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.

$43 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

Sat, Oct 3 - Mon, Oct 5

2:32 pm - 4:34 pmPIT Pittsburgh-STL Lambert-St Louis

27h 02m1 stop Orlando

5:19 pm - 1:47 pmSTL Lambert-St Louis-PIT Pittsburgh

19h 28m1 stop Orlando

$190Frontier

Tue, Oct 20 - Wed, Oct 21

7:15 pm - 8:00 pmPIT Pittsburgh-STL Lambert-St Louis

1h 45mnonstop

6:30 pm - 9:10 pmSTL Lambert-St Louis-PIT Pittsburgh

1h 40mnonstop

$200Southwest

Tue, Oct 13 - Tue, Oct 20

7:15 pm - 8:00 pmPIT Pittsburgh-STL Lambert-St Louis

1h 45mnonstop

6:30 pm - 9:10 pmSTL Lambert-St Louis-PIT Pittsburgh

1h 40mnonstop

$200Southwest

Tue, Oct 20 - Wed, Oct 21

1:05 pm - 5:08 pmPIT Pittsburgh-STL Lambert-St Louis

5h 03m1 stop Philadelphia

6:01 am - 12:36 pmSTL Lambert-St Louis-PIT Pittsburgh

5h 35m1 stop New York LaGuardia

$207American Airlines

Wed, Oct 28 - Sat, Oct 31

6:05 am - 10:51 amPIT Pittsburgh-STL Lambert-St Louis

5h 46m1 stop Chicago O'Hare Intl

9:16 am - 4:05 pmSTL Lambert-St Louis-PIT Pittsburgh

5h 49m1 stop New York LaGuardia

$207American Airlines

Thu, Feb 4 - Mon, Feb 8

5:15 pm - 8:37 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

4h 22m1 stop Detroit Metropolitan Wayne County

1:01 pm - 9:05 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

7h 04m1 stop New York LaGuardia

$237Delta

Thu, Oct 1 - Mon, Oct 5

6:20 am - 11:43 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

6h 23m1 stop New York LaGuardia

4:59 pm - 10:54 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

4h 55m1 stop Atlanta Hartsfield-Jackson

$237Delta

Tue, Oct 6 - Tue, Oct 6

8:20 am - 12:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 53m1 stop Chicago O'Hare Intl

7:01 pm - 12:58 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 57m1 stop Chicago O'Hare Intl

$237United Airlines

Mon, Oct 26 - Wed, Oct 28

7:50 am - 5:40 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

10h 50m1 stop Atlanta Hartsfield-Jackson

6:44 pm - 10:21 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

14h 37m2 stops Atlanta Hartsfield-Jackson Orlando

$237Frontier

Sat, Oct 10 - Wed, Oct 14

5:20 pm - 9:21 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 01m1 stop Chicago O'Hare Intl

8:30 am - 11:46 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 16mnonstop

$246United Airlines

Recent last minute flight deals from Pennsylvania to St. Louis

Fri, Sep 18 - Wed, Sep 23

10:27 am - 4:34 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

7h 07m1 stop Orlando

2:29 pm - 12:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

8h 41m1 stop Atlanta Hartsfield-Jackson

$261Frontier

Fri, Sep 18 - Wed, Sep 23

1:06 pm - 7:17 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

7h 11m1 stop Denver Intl

8:10 pm - 12:11 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

15h 01m1 stop Denver Intl

$296Frontier

Sat, Sep 19 - Thu, Oct 1

3:05 pm - 4:52 pmLGA New York LaGuardia-STL Lambert-St Louis

2h 47mnonstop

7:00 am - 10:27 amSTL Lambert-St Louis-LGA New York LaGuardia

2h 27mnonstop

$373Delta

Wed, Sep 16 - Thu, Oct 1

6:20 pm - 8:06 pmLGA New York LaGuardia-STL Lambert-St Louis

2h 46mnonstop

7:00 am - 10:27 amSTL Lambert-St Louis-LGA New York LaGuardia

2h 27mnonstop

$373Delta

Wed, Sep 16 - Wed, Oct 21

12:05 pm - 1:45 pmLGA New York LaGuardia-STL Lambert-St Louis

2h 40mnonstop

5:45 am - 9:05 amSTL Lambert-St Louis-LGA New York LaGuardia

2h 20mnonstop

$423Southwest

Tue, Sep 15 - Thu, Oct 15

5:45 pm - 7:35 pmLGA New York LaGuardia-STL Lambert-St Louis

2h 50mnonstop

7:50 pm - 11:15 pmSTL Lambert-St Louis-LGA New York LaGuardia

2h 25mnonstop

$433Southwest

Fri, Sep 18 - Tue, Sep 22

11:08 am - 5:05 pmPIT Pittsburgh-STL Lambert-St Louis

6h 57m1 stop Philadelphia

1:25 pm - 7:03 pmSTL Lambert-St Louis-PIT Pittsburgh

4h 38m1 stop Philadelphia

$442American Airlines

Fri, Sep 18 - Tue, Sep 22

6:54 pm - 12:27 amMDT Harrisburg-STL Lambert-St Louis

6h 33m1 stop Chicago O'Hare Intl

6:30 am - 2:10 pmSTL Lambert-St Louis-MDT Harrisburg

6h 40m1 stop Philadelphia

$443American Airlines

Sat, Sep 19 - Thu, Oct 1

7:00 pm - 8:47 pmEWR Newark-STL Lambert-St Louis

2h 47mnonstop

7:30 am - 11:00 amSTL Lambert-St Louis-EWR Newark

2h 30mnonstop

$453United Airlines

Wed, Sep 16 - Thu, Oct 1

9:59 pm - 11:38 pmEWR Newark-STL Lambert-St Louis

2h 39mnonstop

9:30 am - 1:08 pmSTL Lambert-St Louis-EWR Newark

2h 38mnonstop

$453United Airlines

Recent direct flight deals from Pennsylvania to St. Louis

Tue, Oct 13 - Tue, Oct 20

7:15 pm - 8:00 pmPIT Pittsburgh-STL Lambert-St Louis

1h 45mnonstop

6:30 pm - 9:10 pmSTL Lambert-St Louis-PIT Pittsburgh

1h 40mnonstop

$200Southwest

Tue, Oct 20 - Wed, Oct 21

7:15 pm - 8:00 pmPIT Pittsburgh-STL Lambert-St Louis

1h 45mnonstop

6:30 pm - 9:10 pmSTL Lambert-St Louis-PIT Pittsburgh

1h 40mnonstop

$200Southwest

Tue, Oct 20 - Thu, Oct 22

7:15 pm - 8:00 pmPIT Pittsburgh-STL Lambert-St Louis

1h 45mnonstop

10:20 am - 12:55 pmSTL Lambert-St Louis-PIT Pittsburgh

1h 35mnonstop

$204Southwest

Tue, Nov 3 - Fri, Nov 6

1:44 pm - 3:21 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 37mnonstop

3:51 pm - 6:54 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 03mnonstop

$246American Airlines

Wed, Oct 21 - Fri, Oct 23

8:26 am - 10:18 amDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 52mnonstop

5:08 pm - 8:18 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 10mnonstop

$246American Airlines

Fri, Dec 11 - Mon, Dec 14

10:55 am - 12:43 pmPHL Philadelphia-STL Lambert-St Louis

2h 48mnonstop

6:02 am - 9:20 amSTL Lambert-St Louis-PHL Philadelphia

2h 18mnonstop

$278American Airlines

Wed, Oct 7 - Wed, Oct 14

6:45 am - 8:29 amLGA New York LaGuardia-STL Lambert-St Louis

2h 44mnonstop

1:02 pm - 4:30 pmSTL Lambert-St Louis-LGA New York LaGuardia

2h 28mnonstop

$293Delta

Wed, Oct 7 - Thu, Oct 8

9:59 am - 11:47 amLGA New York LaGuardia-STL Lambert-St Louis

2h 48mnonstop

1:02 pm - 4:30 pmSTL Lambert-St Louis-LGA New York LaGuardia

2h 28mnonstop

$293Delta

Sat, Nov 14 - Wed, Nov 18

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

$297United Airlines

Thu, Oct 29 - Sat, Oct 31

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

$297United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$43

Best time to beat the crowds with an average 7% drop in price.

Most popular time to fly with an average 9% 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.