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

Flights from Pennsylvania to Lambert-St Louis have been viewed 31 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 Spirit Airlines. According to our data, you can fly for as low as $74. Users have also found prices from $80 and $90 on Frontier and United 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 cheapest flights from Pennsylvania to St. Louis?

The cheapest flight price from Pennsylvania to St. Louis is $134. On average you can expect to pay $310. The most popular route, (Newark - Lambert-St Louis), can usually be booked for $176.

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

Consider Southwest (81%), Aer Lingus (70%) or Republic Airways (67%) when booking your flight. These represent the most reliable airlines when flying from Pennsylvania to St. Louis.

What are the most popular airlines that fly from Pennsylvania to St. Louis?

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Pennsylvania to St. Louis.

How far in advance should I book a flight from Pennsylvania to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 53 days in advance, which can save you up to 65% on flights from Pennsylvania to St. Louis compared to booking the week you need them. Waiting 53 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $197. For sooner than that we have options available in the next 3 days from $296.

What is the cheapest month to fly from Pennsylvania to St. Louis?

July is one of the best times of the year to fly to St. Louis from Pennsylvania. Prices for July average $341 per person but you can even find prices for as low as $58. The most expensive prices can be found in the month of April. Opting for a July flight can save you 29% on your journey compared to booking in April

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.

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.

$74+ Flights from Pennsylvania to St. Louis

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Cheap flight deals from Pennsylvania to St. Louis

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$181 (CheapOair)
One-way from	$74 (Mytrip)
Popular in	April
Cheapest in	July
Average price	$440
Good round-trip deal	$277 or less
Good one-way deal	$135 or less

Provider with most accurate pricing for Philadelphia-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for Philadelphia-Lambert-St Louis flights.

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From Pennsylvania to Lambert-St Louis

Search Deals

One-way flight from Pennsylvania to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($64 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Pennsylvania to Lambert-St Louis.

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Price to beat on a 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 April 15, 2025.

Tue 5/65:25 amPIT - STL

1 stop8h 42mAmerican Airlines

Wed 5/710:31 amSTL - PIT

1 stop7h 26mAmerican Airlines

Deal found 4/15

$184

Tue 5/1310:00 pmLGA - STL

1 stop27h 06mFrontier

Mon 5/195:45 pmSTL - LGA

1 stop26h 14mFrontier

Deal found 4/14

$198

Tue 4/2211:03 amJFK - STL

1 stop14h 01mFrontier

Fri 4/259:55 pmSTL - JFK

1 stop30h 35mFrontier

Deal found 4/14

$198

Wed 5/216:00 amLGA - STL

1 stop28h 15mSpirit Airlines

Sat 5/2410:10 amSTL - LGA

1 stop12h 14mSpirit Airlines

Deal found 4/14

$199

Thu 5/810:00 pmLGA - STL

1 stop27h 14mMultiple Airlines

Sat 5/1010:10 amSTL - LGA

1 stop12h 14mMultiple Airlines

Deal found 4/14

$203

Wed 5/145:55 amLGA - STL

1 stop4h 54mAmerican Airlines

Wed 5/1412:03 pmSTL - LGA

Nonstop2h 26mAmerican Airlines

Deal found 4/13

$214

Fri 7/410:07 amIAD - STL

1 stop5h 30mDelta

Sat 7/56:40 amSTL - IAD

1 stop3h 53mDelta

Deal found 4/14

$217

Sun 5/258:59 amDCA - STL

1 stop6h 36mDelta

Sat 5/3112:59 pmSTL - DCA

1 stop4h 23mDelta

Deal found 4/13

$217

Sun 5/185:26 pmIAD - STL

1 stop7h 40mFrontier

Wed 5/215:45 pmSTL - IAD

1 stop17h 47mFrontier

Deal found 4/15

$218

Sat 5/241:44 pmDCA - STL

1 stop5h 23mAmerican Airlines

Wed 5/2810:25 amSTL - DCA

Nonstop1h 59mAmerican Airlines

Deal found 4/14

$219

Wed 5/146:30 amLGA - STL

Nonstop2h 37mDelta

Wed 5/216:45 pmSTL - LGA

Nonstop2h 30mDelta

Deal found 4/14

$221

Fri 5/95:06 pmMDT - STL

1 stop17h 09mMultiple Airlines

Sun 5/1110:10 amSTL - MDT

1 stop29h 06mMultiple Airlines

Deal found 4/15

$222

Best flights from Pennsylvania to St. Louis
Discover carefully curated flight deals from Pennsylvania to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 15, 2025.

Tue 5/66:00 amLGA - STL

1 stop12h 15mMultiple Airlines

Fri 5/95:55 pmSTL - LGA

1 stop26h 04mMultiple Airlines

Deal found 4/15

$181

Tue 5/65:25 amPIT - STL

1 stop8h 42mAmerican Airlines

Wed 5/710:31 amSTL - PIT

1 stop7h 26mAmerican Airlines

Deal found 4/15

$184

Tue 5/66:59 amJFK - STL

1 stop18h 07mFrontier

Fri 5/95:55 pmSTL - JFK

1 stop15h 30mFrontier

Deal found 4/15

$190

Wed 5/216:00 amLGA - STL

1 stop28h 15mSpirit Airlines

Sat 5/2410:10 amSTL - LGA

1 stop12h 14mSpirit Airlines

Deal found 4/14

$199

Fri 7/410:07 amIAD - STL

1 stop5h 30mDelta

Sat 7/56:40 amSTL - IAD

1 stop3h 53mDelta

Deal found 4/14

$217

Sat 5/245:10 pmIAD - STL

1 stop6h 35mUnited Airlines

Tue 5/275:00 amSTL - IAD

1 stop5h 55mUnited Airlines

Deal found 4/14

$224

Tue 5/64:00 pmPIT - STL

Nonstop1h 45mSouthwest

Wed 5/712:45 pmSTL - PIT

Nonstop1h 35mSouthwest

Deal found 4/15

$225

Thu 5/1511:42 amEWR - STL

1 stop24h 55mSun Country Air

Sun 5/187:30 amSTL - EWR

1 stop26h 14mSun Country Air

Deal found 4/15

$365

Tue 5/1310:00 pmLGA - STL

1 stop27h 06mFrontier

Mon 5/195:45 pmSTL - LGA

1 stop26h 14mFrontier

Deal found 4/14

$198

Wed 5/145:55 amLGA - STL

1 stop4h 54mAmerican Airlines

Wed 5/1412:03 pmSTL - LGA

Nonstop2h 26mAmerican Airlines

Deal found 4/13

$214

Sun 5/258:59 amDCA - STL

1 stop6h 36mDelta

Sat 5/3112:59 pmSTL - DCA

1 stop4h 23mDelta

Deal found 4/13

$217

Fri 5/95:06 pmMDT - STL

1 stop17h 09mMultiple Airlines

Sun 5/1110:10 amSTL - MDT

1 stop29h 06mMultiple Airlines

Deal found 4/15

$222

Last-minute flights from Pennsylvania to St. Louis
Discover last-minute flight deals from Pennsylvania to St. Louis. Data last updated April 15, 2025 and is based on user searches.

Sun 4/2010:00 pmLGA - STL

1 stop26h 46mMultiple Airlines

Fri 6/206:12 pmSTL - LGA

1 stop4h 05mMultiple Airlines

Deal found 4/15

$276

Sun 4/2011:45 amIAD - STL

1 stop13h 01mFrontier

Sat 5/105:45 pmSTL - IAD

1 stop21h 51mFrontier

Deal found 4/14

$280

Sun 4/206:55 pmLGA - STL

Nonstop2h 52mAmerican Airlines

Fri 6/206:04 amSTL - LGA

Nonstop2h 26mAmerican Airlines

Deal found 4/15

$301

Tue 4/2211:03 amJFK - STL

1 stop14h 01mFrontier

Fri 4/259:55 pmSTL - JFK

1 stop30h 35mFrontier

Deal found 4/14

$198

Tue 4/2210:00 pmLGA - STL

1 stop27h 04mFrontier

Fri 4/255:41 pmSTL - LGA

1 stop26h 18mFrontier

Deal found 4/14

$218

Tue 4/2212:59 pmLGA - STL

Nonstop2h 47mDelta

Wed 4/236:59 pmSTL - LGA

Nonstop2h 23mDelta

Deal found 4/14

$275

Tue 4/226:10 amLGA - STL

1 stop6h 40mSouthwest

Wed 4/237:45 pmSTL - LGA

Nonstop2h 25mSouthwest

Deal found 4/14

$285

Tue 4/229:00 pmEWR - STL

Nonstop3h 15mUnited Airlines

Wed 4/235:35 pmSTL - EWR

1 stop6h 23mUnited Airlines

Deal found 4/14

$285

Tue 4/2211:25 amLGA - STL

1 stop5h 22mUnited Airlines

Wed 4/239:39 amSTL - LGA

1 stop5h 34mUnited Airlines

Deal found 4/14

$290

Tue 4/227:59 amEWR - STL

1 stop4h 46mDelta

Tue 4/296:50 amSTL - EWR

1 stop4h 10mDelta

Deal found 4/14

$295

Wed 4/2312:55 pmJFK - STL

1 stop4h 52mDelta

Sat 4/2610:30 amSTL - JFK

1 stop7h 07mDelta

Deal found 4/14

$295

Thu 4/2410:15 pmEWR - STL

2 stops21h 26mMultiple Airlines

Mon 4/289:50 amSTL - EWR

3 stops33h 14mMultiple Airlines

Deal found 4/14

$282

One-way flights from Pennsylvania to St. Louis
Search for one-way flight options from Pennsylvania to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 15, 2025.

Wed 5/217:00 amPIT - STL

1 stop27h 15mSpirit Airlines

Deal found 4/14

$74

Fri 5/96:14 pmPIT - STL

1 stop7h 00mFrontier

Deal found 4/14

$80

Wed 5/285:39 pmEWR - STL

1 stop16h 36mSpirit Airlines

Deal found 4/15

$83

Fri 5/167:59 pmLGA - STL

1 stop14h 16mSpirit Airlines

Deal found 4/14

$89

Sat 4/265:35 pmIAD - STL

1 stop7h 29mFrontier

Deal found 4/14

$89

Wed 4/234:28 pmPHL - STL

1 stop8h 36mFrontier

Deal found 4/15

$89

Sun 5/258:40 amIAD - STL

Nonstop2h 16mUnited Airlines

Deal found 4/14

$90

Sat 5/246:50 pmDCA - STL

Nonstop2h 15mSouthwest

Deal found 4/14

$90

Wed 6/47:00 amPHL - STL

1 stop27h 15mSpirit Airlines

Deal found 4/14

$91

Sat 5/1010:00 pmLGA - STL

1 stop27h 06mFrontier

Deal found 4/15

$92

Sat 5/106:59 amJFK - STL

1 stop18h 07mFrontier

Deal found 4/15

$92

Tue 4/221:00 pmDCA - STL

1 stop22h 01mFrontier

Deal found 4/14

$96

Cheapflights Fare Finder

Use the filters below to find and compare flights from Pennsylvania to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Tue 5/6

5:25 am-1:07 pm

1 stop8h 42m

Lambert-St Louis

Wed 5/7

6:00 am-3:45 pm

1 stop8h 45m

$183

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Tue 5/13

10:00 pm-12:06 am

1 stop27h 06m

Lambert-St Louis

Mon 5/19

5:45 pm-8:59 pm

1 stop26h 14m

$198

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

Tue 4/22

11:03 am-12:04 am

1 stop14h 01m

Lambert-St Louis

Fri 4/25

9:55 pm-5:30 am

1 stop30h 35m

$198

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Wed 5/21

6:00 am-9:15 am

1 stop28h 15m

Lambert-St Louis

Sat 5/24

10:10 am-11:24 pm

1 stop12h 14m

$199

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Thu 5/8

10:00 pm-12:14 am

1 stop27h 14m

Lambert-St Louis

Sat 5/10

10:10 am-11:24 pm

1 stop12h 14m

$203

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Wed 5/14

5:55 am-9:49 am

1 stop4h 54m

Lambert-St Louis

Wed 5/14

12:03 pm-3:29 pm

Nonstop2h 26m

$214

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 7/4

10:07 am-2:37 pm

1 stop5h 30m

Lambert-St Louis

Sat 7/5

6:40 am-11:33 am

1 stop3h 53m

$217

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sun 5/25

8:59 am-2:35 pm

1 stop6h 36m

Lambert-St Louis

Sat 5/31

12:59 pm-6:22 pm

1 stop4h 23m

$217

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sun 5/18

5:26 pm-12:06 am

1 stop7h 40m

Lambert-St Louis

Wed 5/21

5:45 pm-12:32 pm

1 stop17h 47m

$218

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sat 5/24

1:44 pm-6:07 pm

1 stop5h 23m

Lambert-St Louis

Wed 5/28

10:25 am-1:24 pm

Nonstop1h 59m

$219

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 60 results

...

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.

Cheapflights Insights

Everything you need to know about your flight from Pennsylvania to St. Louis

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?

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.

Weekly flight availability from Pennsylvania to St. Louis

The most flights from USPA to STL are scheduled on a Monday (8 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in St. Louis 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

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

To help decide which airline to fly from Pennsylvania to St. Louis, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,876 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,279 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,917 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,658 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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 31 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 Spirit Airlines. According to our data, you can fly for as low as $74. Users have also found prices from $80 and $90 on Frontier and United 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 Southwest (81%), Aer Lingus (70%) or Republic Airways (67%) 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 $134. On average you can expect to pay $310. The most popular route, (Newark - Lambert-St Louis), can usually be booked for $176.
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.

See more FAQs

Fenton

Maryland Heights

Fairview Heights

Collinsville

Wentzville

Eureka

St. Peters

Festus

Glencoe

Alton

Farmington

Chesterfield

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Top 6 airlines flying from Pennsylvania to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$53	Average$92	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$131	Average$351	FlexibilityNo cancel fee	On-time71%
Spirit Airlines	Cheapest$169	Average$281	FlexibilityNo cancel fee	On-time65%
United Airlines	Cheapest$196	Average$428	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$199	Average$344	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$245	Average$383	FlexibilityNo cancel fee	On-time63%

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$74+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Pennsylvania to St. Louis with Cheapflights

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Cheap flight deals from Pennsylvania to St. Louis

Keep the following information in mind while searching for Pennsylvania to St. Louis flight deals. Data was last updated April 15, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Pennsylvania to St. Louis

Cheapest flights from Pennsylvania to St. LouisExplore 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 April 15, 2025.

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 April 15, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Pennsylvania to St. Louis that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Pennsylvania to St. Louis

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

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 April 15, 2025.

Weekly flight availability from Pennsylvania to St. Louis

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

To help decide which airline to fly from Pennsylvania to St. Louis, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

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

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

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

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

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

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

Traveling to a place near Pennsylvania?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Pennsylvania to St. Louis

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Top 6 airlines flying from Pennsylvania to St. Louis

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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 April 15, 2025.