$80+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — STL
Apr 5 — Apr 121
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 November or June, booked 29 days in advance, depart on a Wednesday or Thursday 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 March 6, 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 March 6, 2026.
This American Airlines deal was found by Cheapflights users on 3/5. 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.
Wed 4/13:16 pm
PIT
- STL
1 stop9h 28m
American Airlines
Tue 4/76:00 am
STL
- PIT
1 stop9h 48m
American Airlines
Deal found 3/5![American Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 3/2. 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.
Sat 8/291:50 pm
PIT
- STL
1 stop5h 12m
Delta
Tue 9/16:45 am
STL
- PIT
1 stop3h 26m
Delta
Deal found 3/2![Delta logo]()
$245
This Delta deal was found by Cheapflights users on 3/4. 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.
Fri 6/56:25 pm
PIT
- STL
1 stop6h 34m
Delta
Sun 6/76:45 am
STL
- PIT
1 stop3h 26m
Delta
Deal found 3/4![Delta logo]()
$247
This Delta deal was found by Cheapflights users on 3/4. 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 4/16:30 am
PIT
- STL
1 stop4h 16m
Delta
Tue 4/75:59 pm
STL
- PIT
1 stop3h 47m
Delta
Deal found 3/4![Delta logo]()
$251
This United Airlines deal was found by Cheapflights users on 3/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:00 pm
PIT
- STL
1 stop4h 13m
United Airlines
Fri 4/179:10 am
STL
- PIT
1 stop6h 40m
United Airlines
Deal found 3/2![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 3/3. 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.
Fri 4/244:20 pm
PIT
- STL
1 stop8h 20m
Southwest
Tue 4/286:45 pm
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 3/3![Southwest logo]()
$268
This Southwest deal was found by Cheapflights users on 3/4. 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 4/17:05 pm
PIT
- STL
Nonstop1h 55m
Southwest
Tue 4/76:45 pm
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 3/4![Southwest logo]()
$269
This American Airlines deal was found by Cheapflights users on 3/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/297:31 am
PIT
- STL
1 stop7h 12m
American Airlines
Sun 4/56:00 am
STL
- PIT
1 stop4h 17m
American Airlines
Deal found 3/1![American Airlines logo]()
$271
This Southwest deal was found by Cheapflights users on 3/3. 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.
Mon 3/232:25 pm
PIT
- STL
1 stop5h 30m
Southwest
Wed 3/2510:15 am
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 3/3![Southwest logo]()
$272
This Delta deal was found by Cheapflights users on 3/1. 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.
Mon 3/165:59 pm
PIT
- STL
1 stop3h 43m
Delta
Mon 3/304:21 pm
STL
- PIT
1 stop4h 03m
Delta
Deal found 3/1![Delta logo]()
$275
This Southwest deal was found by Cheapflights users on 3/6. 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 6/912:45 pm
PIT
- STL
1 stop7h 30m
Southwest
Wed 6/1010:25 am
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 3/6![Southwest logo]()
$276
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 March 6, 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 March 6, 2026.
This United Airlines deal was found by Cheapflights users on 3/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/87:15 pm
PIT
- STL
1 stop5h 42m
United Airlines
Tue 5/1210:25 am
STL
- PIT
1 stop5h 26m
United Airlines
Deal found 3/2![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 3/1. 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.
Fri 4/106:50 pm
PIT
- STL
1 stop6h 05m
Southwest
Sun 4/125:25 am
STL
- PIT
1 stop3h 35m
Southwest
Deal found 3/1![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 3/1. 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.
Wed 5/2712:01 pm
PIT
- STL
1 stop6h 45m
Delta
Sun 5/316:00 am
STL
- PIT
1 stop5h 45m
Delta
Deal found 3/1![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 3/3. 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.
Fri 4/246:50 pm
PIT
- STL
1 stop6h 05m
Southwest
Mon 4/2710:15 am
STL
- PIT
2 stops6h 55m
Southwest
Deal found 3/3![Southwest logo]()
$272
This Delta deal was found by Cheapflights users on 3/6. 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.
Thu 4/306:40 am
PIT
- STL
1 stop4h 02m
Delta
Tue 5/55:59 pm
STL
- PIT
1 stop3h 57m
Delta
Deal found 3/6![Delta logo]()
$281
This Southwest deal was found by Cheapflights users on 3/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/198:45 pm
PIT
- STL
1 stop4h 20m
Southwest
Mon 3/234:45 pm
STL
- PIT
1 stop3h 40m
Southwest
Deal found 3/2![Southwest logo]()
$275
This Delta deal was found by Cheapflights users on 3/3. 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.
Fri 5/227:50 pm
PIT
- STL
1 stop5h 09m
Delta
Tue 5/266:04 pm
STL
- PIT
1 stop3h 34m
Delta
Deal found 3/3![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 3/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:05 pm
PIT
- STL
Nonstop1h 50m
Southwest
Sat 4/118:45 am
STL
- PIT
1 stop6h 40m
Southwest
Deal found 3/2![Southwest logo]()
$283
This Delta deal was found by Cheapflights users on 3/2. 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.
Thu 5/216:25 pm
PIT
- STL
1 stop6h 34m
Delta
Mon 5/257:01 pm
STL
- PIT
1 stop4h 44m
Delta
Deal found 3/2![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 3/4. 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.
Fri 5/158:10 pm
PIT
- STL
1 stop4h 05m
Southwest
Mon 5/185:40 am
STL
- PIT
1 stop3h 20m
Southwest
Deal found 3/4![Southwest logo]()
$287
Last-minute flights from Pittsburgh to St. LouisDiscover last-minute flight deals from Pittsburgh to St. Louis. Data last updated March 6, 2026 and is based on user searches.
Discover last-minute flight deals from Pittsburgh to St. Louis. Data last updated March 6, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/1. 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.
Mon 3/165:59 pm
PIT
- STL
1 stop3h 43m
Delta
Tue 3/175:59 pm
STL
- PIT
1 stop3h 47m
Delta
Deal found 3/1![Delta logo]()
$275
This Southwest deal was found by Cheapflights users on 3/1. 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.
Mon 3/165:55 pm
PIT
- STL
1 stop6h 10m
Southwest
Mon 3/304:25 pm
STL
- PIT
2 stops6h 15m
Southwest
Deal found 3/1![Southwest logo]()
$280
This Southwest deal was found by Cheapflights users on 3/3. 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.
Mon 3/232:25 pm
PIT
- STL
1 stop5h 30m
Southwest
Wed 3/2510:15 am
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 3/3![Southwest logo]()
$272
This American Airlines deal was found by Cheapflights users on 3/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/297:31 am
PIT
- STL
1 stop7h 12m
American Airlines
Sun 4/56:00 am
STL
- PIT
1 stop4h 17m
American Airlines
Deal found 3/1![American Airlines logo]()
$271
This American Airlines deal was found by Cheapflights users on 3/5. 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.
Wed 4/13:16 pm
PIT
- STL
1 stop9h 28m
American Airlines
Tue 4/76:00 am
STL
- PIT
1 stop9h 48m
American Airlines
Deal found 3/5![American Airlines logo]()
$243
This United Airlines deal was found by Cheapflights users on 3/4. 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.
Wed 4/16:10 am
PIT
- STL
1 stop5h 18m
United Airlines
Tue 4/711:15 am
STL
- PIT
1 stop5h 29m
United Airlines
Deal found 3/4![United Airlines logo]()
$251
This Southwest deal was found by Cheapflights users on 3/4. 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 4/17:05 pm
PIT
- STL
Nonstop1h 55m
Southwest
Tue 4/76:45 pm
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 3/4![Southwest logo]()
$269
This United Airlines deal was found by Cheapflights users on 3/5. 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 4/95:55 pm
PIT
- STL
1 stop4h 18m
United Airlines
Sun 4/127:45 am
STL
- PIT
1 stop6h 41m
United Airlines
Deal found 3/5![United Airlines logo]()
$247
This Delta deal was found by Cheapflights users on 3/2. 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.
Mon 4/137:46 pm
PIT
- STL
1 stop4h 50m
Delta
Sat 4/185:59 pm
STL
- PIT
1 stop3h 57m
Delta
Deal found 3/2![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 3/3. 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.
Fri 4/244:20 pm
PIT
- STL
1 stop8h 20m
Southwest
Tue 4/286:45 pm
STL
- PIT
Nonstop1h 35m
Southwest
Deal found 3/3![Southwest logo]()
$268
This Delta deal was found by Cheapflights users on 3/6. 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.
Thu 4/306:40 am
PIT
- STL
1 stop4h 02m
Delta
Tue 5/55:59 pm
STL
- PIT
1 stop3h 57m
Delta
Deal found 3/6![Delta logo]()
$281
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 March 6, 2026.
Search for one-way flight options from Pittsburgh to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 6, 2026.
This Priceline deal was found by Cheapflights users on 3/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/273:00 pm
PIT
- STL
1 stop9h 19m
Frontier
Deal found 3/2![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 3/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/54:30 pm
PIT
- STL
1 stop8h 27m
Frontier
Deal found 3/2![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 3/3. 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.
Sat 5/212:44 pm
PIT
- STL
1 stop11h 35m
Frontier
Deal found 3/3![Frontier logo]()
$107
This Delta deal was found by Cheapflights users on 3/1. 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.
Sat 8/297:00 am
PIT
- STL
1 stop6h 53m
Delta
Deal found 3/1![Delta logo]()
$112
This Frontier deal was found by Cheapflights users on 3/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/37:40 pm
PIT
- STL
1 stop13h 11m
Frontier
Deal found 3/2![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 3/4. 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.
Tue 4/1410:45 am
PIT
- STL
2 stops21h 05m
Multiple Airlines
Deal found 3/4![Multiple Airlines logo]()
$123
This Delta deal was found by Cheapflights users on 3/4. 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.
Sat 4/46:30 am
PIT
- STL
1 stop4h 16m
Delta
Deal found 3/4![Delta logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 3/4. 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.
Tue 4/286:35 am
PIT
- STL
2 stops25h 15m
Multiple Airlines
Deal found 3/4![Multiple Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 3/4. 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.
Tue 5/56:35 am
PIT
- STL
2 stops25h 15m
Multiple Airlines
Deal found 3/4![Multiple Airlines logo]()
$127
This Delta deal was found by Cheapflights users on 3/4. 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 4/110:26 am
PIT
- STL
1 stop3h 32m
Delta
Deal found 3/4![Delta logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Tue 3/2410:45 am
PIT
- STL
3 stops24h 04m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$132
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 March 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $243 (American Airlines) |
One-way from | $80 (Priceline) |
Popular in | October |
Cheapest in | November |
Average price | $387 |
Good round-trip deal | $337 or less |
Good one-way deal | $171 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 March 6, 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
Fri 5/8
7:15 pm-11:57 pm
1 stop5h 42m
Lambert-St Louis
Tue 5/12
10:25 am-4:51 pm
1 stop5h 26m
$267
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Fri 4/10
6:50 pm-11:55 pm
1 stop6h 05m
Lambert-St Louis
Sun 4/12
5:25 am-10:00 am
1 stop3h 35m
$267
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Wed 5/27
12:01 pm-5:46 pm
1 stop6h 45m
Lambert-St Louis
Sun 5/31
6:00 am-12:45 pm
1 stop5h 45m
$267
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Fri 4/24
6:50 pm-11:55 pm
1 stop6h 05m
Lambert-St Louis
Mon 4/27
10:15 am-6:10 pm
2 stops6h 55m
$272
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Thu 3/19
8:45 pm-12:05 am
1 stop4h 20m
Lambert-St Louis
Mon 3/23
4:45 pm-9:25 pm
1 stop3h 40m
$275
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Thu 4/30
6:40 am-9:42 am
1 stop4h 02m
Lambert-St Louis
Tue 5/5
5:59 pm-10:56 pm
1 stop3h 57m
$281
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Thu 4/9
8:05 pm-8:55 pm
Nonstop1h 50m
Lambert-St Louis
Sat 4/11
8:45 am-4:25 pm
1 stop6h 40m
$283
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Fri 5/22
7:50 pm-11:59 pm
1 stop5h 09m
Lambert-St Louis
Tue 5/26
6:04 pm-10:38 pm
1 stop3h 34m
$287
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Thu 5/21
6:25 pm-11:59 pm
1 stop6h 34m
Lambert-St Louis
Mon 5/25
7:01 pm-12:45 am
1 stop4h 44m
$287
Quickest round-trip
PittsburghSt. Louis
PIT - STL
PITSTL
Pittsburgh
Fri 5/15
8:10 pm-11:15 pm
1 stop4h 05m
Lambert-St Louis
Mon 5/18
5:40 am-10:00 am
1 stop3h 20m
$287
Showing 1-10 of 21 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 March.
| 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?
Use this chart to determine the optimal time to book a round-trip flight from Pittsburgh to St. Louis. Price data was last updated on February 27, 2026.
Booking 29 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, November is the cheapest month in which you can book a flight from Pittsburgh to St. Louis (average of $156). Flying from Pittsburgh to St. Louis in March is currently the most expensive (average of $278). 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 March 6, 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 27% 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 March 6, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United 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.
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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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 March 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$170 | Average$346 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$241 | Average$330 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$279 | Average$436 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$291 | Average$418 | FlexibilityNo cancel fee | On-timeN/A |