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Cheap flights from St. Louis to Pittsburgh from $93

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 1/20. 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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Cheap round-trip flights

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American Airlines Logo
9:08 am - 5:09 pmSTL-PIT
7h 01m1 stop
American Airlines Logo
8:15 am - 4:23 pmPIT-STL
9h 08m1 stop
$183American Airlines
Find Deal
Thu, Dec 25 - Thu, Jan 1
Delta Logo
7:10 am - 12:43 pmSTL-PIT
4h 33m1 stop
Delta Logo
6:00 am - 11:05 amPIT-STL
6h 05m1 stop
$207Delta
Find Deal
Tue, Jan 13 - Wed, Jan 14
Multiple Airlines Logo
11:51 am - 9:58 amSTL-PIT
21h 07m1 stop
Multiple Airlines Logo
5:32 am - 10:33 pmPIT-STL
18h 01m1 stop
$211Multiple Airlines
Find Deal
Tue, Jan 6 - Thu, Jan 8
American Airlines Logo
7:00 am - 2:41 pmSTL-PIT
6h 41m1 stop
American Airlines Logo
8:10 am - 6:14 pmPIT-STL
11h 04m1 stop
$213American Airlines
Find Deal
Thu, Jan 15 - Sun, Jan 18
Delta Logo
12:00 pm - 7:51 pmSTL-PIT
6h 51m1 stop
Delta Logo
2:07 pm - 4:53 pmPIT-STL
3h 46m1 stop
$225Delta
Find Deal
Tue, Jan 6 - Sat, Jan 10
Multiple Airlines Logo
11:51 am - 9:58 amSTL-PIT
21h 07m1 stop
Multiple Airlines Logo
5:50 pm - 2:48 pmPIT-STL
21h 58m2 stops
$232Multiple Airlines
Find Deal
Tue, Jan 6 - Sat, Jan 10
Multiple Airlines Logo
5:11 pm - 11:07 pmSTL-PIT
28h 56m1 stop
Multiple Airlines Logo
10:45 am - 10:33 pmPIT-STL
12h 48m1 stop
$236Multiple Airlines
Find Deal
Thu, Jan 8 - Mon, Jan 12
Multiple Airlines Logo
11:51 am - 9:58 amSTL-PIT
21h 07m1 stop
Multiple Airlines Logo
5:32 am - 10:33 pmPIT-STL
18h 01m1 stop
$239Multiple Airlines
Find Deal
Tue, Jan 6 - Fri, Jan 9
Multiple Airlines Logo
11:51 am - 9:58 amSTL-PIT
21h 07m1 stop
Multiple Airlines Logo
5:50 pm - 2:48 pmPIT-STL
21h 58m2 stops
$242Multiple Airlines
Find Deal
Tue, Jan 6 - Thu, Jan 8
Delta Logo
6:35 am - 1:27 pmSTL-PIT
5h 52m1 stop
Delta Logo
6:15 pm - 11:39 pmPIT-STL
6h 24m1 stop
$243Delta
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Thu, Jan 8 - Mon, Jan 12

United Airlines flights from St. Louis to Pittsburgh

Our best United Airlines deals on St. Louis to Pittsburgh flight tickets
United Airlines
Dec 1
STL10:00 amLambert-St Louis
5h 50m
1 stop
PIT4:50 pmPittsburgh
Dec 15
PIT5:51 pmPittsburgh
5h 54m
1 stop
STL10:45 pmLambert-St Louis
$483
Find similar
United Airlines
Dec 8
STL5:44 pmLambert-St Louis
4h 50m
1 stop
PIT11:34 pmPittsburgh
Dec 12
PIT2:10 pmPittsburgh
3h 53m
1 stop
STL5:03 pmLambert-St Louis
$491
Find similar
United Airlines
Nov 25
STL10:00 amLambert-St Louis
5h 45m
1 stop
PIT4:45 pmPittsburgh
Dec 2
PIT2:10 pmPittsburgh
3h 53m
1 stop
STL5:03 pmLambert-St Louis
$503
Find similar

American Airlines flights from St. Louis to Pittsburgh

Our best American Airlines deals on St. Louis to Pittsburgh flight tickets
American Airlines
Dec 25
STL9:08 amLambert-St Louis
7h 01m
1 stop
PIT5:09 pmPittsburgh
Jan 1
PIT8:15 amPittsburgh
9h 08m
1 stop
STL4:23 pmLambert-St Louis
$183
Find similar
American Airlines
Jan 15
STL7:00 amLambert-St Louis
6h 41m
1 stop
PIT2:41 pmPittsburgh
Jan 18
PIT8:10 amPittsburgh
11h 04m
1 stop
STL6:14 pmLambert-St Louis
$213
Find similar
American Airlines
Feb 19
STL6:00 amLambert-St Louis
10h 54m
1 stop
PIT5:54 pmPittsburgh
Feb 20
PIT11:43 amPittsburgh
12h 45m
1 stop
STL11:28 pmLambert-St Louis
$254
Find similar

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 November 24, 2025.
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

Thu 12/25

9:08 am-5:09 pm

1 stop7h 01m

Pittsburgh

Thu 1/1

8:15 am-4:23 pm

1 stop9h 08m

$183

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 1/13

7:10 am-12:43 pm

1 stop4h 33m

Pittsburgh

Wed 1/14

6:00 am-11:05 am

1 stop6h 05m

$207

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 1/6

11:51 am-9:58 am

1 stop21h 07m

Pittsburgh

Thu 1/8

5:32 am-10:33 pm

1 stop18h 01m

$211

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 1/15

7:00 am-2:41 pm

1 stop6h 41m

Pittsburgh

Sun 1/18

8:10 am-6:14 pm

1 stop11h 04m

$213

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 1/6

12:00 pm-7:51 pm

1 stop6h 51m

Pittsburgh

Sat 1/10

2:07 pm-4:53 pm

1 stop3h 46m

$225

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 1/6

11:51 am-9:58 am

1 stop21h 07m

Pittsburgh

Sat 1/10

5:50 pm-2:48 pm

2 stops21h 58m

$232

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 1/8

5:11 pm-11:07 pm

1 stop28h 56m

Pittsburgh

Mon 1/12

10:45 am-10:33 pm

1 stop12h 48m

$236

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 1/6

11:51 am-9:58 am

1 stop21h 07m

Pittsburgh

Fri 1/9

5:32 am-10:33 pm

1 stop18h 01m

$239

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 1/6

11:51 am-9:58 am

1 stop21h 07m

Pittsburgh

Thu 1/8

5:50 pm-2:48 pm

2 stops21h 58m

$242

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 1/8

6:35 am-1:27 pm

1 stop5h 52m

Pittsburgh

Mon 1/12

6:15 pm-11:39 pm

1 stop6h 24m

$243

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, May 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 $294. 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 $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 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 $294. 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 $362 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 $175 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 34% 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 November 2025, prices for St. Louis to Pittsburgh flights are approximately 48% 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

$169

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 $169. The best round-trip flight deal from St. Louis to Pittsburgh found on momondo in the last 72 hours is $263.
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 near Pittsburgh: 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
SouthwestPriceFrom $248Free CancellationRating
8.0
4,252 reviews
Search Southwest flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
9,044 reviews
Search United Airlines flights
DeltaPriceFrom $258Free CancellationRating
7.9
7,998 reviews
Search Delta flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights

  • Southwest Flights From St. Louis to Pittsburgh

    Southwest flight deals from St. Louis to Pittsburgh start from $248 round-trip. Over the 4 Southwest flights for this route in a normal week, average airfare is usually $367 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
Belle Vernon
Triadelphia
New Castle
West Mifflin
Steubenville
Moon
Coraopolis
Wexford
Mars
Cadiz
Freeport
Chester
Bridgeport

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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