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Cheap flights from Pittsburgh to St. Louis from $68

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 2/23. 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
1:25 pm - 5:01 pm
PIT
-
STL
4h 36m1 stop
American Airlines Logo
3:54 pm - 11:29 pm
STL
-
PIT
6h 35m1 stop
$175American Airlines
Sat, Jan 17 - Tue, Jan 20
Multiple Airlines Logo
5:32 am - 9:21 am
PIT
-
STL
28h 49m1 stop
Multiple Airlines Logo
9:41 am - 7:46 pm
STL
-
PIT
9h 05m1 stop
$176Multiple Airlines
Sun, Feb 1 - Sat, Feb 14
Multiple Airlines Logo
6:00 am - 6:51 am
PIT
-
STL
25h 51m2 stops
Multiple Airlines Logo
11:18 am - 11:07 pm
STL
-
PIT
10h 49m1 stop
$185Multiple Airlines
Tue, Feb 3 - Fri, Feb 6
Multiple Airlines Logo
5:32 am - 11:33 pm
PIT
-
STL
19h 01m1 stop
Multiple Airlines Logo
5:42 pm - 9:40 am
STL
-
PIT
38h 58m2 stops
$188Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
Multiple Airlines Logo
5:32 am - 10:34 pm
PIT
-
STL
18h 02m1 stop
Multiple Airlines Logo
5:42 pm - 9:40 am
STL
-
PIT
38h 58m2 stops
$189Multiple Airlines
Sat, Jan 17 - Tue, Jan 20
American Airlines Logo
8:06 am - 1:03 pm
PIT
-
STL
5h 57m1 stop
American Airlines Logo
6:00 am - 11:13 am
STL
-
PIT
4h 13m1 stop
$191American Airlines
Thu, Jan 22 - Mon, Jan 26
Multiple Airlines Logo
5:50 pm - 11:33 pm
PIT
-
STL
30h 43m2 stops
Multiple Airlines Logo
9:41 am - 7:46 pm
STL
-
PIT
9h 05m1 stop
$194Multiple Airlines
Sun, Feb 1 - Sat, Feb 14
Multiple Airlines Logo
5:32 am - 11:33 pm
PIT
-
STL
19h 01m1 stop
Multiple Airlines Logo
10:16 am - 11:44 pm
STL
-
PIT
12h 28m2 stops
$213Multiple Airlines
Sat, Feb 7 - Mon, Feb 9
Multiple Airlines Logo
5:32 am - 9:21 am
PIT
-
STL
28h 49m1 stop
Multiple Airlines Logo
8:59 am - 9:58 pm
STL
-
PIT
11h 59m1 stop
$224Multiple Airlines
Sun, Feb 1 - Sun, Feb 8
Multiple Airlines Logo
5:32 am - 9:21 am
PIT
-
STL
28h 49m1 stop
Multiple Airlines Logo
5:42 pm - 9:40 am
STL
-
PIT
38h 58m2 stops
$225Multiple Airlines
Sun, Feb 1 - Sun, Feb 8

United Airlines flights from Pittsburgh to St. Louis

Our best United Airlines deals on Pittsburgh to St. Louis flight tickets
United Airlines
Jan 20
PIT6:40 pmPittsburgh
6h 19m
1 stop
STL11:59 pmLambert-St Louis
Jan 21
STL8:30 amLambert-St Louis
4h 34m
1 stop
PIT2:04 pmPittsburgh
$261
Find similar
United Airlines
Feb 19
PIT6:10 amPittsburgh
5h 03m
1 stop
STL10:13 amLambert-St Louis
Feb 24
STL11:25 amLambert-St Louis
10h 50m
2 stops
PIT11:15 pmPittsburgh
$402
Find similar
United Airlines
Jan 10
PIT7:00 amPittsburgh
5h 02m
1 stop
STL11:02 amLambert-St Louis
Jan 14
STL11:22 amLambert-St Louis
6h 47m
1 stop
PIT7:09 pmPittsburgh
$429
Find similar

American Airlines flights from Pittsburgh to St. Louis

Our best American Airlines deals on Pittsburgh to St. Louis flight tickets
American Airlines
Jan 17
PIT1:25 pmPittsburgh
4h 36m
1 stop
STL5:01 pmLambert-St Louis
Jan 20
STL3:54 pmLambert-St Louis
6h 35m
1 stop
PIT11:29 pmPittsburgh
$175
Find similar
American Airlines
Jan 22
PIT8:06 amPittsburgh
5h 57m
1 stop
STL1:03 pmLambert-St Louis
Jan 26
STL6:00 amLambert-St Louis
4h 13m
1 stop
PIT11:13 amPittsburgh
$191
Find similar
American Airlines
Mar 3
PIT8:54 amPittsburgh
7h 08m
1 stop
STL3:02 pmLambert-St Louis
Mar 9
STL3:51 pmLambert-St Louis
6h 19m
1 stop
PIT11:10 pmPittsburgh
$254
Find similar

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 December 28, 2025.
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

Sat 1/17

1:25 pm-5:01 pm

1 stop4h 36m

Lambert-St Louis

Tue 1/20

3:54 pm-11:29 pm

1 stop6h 35m

$175

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 2/1

5:32 am-9:21 am

1 stop28h 49m

Lambert-St Louis

Sat 2/14

9:41 am-7:46 pm

1 stop9h 05m

$176

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Tue 2/3

6:00 am-6:51 am

2 stops25h 51m

Lambert-St Louis

Fri 2/6

11:18 am-11:07 pm

1 stop10h 49m

$185

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Thu 1/22

5:32 am-11:33 pm

1 stop19h 01m

Lambert-St Louis

Mon 1/26

5:42 pm-9:40 am

2 stops38h 58m

$188

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sat 1/17

5:32 am-10:34 pm

1 stop18h 02m

Lambert-St Louis

Tue 1/20

5:42 pm-9:40 am

2 stops38h 58m

$189

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Thu 1/22

8:06 am-1:03 pm

1 stop5h 57m

Lambert-St Louis

Mon 1/26

6:00 am-11:13 am

1 stop4h 13m

$191

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 2/1

5:50 pm-11:33 pm

2 stops30h 43m

Lambert-St Louis

Sat 2/14

9:41 am-7:46 pm

1 stop9h 05m

$194

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sat 2/7

5:32 am-11:33 pm

1 stop19h 01m

Lambert-St Louis

Mon 2/9

10:16 am-11:44 pm

2 stops12h 28m

$213

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 2/1

5:32 am-9:21 am

1 stop28h 49m

Lambert-St Louis

Sun 2/8

8:59 am-9:58 pm

1 stop11h 59m

$224

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Sun 2/1

5:32 am-9:21 am

1 stop28h 49m

Lambert-St Louis

Sun 2/8

5:42 pm-9:40 am

2 stops38h 58m

$225

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, April 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 $258. The month of November is another great option to travel to St. Louis, with average flight prices from Pittsburgh averaging around $283.

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 Thursday when prices can be found for as low as $346. 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 Monday because tickets tend to average around $426. 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 $331 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 $425 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 $332 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 $257 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 December 2025, prices for Pittsburgh to St. Louis flights are approximately 102% more expensive 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

$248

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 $248. The best round-trip flight deal from Pittsburgh to St. Louis found on momondo in the last 72 hours is $358.
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 $171Free CancellationRating
7.2
11,073 reviews
Search American Airlines flights
SouthwestPriceFrom $241Free CancellationRating
8.0
4,256 reviews
Search Southwest flights
DeltaPriceFrom $258Free CancellationRating
7.9
8,019 reviews
Search Delta flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
9,113 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 5 flights on this route every week with an average price of $346. 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
O'Fallon
Florissant
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Glencoe
Eureka
Festus
Edwardsville
Litchfield
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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