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Cheap flights from St. Louis to Pittsburgh from $79

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 3/3. 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.
Delta Logo
5:59 pm - 10:46 pm
STL
-
PIT
3h 47m
1 stop
Delta Logo
2:07 pm - 4:40 pm
PIT
-
STL
3h 33m
1 stop
$187Delta
Wed, Apr 1 - Sat, Apr 4
United Airlines Logo
10:00 am - 5:44 pm
STL
-
PIT
6h 44m
1 stop
United Airlines Logo
6:10 am - 10:31 am
PIT
-
STL
5h 21m
1 stop
$195United Airlines
Tue, Apr 7 - Sat, Apr 11
Delta Logo
5:59 pm - 10:46 pm
STL
-
PIT
3h 47m
1 stop
Delta Logo
6:30 am - 9:46 am
PIT
-
STL
4h 16m
1 stop
$197Delta
Tue, Mar 10 - Sun, Mar 15
Frontier Logo
3:49 pm - 10:34 am
STL
-
PIT
17h 45m
1 stop
Frontier Logo
2:19 pm - 11:59 pm
PIT
-
STL
10h 40m
1 stop
$200Frontier
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
8:30 am - 2:02 pm
STL
-
PIT
4h 32m
1 stop
United Airlines Logo
6:10 am - 10:12 am
PIT
-
STL
5h 02m
1 stop
$201United Airlines
Tue, Mar 3 - Wed, Mar 11
United Airlines Logo
6:45 pm - 11:51 pm
STL
-
PIT
4h 06m
1 stop
United Airlines Logo
7:00 am - 10:36 am
PIT
-
STL
4h 36m
1 stop
$205United Airlines
Fri, Feb 20 - Sun, Feb 22
Southwest Logo
5:35 am - 10:15 am
STL
-
PIT
3h 40m
1 stop
Southwest Logo
7:15 am - 8:05 am
PIT
-
STL
1h 50mnonstop
$233Southwest
Tue, Apr 7 - Sat, Apr 11
Multiple Airlines Logo
3:49 pm - 11:59 pm
STL
-
PIT
31h 10m
2 stops
Multiple Airlines Logo
5:45 am - 11:19 pm
PIT
-
STL
18h 34m
1 stop
$235Multiple Airlines
Tue, Mar 3 - Wed, Mar 11
United Airlines Logo
6:00 am - 1:14 pm
STL
-
PIT
6h 14m
1 stop
United Airlines Logo
6:11 pm - 9:11 pm
PIT
-
STL
4h 00m
1 stop
$237United Airlines
Fri, May 29 - Fri, May 29
American Airlines Logo
6:00 am - 1:43 pm
STL
-
PIT
6h 43m
1 stop
American Airlines Logo
3:32 pm - 8:16 pm
PIT
-
STL
5h 44m
1 stop
$241American Airlines
Thu, Feb 19 - Mon, Feb 23

American Airlines flights from St. Louis to Pittsburgh

Our best American Airlines deals on St. Louis to Pittsburgh flight tickets
American Airlines
Feb 19
STL7:05 amLambert-St Louis
6h 39m
1 stop
PIT2:44 pmPittsburgh
Feb 23
PIT3:32 pmPittsburgh
5h 44m
1 stop
STL8:16 pmLambert-St Louis
$241
American Airlines
Mar 9
STL6:33 pmLambert-St Louis
5h 18m
1 stop
PIT12:51 amPittsburgh
Mar 12
PIT6:30 amPittsburgh
4h 33m
1 stop
STL10:03 amLambert-St Louis
$258
American Airlines
Mar 5
STL6:57 pmLambert-St Louis
4h 39m
1 stop
PIT12:36 amPittsburgh
Mar 9
PIT7:05 pmPittsburgh
5h 39m
1 stop
STL11:44 pmLambert-St Louis
$273

United Airlines flights from St. Louis to Pittsburgh

Our best United Airlines deals on St. Louis to Pittsburgh flight tickets
United Airlines
Apr 7
STL10:00 amLambert-St Louis
6h 44m
1 stop
PIT5:44 pmPittsburgh
Apr 11
PIT6:10 amPittsburgh
5h 21m
1 stop
STL10:31 amLambert-St Louis
$195
United Airlines
Mar 3
STL8:30 amLambert-St Louis
4h 32m
1 stop
PIT2:02 pmPittsburgh
Mar 11
PIT6:10 amPittsburgh
5h 02m
1 stop
STL10:12 amLambert-St Louis
$201
United Airlines
Feb 20
STL6:45 pmLambert-St Louis
4h 06m
1 stop
PIT11:51 pmPittsburgh
Feb 22
PIT7:00 amPittsburgh
4h 36m
1 stop
STL10:36 amLambert-St Louis
$205

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 February 8, 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

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 4/1

5:59 pm-10:46 pm

1 stop3h 47m

Pittsburgh

Sat 4/4

2:07 pm-4:40 pm

1 stop3h 33m

$187

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 4/7

10:00 am-5:44 pm

1 stop6h 44m

Pittsburgh

Sat 4/11

6:10 am-10:31 am

1 stop5h 21m

$195

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 3/10

5:59 pm-10:46 pm

1 stop3h 47m

Pittsburgh

Sun 3/15

6:30 am-9:46 am

1 stop4h 16m

$197

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 2/19

3:49 pm-10:34 am

1 stop17h 45m

Pittsburgh

Mon 2/23

2:19 pm-11:59 pm

1 stop10h 40m

$200

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 3/3

8:30 am-2:02 pm

1 stop4h 32m

Pittsburgh

Wed 3/11

6:10 am-10:12 am

1 stop5h 02m

$201

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 2/20

6:45 pm-11:51 pm

1 stop4h 06m

Pittsburgh

Sun 2/22

7:00 am-10:36 am

1 stop4h 36m

$205

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 4/7

5:35 am-10:15 am

1 stop3h 40m

Pittsburgh

Sat 4/11

7:15 am-8:05 am

Nonstop1h 50m

$233

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 3/3

3:49 pm-11:59 pm

2 stops31h 10m

Pittsburgh

Wed 3/11

5:45 am-11:19 pm

1 stop18h 34m

$235

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 5/29

6:00 am-1:14 pm

1 stop6h 14m

Pittsburgh

Fri 5/29

6:11 pm-9:11 pm

1 stop4h 00m

$237

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 2/19

6:00 am-1:43 pm

1 stop6h 43m

Pittsburgh

Mon 2/23

3:32 pm-8:16 pm

1 stop5h 44m

$241

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 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 May is another great option to travel to Pittsburgh, with average flight prices from St. Louis averaging around $302.

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 Wednesday when prices can be found for as low as $277. 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 Monday will generally be more expensive and average around $631. 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 $311. 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

How far in advance should I book a flight to Pittsburgh?

You are more likely to see cheaper flights to Pittsburgh from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Pittsburgh for around $352 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Pittsburgh from St. Louis for as low as $242 on momondo.

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 February 2026, prices for St. Louis to Pittsburgh flights are approximately 111% 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

$289

Fastest flight time

1h 35m

Direct flights

Mon, Wed, Thu, Fri, Sat and Sun

Airports in Pittsburgh

1 airport
The best flight deal from St. Louis to Pittsburgh found on momondo in the last 72 hours is $289
The fastest flight from St. Louis to Pittsburgh takes 1h 35m
Direct flights go from St. Louis to Pittsburgh on Monday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport in Pittsburgh. From St. Louis there are direct flights to Pittsburgh (PIT).
Search flight deals

  • 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
7.2
11,249 reviews
Search American Airlines flights
SouthwestPriceFrom $241Free CancellationRating
8.0
4,280 reviews
Search Southwest flights
DeltaPriceFrom $252Free CancellationRating
7.9
8,172 reviews
Search Delta flights

  • Southwest Flights From St. Louis to Pittsburgh

    Southwest flight deals from St. Louis to Pittsburgh start from $241 round-trip. Over the 5 Southwest flights for this route in a normal week, average airfare is usually $368 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
Canonsburg
Butler
Triadelphia
New Castle
West Mifflin
Belle Vernon
Steubenville
Moon
Coraopolis
Wexford
Mars
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.

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