PHL - SDF

$115 Find Cheap Flights from Philadelphia to Louisville - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Louisville departing on 9/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Louisville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Louisville, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Louisville, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$275
Typical prices: $573-$485
Multiple Airlines
Thu 8/20Mon 8/24
PHL - SDF • 2 stops
Cheapest non-stop
$485
Typical prices: $573-$526
American Airlines
Tue 7/14Sat 7/18
PHL - SDF • Non-stop
Nonstop flights
You can fly direct with American Airlines. Average duration is 2h 16m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg $324 (round-trip)
Shortest trip • 3h 50m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 7% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Louisville!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Louisville (PHL-SDF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Louisville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Louisville

Thu, Aug 20 - Mon, Aug 24
Multiple Airlines Logo
4:35 pm - 9:49 am
PHL
-
SDF
17h 14m
2 stops
Multiple Airlines Logo
10:39 am - 3:37 pm
SDF
-
PHL
28h 58m
1 stop
$275Multiple Airlines
Tue, Aug 11 - Wed, Aug 12
Southwest Logo
3:00 pm - 8:35 pm
PHL
-
SDF
5h 35m
1 stop
Southwest Logo
8:45 am - 2:20 pm
SDF
-
PHL
5h 35m
1 stop
$282Southwest
Tue, Jul 21 - Sat, Jul 25
Multiple Airlines Logo
2:59 pm - 11:26 am
PHL
-
SDF
20h 27m
1 stop
Multiple Airlines Logo
1:02 pm - 8:06 pm
SDF
-
PHL
7h 04m
1 stop
$288Multiple Airlines
Tue, Jul 21 - Sat, Jul 25
Multiple Airlines Logo
2:59 pm - 11:26 am
PHL
-
SDF
20h 27m
1 stop
Multiple Airlines Logo
8:06 pm - 12:22 pm
SDF
-
PHL
16h 16m
2 stops
$291Multiple Airlines
Wed, Aug 5 - Mon, Aug 10
Multiple Airlines Logo
6:33 pm - 10:32 am
PHL
-
SDF
15h 59m
1 stop
Multiple Airlines Logo
9:10 pm - 12:48 am
SDF
-
PHL
27h 38m
1 stop
$293Multiple Airlines
Thu, Jul 23 - Mon, Jul 27
Multiple Airlines Logo
2:59 pm - 7:58 pm
PHL
-
SDF
28h 59m
1 stop
Multiple Airlines Logo
8:48 pm - 12:22 pm
SDF
-
PHL
15h 34m
2 stops
$308Multiple Airlines
Sat, Oct 17 - Tue, Oct 20
Southwest Logo
6:10 am - 11:55 am
PHL
-
SDF
5h 45m
1 stop
Southwest Logo
9:05 am - 2:10 pm
SDF
-
PHL
5h 05m
1 stop
$311Southwest
Tue, Jul 14 - Fri, Jul 17
Multiple Airlines Logo
2:59 pm - 11:26 am
PHL
-
SDF
20h 27m
1 stop
Multiple Airlines Logo
8:48 pm - 12:39 am
SDF
-
PHL
27h 51m
1 stop
$314Multiple Airlines
Sat, Sep 19 - Tue, Sep 22
Southwest Logo
11:55 am - 9:20 pm
PHL
-
SDF
9h 25m
2 stops
Southwest Logo
8:45 am - 4:00 pm
SDF
-
PHL
7h 15m
1 stop
$317Southwest
Sat, Sep 19 - Tue, Sep 22
Southwest Logo
11:55 am - 9:20 pm
PHL
-
SDF
9h 25m
2 stops
Southwest Logo
1:15 pm - 9:50 pm
SDF
-
PHL
8h 35m
2 stops
$322Southwest
Booking Insights

KAYAK's insights & trends for Philadelphia to Louisville flights

Get data-powered insights and trends into flights from Philadelphia to Louisville to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Philadelphia to Louisville?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to Louisville departing in August.

What’s the cheapest day of the week to fly from Philadelphia to Louisville?

The average price of all round-trip flights from Philadelphia to Louisville clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Louisville on a Saturday and more expensive on a Tuesday. On your return trip to Philadelphia, you should consider flying back on a Saturday, and avoid Tuesdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Louisville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Louisville is August, where tickets cost $509 (return) on average. On the other hand, the most expensive months are July and October, where the average cost of round-trip tickets is $573 and $573 respectively.

Can I save money by flying with a layover from Philadelphia to Louisville?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $529 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to Louisville, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to Louisville, you should book around 5 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$115
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Philadelphia to Louisville

When to book flights from Philadelphia to Louisville

Are your dates flexible? Find out the best times to travel from Philadelphia to Louisville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Louisville

  • What is the cheapest flight from Philadelphia to Louisville?

    In the last 5 days, the lowest price for a flight from Philadelphia to Louisville was $115 for a one-way ticket and $275 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Louisville?

    No, a passport isn't needed to fly from Philadelphia to Louisville. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Philadelphia to Louisville?

    Philadelphia and Louisville are both served by 1 main airport. You will leave Philadelphia from Philadelphia and will be arriving at Louisville Intl.

  • Which airlines offer Wi-Fi service onboard planes from Philadelphia to Louisville?

    Only American Airlines offers inflight Wi-Fi service on the Philadelphia to Louisville flight route.

  • Which aircraft models fly most regularly from Philadelphia to Louisville?

    The Embraer 175 is the aircraft model that flies most regularly on the Philadelphia to Louisville flight route.

  • Which airline alliances offer flights from Philadelphia to Louisville?

    oneworld is the only airline alliance operating flights between Philadelphia and Louisville.

  • On which days can I fly direct from Philadelphia to Louisville?

    There are nonstop flights from Philadelphia to Louisville on a daily basis.

  • Which is the best airline for flights from Philadelphia to Louisville, Southwest or American Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Louisville are Southwest and American Airlines. With an average price for the route of $403 and an overall rating of 7.9, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $559 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Philadelphia to Louisville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Louisville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Louisville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Louisville from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Louisville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Louisville with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and SDF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Louisville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Louisville from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Philadelphia to Louisville

  • Looking for a cheap flight? 25% of our users found flights on this route for $526 or less round-trip.

Prefer to fly direct from Philadelphia to Louisville?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Philadelphia to Louisville Intl.
Find which airlines fly direct from Philadelphia Airport to Louisville Intl Airport, which days they fly and book direct flights.

Direct departures

Philadelphia to Louisville Intl

Monday

American Airlines

American Airlines

Tuesday

American Airlines

American Airlines

Wednesday

American Airlines

American Airlines

Thursday

American Airlines

American Airlines

Friday

American Airlines

American Airlines

Saturday

American Airlines

American Airlines

Sunday

American Airlines

American Airlines

See more direct flights

Direct returns

Louisville Intl to Philadelphia

Monday

American Airlines

American Airlines

Tuesday

American Airlines

American Airlines

Wednesday

American Airlines

American Airlines

Thursday

American Airlines

American Airlines

Friday

American Airlines

American Airlines

Saturday

American Airlines

American Airlines

Sunday

American Airlines

American Airlines

See more direct flights

Reviews of the top airlines flying from Philadelphia to Louisville

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Louisville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Louisville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4235 reviews
8.1Boarding
7.0Food
7.5Entertainment
8.6Crew
8.0Comfort
Airline reviews

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

10.0 ExcellentAnonymous, Jun 2026
DEN - ORF
Read more Southwest reviews

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

Kayak could’ve posted the correct gate number. Almost missed my flight.

Slow boarding, limited food and drink portions. Bad delays and turbulence

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

Fine. Nothing to write home about. The plane left on time, and arrived on time.

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

The gate got changed several times and the flight was delayed over an hour. Awful experience

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Everything you need to know for your flight from Philadelphia to Louisville

Information on your arrival and departure airports