Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Pittsburgh from $78

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 2/18. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Pittsburgh

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:22 pm - 9:40 am
STL
-
PIT
36h 18m
2 stops
Multiple Airlines Logo
5:32 am - 11:33 pm
PIT
-
STL
19h 01m
1 stop
$175Multiple Airlines
Mon, Feb 2 - Mon, Feb 9
Multiple Airlines Logo
8:22 pm - 11:44 pm
STL
-
PIT
26h 22m
2 stops
Multiple Airlines Logo
5:32 am - 11:33 pm
PIT
-
STL
19h 01m
1 stop
$177Multiple Airlines
Wed, Feb 4 - Mon, Feb 9
Multiple Airlines Logo
5:42 pm - 9:40 am
STL
-
PIT
38h 58m
2 stops
Multiple Airlines Logo
5:32 am - 11:33 pm
PIT
-
STL
19h 01m
1 stop
$189Multiple Airlines
Tue, Feb 3 - Mon, Feb 9
Multiple Airlines Logo
3:49 pm - 11:59 pm
STL
-
PIT
31h 10m
2 stops
Multiple Airlines Logo
5:45 pm - 10:27 pm
PIT
-
STL
29h 42m
1 stop
$193Multiple Airlines
Mon, Feb 16 - Mon, Feb 23
Multiple Airlines Logo
5:42 pm - 11:54 pm
STL
-
PIT
29h 12m
1 stop
Multiple Airlines Logo
6:00 am - 6:51 am
PIT
-
STL
25h 51m
2 stops
$202Multiple Airlines
Tue, Feb 3 - Tue, Feb 10
Multiple Airlines Logo
5:42 pm - 11:54 pm
STL
-
PIT
29h 12m
1 stop
Multiple Airlines Logo
5:32 am - 11:33 pm
PIT
-
STL
19h 01m
1 stop
$203Multiple Airlines
Tue, Feb 3 - Mon, Feb 9
Southwest Logo
3:05 pm - 10:35 pm
STL
-
PIT
6h 30m
1 stop
Southwest Logo
1:25 pm - 5:55 pm
PIT
-
STL
5h 30m
1 stop
$213Southwest
Wed, Apr 1 - Wed, Apr 8
Multiple Airlines Logo
8:22 pm - 9:40 am
STL
-
PIT
36h 18m
2 stops
Multiple Airlines Logo
10:45 am - 10:27 pm
PIT
-
STL
12h 42m
1 stop
$215Multiple Airlines
Mon, Feb 2 - Tue, Feb 10
Multiple Airlines Logo
8:22 pm - 11:44 pm
STL
-
PIT
26h 22m
2 stops
Multiple Airlines Logo
10:45 am - 10:27 pm
PIT
-
STL
12h 42m
1 stop
$217Multiple Airlines
Wed, Feb 4 - Tue, Feb 10
Southwest Logo
6:10 am - 3:25 pm
STL
-
PIT
8h 15m
2 stops
Southwest Logo
1:25 pm - 5:55 pm
PIT
-
STL
5h 30m
1 stop
$218Southwest
Wed, Apr 1 - Wed, Apr 8

Southwest flights from St. Louis to Pittsburgh

Our best Southwest deals on St. Louis to Pittsburgh flight tickets
Southwest
Apr 1
STL3:05 pmLambert-St Louis
6h 30m
1 stop
PIT10:35 pmPittsburgh
Apr 8
PIT1:25 pmPittsburgh
5h 30m
1 stop
STL5:55 pmLambert-St Louis
$213
Southwest
Apr 1
STL6:10 amLambert-St Louis
8h 15m
2 stops
PIT3:25 pmPittsburgh
Apr 8
PIT1:25 pmPittsburgh
5h 30m
1 stop
STL5:55 pmLambert-St Louis
$218
Southwest
Apr 8
STL3:55 pmLambert-St Louis
6h 25m
1 stop
PIT11:20 pmPittsburgh
Apr 15
PIT6:50 amPittsburgh
1h 50m
STL7:40 amLambert-St Louis
$241

American Airlines flights from St. Louis to Pittsburgh

Our best American Airlines deals on St. Louis to Pittsburgh flight tickets
American Airlines
Feb 16
STL2:19 pmLambert-St Louis
5h 09m
1 stop
PIT8:28 pmPittsburgh
Feb 23
PIT3:32 pmPittsburgh
5h 44m
1 stop
STL8:16 pmLambert-St Louis
$261
American Airlines
Feb 3
STL6:00 amLambert-St Louis
4h 13m
1 stop
PIT11:13 amPittsburgh
Feb 7
PIT10:27 amPittsburgh
7h 34m
1 stop
STL5:01 pmLambert-St Louis
$331
American Airlines
Jan 24
STL10:17 amLambert-St Louis
7h 07m
1 stop
PIT6:24 pmPittsburgh
Jan 27
PIT3:25 pmPittsburgh
6h 07m
1 stop
STL8:32 pmLambert-St Louis
$351

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 January 21, 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

Mon 2/2

8:22 pm-9:40 am

2 stops36h 18m

Pittsburgh

Mon 2/9

5:32 am-11:33 pm

1 stop19h 01m

$175

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 2/4

8:22 pm-11:44 pm

2 stops26h 22m

Pittsburgh

Mon 2/9

5:32 am-11:33 pm

1 stop19h 01m

$177

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 2/3

5:42 pm-9:40 am

2 stops38h 58m

Pittsburgh

Mon 2/9

5:32 am-11:33 pm

1 stop19h 01m

$189

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Mon 2/16

3:49 pm-11:59 pm

2 stops31h 10m

Pittsburgh

Mon 2/23

5:45 pm-10:27 pm

1 stop29h 42m

$193

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 2/3

5:42 pm-11:54 pm

1 stop29h 12m

Pittsburgh

Tue 2/10

6:00 am-6:51 am

2 stops25h 51m

$202

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Tue 2/3

5:42 pm-11:54 pm

1 stop29h 12m

Pittsburgh

Mon 2/9

5:32 am-11:33 pm

1 stop19h 01m

$203

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 4/1

3:05 pm-10:35 pm

1 stop6h 30m

Pittsburgh

Wed 4/8

1:25 pm-5:55 pm

1 stop5h 30m

$213

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Mon 2/2

8:22 pm-9:40 am

2 stops36h 18m

Pittsburgh

Tue 2/10

10:45 am-10:27 pm

1 stop12h 42m

$215

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 2/4

8:22 pm-11:44 pm

2 stops26h 22m

Pittsburgh

Tue 2/10

10:45 am-10:27 pm

1 stop12h 42m

$217

St. LouisPittsburgh

STL - PIT

STLPIT

Lambert-St Louis

Wed 4/1

6:10 am-3:25 pm

2 stops8h 15m

Pittsburgh

Wed 4/8

1:25 pm-5:55 pm

1 stop5h 30m

$218

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 May is another great option to travel to Pittsburgh, with average flight prices from St. Louis averaging around $294.

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 $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 $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 January 2026, prices for St. Louis to Pittsburgh flights are approximately 35% 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

$349

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 $349
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?

  • 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
11,174 reviews
Search American Airlines flights
SouthwestPriceFrom $241Free CancellationRating
8.0
4,266 reviews
Search Southwest flights
DeltaPriceFrom $252Free CancellationRating
7.9
8,089 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 7 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.

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
Coraopolis
Moon
Wexford
Mars
Freeport
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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 2/20
Fri 2/27
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States