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Cheap flights from Pittsburgh to St. Louis from $86

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 1/7. 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

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American Airlines Logo
7:00 am - 2:09 pmPIT-STL
8h 09m1 stop
American Airlines Logo
9:08 am - 5:24 pmSTL-PIT
7h 16m1 stop
$183American Airlines
Find Deal
jue., dic. 25 - jue., ene. 1
American Airlines Logo
11:17 am - 3:04 pmPIT-STL
4h 47m1 stop
American Airlines Logo
11:05 am - 9:00 pmSTL-PIT
8h 55m1 stop
$195American Airlines
Find Deal
mié., ene. 14 - dom., ene. 18
Multiple Airlines Logo
6:00 am - 11:33 pmPIT-STL
18h 33m2 stops
Multiple Airlines Logo
12:12 pm - 11:07 pmSTL-PIT
9h 55m1 stop
$198Multiple Airlines
Find Deal
mié., ene. 28 - sáb., ene. 31
Delta Logo
6:00 am - 11:05 amPIT-STL
6h 05m1 stop
Delta Logo
7:10 am - 12:43 pmSTL-PIT
4h 33m1 stop
$207Delta
Find Deal
mar., ene. 13 - mié., ene. 14
American Airlines Logo
6:58 pm - 11:28 pmPIT-STL
5h 30m1 stop
American Airlines Logo
6:00 am - 5:18 pmSTL-PIT
10h 18m1 stop
$213American Airlines
Find Deal
jue., feb. 12 - dom., feb. 15
American Airlines Logo
3:25 pm - 8:32 pmPIT-STL
6h 07m1 stop
American Airlines Logo
3:54 pm - 11:33 pmSTL-PIT
6h 39m1 stop
$225American Airlines
Find Deal
mié., ene. 28 - sáb., ene. 31
Multiple Airlines Logo
5:05 pm - 9:47 amPIT-STL
17h 42m2 stops
Multiple Airlines Logo
3:30 pm - 8:28 pmSTL-PIT
27h 58m1 stop
$234Multiple Airlines
Find Deal
sáb., dic. 13 - mar., dic. 16
American Airlines Logo
3:25 pm - 8:32 pmPIT-STL
6h 07m1 stop
American Airlines Logo
7:00 am - 2:41 pmSTL-PIT
6h 41m1 stop
$242American Airlines
Find Deal
jue., ene. 8 - jue., ene. 15
Delta Logo
12:55 pm - 5:50 pmPIT-STL
5h 55m1 stop
Delta Logo
7:10 am - 12:38 pmSTL-PIT
4h 28m1 stop
$243Delta
Find Deal
jue., ene. 8 - sáb., ene. 10
Multiple Airlines Logo
7:10 am - 10:33 pmPIT-STL
16h 23m1 stop
Multiple Airlines Logo
11:51 am - 10:42 pmSTL-PIT
9h 51m1 stop
$248Multiple Airlines
Find Deal
lun., dic. 15 - jue., dic. 18

American Airlines flights from Pittsburgh to St. Louis

Our best American Airlines deals on Pittsburgh to St. Louis flight tickets
American Airlines
Dec 25
PIT7:00 amPittsburgh
8h 09m
1 stop
STL2:09 pmLambert-St Louis
Jan 1
STL9:08 amLambert-St Louis
7h 16m
1 stop
PIT5:24 pmPittsburgh
$183
Find similar
American Airlines
Dec 25
PIT7:00 amPittsburgh
8h 09m
1 stop
STL2:09 pmLambert-St Louis
Jan 1
STL9:08 amLambert-St Louis
7h 16m
1 stop
PIT5:24 pmPittsburgh
$184
Find similar
American Airlines
Dec 25
PIT7:00 amPittsburgh
8h 09m
1 stop
STL2:09 pmLambert-St Louis
Jan 1
STL9:08 amLambert-St Louis
7h 16m
1 stop
PIT5:24 pmPittsburgh
$185
Find similar

Southwest flights from Pittsburgh to St. Louis

Our best Southwest deals on Pittsburgh to St. Louis flight tickets
Southwest
Dec 25
PIT3:35 pmPittsburgh
1h 50m
STL4:25 pmLambert-St Louis
Jan 1
STL8:15 amLambert-St Louis
5h 40m
1 stop
PIT2:55 pmPittsburgh
$273
Find similar
Southwest
Jan 8
PIT3:55 pmPittsburgh
7h 00m
2 stops
STL9:55 pmLambert-St Louis
Jan 10
STL6:40 amLambert-St Louis
4h 35m
1 stop
PIT12:15 pmPittsburgh
$281
Find similar
Southwest
Jan 28
PIT3:55 pmPittsburgh
7h 00m
2 stops
STL9:55 pmLambert-St Louis
Jan 31
STL10:30 amLambert-St Louis
7h 50m
2 stops
PIT7:20 pmPittsburgh
$286
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 noviembre 26, 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

jue. 12/25

7:00 am-2:09 pm

1 stop8h 09m

Lambert-St Louis

jue. 1/1

9:08 am-5:24 pm

1 stop7h 16m

$183

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

mié. 1/14

11:17 am-3:04 pm

1 stop4h 47m

Lambert-St Louis

dom. 1/18

11:05 am-9:00 pm

1 stop8h 55m

$195

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

mié. 1/28

6:00 am-11:33 pm

2 stops18h 33m

Lambert-St Louis

sáb. 1/31

12:12 pm-11:07 pm

1 stop9h 55m

$198

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

mar. 1/13

6:00 am-11:05 am

1 stop6h 05m

Lambert-St Louis

mié. 1/14

7:10 am-12:43 pm

1 stop4h 33m

$207

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

jue. 2/12

6:58 pm-11:28 pm

1 stop5h 30m

Lambert-St Louis

dom. 2/15

6:00 am-5:18 pm

1 stop10h 18m

$213

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

mié. 1/28

3:25 pm-8:32 pm

1 stop6h 07m

Lambert-St Louis

sáb. 1/31

3:54 pm-11:33 pm

1 stop6h 39m

$225

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

sáb. 12/13

5:05 pm-9:47 am

2 stops17h 42m

Lambert-St Louis

mar. 12/16

3:30 pm-8:28 pm

1 stop27h 58m

$234

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

jue. 1/8

3:25 pm-8:32 pm

1 stop6h 07m

Lambert-St Louis

jue. 1/15

7:00 am-2:41 pm

1 stop6h 41m

$242

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

jue. 1/8

12:55 pm-5:50 pm

1 stop5h 55m

Lambert-St Louis

sáb. 1/10

7:10 am-12:38 pm

1 stop4h 28m

$243

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

lun. 12/15

7:10 am-10:33 pm

1 stop16h 23m

Lambert-St Louis

jue. 12/18

11:51 am-10:42 pm

1 stop9h 51m

$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, 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 May is another great option to travel to St. Louis, with average flight prices from Pittsburgh averaging around $297.

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 $344. 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 $345 when looking at flights departing at noon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $437 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 $340 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 $244 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 November 2025, prices for Pittsburgh to St. Louis flights are approximately 25% 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

$256

Fastest flight time

1h 45m

Direct flights

Tue, Wed, Thu, Fri, Sat and Sun

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Pittsburgh in the past 72 hours is $256. The best round-trip flight deal from Pittsburgh to St. Louis found on momondo in the last 72 hours is $303.
The fastest flight from Pittsburgh to St. Louis takes 1h 45m
Direct flights go from Pittsburgh to St. Louis on Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport near St. Louis: 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 50m, 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
11,038 reviews
Search American Airlines flights
SouthwestPriceFrom $241Free CancellationRating
8.0
4,254 reviews
Search Southwest flights
DeltaPriceFrom $258Free CancellationRating
7.9
7,999 reviews
Search Delta flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
9,046 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 $348. 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
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
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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