HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$75+ 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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — STL
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pittsburgh to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

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 October 22, 2025.

This American Airlines deal was found by Cheapflights users on 10/21. 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 12/41:49 pmPIT - STL
1 stop6h 41mAmerican Airlines
Sun 12/76:53 pmSTL - PIT
1 stop4h 42mAmerican Airlines
Deal found 10/21$159
This Delta deal was found by Cheapflights users on 10/21. 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 12/237:40 pmPIT - STL
1 stop5h 02mDelta
Mon 1/55:45 pmSTL - PIT
1 stop3h 56mDelta
Deal found 10/21$177
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/210:15 amPIT - STL
1 stop8h 01mSpirit Airlines
Thu 11/67:02 pmSTL - PIT
1 stop15h 07mSpirit Airlines
Deal found 10/19$186
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/210:15 amPIT - STL
1 stop8h 01mMultiple Airlines
Wed 11/57:45 pmSTL - PIT
2 stops33h 36mMultiple Airlines
Deal found 10/19$188
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/210:15 amPIT - STL
1 stop8h 01mMultiple Airlines
Sat 11/87:45 pmSTL - PIT
2 stops33h 36mMultiple Airlines
Deal found 10/19$199
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/210:15 amPIT - STL
1 stop8h 01mMultiple Airlines
Thu 11/611:07 amSTL - PIT
2 stops9h 04mMultiple Airlines
Deal found 10/19$202
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/210:15 amPIT - STL
1 stop8h 01mMultiple Airlines
Fri 11/74:56 pmSTL - PIT
2 stops27h 15mMultiple Airlines
Deal found 10/19$214
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/210:15 amPIT - STL
1 stop8h 01mSpirit Airlines
Sun 11/96:21 pmSTL - PIT
1 stop15h 48mSpirit Airlines
Deal found 10/19$222
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Sun 11/910:15 amPIT - STL
1 stop8h 01mMultiple Airlines
Fri 11/144:56 pmSTL - PIT
2 stops12h 25mMultiple Airlines
Deal found 10/21$228
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/210:15 amPIT - STL
1 stop8h 01mMultiple Airlines
Mon 11/1012:09 pmSTL - PIT
1 stop10h 29mMultiple Airlines
Deal found 10/19$232
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Wed 11/510:15 amPIT - STL
2 stops24h 57mMultiple Airlines
Mon 11/1012:09 pmSTL - PIT
1 stop10h 29mMultiple Airlines
Deal found 10/19$242

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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$159
(American Airlines)

One-way from

$75
(American Airlines)

Popular in

January

Cheapest in

April

Average price

$393

Good round-trip deal

$393 or less

Good one-way deal

$215 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. 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 October 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 October 22, 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

Tue 12/23

7:40 pm-11:42 pm

1 stop5h 02m

Lambert-St Louis

Mon 1/5

5:45 pm-10:41 pm

1 stop3h 56m

$177

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 11/2

10:15 am-5:16 pm

1 stop8h 01m

Lambert-St Louis

Thu 11/6

7:02 pm-11:09 am

1 stop15h 07m

$186

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 11/2

10:15 am-5:16 pm

1 stop8h 01m

Lambert-St Louis

Wed 11/5

7:45 pm-6:21 am

2 stops33h 36m

$188

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 11/2

10:15 am-5:16 pm

1 stop8h 01m

Lambert-St Louis

Mon 11/10

12:09 pm-11:38 pm

1 stop10h 29m

$232

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Tue 12/23

8:55 pm-12:05 am

1 stop4h 10m

Lambert-St Louis

Mon 1/5

8:00 am-10:40 am

Nonstop1h 40m

$242

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 11/2

6:45 pm-9:40 am

1 stop15h 55m

Lambert-St Louis

Thu 11/6

11:07 am-6:21 am

2 stops18h 14m

$257

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 11/12

3:30 pm-4:20 pm

Nonstop1h 50m

Lambert-St Louis

Wed 11/19

6:15 pm-8:50 pm

Nonstop1h 35m

$263

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Thu 11/6

10:06 pm-4:01 pm

2 stops18h 55m

Lambert-St Louis

Mon 11/10

12:09 pm-11:38 pm

1 stop10h 29m

$266

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sat 12/20

7:23 am-1:23 pm

1 stop7h 00m

Lambert-St Louis

Tue 12/30

6:35 pm-12:25 am

1 stop4h 50m

$271

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Thu 12/11

3:30 pm-4:20 pm

Nonstop1h 50m

Lambert-St Louis

Sun 12/14

5:05 pm-11:45 pm

1 stop5h 40m

$286

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 19 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust 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 Pittsburgh-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Pittsburgh-St. Louis flight deals on Cheapflights vs. FlightHub >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 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 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 October 17, 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 $167). 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 October 22, 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 19% 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 October 22, 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
4,237 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,237 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,981 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,990 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,028 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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?

    Delta, Spirit Airlines, and Southwest can get you from Pittsburgh to St. Louis in just under 4h 10m. Your travel time can differ by up to 3h 51m. 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 49% cheaper than the other options available to this destination.

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

    The cheapest flight price from Pittsburgh to St. Louis is $194. On average you can expect to pay $401. The most popular route, (Pittsburgh - Lambert-St Louis), can usually be booked for $177.

  • 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 $167). 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
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Pittsburgh to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Newark to St. Louis flights
John F Kennedy Intl to St. Louis flights
LaGuardia to St. Louis flights
John F Kennedy Intl to Kansas City flights
LaGuardia to Kansas City flights
Newark to Kansas City flights
Dulles Intl to Kansas City flights
Dulles Intl to St. Louis flights
Reagan-National to Kansas City flights
Reagan-National to St. Louis flights
Philadelphia to St. Louis flights
Philadelphia to Kansas City flights
Dulles Intl to Springfield flights
John F Kennedy Intl to Springfield flights
Pittsburgh to Kansas City flights
Newark to Springfield flights
LaGuardia to Springfield flights
Reagan-National to Springfield flights
Philadelphia to Springfield flights
Harrisburg to Springfield flights
Harrisburg to Kansas City flights
Pittsburgh to Springfield flights
LaGuardia to Joplin flights
Allentown to St. Louis flights
Elmira to St. Louis flights
Harrisburg to St. Louis flights
Scranton to Kansas City flights
Allentown to Kansas City flights
Philadelphia to Joplin flights
LaGuardia to Columbia flights
State College to St. Louis flights
Newark to Columbia flights
Reagan-National to Columbia flights
Newark to Joplin flights
Scranton to St. Louis flights
Dulles Intl to Columbia flights
John F Kennedy Intl to Columbia flights
State College to Kansas City flights
Scranton to Springfield flights
Philadelphia to Columbia flights
Reagan-National to Joplin flights
Allentown to Springfield flights
State College to Springfield flights
Pittsburgh to Joplin flights
Elmira to Kansas City flights
Allentown to Joplin flights
Dulles Intl to Joplin flights
Allentown to Columbia flights
Scranton 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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$171Average$350FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$243Average$348FlexibilityNo cancel feeOn-time63%
DeltaCheapest$258Average$318FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$408FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.