How many flights depart from St. Louis to Pittsburgh on average per week?

The number of flights available between St. Louis and Pittsburgh is 12 per week as of March 2026. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

What airlines fly to Pittsburgh?

Southwest, American Airlines and Delta are the top three most popular airlines that fly to Pittsburgh from St. Louis according to our data. Southwest is the first choice among our users, with 66% of people opting to fly with this airline when traveling to Pittsburgh. Keep in mind that there are 3 different airlines that fly to Pittsburgh on a routine basis, so you have a few additional options to choose from.

How many flights depart from St. Louis to Pittsburgh on average per day?

As of March 2026, 1 flights take off from St. Louis and land in Pittsburgh each day. The most common flight departure time for this route is 7:00PM, with 66% of daily flights taking off in the evening.

Which layover airport offers the lowest fares from St. Louis to Pittsburgh?

Flights via Chicago (ORD) offer the lowest average round-trip price of $321.

Which layover airport has the shortest travel time from St. Louis to Pittsburgh?

Flights connecting via Chicago (MDW) have the shortest average one-way travel time: 3h 15m.

Which airport is the most popular layover for flights between St. Louis and Pittsburgh?

Chicago (ORD) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

What is the cheapest airline that flies from Lambert-St Louis to Pittsburgh?

Southwest, Delta, and United Airlines are the most popular carriers operating from Lambert-St Louis to Pittsburgh

Which layover airport has the shortest connection time from St. Louis to Pittsburgh?

Nashville (BNA) has the shortest average layover time for this route: 0h 48m.

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?

The number of operators available for flights from Lambert-St Louis Airport to Pittsburgh Airport is 3 as of March 2026.

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.

$119 Cheap Flights from St. Louis to Pittsburgh in 2026

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Find the cheapest flights from St. Louis to Pittsburgh

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:15 am - 12:55 pm

STL

PIT

1h 40mnonstop

6:50 am - 7:40 am

PIT

STL

1h 50mnonstop

$237Southwest

Tue, Apr 21 - Tue, Apr 28

8:45 am - 4:25 pm

STL

PIT

6h 40m

1 stop

8:05 pm - 8:55 pm

PIT

STL

1h 50mnonstop

$241Southwest

Sat, Apr 18 - Mon, Apr 20

6:20 am - 11:30 am

STL

PIT

4h 10m

1 stop

1:35 pm - 6:55 pm

PIT

STL

6h 20m

1 stop

$246Southwest

Sat, Apr 18 - Mon, Apr 20

6:00 am - 12:37 pm

STL

PIT

5h 37m

1 stop

6:00 am - 11:56 am

PIT

STL

6h 56m

1 stop

$247Delta

Wed, Apr 8 - Wed, Apr 15

5:35 pm - 11:00 pm

STL

PIT

4h 25m

1 stop

8:40 am - 12:55 pm

PIT

STL

5h 15m

1 stop

$249Southwest

Sat, May 16 - Thu, May 21

10:15 am - 12:55 pm

STL

PIT

1h 40mnonstop

6:05 am - 1:00 pm

PIT

STL

7h 55m

2 stops

$252Southwest

Tue, Apr 21 - Tue, Apr 28

6:14 am - 1:41 pm

STL

PIT

6h 27m

1 stop

7:31 am - 11:35 am

PIT

STL

5h 04m

1 stop

$253American Airlines

Sat, Apr 4 - Sun, Apr 5

6:35 am - 4:20 pm

STL

PIT

8h 45m

1 stop

6:05 am - 1:00 pm

PIT

STL

7h 55m

2 stops

$262Southwest

Tue, Apr 21 - Tue, Apr 28

6:45 pm - 9:20 pm

STL

PIT

1h 35mnonstop

8:40 pm - 12:15 am

PIT

STL

4h 35m

1 stop

$266Southwest

Tue, Mar 31 - Sun, Apr 5

10:50 am - 5:19 pm

STL

PIT

5h 29m

1 stop

7:35 pm - 11:58 pm

PIT

STL

5h 23m

1 stop

$271Delta

Tue, Mar 31 - Sun, Apr 5

Southwest flights from St. Louis to Pittsburgh

Our best Southwest deals on St. Louis to Pittsburgh flight tickets

Southwest

Apr 21

STL10:15 amLambert-St Louis

1h 40m

PIT12:55 pmPittsburgh

Apr 28

PIT6:50 amPittsburgh

1h 50m

STL7:40 amLambert-St Louis

$237

Southwest

Apr 18

STL8:45 amLambert-St Louis

6h 40m

1 stop

PIT4:25 pmPittsburgh

Apr 20

PIT8:05 pmPittsburgh

1h 50m

STL8:55 pmLambert-St Louis

$241

Southwest

Apr 18

STL6:20 amLambert-St Louis

4h 10m

1 stop

PIT11:30 amPittsburgh

Apr 20

PIT1:35 pmPittsburgh

6h 20m

1 stop

STL6:55 pmLambert-St Louis

$246

American Airlines flights from St. Louis to Pittsburgh

Our best American Airlines deals on St. Louis to Pittsburgh flight tickets

American Airlines

Apr 4

STL6:14 amLambert-St Louis

6h 27m

1 stop

PIT1:41 pmPittsburgh

Apr 5

PIT7:31 amPittsburgh

5h 04m

1 stop

STL11:35 amLambert-St Louis

$253

American Airlines

Jun 4

STL7:30 amLambert-St Louis

6h 10m

1 stop

PIT2:40 pmPittsburgh

Jun 8

PIT8:38 pmPittsburgh

4h 16m

1 stop

STL11:54 pmLambert-St Louis

$311

American Airlines

Mar 12

STL6:00 amLambert-St Louis

5h 59m

1 stop

PIT12:59 pmPittsburgh

Mar 14

PIT1:26 pmPittsburgh

5h 41m

1 stop

STL6:07 pmLambert-St Louis

$351

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 4/21

10:15 am-12:55 pm

Nonstop1h 40m

Pittsburgh

Tue 4/28

6:50 am-7:40 am

Nonstop1h 50m

$237

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 4/18

8:45 am-4:25 pm

1 stop6h 40m

Pittsburgh

Mon 4/20

8:05 pm-8:55 pm

Nonstop1h 50m

$241

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 4/18

6:20 am-11:30 am

1 stop4h 10m

Pittsburgh

Mon 4/20

1:35 pm-6:55 pm

1 stop6h 20m

$246

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 4/8

6:00 am-12:37 pm

1 stop5h 37m

Pittsburgh

Wed 4/15

6:00 am-11:56 am

1 stop6h 56m

$247

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 5/16

5:35 pm-11:00 pm

1 stop4h 25m

Pittsburgh

Thu 5/21

8:40 am-12:55 pm

1 stop5h 15m

$249

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 4/21

10:15 am-12:55 pm

Nonstop1h 40m

Pittsburgh

Tue 4/28

6:05 am-1:00 pm

2 stops7h 55m

$252

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 4/4

6:14 am-1:41 pm

1 stop6h 27m

Pittsburgh

Sun 4/5

7:31 am-11:35 am

1 stop5h 04m

$253

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 4/21

6:35 am-4:20 pm

1 stop8h 45m

Pittsburgh

Tue 4/28

6:05 am-1:00 pm

2 stops7h 55m

$262

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 3/31

6:45 pm-9:20 pm

Nonstop1h 35m

Pittsburgh

Sun 4/5

8:40 pm-12:15 am

1 stop4h 35m

$266

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 3/31

10:50 am-5:19 pm

1 stop5h 29m

Pittsburgh

Sun 4/5

7:35 pm-11:58 pm

1 stop5h 23m

$271

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

Other information

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 $316.

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 $288. 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 $593. 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 $301. 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 March 2026, prices for St. Louis to Pittsburgh flights are approximately 36% cheaper 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	Every day
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 every day.

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?
The number of operators available for flights from Lambert-St Louis Airport to Pittsburgh Airport is 3 as of March 2026.
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?
Based on momondo bookings for flights between St. Louis and Pittsburgh, the leading plane model is Boeing 737 MAX 8, making up 33.33% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 16.67%, Embraer 175 with 12.50%, and Airbus A321neo with 8.33%.
What is the most popular airline from St. Louis to Pittsburgh?
Based on momondo bookings for flights between St. Louis and Pittsburgh, the leading airline is Southwest, making up 72% of the total bookings. Other popular airlines include American Airlines with 19% and Delta with 9%.

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 Airlines	PriceFrom $208	Free Cancellation	Rating 7.1 11,435 reviews	Search American Airlines flights
Southwest	PriceFrom $235	Free Cancellation	Rating 8.0 4,319 reviews	Search Southwest flights
Delta	PriceFrom $252	Free Cancellation	Rating 7.9 8,286 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 12 Southwest flights for this route in a normal week, average airfare is usually $366 round-trip - but some users have found much cheaper deals with momondo.

Washington

Monroeville

Wheeling

Canonsburg

Butler

New Castle

Triadelphia

West Mifflin

Belle Vernon

Steubenville

Coraopolis

Moon

Mars

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.