How does KAYAK find such low prices on flights from Pennsylvania to St. Louis?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to St. Louis.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to St. Louis?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Pennsylvania to St. Louis?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Pennsylvania with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to St. Louis?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$60 CHEAP FLIGHTS from Pennsylvania to St. Louis

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Flight Deals

Cheap Flights from Pennsylvania to St. Louis

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Pennsylvania to St. Louis

Mon, Nov 16 - Thu, Nov 19

6:30 pm - 7:25 pmPIT Pittsburgh-STL Lambert-St Louis

1h 55mnonstop

6:15 pm - 8:55 pmSTL Lambert-St Louis-PIT Pittsburgh

1h 40mnonstop

$211Southwest

Tue, Dec 8 - Thu, Dec 10

6:30 pm - 7:25 pmPIT Pittsburgh-STL Lambert-St Louis

1h 55mnonstop

10:15 am - 12:45 pmSTL Lambert-St Louis-PIT Pittsburgh

1h 30mnonstop

$218Southwest

Mon, Dec 7 - Thu, Dec 10

8:21 pm - 12:02 amPIT Pittsburgh-STL Lambert-St Louis

4h 41m1 stop Chicago O'Hare Intl

5:02 am - 12:28 pmSTL Lambert-St Louis-PIT Pittsburgh

6h 26m1 stop Chicago O'Hare Intl

$219American Airlines

Tue, Dec 8 - Thu, Dec 10

5:32 pm - 9:41 pmPIT Pittsburgh-STL Lambert-St Louis

5h 09m1 stop Washington, D.C. Reagan-National

7:27 am - 12:28 pmSTL Lambert-St Louis-PIT Pittsburgh

4h 01m1 stop Chicago O'Hare Intl

$219American Airlines

Fri, Dec 11 - Sun, Dec 13

6:28 pm - 12:12 amPIT Pittsburgh-STL Lambert-St Louis

6h 44m1 stop Orlando

6:20 pm - 5:33 pmSTL Lambert-St Louis-PIT Pittsburgh

22h 13m1 stop Orlando

$242Frontier

Sat, Jan 23 - Tue, Jan 26

1:00 pm - 6:41 pmPIT Pittsburgh-STL Lambert-St Louis

6h 41m1 stop Atlanta Hartsfield-Jackson

5:45 pm - 11:13 pmSTL Lambert-St Louis-PIT Pittsburgh

4h 28m1 stop Detroit Metropolitan Wayne County

$267Delta

Mon, Jan 25 - Tue, Jan 26

5:40 am - 9:17 amPIT Pittsburgh-STL Lambert-St Louis

4h 37m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:55 amSTL Lambert-St Louis-PIT Pittsburgh

4h 55m1 stop Atlanta Hartsfield-Jackson

$267Delta

Sat, Jan 23 - Mon, Jan 25

8:40 am - 12:13 pmPIT Pittsburgh-STL Lambert-St Louis

4h 33m1 stop Chicago O'Hare Intl

7:29 am - 2:47 pmSTL Lambert-St Louis-PIT Pittsburgh

6h 18m1 stop Chicago O'Hare Intl

$267United Airlines

Thu, Jan 14 - Fri, Jan 15

7:06 am - 12:04 amPHL Philadelphia-STL Lambert-St Louis

17h 58m1 stop Orlando

9:42 am - 8:46 pmSTL Lambert-St Louis-PHL Philadelphia

10h 04m1 stop Orlando

$277Frontier

Fri, Jan 29 - Sun, Jan 31

8:40 am - 12:13 pmPIT Pittsburgh-STL Lambert-St Louis

4h 33m1 stop Chicago O'Hare Intl

9:05 am - 2:47 pmSTL Lambert-St Louis-PIT Pittsburgh

4h 42m1 stop Chicago O'Hare Intl

$301United Airlines

Recent last minute flight deals from Pennsylvania to St. Louis

Sun, Nov 1 - Wed, Nov 4

6:00 am - 12:50 pmPHL Philadelphia-STL Lambert-St Louis

7h 50m1 stop Dallas/Fort Worth

6:44 pm - 7:11 amSTL Lambert-St Louis-PHL Philadelphia

11h 27m1 stop Atlanta Hartsfield-Jackson

$320Frontier

Mon, Nov 2 - Fri, Nov 6

5:15 am - 11:16 pmPHL Philadelphia-STL Lambert-St Louis

19h 01m1 stop Orlando

4:26 pm - 12:35 amSTL Lambert-St Louis-PHL Philadelphia

7h 09m1 stop Orlando

$340Frontier

Wed, Oct 28 - Sat, Oct 31

4:01 pm - 8:57 pmPIT Pittsburgh-STL Lambert-St Louis

5h 56m1 stop Chicago O'Hare Intl

7:29 am - 12:28 pmSTL Lambert-St Louis-PIT Pittsburgh

3h 59m1 stop Chicago O'Hare Intl

$395American Airlines

Sun, Nov 1 - Sat, Nov 7

2:58 pm - 1:31 pmPHL Philadelphia-STL Lambert-St Louis

23h 33m2 stops Nashville Intl Jonesboro

4:26 pm - 12:35 amSTL Lambert-St Louis-PHL Philadelphia

7h 09m1 stop Orlando

$395Multiple Airlines

Fri, Oct 30 - Sun, Nov 1

6:08 am - 10:51 amMDT Harrisburg-STL Lambert-St Louis

5h 43m1 stop Chicago O'Hare Intl

6:02 am - 1:29 pmSTL Lambert-St Louis-MDT Harrisburg

6h 27m1 stop Philadelphia

$429American Airlines

Sun, Nov 1 - Wed, Nov 4

6:00 am - 12:50 pmPHL Philadelphia-STL Lambert-St Louis

7h 50m1 stop Dallas/Fort Worth

2:00 pm - 9:30 amSTL Lambert-St Louis-PHL Philadelphia

18h 30m3 stops Jonesboro Nashville Intl Orlando

$443Multiple Airlines

Thu, Oct 29 - Sat, Oct 31

6:25 am - 7:45 amPHL Philadelphia-STL Lambert-St Louis

2h 20mnonstop

2:30 pm - 5:40 pmSTL Lambert-St Louis-PHL Philadelphia

2h 10mnonstop

$662Southwest

Sun, Nov 1 - Sat, Nov 7

6:00 am - 7:40 amPHL Philadelphia-STL Lambert-St Louis

2h 40mnonstop

5:10 pm - 8:20 pmSTL Lambert-St Louis-PHL Philadelphia

2h 10mnonstop

$662Southwest

Thu, Oct 29 - Sun, Nov 1

2:10 pm - 6:09 pmMDT Harrisburg-STL Lambert-St Louis

4h 59m1 stop Chicago O'Hare Intl

6:00 am - 1:58 pmSTL Lambert-St Louis-MDT Harrisburg

6h 58m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

$858United Airlines

Fri, Oct 30 - Sun, Nov 1

8:15 am - 12:10 pmMDT Harrisburg-STL Lambert-St Louis

4h 55m1 stop Chicago O'Hare Intl

6:00 am - 1:58 pmSTL Lambert-St Louis-MDT Harrisburg

6h 58m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

$858United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$60

Best time to beat the crowds with an average 9% drop in price.

Most popular time to fly with an average 5% increase in price.

Flight from Philadelphia to St. Louis

How does KAYAK find such low prices on flights from Pennsylvania to St. Louis?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to St. Louis.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to St. Louis?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Pennsylvania to St. Louis?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Pennsylvania with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to St. Louis?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.