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St. Louis

$77+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — STL
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheapflights Tip: The best prices from Pittsburgh to Lambert-St Louis are usually found in April or November, booked 29 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap 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 January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$153
(Southwest)

One-way from

$77
(Southwest)

Popular in

October

Cheapest in

April

Average price

$350

Good round-trip deal

$371 or less

Good one-way deal

$248 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.
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From Pittsburgh to Lambert-St Louis
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One-way flight from Pittsburgh to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($14 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 January 2026
Search Deals
Price to beat on a round-trip flight from Pittsburgh to Lambert-St Louis.
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Price to beat on a one-way flight from Pittsburgh to Lambert-St Louis.
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Find 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 January 15, 2026.

This Southwest deal was found by Cheapflights users on 1/14. 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 2/116:55 pm
PIT
-
STL
1 stop4h 00m
Southwest
Wed 2/1811:25 am
STL
-
PIT
1 stop5h 15m
Southwest
Deal found 1/14$153
This Southwest deal was found by Cheapflights users on 1/14. 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 3/112:45 pm
PIT
-
STL
1 stop6h 15m
Southwest
Tue 3/176:10 am
STL
-
PIT
2 stops8h 15m
Southwest
Deal found 1/14$158
This American Airlines deal was found by Cheapflights users on 1/14. 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 2/119:30 am
PIT
-
STL
1 stop6h 34m
American Airlines
Wed 2/186:00 am
STL
-
PIT
1 stop6h 43m
American Airlines
Deal found 1/14$159
This Southwest deal was found by Cheapflights users on 1/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/168:30 am
PIT
-
STL
1 stop5h 00m
Southwest
Tue 3/177:30 am
STL
-
PIT
1 stop3h 40m
Southwest
Deal found 1/13$172
This American Airlines deal was found by Cheapflights users on 1/14. 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 2/123:32 pm
PIT
-
STL
1 stop5h 44m
American Airlines
Tue 2/176:31 pm
STL
-
PIT
1 stop3h 47m
American Airlines
Deal found 1/14$175
This Southwest deal was found by Cheapflights users on 1/15. 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.
Mon 3/96:50 am
PIT
-
STL
Nonstop1h 55m
Southwest
Mon 3/94:20 pm
STL
-
PIT
1 stop6h 45m
Southwest
Deal found 1/15$191
This Delta deal was found by Cheapflights users on 1/13. 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 2/94:55 pm
PIT
-
STL
1 stop7h 42m
Delta
Tue 2/107:10 am
STL
-
PIT
1 stop5h 40m
Delta
Deal found 1/13$211

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 January 15, 2026.
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

Wed 3/11

7:20 pm-10:20 pm

1 stop4h 00m

Lambert-St Louis

Tue 3/17

5:35 am-2:05 pm

1 stop7h 30m

$153

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 3/16

8:30 am-12:30 pm

1 stop5h 00m

Lambert-St Louis

Tue 3/17

7:30 am-12:10 pm

1 stop3h 40m

$172

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 3/9

5:00 am-10:10 am

1 stop6h 10m

Lambert-St Louis

Mon 3/9

4:55 pm-10:55 pm

1 stop5h 00m

$191

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 2/11

12:30 pm-1:30 pm

Nonstop2h 00m

Lambert-St Louis

Wed 2/18

8:20 am-3:45 pm

1 stop6h 25m

$207

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 3/22

6:50 am-7:45 am

Nonstop1h 55m

Lambert-St Louis

Tue 3/24

12:20 pm-6:30 pm

1 stop5h 10m

$251

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 3/15

7:40 pm-8:30 pm

Nonstop1h 50m

Lambert-St Louis

Tue 3/17

5:40 am-10:15 am

1 stop3h 35m

$251

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 4/15

5:25 pm-10:20 pm

1 stop5h 55m

$77

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 3/11

9:15 am-2:35 pm

1 stop6h 20m

$77

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 2/11

6:19 am-9:34 am

1 stop4h 15m

$89

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Tue 2/10

2:58 pm-8:37 pm

1 stop6h 39m

$89

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 15 results
1
2

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 January.
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 January 9, 2026.

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, November is the cheapest month in which you can book a flight from Pittsburgh to St. Louis (average of $156). Flying from Pittsburgh to St. Louis in February is currently the most expensive (average of $272). 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 January 15, 2026.

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 24% on your trip compared to booking a flight in the morning.

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 January 15, 2026.
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
4,258 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

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
4,258 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

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
8,051 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

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
9,164 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

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
11,136 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

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.

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

    You will need to book a flight from Pittsburgh to Lambert-St Louis if you want to fly from Pittsburgh to St. Louis. At least 4 different airlines have flights from Pittsburgh (PIT) to Lambert-St Louis (STL) on a regular basis. There is 1 flight to St. Louis from the Pittsburgh airport per day. If you manage to book one that is nonstop, then you can expect the flight time from PIT to STL to be around 1h 45m.

  • 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 can get you from Pittsburgh to St. Louis in just under 4h. Your travel time can differ by up to . Airlines will cover a distance of 552 mi.

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

    American Airlines, at $170, 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 49% 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 Southwest, with whom users have recently found tickets for as low as $121. However, be on the lookout for offers from Delta 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 $193. On average you can expect to pay $353. The most popular route, (Pittsburgh - Lambert-St Louis), can usually be booked for $153.

  • 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, November is the cheapest month in which you can book a flight from Pittsburgh to St. Louis (average of $156). Flying from Pittsburgh to St. Louis in February is currently the most expensive (average of $272). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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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Newark to Fort Leonard Wood flights
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Elmira to St. Louis flights
Reagan-National to Joplin flights
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Dulles Intl to Joplin flights

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 January 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$170Average$350FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$241Average$339FlexibilityNo cancel feeOn-time63%
DeltaCheapest$258Average$318FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$392FlexibilityNo cancel feeOn-time69%

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