STL

$51 Find Cheap Flights from Pennsylvania to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 1/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$108
Typical prices: $317-$561
Multiple Airlines
Tue 2/17Wed 2/18
EWR - STL • 1 stop
Cheapest non-stop
$241
Typical prices: $346-$610
United Airlines
Sun 1/18Wed 1/21
EWR - STL • Non-stop
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We hope you love your trip to St. Louis!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Pennsylvania to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Pennsylvania to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Tue, Feb 17 - Wed, Feb 18
Multiple Airlines Logo
6:00 pm - 6:51 am
EWR
-
STL
13h 51m1 stop
Multiple Airlines Logo
8:17 pm - 8:05 am
STL
-
EWR
10h 48m1 stop
$108Multiple Airlines
Tue, Jan 13 - Wed, Jan 14
Frontier Logo
6:00 am - 6:51 am
EWR
-
STL
25h 51m1 stop
Frontier Logo
8:32 pm - 10:30 am
STL
-
EWR
12h 58m1 stop
$110Frontier
Tue, Feb 17 - Sat, Feb 21
Multiple Airlines Logo
10:31 pm - 6:51 am
EWR
-
STL
9h 20m1 stop
Multiple Airlines Logo
8:17 pm - 8:05 am
STL
-
EWR
10h 48m1 stop
$119Multiple Airlines
Tue, Jan 27 - Fri, Jan 30
Frontier Logo
8:25 pm - 11:33 pm
PHL
-
STL
28h 08m1 stop
Frontier Logo
5:42 pm - 2:44 pm
STL
-
PHL
20h 02m1 stop
$128Frontier
Mon, Jan 26 - Tue, Jan 27
Southwest Logo
12:35 pm - 7:05 pm
PIT
-
STL
7h 30m1 stop
Southwest Logo
8:20 am - 3:40 pm
STL
-
PIT
6h 20m1 stop
$164Southwest
Mon, Jan 26 - Tue, Jan 27
Southwest Logo
12:20 pm - 6:45 pm
PIT
-
STL
7h 25m2 stops
Southwest Logo
8:15 am - 12:55 pm
STL
-
PIT
3h 40m1 stop
$204Southwest
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
10:00 am - 5:27 pm
SCE
-
STL
8h 27m2 stops
American Airlines Logo
6:00 am - 1:36 pm
STL
-
SCE
6h 36m1 stop
$255American Airlines
Tue, Jan 13 - Wed, Jan 14
United Airlines Logo
8:40 am - 10:13 am
IAD
-
STL
2h 33mnonstop
United Airlines Logo
12:44 pm - 3:55 pm
STL
-
IAD
2h 11mnonstop
$260United Airlines
Sat, Jan 10 - Mon, Jan 12
American Airlines Logo
7:40 am - 9:24 am
DCA
-
STL
2h 44mnonstop
American Airlines Logo
5:59 pm - 9:10 pm
STL
-
DCA
2h 11mnonstop
$265American Airlines
Sat, Jan 10 - Mon, Jan 12
United Airlines Logo
8:40 am - 10:13 am
IAD
-
STL
2h 33mnonstop
United Airlines Logo
8:30 am - 11:40 am
STL
-
IAD
2h 10mnonstop
$265United Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$51
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Newark Liberty Airport to St. Louis

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?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

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

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

St. Louis (STL)