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$81+ Cheap flights from Louisville to Philadelphia (SDF - PHL)

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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — PHL
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
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Find cheap flights from Louisville to Philadelphia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Louisville Intl to Philadelphia are usually found in June or July, booked 84 days in advance, depart on a Saturday or Friday and return on a Monday

Cheap flight deals from Louisville to Philadelphia

Cheapest flights from Louisville to Philadelphia
Explore the most affordable flight options available from Louisville to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Sun 5/316:00 am
PHL
-
SDF
1 stop27h 28m
Multiple Airlines
Deal found 4/21$171
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1410:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Sun 5/176:00 am
PHL
-
SDF
1 stop27h 28m
Multiple Airlines
Deal found 4/23$175
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Sun 5/106:00 am
PHL
-
SDF
1 stop27h 28m
Multiple Airlines
Deal found 4/20$182
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Sat 5/96:45 am
PHL
-
SDF
1 stop26h 43m
Multiple Airlines
Deal found 4/21$183
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/312:20 pm
SDF
-
PHL
1 stop11h 33m
Multiple Airlines
Wed 6/106:00 am
PHL
-
SDF
1 stop27h 28m
Multiple Airlines
Deal found 4/21$193
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1410:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Mon 5/186:00 am
PHL
-
SDF
1 stop12h 58m
Multiple Airlines
Deal found 4/22$203
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:33 am
SDF
-
PHL
1 stop14h 13m
Multiple Airlines
Mon 5/186:00 am
PHL
-
SDF
1 stop12h 58m
Multiple Airlines
Deal found 4/23$204
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Mon 6/18:00 am
PHL
-
SDF
1 stop12h 20m
Multiple Airlines
Deal found 4/21$206
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Sun 5/316:00 am
PHL
-
SDF
1 stop27h 28m
Multiple Airlines
Deal found 4/23$207
This CheapOair deal was found by Cheapflights users on 4/20. 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 5/1410:33 am
SDF
-
PHL
1 stop22h 52m
Spirit Airlines
Sun 5/176:45 am
PHL
-
SDF
1 stop26h 43m
Spirit Airlines
Deal found 4/20$208
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Mon 6/18:00 am
PHL
-
SDF
1 stop12h 20m
Multiple Airlines
Deal found 4/21$210

Find flight deals from Louisville to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Philadelphia (PHL). 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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$171
(Kiwi.com)

One-way from

$81
(Kiwi.com)

Popular in

January

Cheapest in

June

Average price

$519

Good round-trip deal

$509 or less

Good one-way deal

$260 or less
Provider with most accurate pricing for Louisville Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Philadelphia flights.
Search Deals
From Louisville Intl to Philadelphia
Search Deals
One-way flight from Louisville Intl to Philadelphia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Louisville Intl to Philadelphia.
Search Deals
Price to beat on a one-way flight from Louisville Intl to Philadelphia.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Philadelphia 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 April 24, 2026.
Use the filters below to find and compare flights from Louisville to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Tue 9/15

1:15 pm-6:00 pm

1 stop4h 45m

Philadelphia

Fri 9/18

10:20 am-2:25 pm

1 stop4h 05m

$340

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Mon 9/14

6:45 am-5:25 pm

1 stop10h 40m

Philadelphia

Thu 9/17

8:00 am-2:25 pm

1 stop6h 25m

$346

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Wed 6/3

6:20 am-3:55 pm

2 stops9h 35m

Philadelphia

Wed 6/10

12:55 pm-9:40 pm

2 stops8h 45m

$370

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Sat 8/29

7:50 am-3:00 pm

1 stop7h 10m

Philadelphia

Sun 8/30

1:35 pm-8:10 pm

1 stop6h 35m

$389

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Thu 8/13

6:45 am-3:25 pm

2 stops8h 40m

Philadelphia

Mon 8/17

2:10 pm-10:35 pm

2 stops8h 25m

$399

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Sat 5/16

6:40 am-5:50 pm

2 stops11h 10m

Philadelphia

Sat 5/23

12:25 pm-8:50 pm

2 stops8h 25m

$410

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Fri 8/28

6:45 am-3:25 pm

2 stops8h 40m

Philadelphia

Sun 8/30

6:20 am-3:30 pm

2 stops9h 10m

$428

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Thu 5/28

2:40 pm-9:45 pm

1 stop7h 05m

Philadelphia

Thu 6/4

6:05 am-2:55 pm

2 stops8h 50m

$442

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Thu 6/11

3:35 pm-12:20 am

2 stops8h 45m

Philadelphia

Mon 6/15

5:20 pm-9:55 pm

1 stop4h 35m

$442

LouisvillePhiladelphia

SDF - PHL

SDFPHL

Louisville Intl

Mon 7/6

3:35 pm-12:20 am

2 stops8h 45m

Philadelphia

Thu 7/9

12:50 pm-10:25 pm

2 stops9h 35m

$447

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/20

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Louisville to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to Philadelphia in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Louisville-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Louisville to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Louisville 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 Louisville to Philadelphia

How far ahead should I book a flight from Louisville to Philadelphia?

The best time to book flights from Louisville to Philadelphia is 83 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Louisville to Philadelphia?

Currently, June is the cheapest month in which you can book a flight from Louisville to Philadelphia (average of $378). Flying from Louisville to Philadelphia in January is currently the most expensive (average of $594). 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 SDF to PHL?

Find hourly flight availability from Louisville to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2026.

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

How much does it cost to fly round-trip from Louisville to Philadelphia?

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated April 24, 2026.
Read through reviews of airlines operating flights from Louisville to Philadelphia, such as Southwest,American Airlines, andSpirit Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,335 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,668 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Spirit Airlines
6.3
Okay
8,636 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

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

  • What airports do I use to fly from Louisville to Philadelphia?

    Philadelphia is the airport most travelers will use when flying to Philadelphia from Louisville Intl. Booking flights from Louisville Intl (SDF) to Philadelphia (PHL) should be relatively easy as there are 5 daily flights to Philadelphia from 3 different airlines. 2h 05m is how long a flight from Louisville to Philadelphia will take if you book a nonstop flight.

  • How popular is this Louisville to Philadelphia flight route?

    The Louisville Intl to Philadelphia flight path was viewed by 13 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Louisville to Philadelphia?

    Airlines like Southwest fly from Louisville to Philadelphia in about 4h 45m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 575 mi.

  • What are the cheapest airlines flying from Louisville to Philadelphia round-trip?

    Cheapflights users have booked flights from Louisville to Philadelphia round-trip from $119. Other airlines that can offer you cheap pricing are Southwest, from $215, and American Airlines, from $277. Spirit Airlines is 77% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Louisville to Philadelphia one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $49. However, be on the lookout for offers from Delta and Southwest, as they are both options that can get you from Louisville to Philadelphia for a low price.

  • What are the most reliable airlines from Louisville to Philadelphia?

    Consider Republic Airways (94%), Aer Lingus (88%) or American Airlines (87%) when booking your flight. These represent the most reliable airlines when flying from Louisville to Philadelphia.

  • What are the cheapest flights from Louisville to Philadelphia?

    Looking for the cheapest flight from Louisville to Philadelphia? While on average our users pay $542, our data indicates the cheapest price to be $187. The most popular route (Louisville Intl - Philadelphia), is priced around $175.

  • Can I find deals for flights from Louisville to Philadelphia that include hotel bookings?

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

  • How can I find direct flights from Louisville to Philadelphia?

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

  • Can I find deals for business class flights from Louisville to Philadelphia?

    Yes. Cheapflights offers flight deals from Louisville to Philadelphia 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 Louisville to Philadelphia?

    Currently, June is the cheapest month in which you can book a flight from Louisville to Philadelphia (average of $378). Flying from Louisville to Philadelphia in January is currently the most expensive (average of $594). 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

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
King of Prussia
Reading
Camden
Ocean City
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester
Newark

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Louisville to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Louisville to Philadelphia

Discover the top 3 airlines that operate flights from Louisville to Philadelphia. 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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$119Average$231FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$215Average$400FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$277Average$532FlexibilityNo cancel feeOn-time71%

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