilityNo cancel feeOn-time71%
DeltaCheapest$258Average$344FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$276Average$376FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$288Average$485FlexibilityNo cancel feeOn-time69%
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