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Cheap flights from St. Louis to Pittsburgh from $90

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Pittsburgh departing on 6/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Pittsburgh

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:59 pm - 8:59 am
STL
-
PIT
15h 00m
1 stop
Frontier Logo
3:00 pm - 11:19 pm
PIT
-
STL
9h 19m
1 stop
$212Frontier
Thu, Apr 23 - Mon, Apr 27
Multiple Airlines Logo
6:33 pm - 5:40 pm
STL
-
PIT
22h 07m
2 stops
Multiple Airlines Logo
9:27 pm - 12:14 am
PIT
-
STL
27h 47m
1 stop
$228Multiple Airlines
Tue, Jun 2 - Mon, Jun 8
Multiple Airlines Logo
4:19 pm - 11:18 am
STL
-
PIT
17h 59m
1 stop
Multiple Airlines Logo
8:15 pm - 10:53 am
PIT
-
STL
15h 38m
1 stop
$229Multiple Airlines
Sat, May 30 - Sun, Jun 7
Multiple Airlines Logo
8:23 pm - 8:24 am
STL
-
PIT
35h 01m
2 stops
Multiple Airlines Logo
8:05 pm - 12:21 am
PIT
-
STL
29h 16m
1 stop
$237Multiple Airlines
Sat, May 2 - Sun, May 10
Multiple Airlines Logo
4:19 pm - 7:20 pm
STL
-
PIT
26h 01m
1 stop
Multiple Airlines Logo
9:27 pm - 12:14 am
PIT
-
STL
27h 47m
1 stop
$242Multiple Airlines
Wed, Jun 3 - Mon, Jun 8
American Airlines Logo
8:54 am - 6:32 pm
STL
-
PIT
8h 38m
1 stop
American Airlines Logo
3:09 pm - 11:56 pm
PIT
-
STL
9h 47m
1 stop
$243American Airlines
Wed, May 6 - Wed, May 13
Southwest Logo
5:35 pm - 11:00 pm
STL
-
PIT
4h 25m
1 stop
Southwest Logo
6:50 am - 7:40 am
PIT
-
STL
1h 50mnonstop
$246Southwest
Sat, May 23 - Wed, Jun 3
Frontier Logo
4:19 pm - 7:20 pm
STL
-
PIT
26h 01m
1 stop
Frontier Logo
9:44 am - 12:21 am
PIT
-
STL
15h 37m
1 stop
$249Frontier
Fri, May 8 - Fri, May 15
Delta Logo
4:00 pm - 9:37 pm
STL
-
PIT
4h 37m
1 stop
Delta Logo
10:07 am - 4:10 pm
PIT
-
STL
7h 03m
1 stop
$251Delta
Sat, May 23 - Wed, Jun 3
Multiple Airlines Logo
5:27 pm - 10:07 pm
STL
-
PIT
27h 40m
2 stops
Multiple Airlines Logo
8:15 pm - 10:53 am
PIT
-
STL
15h 38m
1 stop
$252Multiple Airlines
Fri, May 29 - Sun, Jun 7

Delta flights from St. Louis to Pittsburgh

Our best Delta deals on St. Louis to Pittsburgh flight tickets
Delta
May 23
STL4:00 pmLambert-St Louis
4h 37m
1 stop
PIT9:37 pmPittsburgh
Jun 3
PIT10:07 amPittsburgh
7h 03m
1 stop
STL4:10 pmLambert-St Louis
$251
Delta
May 2
STL6:00 amLambert-St Louis
6h 01m
1 stop
PIT1:01 pmPittsburgh
May 4
PIT7:46 pmPittsburgh
4h 50m
1 stop
STL11:36 pmLambert-St Louis
$255
Delta
Jun 3
STL6:57 pmLambert-St Louis
4h 48m
1 stop
PIT12:45 amPittsburgh
Jun 10
PIT5:25 amPittsburgh
5h 21m
1 stop
STL9:46 amLambert-St Louis
$267

Southwest flights from St. Louis to Pittsburgh

Our best Southwest deals on St. Louis to Pittsburgh flight tickets
Southwest
May 23
STL5:35 pmLambert-St Louis
4h 25m
1 stop
PIT11:00 pmPittsburgh
Jun 3
PIT6:50 amPittsburgh
1h 50m
STL7:40 amLambert-St Louis
$246
Southwest
May 2
STL9:55 amLambert-St Louis
5h 20m
1 stop
PIT4:15 pmPittsburgh
May 4
PIT8:05 pmPittsburgh
1h 50m
STL8:55 pmLambert-St Louis
$260
Southwest
May 2
STL6:55 pmLambert-St Louis
1h 35m
PIT9:30 pmPittsburgh
May 4
PIT8:05 pmPittsburgh
1h 50m
STL8:55 pmLambert-St Louis
$265

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Pittsburgh 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, momondo users made 832,500 searches. Data last updated April 13, 2026.
Use the filters below to find and compare flights from St. Louis to Pittsburgh that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 4/23

4:59 pm-8:59 am

1 stop15h 00m

Pittsburgh

Mon 4/27

3:00 pm-11:19 pm

1 stop9h 19m

$212

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 6/2

6:33 pm-5:40 pm

2 stops22h 07m

Pittsburgh

Mon 6/8

9:27 pm-12:14 am

1 stop27h 47m

$228

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 5/30

4:19 pm-11:18 am

1 stop17h 59m

Pittsburgh

Sun 6/7

8:15 pm-10:53 am

1 stop15h 38m

$229

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 5/2

8:23 pm-8:24 am

2 stops35h 01m

Pittsburgh

Sun 5/10

8:05 pm-12:21 am

1 stop29h 16m

$237

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 6/3

4:19 pm-7:20 pm

1 stop26h 01m

Pittsburgh

Mon 6/8

9:27 pm-12:14 am

1 stop27h 47m

$242

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 5/6

8:54 am-6:32 pm

1 stop8h 38m

Pittsburgh

Wed 5/13

3:09 pm-11:56 pm

1 stop9h 47m

$243
Quickest round-trip

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 5/23

5:35 pm-11:00 pm

1 stop4h 25m

Pittsburgh

Wed 6/3

6:50 am-7:40 am

Nonstop1h 50m

$246

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 5/8

4:19 pm-7:20 pm

1 stop26h 01m

Pittsburgh

Fri 5/15

9:44 am-12:21 am

1 stop15h 37m

$249

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 5/23

4:00 pm-9:37 pm

1 stop4h 37m

Pittsburgh

Wed 6/3

10:07 am-4:10 pm

1 stop7h 03m

$251

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 5/29

5:27 pm-10:07 pm

2 stops27h 40m

Pittsburgh

Sun 6/7

8:15 pm-10:53 am

1 stop15h 38m

$252

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Pittsburgh from

How to get the cheapest flight ticket from St. Louis to Pittsburgh

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Pittsburgh?

What is the cheapest month to fly to Pittsburgh?

In general, December is the cheapest month to fly from St. Louis to Pittsburgh. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $263. The month of August is another great option to travel to Pittsburgh, with average flight prices from St. Louis averaging around $320.

What is the cheapest day to depart on your flight to Pittsburgh?

The cheapest day to depart on your flight to Pittsburgh is on a Saturday when prices can be found for as low as $281. This is often the case because there is less demand to fly during this day of the week. Flights from St. Louis to Pittsburgh on a Sunday will generally be more expensive and average around $545. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Pittsburgh?

Our data shows that the cheapest St. Louis to Pittsburgh flights are usually those with departure times in the afternoon. Our users have found flights to Pittsburgh in the afternoon for as low as $289. Flights to Pittsburgh are more costly in the evening, with an average ticket price of $545. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to Pittsburgh flight route?

Fly from Lambert-St Louis to Pittsburgh for the best Lambert-St Louis - Pittsburgh flight prices

What cabin class options are available on Lambert-St Louis to Pittsburgh flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Pittsburgh flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Pittsburgh flights?

You could potentially save up to 44% on your flight if you consider stops on a St. Louis to Pittsburgh flight.

How have St. Louis to Pittsburgh flight prices changed over time?

As of April 2026, prices for St. Louis to Pittsburgh flights are approximately 11% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Pittsburgh

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Pittsburgh according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Pittsburgh (STL to PIT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Pittsburgh

Best Price Found

$194

Fastest flight time

1h 35m

Direct flights

Every day

Airports in Pittsburgh

1 airport
The best one-way flight to Pittsburgh from St. Louis in the past 72 hours is $194. The best round-trip flight deal from St. Louis to Pittsburgh found on momondo in the last 72 hours is $324.
The fastest flight from St. Louis to Pittsburgh takes 1h 35m
Direct flights go from St. Louis to Pittsburgh every day.
There is 1 airport in Pittsburgh. From St. Louis there are direct flights to Pittsburgh (PIT).
Search flight deals

Frequently asked questions about flying from St. Louis to Pittsburgh

  • How far is Lambert-St Louis to Pittsburgh by plane?

    The distance between Lambert-St Louis and Pittsburgh is about 557.2 mi. Typically, this will take 1h 35m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Pittsburgh Airport?

    Prices for flights from Lambert-St Louis Airport to Pittsburgh Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Pittsburgh Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Pittsburgh Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Pittsburgh Airport.

  • What documentation or ID do you need to fly to Pittsburgh Airport?

    The travel and health documents you'll need for your trip to Pittsburgh Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Pittsburgh Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Pittsburgh?

  • What is the most popular airline from St. Louis to Pittsburgh?

Best airlines flying from St. Louis to Pittsburgh

Compare and see reviews for airlines that fly from St. Louis to Pittsburgh with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $208Free CancellationRating
7.1
11,568 reviews
Search American Airlines flights
SouthwestPriceFrom $235Free CancellationRating
8.0
4,331 reviews
Search Southwest flights
DeltaPriceFrom $252Free CancellationRating
7.9
8,406 reviews
Search Delta flights

  • Southwest Flights From St. Louis to Pittsburgh

    Southwest flight deals from St. Louis to Pittsburgh start from $235 round-trip. Over the 10 Southwest flights for this route in a normal week, average airfare is usually $370 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Pittsburgh?

Book flights to Pittsburgh if you plan to visit one of these locations
Washington
Monroeville
Wheeling
Butler
Canonsburg
Triadelphia
New Castle
West Mifflin
Belle Vernon
Steubenville
Coraopolis
Mars
Moon
Wexford
Cadiz
Chester
Bridgeport
Edgewood

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Pittsburgh?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Pittsburgh. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Pittsburgh with flexible booking policies on momondo?

Flights from St. Louis to Pittsburgh with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Pittsburgh?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Pittsburgh from St. Louis.

I’m not ready to book a flight from St. Louis to Pittsburgh right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Pittsburgh, momondo offers a useful price alert feature which will track prices for flights to Pittsburgh from St. Louis and alert you when they change.

An easier way to manage your Pittsburgh trip

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