PIT - STL

$99 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 6/10. 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

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Everything you should know

Cheapest round-trip
$197
Typical prices: $469-$265
American Airlines
Sat 5/30Tue 6/2
PIT - STL • 1 stop
Cheapest non-stop
$251
Typical prices: $380-$297
Southwest
Sat 5/23Tue 5/26
PIT - STL • Non-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 $197 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Southwest. Average duration is 1h 50m
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 • 20% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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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

Sat, May 30 - Tue, Jun 2
American Airlines Logo
3:56 pm - 8:30 pm
PIT
-
STL
5h 34m
1 stop
American Airlines Logo
8:57 am - 3:06 pm
STL
-
PIT
5h 09m
1 stop
$197American Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
8:15 pm - 11:57 pm
PIT
-
STL
28h 42m
1 stop
Multiple Airlines Logo
5:27 pm - 10:26 pm
STL
-
PIT
27h 59m
2 stops
$217Multiple Airlines
Sat, May 16 - Tue, May 19
Multiple Airlines Logo
4:58 pm - 12:21 am
PIT
-
STL
8h 23m
1 stop
Multiple Airlines Logo
6:33 pm - 5:40 pm
STL
-
PIT
22h 07m
2 stops
$225Multiple Airlines
Wed, Jun 10 - Wed, Jun 24
United Airlines Logo
6:11 pm - 9:16 pm
PIT
-
STL
4h 05m
1 stop
United Airlines Logo
9:23 am - 3:23 pm
STL
-
PIT
5h 00m
1 stop
$227United Airlines
Sat, May 16 - Tue, May 19
Multiple Airlines Logo
4:58 pm - 12:21 am
PIT
-
STL
8h 23m
1 stop
Multiple Airlines Logo
6:33 pm - 5:40 pm
STL
-
PIT
22h 07m
2 stops
$228Multiple Airlines
Mon, May 18 - Thu, May 21
Multiple Airlines Logo
4:58 pm - 12:21 am
PIT
-
STL
8h 23m
1 stop
Multiple Airlines Logo
4:19 pm - 7:20 pm
STL
-
PIT
26h 01m
1 stop
$247Multiple Airlines
Mon, May 18 - Wed, May 20
Multiple Airlines Logo
8:00 am - 12:21 am
PIT
-
STL
17h 21m
1 stop
Multiple Airlines Logo
5:27 pm - 10:07 pm
STL
-
PIT
27h 40m
2 stops
$248Multiple Airlines
Wed, May 27 - Sun, May 31
American Airlines Logo
12:37 pm - 4:59 pm
PIT
-
STL
5h 22m
1 stop
American Airlines Logo
6:00 am - 11:44 am
STL
-
PIT
4h 44m
1 stop
$250American Airlines
Sat, May 23 - Tue, May 26
Southwest Logo
7:15 am - 8:05 am
PIT
-
STL
1h 50mnonstop
Southwest Logo
10:15 am - 12:55 pm
STL
-
PIT
1h 40mnonstop
$251Southwest
Sun, May 17 - Sat, May 23
Multiple Airlines Logo
8:15 pm - 12:21 am
PIT
-
STL
29h 06m
1 stop
Multiple Airlines Logo
5:27 pm - 4:06 pm
STL
-
PIT
21h 39m
2 stops
$258Multiple Airlines
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.

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

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

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 Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Pittsburgh to St. Louis. For your return ticket, we recommend flying on a Saturday 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 April and October, where the average cost of round-trip tickets is $440 and $393 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 $338 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 12 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$99
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly and prices are also 2% 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 $99 for a one-way ticket and $197 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 $350 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 $178 or less one-way and $378 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 4314 reviews
8.6Crew
8.1Boarding
8.0Comfort
7.0Food
7.5Entertainment
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The captain announced to the cabin there would be a delay because they observed a "cut" on a tire during precheck that needed to be cleared by maintenance. We were delayed during this inspection and allowed to proceed after maintenance "measured the cut and decided it was acceptable". My complaint is not about the delay or due diligence. I wish the captain had been more generic when making his announcement. I was a nervous wreck all the way to Charlotte worried that we would have a blowout when landing!

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

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

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.

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

Information on your arrival and departure airports