STL - PIT

$90 Find Cheap Flights from St. Louis to Pittsburgh - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Pittsburgh departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Everything you should know

Cheapest round-trip
$197
Typical prices: $241-$482
Southwest
Wed 9/2Mon 9/7
STL - PIT • Non-stop
Cheapest one-way
$90
Typical prices: $171-$384
Multiple Airlines
Wed 10/21
STL - PIT • 2 stops
Top airlines
Cheapest • from $197 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with Southwest. Average duration is 1h 37m
Direct flights
Direct flights
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+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $244 (round-trip)
Shortest trip • 3h 35m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
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Good to know
Good to know
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We hope you love your trip to Pittsburgh!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from St. Louis to Pittsburgh (STL-PIT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Pittsburgh that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Pittsburgh

Wed, Sep 2 - Mon, Sep 7
Southwest Logo
10:25 am - 1:05 pm
STL
-
PIT
1h 40mnonstop
Southwest Logo
7:00 am - 7:45 am
PIT
-
STL
1h 45mnonstop
$197Southwest
Tue, Aug 18 - Sat, Aug 22
Southwest Logo
6:50 pm - 9:25 pm
STL
-
PIT
1h 35mnonstop
Southwest Logo
6:50 am - 7:30 am
PIT
-
STL
1h 40mnonstop
$197Southwest
Thu, Sep 3 - Mon, Sep 7
American Airlines Logo
6:00 am - 11:54 am
STL
-
PIT
4h 54m
1 stop
American Airlines Logo
8:59 pm - 12:14 am
PIT
-
STL
4h 15m
1 stop
$217American Airlines
Sat, Sep 12 - Sat, Sep 19
American Airlines Logo
7:27 am - 12:32 pm
STL
-
PIT
4h 05m
1 stop
American Airlines Logo
8:47 pm - 12:27 am
PIT
-
STL
4h 40m
1 stop
$217American Airlines
Thu, Sep 3 - Mon, Sep 7
Delta Logo
6:30 am - 11:19 am
STL
-
PIT
3h 49m
1 stop
Delta Logo
5:50 am - 9:20 am
PIT
-
STL
4h 30m
1 stop
$217Delta
Tue, Aug 18 - Sat, Aug 22
Delta Logo
11:00 am - 5:14 pm
STL
-
PIT
5h 14m
1 stop
Delta Logo
5:50 am - 11:56 am
PIT
-
STL
7h 06m
1 stop
$217Delta
Sat, Aug 29 - Sat, Sep 5
United Airlines Logo
8:00 am - 1:15 pm
STL
-
PIT
4h 15m
1 stop
United Airlines Logo
8:45 am - 12:03 pm
PIT
-
STL
4h 18m
1 stop
$232United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
8:00 am - 1:15 pm
STL
-
PIT
4h 15m
1 stop
United Airlines Logo
2:11 pm - 5:06 pm
PIT
-
STL
3h 55m
1 stop
$232United Airlines
Sun, Aug 23 - Sun, Aug 30
Multiple Airlines Logo
6:17 pm - 11:21 am
STL
-
PIT
40h 04m
2 stops
Multiple Airlines Logo
7:10 pm - 3:28 pm
PIT
-
STL
21h 18m
1 stop
$291Multiple Airlines
Wed, Aug 26 - Sun, Aug 30
Multiple Airlines Logo
2:10 pm - 11:51 am
STL
-
PIT
20h 41m
2 stops
Multiple Airlines Logo
7:10 pm - 3:28 pm
PIT
-
STL
21h 18m
1 stop
$320Multiple Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Pittsburgh flights

Get data-powered insights and trends into flights from St. Louis to Pittsburgh to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Pittsburgh?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Pittsburgh departing in August.

Flight prices are below average for this route right now.

Flights to Pittsburgh from St. Louis usually cost between $311 and $423 in August.
The lowest price found in the past 5 days was $197 on Southwest (Aug 18-Aug 22).

What’s the cheapest day of the week to fly from St. Louis to Pittsburgh?

The average price of all round-trip flights from St. Louis to Pittsburgh clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Pittsburgh on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from St. Louis to Pittsburgh. For your return ticket, we recommend flying on a Tuesday and avoiding Saturdays for the best deals.

What is the cheapest month to fly from St. Louis to Pittsburgh?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Pittsburgh, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Pittsburgh is December, where tickets cost $263 (return) on average. On the other hand, the most expensive months are January and October, where the average cost of round-trip tickets is $437 and $436 respectively.

Can I save money by flying with a layover from St. Louis to Pittsburgh?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $355 on average.

Expert advice

Expert advice for your flight from St. Louis to Pittsburgh

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Matt Meltzer

Matt Meltzer

Expert on PIT

Matt Meltzer has been a travel writer for over a decade, covering U.S. domestic locations and hotels for Thrillist, Fifty Grande, Matador Network, Conde Nast Traveler, and other top publications. He's won multiple travel journalism awards from the Society of American Travel Writers and North American Travel Journalists Association, and currently resides in South Florida.

Good to know

Low season

January

Cheapest flight

$90
Best time to beat the crowds but there is an average 19% increase in price.
Flight from St. Louis to Pittsburgh

When to book flights from St. Louis to Pittsburgh

Are your dates flexible? Find out the best times to travel from St. Louis to Pittsburgh based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Pittsburgh

  • What is the cheapest flight from St. Louis to Pittsburgh?

    In the last 5 days, the lowest price for a flight from St. Louis to Pittsburgh was $90 for a one-way ticket and $197 for a round-trip.

  • Do I need a passport to fly between St. Louis and Pittsburgh?

    No

  • Which airports will I be using when flying from St. Louis to Pittsburgh?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Pittsburgh, also known as Pittsburgh.

  • Which aircraft models fly most regularly from St. Louis to Pittsburgh?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the St. Louis to Pittsburgh flight route.

  • Which airline alliances offer flights from St. Louis to Pittsburgh?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Pittsburgh, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from St. Louis to Pittsburgh?

    There are nonstop flights from St. Louis to Pittsburgh on a daily basis.

  • Which is the best airline for flights from St. Louis to Pittsburgh, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Pittsburgh are Southwest and Delta. With an average price for the route of $354 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $436 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from St. Louis to Pittsburgh?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Pittsburgh.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Pittsburgh?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Pittsburgh from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Pittsburgh?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Pittsburgh with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and PIT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Pittsburgh?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Pittsburgh from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to Pittsburgh

  • Looking for a cheap flight? 25% of our users found flights on this route for $309 or less round-trip.

Prefer to fly direct from St. Louis to Pittsburgh?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Pittsburgh.
Find which airlines fly direct from Lambert-St Louis Airport to Pittsburgh Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Pittsburgh

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Pittsburgh to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top 4 airlines serving from St. Louis to Pittsburgh

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Pittsburgh. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Pittsburgh? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4228 reviews
8.6Crew
7.0Food
8.0Comfort
7.5Entertainment
8.1Boarding
Airline reviews

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

2.0 MediocreBeth, Mar 2026
MDW - PIT
Read more Southwest reviews

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

Snacks are always pretzels. Why can't you also offer peanuts ?

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Very good. Sad to learn Southwest is going start to charge for bags

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

The flight was promptly on schedule and Southwest delivered everything they promised. No excuses for any shortfalls just 100% ownership of their responsibilities and business. The boarding and seating policy is a complete shambles. What started out as a great idea when Southwest first hit the market has been turned into a disaster due to the lack of integrity in many of the people who fly Southwest and take advantage of Southwest generosity at the expense of their fellow passengers.

Crew was excellent - Plane was fine. Media was good, could use more kid shows; Not a fan of the brownie brittle -- snack could be slightly better.

Left on time and arrived early. Brand new plane and no parts missing. Comfortable seats. The actual Captain spoke prior to the flight and reassured everyone about safety. Crew was so nice and fun. Perfect flight!

Having a direct flight between Pittsburgh and Austin makes traveling so easy.

Everything went smoothly and the plane wasn’t full. It was delayed though. The delay was increased due to a crew change which was frustrating.

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

Delayed. Hot. Passenger next to me was so large I couldn’t move.

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

Ok so apparently the new policy on United Airlines is that customers in the main cabin should NEVER be served more than once and besides picking up trash there should NEVER be another interaction with the customer for any reason.

My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Message about flight cancelation was received late due to being in the air. No explanation, just canceled and booked on morning flight. We had to stay in the airport overnight because there was no transportation offered to get to the hotel that AA had available. Actual inflight was fine.

Bag drop was very disorganized in Miami. All main cabin passengers were shunted to just a few lanes and they had an equal number of lanes for first class passengers but there was nobody on those lines. They did nothing to bring the main cab and passengers over to the open lines and they just had employees standing there and doing nothing

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

Staff at the gate were incredibly rude, hostile and threatening. Never fly American Airlines.

Great - quick boarding and landed early with an available gate.

The flight was delayed till next day ! They kept delaying every 30 minutes then after 3 hours they delayed it till next day. We kept waiting in line standing more than an hour to get the hotel and meal vouchers. There was no communication at all. Everything was bad

The flight was great but board was a nightmare. The gate was changed 4 times during the layover period

I don’t think the flight attendants are happy. They do not seem to be friendly or welcoming.

Everything you need to know for your flight from St. Louis to Pittsburgh

Information on your arrival and departure airports