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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$59 CHEAP FLIGHTS from Pennsylvania to St. Louis

STL

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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, May 30 - Wed, Jun 3

6:08 pm - 9:21 pm

PIT

STL

4h 13m

1 stop

10:20 am - 5:05 pm

STL

PIT

5h 45m

1 stop

$197United Airlines

Wed, May 27 - Wed, Jun 3

8:15 pm - 11:57 pm

PIT

STL

28h 42m

1 stop

5:27 pm - 10:26 pm

STL

PIT

27h 59m

2 stops

$217Multiple Airlines

Mon, May 25 - Mon, Jun 1

8:15 pm - 8:55 am

PIT

STL

37h 40m

2 stops

11:24 am - 7:20 pm

STL

PIT

6h 56m

1 stop

$233Frontier

Wed, May 27 - Sun, May 31

8:15 pm - 5:33 pm

PIT

STL

22h 18m

2 stops

4:19 pm - 7:20 pm

STL

PIT

26h 01m

1 stop

$239Frontier

Tue, Aug 18 - Tue, Aug 25

6:25 am - 7:40 am

PHL

STL

2h 15mnonstop

10:55 am - 2:05 pm

STL

PHL

2h 10mnonstop

$257Southwest

Thu, May 28 - Tue, Jun 2

8:40 am - 10:12 am

DCA

STL

2h 32mnonstop

6:12 pm - 11:54 pm

STL

DCA

4h 42m

1 stop

$261American Airlines

Tue, May 26 - Tue, Jun 2

11:35 am - 3:10 pm

DCA

STL

4h 35m

1 stop

12:40 pm - 8:45 pm

STL

DCA

7h 05m

2 stops

$262Southwest

Thu, May 28 - Tue, Jun 2

12:37 pm - 5:56 pm

IAD

STL

6h 19m

1 stop

9:13 am - 2:10 pm

STL

IAD

3h 57m

1 stop

$271Delta

Tue, Sep 15 - Tue, Sep 22

6:30 am - 12:53 pm

ABE

STL

7h 23m

1 stop

6:00 am - 12:08 pm

STL

ABE

5h 08m

1 stop

$277Delta

Tue, May 19 - Thu, May 21

6:00 am - 9:43 am

LGA

STL

4h 43m

1 stop

6:00 am - 9:33 am

STL

LGA

2h 33mnonstop

$305American Airlines

Useful Info

Low season	January
High season	May
Cheapest flight	$59

Best time to beat the crowds with an average 1% drop in price.

Most popular time to fly with an average 1% increase in price.

Flight from Washington Dulles Airport 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.

O'Fallon

Wentzville

Farmington

Eureka

Litchfield

Grafton

Shrewsbury

Glencoe

Everything you need to know for your flight to St. Louis

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in St. Louis

St. Louis (STL)

STL

$59 Find Cheap Flights from Pennsylvania to St. Louis

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

Cheap Flights from Pennsylvania to St. Louis

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

Recent one-way flight deals from Pennsylvania to St. Louis

Recent last minute flight deals from Pennsylvania to St. Louis

Recent direct flight deals from Pennsylvania to St. Louis

Good to know

FAQs for booking flights from Pennsylvania 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.

Traveling to a place near St. Louis?

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

Cabin class types available on flights to Pennsylvania

Complete your trip to St. Louis with a hotel stay or car rental

Find direct flights for St. Louis

Flights to other popular destinations

Flights from domestic origins to St. Louis

Choose which airport to fly into in St. Louis

Find deals for your return flight