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Cheap flights from Pittsburgh to St. Louis from $69

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Pittsburgh to St. Louis departing on 3/3. 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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Find the cheapest flights from Pittsburgh to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:09 pm - 11:48 pm
PIT
-
STL
5h 39m
1 stop
American Airlines Logo
6:06 am - 12:41 pm
STL
-
PIT
5h 35m
1 stop
$182American Airlines
Tue, Feb 24 - Sat, Feb 28
Delta Logo
6:30 am - 9:42 am
PIT
-
STL
4h 12m
1 stop
Delta Logo
10:45 am - 3:34 pm
STL
-
PIT
3h 49m
1 stop
$187Delta
Wed, May 6 - Sat, May 9
Delta Logo
6:30 am - 9:42 am
PIT
-
STL
4h 12m
1 stop
Delta Logo
5:59 pm - 10:56 pm
STL
-
PIT
3h 57m
1 stop
$197Delta
Fri, Apr 24 - Sat, Apr 25
Delta Logo
5:56 pm - 8:43 pm
PIT
-
STL
3h 47m
1 stop
Delta Logo
7:10 am - 12:36 pm
STL
-
PIT
4h 26m
1 stop
$205Delta
Fri, Feb 20 - Tue, Feb 24
Southwest Logo
6:05 am - 11:25 am
PIT
-
STL
6h 20m
1 stop
Southwest Logo
6:55 pm - 9:30 pm
STL
-
PIT
1h 35mnonstop
$233Southwest
Wed, May 6 - Sat, May 9
United Airlines Logo
7:00 am - 10:45 am
PIT
-
STL
4h 45m
1 stop
United Airlines Logo
8:21 am - 1:05 pm
STL
-
PIT
3h 44m
1 stop
$235United Airlines
Sun, Mar 29 - Fri, Apr 3
United Airlines Logo
5:55 pm - 9:08 pm
PIT
-
STL
4h 13m
1 stop
United Airlines Logo
9:10 am - 4:50 pm
STL
-
PIT
6h 40m
1 stop
$237United Airlines
Sun, Mar 29 - Fri, Apr 3
Delta Logo
5:00 pm - 11:36 pm
PIT
-
STL
7h 36m
1 stop
Delta Logo
5:50 pm - 10:37 pm
STL
-
PIT
3h 47m
1 stop
$241Delta
Wed, Feb 18 - Mon, Feb 23
United Airlines Logo
5:57 pm - 9:42 pm
PIT
-
STL
4h 45m
1 stop
United Airlines Logo
7:45 am - 1:05 pm
STL
-
PIT
4h 20m
1 stop
$247United Airlines
Sat, Mar 28 - Thu, Apr 2
Delta Logo
7:35 pm - 11:58 pm
PIT
-
STL
5h 23m
1 stop
Delta Logo
6:32 am - 1:27 pm
STL
-
PIT
5h 55m
1 stop
$248Delta
Mon, Mar 30 - Sat, Apr 4

American Airlines flights from Pittsburgh to St. Louis

Our best American Airlines deals on Pittsburgh to St. Louis flight tickets
American Airlines
Feb 24
PIT7:09 pmPittsburgh
5h 39m
1 stop
STL11:48 pmLambert-St Louis
Feb 28
STL6:06 amLambert-St Louis
5h 35m
1 stop
PIT12:41 pmPittsburgh
$182
American Airlines
Feb 16
PIT6:00 amPittsburgh
7h 33m
1 stop
STL12:33 pmLambert-St Louis
Feb 22
STL6:00 amLambert-St Louis
4h 10m
1 stop
PIT11:10 amPittsburgh
$302
American Airlines
Mar 26
PIT8:00 amPittsburgh
6h 43m
1 stop
STL1:43 pmLambert-St Louis
Mar 29
STL6:13 amLambert-St Louis
6h 30m
1 stop
PIT1:43 pmPittsburgh
$334

Delta flights from Pittsburgh to St. Louis

Our best Delta deals on Pittsburgh to St. Louis flight tickets
Delta
May 6
PIT6:30 amPittsburgh
4h 12m
1 stop
STL9:42 amLambert-St Louis
May 9
STL10:45 amLambert-St Louis
3h 49m
1 stop
PIT3:34 pmPittsburgh
$187
Delta
Apr 24
PIT6:30 amPittsburgh
4h 12m
1 stop
STL9:42 amLambert-St Louis
Apr 25
STL5:59 pmLambert-St Louis
3h 57m
1 stop
PIT10:56 pmPittsburgh
$197
Delta
Feb 20
PIT5:56 pmPittsburgh
3h 47m
1 stop
STL8:43 pmLambert-St Louis
Feb 24
STL7:10 amLambert-St Louis
4h 26m
1 stop
PIT12:36 pmPittsburgh
$205

momondo Fare Finder

 
Customize your flight search to find flights from Pittsburgh to St. Louis 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 February 8, 2026.
Use the filters below to find and compare flights from Pittsburgh to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Tue 2/24

7:09 pm-11:48 pm

1 stop5h 39m

Lambert-St Louis

Sat 2/28

6:06 am-12:41 pm

1 stop5h 35m

$182

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 5/6

6:30 am-9:42 am

1 stop4h 12m

Lambert-St Louis

Sat 5/9

10:45 am-3:34 pm

1 stop3h 49m

$187

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Fri 4/24

6:30 am-9:42 am

1 stop4h 12m

Lambert-St Louis

Sat 4/25

5:59 pm-10:56 pm

1 stop3h 57m

$197

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Fri 2/20

5:56 pm-8:43 pm

1 stop3h 47m

Lambert-St Louis

Tue 2/24

7:10 am-12:36 pm

1 stop4h 26m

$205

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 5/6

6:05 am-11:25 am

1 stop6h 20m

Lambert-St Louis

Sat 5/9

6:55 pm-9:30 pm

Nonstop1h 35m

$233

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 3/29

7:00 am-10:45 am

1 stop4h 45m

Lambert-St Louis

Fri 4/3

8:21 am-1:05 pm

1 stop3h 44m

$235

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 3/29

5:55 pm-9:08 pm

1 stop4h 13m

Lambert-St Louis

Fri 4/3

9:10 am-4:50 pm

1 stop6h 40m

$237

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 2/18

5:00 pm-11:36 pm

1 stop7h 36m

Lambert-St Louis

Mon 2/23

5:50 pm-10:37 pm

1 stop3h 47m

$241

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sat 3/28

5:57 pm-9:42 pm

1 stop4h 45m

Lambert-St Louis

Thu 4/2

7:45 am-1:05 pm

1 stop4h 20m

$247

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 3/30

7:35 pm-11:58 pm

1 stop5h 23m

Lambert-St Louis

Sat 4/4

6:32 am-1:27 pm

1 stop5h 55m

$248

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 St. Louis from

How to get the cheapest flight ticket from Pittsburgh to St. Louis

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 St. Louis?

In general, November is the cheapest month to fly from Pittsburgh to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $283. The month of April is another great option to travel to St. Louis, with average flight prices from Pittsburgh averaging around $294.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $347. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $438. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Pittsburgh at noon is the least expensive time of day to depart. momondo users have found prices as low as $313 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $436 per ticket.

What is the cheapest Pittsburgh to Lambert-St Louis flight route?

Fly from Pittsburgh to Lambert-St Louis for the best Pittsburgh - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Pittsburgh when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $341 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Pittsburgh for as low as $268 on momondo.

What cabin class options are available on Pittsburgh to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on Pittsburgh to Lambert-St Louis 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 Pittsburgh to St. Louis flights?

No. A direct flight is the cheapest option for a flight between Pittsburgh to St. Louis.

How have Pittsburgh to St. Louis flight prices changed over time?

As of February 2026, prices for Pittsburgh to St. Louis flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from Pittsburgh to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Pittsburgh to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Pittsburgh to St. Louis (PIT to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Pittsburgh to St. Louis

Best Price Found

$171

Fastest flight time

1h 45m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Pittsburgh in the past 72 hours is $171. The best round-trip flight deal from Pittsburgh to St. Louis found on momondo in the last 72 hours is $353.
The fastest flight from Pittsburgh to St. Louis takes 1h 45m
Direct flights go from Pittsburgh to St. Louis every day.
There is 1 airport in St. Louis. From Pittsburgh there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • How far is Pittsburgh to Lambert-St Louis by plane?

    The straight-line distance from Pittsburgh to Lambert-St Louis is 557.2 mi. Flights usually cover this in 1h 45m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Pittsburgh Airport to Lambert-St Louis Airport?

    Prices for flights from Pittsburgh Airport to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Pittsburgh Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Pittsburgh Airport to Lambert-St Louis Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Pittsburgh Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis 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 Lambert-St Louis 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 Pittsburgh to St. Louis?

  • What is the most popular airline from Pittsburgh to St. Louis?

Best airlines flying from Pittsburgh to St. Louis

Compare and see reviews for airlines that fly from Pittsburgh to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $170Free CancellationRating
7.2
11,254 reviews
Search American Airlines flights
SouthwestPriceFrom $241Free CancellationRating
8.0
4,282 reviews
Search Southwest flights
DeltaPriceFrom $258Free CancellationRating
7.9
8,173 reviews
Search Delta flights
United AirlinesPriceFrom $295Free CancellationRating
7.4
9,257 reviews
Search United Airlines flights

  • Southwest Flights From Pittsburgh to St. Louis

    The lowest priced Southwest flight from Pittsburgh to St. Louis from the last 72 hours was $241. Generally, Southwest has 7 flights on this route every week with an average price of $342. Southwest is rated 8.0/10 by our users.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Pittsburgh to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Pittsburgh to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Pittsburgh to St. Louis with flexible booking policies on momondo?

Flights from Pittsburgh to St. Louis 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 Pittsburgh to St. Louis?

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 St. Louis from Pittsburgh.

I’m not ready to book a flight from Pittsburgh to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Pittsburgh to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

An easier way to manage your St. Louis 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.
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