PIT - STL

$86 Find Cheap Flights from Pittsburgh to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Pittsburgh to St. Louis departing on 4/10. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Pittsburgh to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Pittsburgh to St. Louis, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$237
Overall average: $333
Southwest
Tue 4/7Wed 4/8
PIT - STL • Non-stop
Cheapest one-way
$86
Typical prices: $158-$269
Frontier
Fri 4/10
PIT - STL • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Arrive early at PIT due to construction delays.
Use MetroLink for easy access from STL to downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $237 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Southwest. Average duration is 1h 52m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $256 (round-trip)
Shortest trip • 3h 48m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 38% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Pittsburgh to St. Louis 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 Pittsburgh to St. Louis

Tue, Apr 7 - Wed, Apr 8
Southwest Logo
6:50 am - 7:40 am
PIT
-
STL
1h 50mnonstop
Southwest Logo
10:15 am - 12:55 pm
STL
-
PIT
1h 40mnonstop
$237Southwest
Tue, Apr 7 - Wed, Apr 8
Southwest Logo
1:25 pm - 5:55 pm
PIT
-
STL
5h 30m
1 stop
Southwest Logo
6:45 pm - 9:20 pm
STL
-
PIT
1h 35mnonstop
$242Southwest
Tue, Apr 7 - Wed, Apr 8
Southwest Logo
10:50 am - 3:15 pm
PIT
-
STL
5h 25m
1 stop
Southwest Logo
3:55 pm - 11:20 pm
STL
-
PIT
6h 25m
1 stop
$247Southwest
Thu, Apr 2 - Tue, Apr 14
Southwest Logo
8:05 pm - 8:55 pm
PIT
-
STL
1h 50mnonstop
Southwest Logo
6:45 pm - 9:20 pm
STL
-
PIT
1h 35mnonstop
$251Southwest
Tue, Apr 7 - Wed, Apr 8
Southwest Logo
6:05 am - 1:00 pm
PIT
-
STL
7h 55m
2 stops
Southwest Logo
8:35 am - 4:20 pm
STL
-
PIT
6h 45m
1 stop
$252Southwest
Mon, Apr 6 - Wed, Apr 8
Southwest Logo
8:05 pm - 8:55 pm
PIT
-
STL
1h 50mnonstop
Southwest Logo
6:45 pm - 9:20 pm
STL
-
PIT
1h 35mnonstop
$254Southwest
Thu, Apr 2 - Tue, Apr 14
Southwest Logo
8:05 pm - 8:55 pm
PIT
-
STL
1h 50mnonstop
Southwest Logo
1:45 pm - 8:45 pm
STL
-
PIT
6h 00m
1 stop
$256Southwest
Mon, Apr 6 - Tue, Apr 7
Southwest Logo
6:25 pm - 11:45 pm
PIT
-
STL
6h 20m
1 stop
Southwest Logo
6:45 pm - 9:20 pm
STL
-
PIT
1h 35mnonstop
$259Southwest
Sun, Apr 12 - Tue, Apr 14
Southwest Logo
8:55 pm - 11:45 pm
PIT
-
STL
3h 50m
1 stop
Southwest Logo
6:45 pm - 9:20 pm
STL
-
PIT
1h 35mnonstop
$262Southwest
Tue, Mar 31 - Mon, Apr 6
Southwest Logo
7:05 pm - 8:00 pm
PIT
-
STL
1h 55mnonstop
Southwest Logo
5:30 am - 10:05 am
STL
-
PIT
3h 35m
1 stop
$264Southwest
Booking Insights

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

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

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

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

If your flying dates are flexible, you should consider flying to St. Louis 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 Pittsburgh to St. Louis. For your return ticket, we recommend flying on a Wednesday and avoiding Mondays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Pittsburgh to St. Louis, 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 Pittsburgh to St. Louis is November, where tickets cost $283 (return) on average. On the other hand, the most expensive months are October and March, where the average cost of round-trip tickets is $390 and $387 respectively.

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

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 $340 on average.

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

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

To get a below average price on the flight from Pittsburgh to St. Louis, you should book around 4 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Expert advice

Expert advice for your flight from Pittsburgh to St. Louis

 
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 seasonNovember
Cheapest flight$86
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Pittsburgh to St. Louis

When to book flights from Pittsburgh to St. Louis

Are your dates flexible? Find out the best times to travel from Pittsburgh to St. Louis 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 Pittsburgh to St. Louis

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

    In the last 3 days, the lowest price for a flight from Pittsburgh to St. Louis was $86 for a one-way ticket and $237 for a round-trip.

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

    No, a passport isn't needed to fly from Pittsburgh to St. Louis. However, local authorities might ask for an official ID.

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

    Pittsburgh airport is called Pittsburgh and the only airport in St. Louis is Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from Pittsburgh to St. Louis?

    American Airlines, JetBlue, and Delta offer inflight Wi-Fi service on the Pittsburgh to St. Louis flight route.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Pittsburgh to St. Louis are Southwest and Delta. With an average price for the route of $331 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 $404 and an overall rating of 7.9.

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

    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 Pittsburgh to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Pittsburgh 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 Pittsburgh to St. Louis?

    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 St. Louis with an airline and back to Pittsburgh with another airline. Booking your flights between Pittsburgh and STL 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 Pittsburgh to St. Louis?

    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 St. Louis from Pittsburgh 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 Pittsburgh to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $175 or less one-way and $331 or less round-trip.

Prefer to fly direct from Pittsburgh to St. Louis?

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

Direct departures

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

Direct returns

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

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

 
See real verified KAYAK customer reviews for airlines flying from Pittsburgh to St. Louis. 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 Pittsburgh to St. Louis? 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 4318 reviews
7.5Entertainment
8.6Crew
8.0Comfort
7.0Food
8.1Boarding
Airline reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

4.0 OkayKenny, Mar 2026
TPA - BWI
Read more Southwest reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

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

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

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

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

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

Information on your arrival and departure airports