PHL - SDF

$70 Find Cheap Flights from Philadelphia to Louisville

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 1/13. 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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Everything you should know

Cheapest round-trip
$147
Overall average: $447
Multiple Airlines
Sun 1/11Wed 1/14
PHL - SDF • 1 stop
Cheapest non-stop
$469
Typical prices: $377-$563
American Airlines
Tue 3/10Sat 3/14
PHL - SDF • Non-stop
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 20% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Sun, Jan 11 - Wed, Jan 14
Multiple Airlines Logo
5:10 am - 10:07 am
PHL
-
SDF
28h 57m1 stop
Multiple Airlines Logo
1:55 pm - 8:36 am
SDF
-
PHL
18h 41m1 stop
$147Multiple Airlines
Thu, Jan 8 - Tue, Jan 13
Spirit Airlines Logo
6:00 am - 2:41 pm
PHL
-
SDF
8h 41m1 stop
Spirit Airlines Logo
3:36 pm - 11:50 pm
SDF
-
PHL
8h 14m1 stop
$164Spirit Airlines
Wed, Jan 7 - Thu, Jan 8
Multiple Airlines Logo
12:23 pm - 11:59 pm
PHL
-
SDF
11h 36m1 stop
Multiple Airlines Logo
7:00 am - 8:01 pm
SDF
-
PHL
13h 01m1 stop
$172Multiple Airlines
Wed, Jan 7 - Thu, Jan 8
Multiple Airlines Logo
8:00 am - 11:59 pm
PHL
-
SDF
15h 59m2 stops
Multiple Airlines Logo
7:00 am - 8:01 pm
SDF
-
PHL
13h 01m1 stop
$177Multiple Airlines
Fri, Jan 9 - Mon, Jan 12
Multiple Airlines Logo
6:00 am - 1:00 pm
PHL
-
SDF
7h 00m1 stop
Multiple Airlines Logo
6:54 pm - 11:14 am
SDF
-
PHL
16h 20m1 stop
$187Multiple Airlines
Wed, Jan 7 - Thu, Jan 8
Multiple Airlines Logo
4:25 pm - 11:59 pm
PHL
-
SDF
7h 34m1 stop
Multiple Airlines Logo
7:00 am - 11:48 pm
SDF
-
PHL
16h 48m2 stops
$189Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
8:43 pm - 6:04 pm
PHL
-
SDF
21h 21m2 stops
Multiple Airlines Logo
3:36 pm - 11:50 pm
SDF
-
PHL
8h 14m1 stop
$197Multiple Airlines
Sun, Jan 11 - Wed, Jan 14
Spirit Airlines Logo
8:43 pm - 1:00 pm
PHL
-
SDF
16h 17m1 stop
Spirit Airlines Logo
1:55 pm - 8:47 am
SDF
-
PHL
18h 52m2 stops
$199Spirit Airlines
Thu, Jan 8 - Tue, Jan 13
Spirit Airlines Logo
6:11 pm - 1:00 pm
PHL
-
SDF
18h 49m2 stops
Spirit Airlines Logo
3:36 pm - 11:50 pm
SDF
-
PHL
8h 14m1 stop
$210Spirit Airlines
Wed, Feb 25 - Sun, Mar 1
Spirit Airlines Logo
5:30 am - 12:21 pm
PHL
-
SDF
6h 51m1 stop
Spirit Airlines Logo
3:33 pm - 11:50 pm
SDF
-
PHL
8h 17m1 stop
$223Spirit Airlines
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.

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 Monday and more expensive on a Tuesday. On your return trip to Philadelphia, you should consider flying back on a Saturday, and avoid Sundays 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 February, where tickets cost $387 (return) on average. On the other hand, the most expensive months are October and November, where the average cost of round-trip tickets is $573 and $556 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 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$70
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly and prices are also 13% lower on average.
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 3 days, the lowest price for a flight from Philadelphia to Louisville was $70 for a one-way ticket and $147 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?

    American Airlines, and Delta offer inflight Wi-Fi service on the Philadelphia to Louisville flight route.

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

    The Embraer ERJ-145 is the aircraft model that flies most regularly on the Philadelphia to Louisville flight route.

  • Which airline alliances offer flights from Philadelphia to Louisville?

    SkyTeam, and oneworld are the airline alliances operating flights between Philadelphia and Louisville, with SkyTeam being the most commonly used for this route.

  • 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 Delta?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Louisville are Southwest and Delta. With an average price for the route of $396 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $360 and an overall rating of 7.9.

  • 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 $579 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 4 airlines serving 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 4250 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

2.0 MediocreRobert, Dec 2025
LAS - TPA
Read more Southwest reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

Our flight got rescheduled 48 hours later, the airline didn’t pay a penny for our expenses.

We had to sit and wait for almost an hour after landing and taxiing to the gate. The jet bridge was broken so we just waited and waited and waited and it was inconvenient, hot, and unnecessary.

Flight was in time, very smooth ride and surprisingly lots of legroom in the cabin so I certainly will fly with spirit again

The seats are the most uncomfortable seats I’ve ever sat in. Don’t believe I’ll ever fly spirit again!!

Flight was canceled and instead of rescheduling at the gate we had to go out to the ticket counter. Unruly kids kicking the back of my rows chair with staff to inattentive to say something.

Customer feedback I sent to Spirited today: “I will never fly Spirit Airlines again and will work hard to convince my friends and family to boycott/avoid Spirit Airlines at all costs. I booked three seats for me and my 8 and 10 year old children on NK 1222 from Orlando to Kansas City for 12/7/25 leaving Orlando at 10:37AM. This itinerary was abandoned by Spirit and we were rebooked onto Spirit flight NK 213 leaving at 9:06PM without any notice. Then the nightmare really began. Flight 213 was delayed a total of 12 times, finally leaving at 6:35AM the following day. The gate was changed 5 times and our electronic boarding passes were invalidated at midnight. The worst part was that the 12 separate delays were incremental making it impossible to plan for accommodations for my family. My kids missed a day of school and barely slept under the harsh lights with lots of noise on the filthy airport floor. The customer service agent at Spirit Airlines told us we would be emailed a voucher for a hotel which never happened. I asked about it multiple times and it never arrived in my email inbox. This whole unfortunate situation could’ve been avoided if spirit had taken a realistic approach and delayed the flight from 9 PM until 6 AM from the beginning. My son gleefully deleted the Spirit app from my phone once we landed and we will never fly with Spirit again.”

Honestly horrible. The plane on the way back was delayed 6 times with no explanation on why. When I asked for a refund or some money back because I had to miss a day of work because of the desk, they told me no. Because of how poorly it was handled I will most likely never take spirit again

I love a flight without turbulence and you guys deliver It’d be nice to have comfier seats and maybe some inflight entertainment and snacks but that’s for Delta

This was my first time on a budget airline and I couldn't even sit down all the way because my knees would embed in the seat in front of me. I'm only 6' tall with a 32" inseam. There's no upside other than y'all are cheap. I'm glad it was only a 2 hour flight. Lesson learned! I get why everybody talks down on budget airlines. The staff was outstanding, the flight went as well as possible, great pilot, great boarding, smooth sailing. Zero chance I'll be back though.

Everything was smoothly and convenient! Just stay in this way!

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

Information on your arrival and departure airports