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$54+ Cheap flights from Pennsylvania to St. Louis (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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STL
dic. 23 — dic. 301
lun. 12/23
lun. 12/30
1 adult, Economy
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Cheap flight deals from Pennsylvania to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Pennsylvania (USPA) 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 diciembre 18, 2024.

Round-trip from

$138
(FlightHub)

One-way from

$54
(Mytrip)
From Pennsylvania to Lambert-St Louis
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One-way flight from Pennsylvania to Lambert-St Louis
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Find flight deals from Pennsylvania to St. Louis

Cheapest flights from Pennsylvania to St. Louis
Explore the most affordable flight options available from Pennsylvania to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 18, 2024.

This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3110:50 amLGA - STL
1 stop13h 38mFrontier
lun. 1/65:45 pmSTL - LGA
1 stop21h 11mFrontier
Deal found 12/16$238
This Booking.com deal was found by Cheapflights users on 12/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/313:00 pmJFK - STL
1 stop9h 28mFrontier
mié. 1/85:05 pmSTL - JFK
1 stop19h 54mFrontier
Deal found 12/17$248
This Southwest deal was found by Cheapflights users on 12/16. 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.
mar. 12/316:55 pmLGA - STL
Nonstop2h 50mSouthwest
lun. 1/66:15 amSTL - LGA
Nonstop2h 25mSouthwest
Deal found 12/16$255
This American Airlines deal was found by Cheapflights users on 12/17. 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.
mar. 12/315:38 pmABE - STL
1 stop5h 15mAmerican Airlines
jue. 1/25:03 amSTL - ABE
1 stop5h 46mAmerican Airlines
Deal found 12/17$258
This American Airlines deal was found by Cheapflights users on 12/17. 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.
mar. 12/316:10 amMDT - STL
2 stops8h 27mAmerican Airlines
vie. 1/32:27 pmSTL - MDT
1 stop6h 26mAmerican Airlines
Deal found 12/17$263
This American Airlines deal was found by Cheapflights users on 12/16. 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.
mar. 12/316:10 amLGA - STL
1 stop7h 40mAmerican Airlines
lun. 1/611:57 amSTL - LGA
Nonstop2h 23mAmerican Airlines
Deal found 12/16$284
This FlightHub deal was found by Cheapflights users on 12/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/195:05 amPHL - STL
1 stop19h 23mFrontier
lun. 12/235:45 pmSTL - PHL
1 stop16h 56mFrontier
Deal found 12/17$300
This American Airlines deal was found by Cheapflights users on 12/18. 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.
sáb. 12/217:00 pmAVP - STL
1 stop6h 01mAmerican Airlines
mar. 12/315:03 amSTL - AVP
1 stop5h 15mAmerican Airlines
Deal found 12/18$323
This Mytrip deal was found by Cheapflights users on 12/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/318:35 amLGA - STL
2 stops28h 10mMultiple Airlines
lun. 1/62:00 pmSTL - LGA
2 stops23h 24mMultiple Airlines
Deal found 12/16$328
This United Airlines deal was found by Cheapflights users on 12/16. 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.
lun. 12/306:14 pmEWR - STL
Nonstop2h 57mUnited Airlines
mié. 1/86:30 amSTL - EWR
1 stop4h 58mUnited Airlines
Deal found 12/16$333
This Mytrip deal was found by Cheapflights users on 12/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/306:00 pmEWR - STL
2 stops22h 21mSpirit Airlines
mar. 1/74:27 pmSTL - EWR
1 stop15h 33mSpirit Airlines
Deal found 12/16$336
This Delta deal was found by Cheapflights users on 12/17. 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.
jue. 12/195:45 pmMDT - STL
1 stop4h 57mDelta
dom. 12/225:17 pmSTL - MDT
1 stop5h 16mDelta
Deal found 12/17$338

Find flights from Pennsylvania to St. Louis within your budget

Customize your flight search to find flights from Pennsylvania 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 diciembre 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

vie. 2/28

8:36 pm-11:43 pm

1 stop28h 07m

Lambert-St Louis

dom. 3/2

5:20 pm-11:35 am

1 stop17h 15m

$138

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

sáb. 1/11

1:33 pm-11:27 pm

1 stop10h 54m

Lambert-St Louis

dom. 1/19

8:22 am-6:52 pm

1 stop9h 30m

$138

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

jue. 1/16

5:45 am-10:24 am

1 stop5h 39m

Lambert-St Louis

jue. 1/23

6:00 am-11:21 am

1 stop4h 21m

$168

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

vie. 1/17

7:30 pm-11:46 pm

1 stop5h 16m

Lambert-St Louis

lun. 1/20

6:00 am-1:00 pm

1 stop6h 00m

$226

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

jue. 1/9

8:37 am-10:24 am

Nonstop2h 47m

Lambert-St Louis

dom. 1/12

6:00 am-9:20 am

Nonstop2h 20m

$230

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

jue. 1/2

7:00 am-8:13 am

1 stop26h 13m

Lambert-St Louis

dom. 1/5

10:09 pm-9:59 pm

1 stop22h 50m

$232

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

sáb. 1/18

6:00 am-11:17 am

1 stop6h 17m

Lambert-St Louis

lun. 1/20

7:20 am-10:49 am

Nonstop2h 29m

$233

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

dom. 1/19

2:50 pm-4:53 pm

Nonstop3h 03m

Lambert-St Louis

sáb. 2/1

8:50 am-12:16 pm

Nonstop2h 26m

$234

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

lun. 2/3

6:52 pm-2:43 pm

1 stop20h 51m

Lambert-St Louis

jue. 2/6

4:28 pm-11:04 am

1 stop17h 36m

$236

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

lun. 1/20

3:00 pm-11:31 pm

1 stop9h 31m

Lambert-St Louis

mar. 1/21

5:05 pm-1:59 pm

1 stop19h 54m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 60 results
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Best time to book a flight from Pennsylvania to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Pennsylvania with our price prediction graph.
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.

Travel insights for flights from Pennsylvania to St. Louis

Get recent, data-driven insights about flights from Pennsylvania to St. Louis including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Pennsylvania to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Pennsylvania to St. Louis (average of $311). Flying from Pennsylvania to St. Louis in March is currently the most expensive (average of $356). 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 PA to STL?

Find hourly flight availability from Pennsylvania 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 diciembre 18, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Pennsylvania to St. Louis as you normally would.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 diciembre 18, 2024.
To help decide which airline to fly from Pennsylvania to St. Louis, see what other customers have to say about Frontier, American Airlines and Spirit Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,848 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,552 reviews
Southwest
8.1
Very good
4,848 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,848 reviews

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Pennsylvania to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Pennsylvania?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Pennsylvania.

  • How popular is this Pennsylvania to St. Louis flight route?

    Flights from Pennsylvania to Lambert-St Louis have been viewed 15 times in the past calendar month.

  • What are the cheapest airlines to fly from Pennsylvania to St. Louis one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $54. Users have also found prices from $69 and $84 on Spirit Airlines and American Airlines, respectively.

  • What are the most popular routes from Pennsylvania to St. Louis?

    While some choose either New York LaGuardia - Lambert-St Louis or New York John F Kennedy Intl - Lambert-St Louis, Newark - Lambert-St Louis is the most popular route from Pennsylvania to St. Louis.

  • What are the most reliable airlines from Pennsylvania to St. Louis?

    Consider PSA Airlines (88%), Southwest (85%) or Qatar Airways (85%) when booking your flight. These represent the most reliable airlines when flying from Pennsylvania to St. Louis.

  • What are the cheapest flights from Pennsylvania to St. Louis?

    The cheapest flight price from Pennsylvania to St. Louis is $169. On average you can expect to pay $636. The most popular route, (Newark - Lambert-St Louis), can usually be booked for $153.

  • Can I find deals for flights from Pennsylvania to St. Louis that include hotel bookings?

    Yes. In addition to deals on Pennsylvania to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pennsylvania to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pennsylvania to St. Louis.

  • Can I find deals for business class flights from Pennsylvania to St. Louis?

    Yes. Cheapflights offers flight deals from Pennsylvania to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Pennsylvania to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Pennsylvania to St. Louis (average of $311). Flying from Pennsylvania to St. Louis in March is currently the most expensive (average of $356). 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.

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Alternative routes for Pennsylvania to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Newark to St. Louis flights
LaGuardia to Kansas City flights
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O'Hare Intl to St. Louis flights
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Reagan-National to Kansas City flights
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Hobby to St. Louis flights
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Salt Lake City to St. Louis flights

Top 6 airlines flying from Pennsylvania to St. Louis

Discover the top 6 airlines that operate flights from Pennsylvania 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 diciembre 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$98FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$142Average$356FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$169Average$281FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$196Average$441FlexibilityNo cancel feeOn-time69%
DeltaCheapest$200Average$391FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$241Average$388FlexibilityNo cancel feeOn-time63%
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