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$76+ Cheap flights from Philadelphia to Louisville (PHL - SDF)

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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SDF
May 21 — May 281
Thu 5/21
Thu 5/28
1 adult, Economy
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Find cheap flights from Philadelphia to Louisville 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Philadelphia to Louisville Intl are usually found in May or June, booked 88 days in advance, depart on a Monday or Wednesday and return on a Saturday

Cheap flight deals from Philadelphia to Louisville

Cheapest flights from Philadelphia to Louisville
Explore the most affordable flight options available from Philadelphia to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/33:20 pm
PHL
-
SDF
1 stop18h 08m
Multiple Airlines
Fri 5/810:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Deal found 4/16$155
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/33:20 pm
PHL
-
SDF
1 stop18h 08m
Multiple Airlines
Mon 5/47:48 pm
SDF
-
PHL
1 stop19h 54m
Multiple Airlines
Deal found 4/16$162
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:00 am
PHL
-
SDF
1 stop12h 20m
Multiple Airlines
Mon 6/19:10 pm
SDF
-
PHL
1 stop26h 43m
Multiple Airlines
Deal found 4/16$170
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 5/288:44 pm
PHL
-
SDF
1 stop12h 44m
Multiple Airlines
Mon 6/19:10 pm
SDF
-
PHL
1 stop26h 22m
Multiple Airlines
Deal found 4/20$180
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/33:20 pm
PHL
-
SDF
1 stop18h 08m
Multiple Airlines
Sat 5/910:33 am
SDF
-
PHL
1 stop13h 20m
Multiple Airlines
Deal found 4/16$182
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:45 am
PHL
-
SDF
1 stop26h 43m
Multiple Airlines
Fri 5/810:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Deal found 4/18$183
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:44 pm
PHL
-
SDF
1 stop22h 14m
Multiple Airlines
Thu 5/2110:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Deal found 4/16$190
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 am
PHL
-
SDF
1 stop11h 58m
Multiple Airlines
Fri 5/810:33 am
SDF
-
PHL
1 stop14h 11m
Multiple Airlines
Deal found 4/16$192
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:00 am
PHL
-
SDF
1 stop14h 20m
Multiple Airlines
Mon 6/89:10 pm
SDF
-
PHL
1 stop27h 34m
Multiple Airlines
Deal found 4/17$193
This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:44 pm
PHL
-
SDF
1 stop12h 44m
Spirit Airlines
Fri 5/2210:33 am
SDF
-
PHL
1 stop13h 25m
Spirit Airlines
Deal found 4/17$196
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:04 pm
PHL
-
SDF
1 stop15h 59m
Multiple Airlines
Sat 5/2310:33 am
SDF
-
PHL
1 stop13h 20m
Multiple Airlines
Deal found 4/16$203

Find flight deals from Philadelphia to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Louisville (SDF). 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 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$155
(Kiwi.com)

One-way from

$76
(Cheapflightsfares)

Popular in

October

Cheapest in

May

Average price

$554

Good round-trip deal

$553 or less

Good one-way deal

$347 or less
Provider with most accurate pricing for Philadelphia-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Louisville Intl flights.
Search Deals
From Philadelphia to Louisville Intl
Search Deals
One-way flight from Philadelphia to Louisville Intl
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($5 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 Philadelphia to Louisville Intl.
Search Deals
Price to beat on a one-way flight from Philadelphia to Louisville Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Louisville 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 21, 2026.
Use the filters below to find and compare flights from Philadelphia to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Sat 8/29

11:55 am-9:20 pm

2 stops9h 25m

Louisville Intl

Sun 9/6

8:40 am-5:40 pm

2 stops9h 00m

$399

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Fri 5/22

2:31 pm-8:36 am

1 stop18h 05m

Louisville Intl

Mon 5/25

9:10 pm-2:49 pm

2 stops17h 39m

$415

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Fri 5/29

4:30 pm-9:45 pm

1 stop5h 15m

Louisville Intl

Mon 6/1

2:40 pm-9:45 pm

1 stop7h 05m

$437

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Mon 6/1

6:40 am-4:50 pm

2 stops10h 10m

Louisville Intl

Mon 6/8

3:35 pm-12:20 am

2 stops8h 45m

$447

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Wed 9/16

2:45 pm-8:35 pm

2 stops5h 50m

Louisville Intl

Mon 9/21

6:45 am-3:25 pm

2 stops8h 40m

$482

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Fri 5/8

12:45 pm-9:00 pm

2 stops8h 15m

Louisville Intl

Sun 5/10

7:00 am-3:45 pm

2 stops8h 45m

$529
Quickest round-trip

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Thu 9/3

9:49 am-12:07 pm

Nonstop2h 18m

Louisville Intl

Sun 9/6

7:31 am-9:34 am

Nonstop2h 03m

$533

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Sat 5/16

12:25 pm-8:50 pm

2 stops8h 25m

Louisville Intl

Sun 5/17

10:25 am-6:50 pm

2 stops8h 25m

$533

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Fri 5/22

6:10 am-10:23 am

1 stop4h 13m

Louisville Intl

Mon 5/25

7:52 pm-10:15 am

1 stop14h 23m

$547

PhiladelphiaLouisville

PHL - SDF

PHLSDF

Philadelphia

Wed 5/13

5:15 pm-12:25 am

1 stop7h 10m

Louisville Intl

Sun 5/17

7:59 pm-12:57 am

1 stop4h 58m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/20

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Philadelphia to Louisville

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 Philadelphia to Louisville in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 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 Philadelphia-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Louisville 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 Philadelphia-Louisville 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 Philadelphia to Louisville

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

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

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Louisville. Price data was last updated on April 17, 2026.

To ensure you get the cheapest price possible for a flight from Philadelphia to Louisville, you should look to book at least 88 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, May is the cheapest month in which you can book a flight from Philadelphia to Louisville (average of $442). Flying from Philadelphia to Louisville in October is currently the most expensive (average of $573). 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 PHL to SDF?

Find hourly flight availability from Philadelphia to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 21, 2026.

It’s typically best to fly out from Philadelphia to Louisville in the afternoon. Doing so could potentially save you 9% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Philadelphia to Louisville?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Louisville. Price data was last updated on April 18, 2026.

Travelers seeking maximum savings on their Philadelphia to Louisville flight should consider departing on Sunday at noon when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated April 21, 2026.
Read through reviews of airlines operating flights from Philadelphia to Louisville, such as Southwest,Delta, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
4,331 reviews
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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.
Delta
7.9
Good
8,434 reviews
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
11,645 reviews
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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 Philadelphia to Louisville. 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 Philadelphia to Louisville?

    If you book a flight from Philadelphia to Louisville, you will be flying from Philadelphia to Louisville Intl. Flights to Louisville Intl (SDF) from Philadelphia (PHL) take 2h 18m for a nonstop flight. There are 4 flights from Philadelphia to Louisville per day from 3 airlines.

  • How popular is this Philadelphia to Louisville flight route?

    Within the past month, 2 users have taken a look at flights from Philadelphia to Louisville Intl.

  • How long is the flight from Philadelphia to Louisville?

    Airlines like Southwest fly from Philadelphia to Louisville in about 9h 25m. The time it takes to get you to your destination can typically vary by up to . Philadelphia and Louisville are separated by a distance of 575 mi.

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

    According to our current data, Southwest ($189), Delta ($226), and American Airlines ($349) offers the cheapest pricing from Philadelphia to Louisville. You may be able to fly from Philadelphia to Louisville for 64% less than the average price by searching for these airlines.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $163. Users have also found prices from $174 and $188 on Southwest and American Airlines, respectively.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Philadelphia to Louisville on time: PSA Airlines (89%), Alaska Airlines (87%), Aer Lingus (86%).

  • What are the cheapest flights from Philadelphia to Louisville?

    The cheapest flight price from Philadelphia to Louisville is $344. On average you can expect to pay $512. The most popular route, (Philadelphia - Louisville Intl), can usually be booked for $211.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Philadelphia to Louisville (average of $442). Flying from Philadelphia to Louisville in October is currently the most expensive (average of $573). 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 Louisville?

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Elizabethtown
Corydon
Jeffersonville
Bardstown

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Alternative routes for Philadelphia to Louisville

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

Discover the top 3 airlines that operate flights from Philadelphia to Louisville. 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 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$189Average$395FlexibilityNo cancel feeOn-time63%
DeltaCheapest$226Average$369FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$349Average$540FlexibilityNo cancel feeOn-time71%

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