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Cheap flights from St. Louis to Pittsburgh from $91

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 10/21. 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

American Airlines Logo
6:00 am - 2:51 pmSTL-PIT
7h 51m1 stop
American Airlines Logo
8:23 am - 3:49 pmPIT-STL
8h 26m1 stop
$171American Airlines
Find Deal
Thu, Aug 21 - Tue, Aug 26
American Airlines Logo
6:06 am - 2:51 pmSTL-PIT
7h 45m1 stop
American Airlines Logo
2:40 pm - 9:02 pmPIT-STL
7h 22m1 stop
$194American Airlines
Find Deal
Wed, Aug 6 - Mon, Aug 11
Southwest Logo
8:25 am - 11:00 amSTL-PIT
1h 35mnonstop
Southwest Logo
1:05 pm - 1:50 pmPIT-STL
1h 45mnonstop
$197Southwest
Find Deal
Thu, Aug 21 - Tue, Aug 26
Spirit Airlines Logo
5:26 pm - 11:15 pmSTL-PIT
28h 49m1 stop
Spirit Airlines Logo
6:30 am - 9:52 amPIT-STL
28h 22m2 stops
$205Spirit Airlines
Find Deal
Tue, Jul 15 - Thu, Jul 17
Southwest Logo
8:25 am - 11:00 amSTL-PIT
1h 35mnonstop
Southwest Logo
7:30 pm - 10:05 pmPIT-STL
3h 35m1 stop
$207Southwest
Find Deal
Thu, Aug 21 - Tue, Aug 26
Spirit Airlines Logo
5:26 pm - 11:15 pmSTL-PIT
28h 49m1 stop
Spirit Airlines Logo
6:20 am - 9:52 amPIT-STL
28h 32m3 stops
$225Spirit Airlines
Find Deal
Tue, Jul 15 - Thu, Jul 17
Delta Logo
5:11 pm - 11:10 pmSTL-PIT
4h 59m1 stop
Delta Logo
5:57 pm - 10:02 pmPIT-STL
5h 05m1 stop
$235Delta
Find Deal
Mon, Sep 1 - Sat, Sep 6
Delta Logo
6:40 am - 11:13 amSTL-PIT
3h 33m1 stop
Delta Logo
6:31 pm - 11:53 pmPIT-STL
6h 22m1 stop
$291Delta
Find Deal
Sat, Jul 26 - Wed, Jul 30
United Airlines Logo
8:00 am - 9:39 amSTL-PIT
24h 39m2 stops
United Airlines Logo
8:45 am - 2:37 pmPIT-STL
6h 52m1 stop
$455United Airlines
Find Deal
Fri, Jul 4 - Mon, Jul 7
United Airlines Logo
10:00 am - 11:15 pmSTL-PIT
12h 15m2 stops
United Airlines Logo
5:51 pm - 10:45 pmPIT-STL
5h 54m1 stop
$460United Airlines
Find Deal
Fri, Jul 4 - Mon, Jul 7

Delta flights from St. Louis to Pittsburgh

Our best Delta deals on St. Louis to Pittsburgh flight tickets
Delta
Sep 1
STL5:11 pmLambert-St Louis
4h 59m
1 stop
PIT11:10 pmPittsburgh
Sep 6
PIT5:57 pmPittsburgh
5h 05m
1 stop
STL10:02 pmLambert-St Louis
Delta
Jul 26
STL6:40 amLambert-St Louis
3h 33m
1 stop
PIT11:13 amPittsburgh
Jul 30
PIT6:31 pmPittsburgh
6h 22m
1 stop
STL11:53 pmLambert-St Louis
Delta
Jul 25
STL5:23 pmLambert-St Louis
5h 59m
1 stop
PIT12:22 amPittsburgh
Jul 27
PIT8:25 pmPittsburgh
4h 28m
1 stop
STL11:53 pmLambert-St Louis

American Airlines flights from St. Louis to Pittsburgh

Our best American Airlines deals on St. Louis to Pittsburgh flight tickets
American Airlines
Aug 21
STL6:00 amLambert-St Louis
7h 51m
1 stop
PIT2:51 pmPittsburgh
Aug 26
PIT8:23 amPittsburgh
8h 26m
1 stop
STL3:49 pmLambert-St Louis
American Airlines
Aug 6
STL6:06 amLambert-St Louis
7h 45m
1 stop
PIT2:51 pmPittsburgh
Aug 11
PIT2:40 pmPittsburgh
7h 22m
1 stop
STL9:02 pmLambert-St Louis
American Airlines
Aug 27
STL7:23 amLambert-St Louis
8h 10m
1 stop
PIT4:33 pmPittsburgh
Aug 31
PIT1:45 pmPittsburgh
6h 38m
1 stop
STL7:23 pmLambert-St Louis

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, August 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 $283. 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 $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 $479. 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 at noon, with an average ticket price of $381. Departure times at noon 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 15 weeks ahead of your departure date. In general, you can expect to find flights to Pittsburgh for around $358 when searching 15 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 25% 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 June 2025, prices for St. Louis to Pittsburgh flights are approximately 49% 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

$91

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 $91. 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)

  • 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 $249Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $252Free CancellationRating
8.0
7,963 reviews
Search Delta flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
8,801 reviews
Search United Airlines flights
SouthwestPriceFrom $273Free CancellationRating
8.0
4,278 reviews
Search Southwest flights
  • Southwest Flights From St. Louis to Pittsburgh

    Southwest flight deals from St. Louis to Pittsburgh start from $273 round-trip. Over the 8 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
Monroeville
Washington
Wheeling
Butler
West Mifflin
Steubenville
New Castle
Canonsburg
Moon
Belle Vernon
Coraopolis
Triadelphia
Wexford
Mars
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.


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1 adult
Sat 6/21
Sat 6/28

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