$101+ Cheap flights from Pittsburgh to St. Louis (PIT - STL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — STL
Aug 1 — Aug 81
Round-trip
1 adult, Economy
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Find cheap flights from Pittsburgh to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Pittsburgh to Lambert-St Louis are usually found in August or November, booked 69 days in advance, depart on a Thursday or Tuesday and return on a Wednesday
Cheap flight deals from Pittsburgh to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Pittsburgh to St. LouisExplore the most affordable flight options available from Pittsburgh to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2026.
Explore the most affordable flight options available from Pittsburgh to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2026.
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:09 pm
PIT
- STL
1 stop4h 51m
United Airlines
Wed 8/198:00 am
STL
- PIT
1 stop4h 15m
United Airlines
Deal found 6/28![United Airlines logo]()
$196
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:42 pm
PIT
- STL
1 stop4h 46m
American Airlines
Wed 8/199:15 am
STL
- PIT
1 stop4h 42m
American Airlines
Deal found 7/2![American Airlines logo]()
$201
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:35 am
PIT
- STL
1 stop6h 00m
American Airlines
Tue 8/45:58 pm
STL
- PIT
1 stop5h 09m
American Airlines
Deal found 6/30![American Airlines logo]()
$215
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:45 am
PIT
- STL
Nonstop1h 45m
Southwest
Tue 8/410:25 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/30![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:40 am
PIT
- STL
Nonstop1h 40m
Southwest
Sat 8/85:45 am
STL
- PIT
1 stop3h 25m
Southwest
Deal found 6/28![Southwest logo]()
$220
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:50 am
PIT
- STL
1 stop6h 56m
Delta
Thu 8/65:23 pm
STL
- PIT
1 stop6h 13m
Delta
Deal found 6/28![Delta logo]()
$221
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2810:16 am
PIT
- STL
1 stop5h 32m
Delta
Sat 8/16:30 am
STL
- PIT
1 stop4h 12m
Delta
Deal found 6/29![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:40 am
PIT
- STL
Nonstop1h 40m
Southwest
Thu 8/610:30 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/29![Southwest logo]()
$232
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:17 pm
PIT
- STL
1 stop6h 21m
Delta
Thu 8/206:30 am
STL
- PIT
1 stop3h 49m
Delta
Deal found 7/2![Delta logo]()
$242
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:20 pm
PIT
- STL
Nonstop1h 40m
Southwest
Mon 8/1010:30 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/28![Southwest logo]()
$245
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:45 am
PIT
- STL
1 stop5h 12m
United Airlines
Sun 8/308:00 am
STL
- PIT
1 stop4h 15m
United Airlines
Deal found 7/1![United Airlines logo]()
$247
Best flights from Pittsburgh to St. LouisDiscover carefully curated flight deals from Pittsburgh to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 2, 2026.
Discover carefully curated flight deals from Pittsburgh to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 2, 2026.
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:45 am
PIT
- STL
Nonstop1h 45m
Southwest
Tue 8/410:25 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/30![Southwest logo]()
$219
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:50 am
PIT
- STL
1 stop5h 04m
Delta
Thu 8/2012:52 pm
STL
- PIT
1 stop6h 38m
Delta
Deal found 6/29![Delta logo]()
$221
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:45 am
PIT
- STL
1 stop5h 12m
United Airlines
Sun 8/308:00 am
STL
- PIT
1 stop4h 15m
United Airlines
Deal found 7/1![United Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/296:45 am
PIT
- STL
Nonstop1h 45m
Southwest
Wed 8/56:50 pm
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 7/1![Southwest logo]()
$219
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:21 pm
PIT
- STL
1 stop6h 32m
Delta
Mon 7/276:00 am
STL
- PIT
1 stop5h 52m
Delta
Deal found 6/27![Delta logo]()
$266
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:20 pm
PIT
- STL
Nonstop1h 40m
Southwest
Mon 8/1010:30 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/28![Southwest logo]()
$245
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:00 am
PIT
- STL
1 stop6h 02m
United Airlines
Wed 9/28:00 am
STL
- PIT
1 stop4h 15m
United Airlines
Deal found 7/1![United Airlines logo]()
$276
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:45 am
PIT
- STL
Nonstop1h 45m
Southwest
Mon 7/276:15 pm
STL
- PIT
1 stop5h 40m
Southwest
Deal found 6/27![Southwest logo]()
$261
This Southwest deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:20 pm
PIT
- STL
Nonstop1h 40m
Southwest
Sun 8/307:20 am
STL
- PIT
1 stop4h 00m
Southwest
Deal found 7/1![Southwest logo]()
$274
Last-minute flights from Pittsburgh to St. LouisDiscover last-minute flight deals from Pittsburgh to St. Louis. Data last updated July 2, 2026 and is based on user searches.
Discover last-minute flight deals from Pittsburgh to St. Louis. Data last updated July 2, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:35 am
PIT
- STL
1 stop6h 00m
American Airlines
Tue 8/45:58 pm
STL
- PIT
1 stop5h 09m
American Airlines
Deal found 6/30![American Airlines logo]()
$215
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:45 am
PIT
- STL
Nonstop1h 45m
Southwest
Tue 8/410:25 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/30![Southwest logo]()
$219
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2810:16 am
PIT
- STL
1 stop5h 32m
Delta
Sat 8/16:30 am
STL
- PIT
1 stop4h 12m
Delta
Deal found 6/29![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:40 am
PIT
- STL
Nonstop1h 40m
Southwest
Sat 8/85:45 am
STL
- PIT
1 stop3h 25m
Southwest
Deal found 6/28![Southwest logo]()
$220
This Southwest deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:40 am
PIT
- STL
Nonstop1h 40m
Southwest
Thu 8/610:30 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/29![Southwest logo]()
$232
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:50 am
PIT
- STL
1 stop6h 56m
Delta
Thu 8/65:23 pm
STL
- PIT
1 stop6h 13m
Delta
Deal found 6/28![Delta logo]()
$221
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:20 pm
PIT
- STL
Nonstop1h 40m
Southwest
Mon 8/1010:30 am
STL
- PIT
Nonstop1h 40m
Southwest
Deal found 6/28![Southwest logo]()
$245
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:09 pm
PIT
- STL
1 stop4h 51m
United Airlines
Wed 8/198:00 am
STL
- PIT
1 stop4h 15m
United Airlines
Deal found 6/28![United Airlines logo]()
$196
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:42 pm
PIT
- STL
1 stop4h 46m
American Airlines
Wed 8/199:15 am
STL
- PIT
1 stop4h 42m
American Airlines
Deal found 7/2![American Airlines logo]()
$201
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:17 pm
PIT
- STL
1 stop6h 21m
Delta
Thu 8/206:30 am
STL
- PIT
1 stop3h 49m
Delta
Deal found 7/2![Delta logo]()
$242
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:45 am
PIT
- STL
1 stop5h 12m
United Airlines
Sun 8/308:00 am
STL
- PIT
1 stop4h 15m
United Airlines
Deal found 7/1![United Airlines logo]()
$247
One-way flights from Pittsburgh to St. LouisSearch for one-way flight options from Pittsburgh to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 2, 2026.
Search for one-way flight options from Pittsburgh to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 2, 2026.
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:16 am
PIT
- STL
1 stop7h 19m
American Airlines
Deal found 6/28![American Airlines logo]()
$101
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:45 pm
PIT
- STL
Nonstop1h 45m
Southwest
Deal found 6/30![Southwest logo]()
$110
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:19 pm
PIT
- STL
1 stop6h 39m
Delta
Deal found 6/29![Delta logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/231:09 pm
PIT
- STL
2 stops29h 13m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$113
This Delta deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2810:16 am
PIT
- STL
1 stop5h 32m
Delta
Deal found 7/1![Delta logo]()
$115
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:35 am
PIT
- STL
2 stops8h 35m
Southwest
Deal found 6/28![Southwest logo]()
$116
This Frontier deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:13 pm
PIT
- STL
1 stop5h 46m
Frontier
Deal found 6/30![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:00 am
PIT
- STL
2 stops36h 37m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$121
This Southwest deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:20 pm
PIT
- STL
Nonstop1h 40m
Southwest
Deal found 6/29![Southwest logo]()
$123
This Southwest deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:20 am
PIT
- STL
2 stops10h 10m
Southwest
Deal found 7/1![Southwest logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:09 pm
PIT
- STL
2 stops29h 13m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$126
Find flight deals from Pittsburgh to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Pittsburgh (PIT) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $196 (United Airlines) |
One-way from | $101 (American Airlines) |
Popular in | June |
Cheapest in | August |
Average price | $353 |
Good round-trip deal | $305 or less |
Good one-way deal | $224 or less |
Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 2, 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
Cheapest round-trip
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Tue 7/28
6:45 am-7:30 am
Nonstop1h 45m
Lambert-St Louis
Tue 8/4
10:25 am-1:05 pm
Nonstop1h 40m
$219
Quickest round-trip
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Wed 7/29
6:45 am-7:30 am
Nonstop1h 45m
Lambert-St Louis
Wed 8/5
6:50 pm-9:25 pm
Nonstop1h 35m
$219
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Tue 8/18
5:50 am-9:54 am
1 stop5h 04m
Lambert-St Louis
Thu 8/20
12:52 pm-8:30 pm
1 stop6h 38m
$221
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Thu 8/6
7:20 pm-8:00 pm
Nonstop1h 40m
Lambert-St Louis
Mon 8/10
10:30 am-1:10 pm
Nonstop1h 40m
$245
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Thu 8/27
10:45 am-2:57 pm
1 stop5h 12m
Lambert-St Louis
Sun 8/30
8:00 am-1:15 pm
1 stop4h 15m
$247
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Wed 7/22
6:45 am-7:30 am
Nonstop1h 45m
Lambert-St Louis
Mon 7/27
6:15 pm-12:55 am
1 stop5h 40m
$261
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Wed 7/22
6:21 pm-11:53 pm
1 stop6h 32m
Lambert-St Louis
Mon 7/27
6:00 am-12:52 pm
1 stop5h 52m
$266
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Thu 8/27
7:20 pm-8:00 pm
Nonstop1h 40m
Lambert-St Louis
Sun 8/30
7:20 am-12:20 pm
1 stop4h 00m
$274
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Tue 9/1
7:00 am-12:02 pm
1 stop6h 02m
Lambert-St Louis
Wed 9/2
8:00 am-1:15 pm
1 stop4h 15m
$276
Cheapest one-way
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Sat 10/17
12:06 pm-4:11 pm
1 stop5h 05m
$101
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Pittsburgh to St. Louis
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Pittsburgh to St. Louis in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Pittsburgh-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Pittsburgh-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Pittsburgh-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Pittsburgh-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Pittsburgh-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Pittsburgh to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Pittsburgh with our price prediction graph.
PIT-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Pittsburgh to St. Louis
How far ahead should I book a flight from Pittsburgh to St. Louis?
Booking 68 days in advance of your planned departure date is, on average, the best time to get cheap flights from Pittsburgh to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Pittsburgh to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Pittsburgh to St. Louis (average of $267). Flying from Pittsburgh to St. Louis in June is currently the most expensive (average of $471). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from PIT to STL?
Find hourly flight availability from Pittsburgh to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2026.
A simple way to save on the total cost of your ticket is to fly from Pittsburgh to St. Louis at noon. If you’re flexible enough to do this you can expect to save up to 30% on your trip compared to booking a flight in the morning.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated July 2, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Pittsburgh to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Related info for your journey
Find useful and relevant information for your journey from Pittsburgh to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
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Pittsburgh and St. Louis flights
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Top 4 airlines flying from Pittsburgh to St. Louis
Discover the top 4 airlines that operate flights from Pittsburgh to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$170 | Average$350 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$196 | Average$388 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$227 | Average$353 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$291 | Average$404 | FlexibilityNo cancel fee | On-timeN/A |