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Missouri

$79+ Cheap flights from Pennsylvania to Missouri

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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STL
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
1 adult, Economy
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Cheap flight deals from Pennsylvania to Missouri

Keep the following information in mind while searching for Pennsylvania to Missouri flight deals. Data was last updated August 11, 2025.

Round-trip from

$183
(United Airlines)

One-way from

$79
(FlightHub)

Popular in

April

Cheapest in

August

Average price

$377

Good round-trip deal

$235 or less

Good one-way deal

$142 or less
From Pennsylvania to Missouri
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One-way flight from Pennsylvania to Missouri
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Highest demand for flights based on searches. 4% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Pennsylvania to Missouri.
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Price to beat on a one-way flight from Pennsylvania to Missouri.
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Find flight deals from Pennsylvania to Missouri

Cheapest flights from Pennsylvania to Missouri
Explore the most affordable flight options available from Pennsylvania to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 11, 2025.

This United Airlines deal was found by Cheapflights users on 8/9. 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.
Sat 9/66:35 amIAD - STL
1 stop6h 50mUnited Airlines
Sat 9/138:15 amSTL - IAD
Nonstop2h 10mUnited Airlines
Deal found 8/9$183
This Priceline deal was found by Cheapflights users on 8/8. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/256:10 amIAD - STL
1 stop7h 46mFrontier
Mon 8/252:01 pmSTL - IAD
1 stop9h 15mFrontier
Deal found 8/8$185
This Priceline deal was found by Cheapflights users on 8/8. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/85:55 amEWR - STL
1 stop10h 09mFrontier
Thu 9/114:00 pmSTL - EWR
1 stop7h 34mFrontier
Deal found 8/8$186
This Priceline deal was found by Cheapflights users on 8/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/181:36 pmIAD - STL
1 stop11h 11mFrontier
Sat 8/233:02 pmSTL - IAD
1 stop6h 58mFrontier
Deal found 8/9$189
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Tue 9/168:20 amIAD - STL
1 stop6h 59mUnited Airlines
Fri 9/197:04 pmSTL - IAD
1 stop4h 28mUnited Airlines
Deal found 8/9$193
This Delta deal was found by Cheapflights users on 8/11. 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.
Mon 9/155:25 pmIAD - STL
1 stop6h 59mDelta
Wed 9/171:26 pmSTL - IAD
1 stop4h 13mDelta
Deal found 8/11$197
This Priceline deal was found by Cheapflights users on 8/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/85:55 amEWR - STL
1 stop10h 09mFrontier
Mon 9/154:00 pmSTL - EWR
1 stop7h 34mFrontier
Deal found 8/10$199
This CheapOair deal was found by Cheapflights users on 8/9. 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.
Thu 9/46:10 amIAD - STL
1 stop9h 54mFrontier
Sun 9/74:00 pmSTL - IAD
1 stop7h 15mFrontier
Deal found 8/9$201
This United Airlines deal was found by Cheapflights users on 8/10. 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.
Wed 9/109:48 pmEWR - STL
Nonstop2h 56mUnited Airlines
Sat 9/136:22 pmSTL - EWR
Nonstop2h 38mUnited Airlines
Deal found 8/10$203
This Southwest deal was found by Cheapflights users on 8/10. 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.
Tue 9/910:55 amLGA - STL
2 stops7h 55mSouthwest
Tue 9/167:20 amSTL - LGA
Nonstop2h 25mSouthwest
Deal found 8/10$204
This FlightHub deal was found by Cheapflights users on 8/10. 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.
Sat 8/236:30 amLGA - STL
1 stop8h 03mMultiple Airlines
Mon 8/252:30 pmSTL - LGA
1 stop20h 59mMultiple Airlines
Deal found 8/10$205
This Justfly.com deal was found by Cheapflights users on 8/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/235:55 amEWR - STL
1 stop8h 38mMultiple Airlines
Mon 8/252:30 pmSTL - EWR
1 stop5h 30mMultiple Airlines
Deal found 8/9$205

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pennsylvania to Missouri 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 August 11, 2025.
Use the filters below to find and compare flights from Pennsylvania to Missouri that are best for you.

Fly from

Pennsylvania

Fly to

Missouri

Route

Depart

Return

Price

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 9/6

6:35 am-12:25 pm

1 stop6h 50m

Lambert-St Louis

Sat 9/13

8:15 am-11:25 am

Nonstop2h 10m

$183

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Mon 8/25

6:10 am-12:56 pm

1 stop7h 46m

Lambert-St Louis

Mon 8/25

2:01 pm-12:16 am

1 stop9h 15m

$185

NewarkSt. Louis

EWR - STL

EWRSTL

Newark

Mon 9/8

5:55 am-3:04 pm

1 stop10h 09m

Lambert-St Louis

Thu 9/11

4:00 pm-12:34 am

1 stop7h 34m

$186

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Mon 8/18

1:36 pm-11:47 pm

1 stop11h 11m

Lambert-St Louis

Sat 8/23

3:02 pm-11:00 pm

1 stop6h 58m

$189

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 9/16

8:20 am-2:19 pm

1 stop6h 59m

Lambert-St Louis

Fri 9/19

7:04 pm-12:32 am

1 stop4h 28m

$193

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Mon 9/15

5:25 pm-11:24 pm

1 stop6h 59m

Lambert-St Louis

Wed 9/17

1:26 pm-6:39 pm

1 stop4h 13m

$197

NewarkSt. Louis

EWR - STL

EWRSTL

Newark

Mon 9/8

5:55 am-3:04 pm

1 stop10h 09m

Lambert-St Louis

Mon 9/15

4:00 pm-12:34 am

1 stop7h 34m

$199

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 9/4

6:10 am-3:04 pm

1 stop9h 54m

Lambert-St Louis

Sun 9/7

4:00 pm-12:15 am

1 stop7h 15m

$201

NewarkSt. Louis

EWR - STL

EWRSTL

Newark

Wed 9/10

9:48 pm-11:44 pm

Nonstop2h 56m

Lambert-St Louis

Sat 9/13

6:22 pm-10:00 pm

Nonstop2h 38m

$203

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Tue 9/9

10:55 am-5:50 pm

2 stops7h 55m

Lambert-St Louis

Tue 9/16

7:20 am-10:45 am

Nonstop2h 25m

$204

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/10

Showing 1-10 of 60 results
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Best time to book a flight from Pennsylvania to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri 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 Missouri

What is the cheapest month to book a flight from Pennsylvania to Missouri?

Currently, August is the cheapest month in which you can book a flight from Pennsylvania to Missouri (average of $311). Flying from Pennsylvania to Missouri 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 MO?

Find hourly flight availability from Pennsylvania to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 11, 2025.

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

Weekly flight availability from Pennsylvania to Missouri

Explore weekly flight availability from Pennsylvania to Missouri. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 11, 2025.

The most flights from USPA to USMO are scheduled on a Monday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 on average).

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. 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 Missouri. Reviews last updated August 11, 2025.
Read through reviews of airlines operating flights from Pennsylvania to Missouri, such as Southwest, Delta, and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,978 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,922 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Allegiant Air
7.2
Good
702 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

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

  • How popular is this Pennsylvania to Missouri flight route?

    Flights from Pennsylvania to Missouri have been viewed 33 times in the past calendar month.

  • What are the cheapest airlines to fly from Pennsylvania to Missouri one-way?

    One-way options have recently been found by users for as low as $79 on Spirit Airlines. Other airlines that offer cheap prices include Frontier from $92 and United Airlines from $95 one-way.

  • Can I find deals for flights from Pennsylvania to Missouri that include hotel bookings?

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

  • How can I find direct flights from Pennsylvania to Missouri?

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

  • Can I find deals for business class flights from Pennsylvania to Missouri?

    Yes. Cheapflights offers flight deals from Pennsylvania to Missouri 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 Missouri?

    Currently, August is the cheapest month in which you can book a flight from Pennsylvania to Missouri (average of $311). Flying from Pennsylvania to Missouri 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

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Alternative routes for Pennsylvania to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Pennsylvania to Missouri

Discover the top 6 airlines that operate flights from Pennsylvania to Missouri. 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 August 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$75Average$240FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$95Average$275FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$177Average$413FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$198Average$447FlexibilityNo cancel feeOn-time69%
DeltaCheapest$219Average$372FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$244Average$399FlexibilityNo cancel feeOn-time63%

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