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Cheap flights from St. Louis to Pittsburgh from $89

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 11/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Pittsburgh (STL-PIT)

Cheap round-trip flights

American Airlines Logo
6:10 am - 4:52 pmSTL-PIT
9h 42m1 stop
American Airlines Logo
12:35 pm - 9:53 pmPIT-STL
10h 18m1 stop
$171American Airlines
Find Deal
Sat, Sep 20 - Tue, Sep 23
American Airlines Logo
7:23 am - 4:53 pmSTL-PIT
8h 30m1 stop
American Airlines Logo
5:23 pm - 11:48 pmPIT-STL
7h 25m1 stop
$172American Airlines
Find Deal
Thu, Sep 4 - Mon, Sep 8
American Airlines Logo
6:10 am - 4:53 pmSTL-PIT
9h 43m1 stop
American Airlines Logo
5:13 pm - 11:07 pmPIT-STL
6h 54m1 stop
$174American Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 17
Southwest Logo
6:40 pm - 9:15 pmSTL-PIT
1h 35mnonstop
Southwest Logo
9:10 pm - 12:05 amPIT-STL
3h 55m1 stop
$183Southwest
Find Deal
Wed, Oct 15 - Sun, Oct 19
Southwest Logo
8:25 am - 11:00 amSTL-PIT
1h 35mnonstop
Southwest Logo
4:15 pm - 7:20 pmPIT-STL
4h 05m1 stop
$197Southwest
Find Deal
Thu, Sep 4 - Mon, Sep 8
Logo
10:35 am - 6:58 pmSTL-PIT
7h 23m1 stop
Logo
3:50 pm - 3:04 pmPIT-STL
24h 14m2 stops
$253
Find Deal
Thu, Sep 18 - Sun, Sep 21
Logo
11:32 am - 11:35 pmSTL-PIT
11h 03m2 stops
Logo
6:45 am - 5:45 pmPIT-STL
12h 00m1 stop
$265
Find Deal
Fri, Oct 24 - Sat, Oct 25
United Airlines Logo
11:30 am - 6:16 pmSTL-PIT
5h 46m1 stop
United Airlines Logo
7:05 am - 10:40 amPIT-STL
4h 35m1 stop
$294United Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 7
United Airlines Logo
5:30 pm - 11:44 pmSTL-PIT
5h 14m1 stop
United Airlines Logo
10:49 am - 7:27 pmPIT-STL
9h 38m2 stops
$379United Airlines
Find Deal
Sat, Sep 20 - Tue, Sep 23
Delta Logo
6:00 am - 12:38 pmSTL-PIT
5h 38m1 stop
Delta Logo
6:20 am - 9:32 amPIT-STL
4h 12m1 stop
$380Delta
Find Deal
Thu, Aug 28 - Sat, Aug 30

American Airlines flights from St. Louis to Pittsburgh

Our best American Airlines deals on St. Louis to Pittsburgh flight tickets
American Airlines
Sep 20
STL6:10 amLambert-St Louis
9h 42m
1 stop
PIT4:52 pmPittsburgh
Sep 23
PIT12:35 pmPittsburgh
10h 18m
1 stop
STL9:53 pmLambert-St Louis
$171
Find similar
American Airlines
Sep 4
STL7:23 amLambert-St Louis
8h 30m
1 stop
PIT4:53 pmPittsburgh
Sep 8
PIT5:23 pmPittsburgh
7h 25m
1 stop
STL11:48 pmLambert-St Louis
$172
Find similar
American Airlines
Sep 10
STL6:10 amLambert-St Louis
9h 43m
1 stop
PIT4:53 pmPittsburgh
Sep 17
PIT5:13 pmPittsburgh
6h 54m
1 stop
STL11:07 pmLambert-St Louis
$174
Find similar

Southwest flights from St. Louis to Pittsburgh

Our best Southwest deals on St. Louis to Pittsburgh flight tickets
Southwest
Oct 15
STL6:40 pmLambert-St Louis
1h 35m
PIT9:15 pmPittsburgh
Oct 19
PIT9:10 pmPittsburgh
3h 55m
1 stop
STL12:05 amLambert-St Louis
$183
Find similar
Southwest
Sep 4
STL8:25 amLambert-St Louis
1h 35m
PIT11:00 amPittsburgh
Sep 8
PIT4:15 pmPittsburgh
4h 05m
1 stop
STL7:20 pmLambert-St Louis
$197
Find similar
Southwest
Oct 15
STL5:05 pmLambert-St Louis
5h 00m
1 stop
PIT11:05 pmPittsburgh
Oct 19
PIT9:10 pmPittsburgh
3h 55m
1 stop
STL12:05 amLambert-St Louis
$207
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 August 14, 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

Sat 9/20

6:10 am-4:52 pm

1 stop9h 42m

Pittsburgh

Tue 9/23

12:35 pm-9:53 pm

1 stop10h 18m

$171

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 9/4

7:23 am-4:53 pm

1 stop8h 30m

Pittsburgh

Mon 9/8

5:23 pm-11:48 pm

1 stop7h 25m

$172

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 9/10

6:10 am-4:53 pm

1 stop9h 43m

Pittsburgh

Wed 9/17

5:13 pm-11:07 pm

1 stop6h 54m

$174

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 10/15

6:40 pm-9:15 pm

Nonstop1h 35m

Pittsburgh

Sun 10/19

9:10 pm-12:05 am

1 stop3h 55m

$183

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 9/4

8:25 am-11:00 am

Nonstop1h 35m

Pittsburgh

Mon 9/8

4:15 pm-7:20 pm

1 stop4h 05m

$197

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 9/18

10:35 am-6:58 pm

1 stop7h 23m

Pittsburgh

Sun 9/21

3:50 pm-3:04 pm

2 stops24h 14m

$253

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 10/24

11:32 am-11:35 pm

2 stops11h 03m

Pittsburgh

Sat 10/25

6:45 am-5:45 pm

1 stop12h 00m

$265

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Fri 9/5

11:30 am-6:16 pm

1 stop5h 46m

Pittsburgh

Sun 9/7

7:05 am-10:40 am

1 stop4h 35m

$294

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Sat 9/20

5:30 pm-11:44 pm

1 stop5h 14m

Pittsburgh

Tue 9/23

10:49 am-7:27 pm

2 stops9h 38m

$379

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Thu 8/28

6:00 am-12:38 pm

1 stop5h 38m

Pittsburgh

Sat 8/30

6:20 am-9:32 am

1 stop4h 12m

$380

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 $296.

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 $324. 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 $313. 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 $357 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 are 1 cabin classes 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 10% 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 August 2025, prices for St. Louis to Pittsburgh flights are approximately 105% 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

$89

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 $89. The best round-trip flight deal from St. Louis to Pittsburgh found on momondo in the last 72 hours is $171.
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
American AirlinesPriceFrom $247Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $252Free CancellationRating
8.0
7,980 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights

  • Southwest Flights From St. Louis to Pittsburgh

    Southwest flight deals from St. Louis to Pittsburgh start from $254 round-trip. Over the 5 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
West Mifflin
New Castle
Steubenville
Triadelphia
Belle Vernon
Moon
Canonsburg
Coraopolis
Mars
Wexford
Freeport
Cadiz
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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