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St. Louis

$74+ Cheap flights from Pittsburgh to St. Louis (PIT - STL)

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — STL
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheapflights Tip: The best prices from Pittsburgh to Lambert-St Louis are usually found in April or May, booked 29 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Pittsburgh to St. Louis

Cheapest flights from Pittsburgh to St. Louis
Explore the most affordable flight options available from Pittsburgh to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This American Airlines deal was found by Cheapflights users on 12/2. 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 12/257:00 amPIT - STL
1 stop8h 09mAmerican Airlines
Thu 1/19:08 amSTL - PIT
1 stop7h 16mAmerican Airlines
Deal found 12/2$183
This Kiwi.com deal was found by Cheapflights users on 12/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/119:30 amPIT - STL
2 stops10h 06mMultiple Airlines
Sun 1/119:35 amSTL - PIT
1 stop11h 23mMultiple Airlines
Deal found 12/2$243
This Kiwi.com deal was found by Cheapflights users on 12/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1810:53 amPIT - STL
2 stops12h 40mMultiple Airlines
Wed 1/75:11 pmSTL - PIT
1 stop28h 56mMultiple Airlines
Deal found 12/3$255
This American Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/318:15 amPIT - STL
1 stop9h 08mAmerican Airlines
Sun 1/49:28 pmSTL - PIT
1 stop4h 17mAmerican Airlines
Deal found 12/2$266
This Kiwi.com deal was found by Cheapflights users on 12/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:53 amPIT - STL
1 stop25h 03mMultiple Airlines
Tue 12/3010:48 amSTL - PIT
2 stops11h 11mMultiple Airlines
Deal found 12/2$269

Find flight deals from Pittsburgh to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Pittsburgh (PIT) to St. Louis (STL). 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 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$183
(American Airlines)

One-way from

$74
(Mytrip)

Popular in

January

Cheapest in

April

Average price

$355

Good round-trip deal

$308 or less

Good one-way deal

$256 or less
Provider with most accurate pricing for Pittsburgh-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Pittsburgh-Lambert-St Louis flights.
Search Deals
From Pittsburgh to Lambert-St Louis
Search Deals
One-way flight from Pittsburgh to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Pittsburgh to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Pittsburgh to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pittsburgh to St. Louis 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 4, 2025.
Use the filters below to find and compare flights from Pittsburgh to St. Louis that are best for you.

Fly from

Pittsburgh

Fly to

St. Louis

Route

Depart

Return

Price

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 1/12

12:30 pm-1:30 pm

Nonstop2h 00m

Lambert-St Louis

Wed 1/14

6:15 pm-8:50 pm

Nonstop1h 35m

$222

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 1/12

7:04 pm-11:12 pm

1 stop5h 08m

Lambert-St Louis

Wed 1/14

5:59 pm-11:10 pm

1 stop4h 11m

$229

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Thu 12/18

10:53 am-10:33 pm

2 stops12h 40m

Lambert-St Louis

Wed 1/7

5:11 pm-11:07 pm

1 stop28h 56m

$255

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sat 1/24

1:13 pm-7:27 pm

1 stop7h 14m

Lambert-St Louis

Mon 1/26

5:56 pm-11:42 pm

1 stop4h 46m

$259

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Tue 12/30

5:54 pm-9:45 pm

1 stop4h 51m

Lambert-St Louis

Sat 2/7

11:05 am-9:12 pm

1 stop9h 07m

$272

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 3/4

7:09 am-11:02 am

1 stop4h 53m

Lambert-St Louis

Sun 3/8

6:32 am-1:22 pm

1 stop5h 50m

$274

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 12/24

8:00 am-10:56 am

1 stop27h 56m

Lambert-St Louis

Tue 12/30

11:51 am-10:42 pm

1 stop9h 51m

$287

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sat 1/24

8:56 am-4:03 pm

1 stop8h 07m

Lambert-St Louis

Mon 1/26

9:57 am-8:41 pm

1 stop9h 44m

$291

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 12/24

8:00 am-9:40 am

2 stops26h 40m

Lambert-St Louis

Tue 12/30

11:51 am-10:42 pm

1 stop9h 51m

$301

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Fri 1/23

5:32 am-11:33 pm

1 stop19h 01m

$87

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 18 results
1
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Compare providers for flights from Pittsburgh to St. Louis

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 Pittsburgh to St. Louis in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 Pittsburgh-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Pittsburgh-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Pittsburgh-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Pittsburgh-St. Louis 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 Pittsburgh-St. Louis 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 Pittsburgh to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Pittsburgh 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 Pittsburgh to St. Louis

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

Use this chart to determine the optimal time to book a round-trip flight from Pittsburgh to St. Louis. Price data was last updated on November 28, 2025.

Booking 29 days in advance of your planned departure date is, on average, the best time to get cheap flights from Pittsburgh to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, December is the cheapest month in which you can book a flight from Pittsburgh to St. Louis (average of $170). Flying from Pittsburgh to St. Louis in February is currently the most expensive (average of $274). 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 PIT to STL?

Find hourly flight availability from Pittsburgh to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

A simple way to save on the total cost of your ticket is to fly from Pittsburgh to St. Louis at noon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the evening.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated December 4, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Pittsburgh to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

8.0

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
8.0
Very good
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

8.0

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
8,011 reviews
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

8.0

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
United Airlines
7.4
Good
9,066 reviews
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

8.0

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
11,047 reviews
Southwest
8.0
Very good
4,250 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

8.0

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 Pittsburgh to St. Louis. 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 Pittsburgh to St. Louis flight route?

    This flight path from Pittsburgh to Lambert-St Louis was viewed by 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Southwest and American Airlines can get you from Pittsburgh to St. Louis in just under 2h. Your travel time can differ by up to 3h 08m. Airlines will cover a distance of 552 mi. This flight may include one or multiple stops.

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

    American Airlines, at $171, was found to be the cheapest airline from Pittsburgh to St. Louis.Alternate airlines to your destination round-trip include Southwest and Delta. Users have found that American Airlines is 50% cheaper than the other options available to this destination.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $122. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Pittsburgh to St. Louis for a low price.

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

    The cheapest flight price from Pittsburgh to St. Louis is $98. On average you can expect to pay $317. The most popular route, (Pittsburgh - Lambert-St Louis), can usually be booked for $226.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Pittsburgh to St. Louis 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 Pittsburgh to St. Louis?

    Currently, December is the cheapest month in which you can book a flight from Pittsburgh to St. Louis (average of $170). Flying from Pittsburgh to St. Louis in February is currently the most expensive (average of $274). 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Pittsburgh to St. Louis

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

Discover the top 4 airlines that operate flights from Pittsburgh to St. Louis. 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 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$171Average$338FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$241Average$343FlexibilityNo cancel feeOn-time63%
DeltaCheapest$258Average$304FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$408FlexibilityNo cancel feeOn-time69%

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