PHL - SDF

$91 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 9/20. 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

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
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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 28 - Thu, Sep 4
Spirit Airlines Logo
7:00 am - 1:51 pmPHL-SDF
6h 51m1 stop
Spirit Airlines Logo
3:10 pm - 9:39 pmSDF-PHL
6h 29m1 stop
$191Spirit Airlines
Find Deal
Thu, Sep 25 - Sun, Sep 28
Spirit Airlines Logo
9:50 pm - 9:19 amPHL-SDF
11h 29m1 stop
Spirit Airlines Logo
3:10 pm - 9:39 pmSDF-PHL
6h 29m1 stop
$193Spirit Airlines
Find Deal
Thu, Aug 21 - Thu, Aug 28
Spirit Airlines Logo
7:00 am - 1:51 pmPHL-SDF
6h 51m1 stop
Spirit Airlines Logo
2:46 pm - 8:49 pmSDF-PHL
6h 03m1 stop
$195Spirit Airlines
Find Deal
Thu, Sep 11 - Sun, Sep 14
Spirit Airlines Logo
9:50 pm - 9:19 amPHL-SDF
11h 29m1 stop
Spirit Airlines Logo
8:30 am - 8:45 pmSDF-PHL
12h 15m1 stop
$197Spirit Airlines
Find Deal
Mon, Oct 6 - Thu, Oct 9
Spirit Airlines Logo
8:43 pm - 9:19 amPHL-SDF
12h 36m1 stop
Spirit Airlines Logo
9:31 pm - 9:46 amSDF-PHL
12h 15m1 stop
$198Spirit Airlines
Find Deal
Mon, Sep 15 - Thu, Sep 18
Spirit Airlines Logo
8:43 pm - 9:19 amPHL-SDF
12h 36m1 stop
Spirit Airlines Logo
10:14 am - 11:59 pmSDF-PHL
13h 45m1 stop
$199Spirit Airlines
Find Deal
Wed, Oct 29 - Mon, Nov 3
Spirit Airlines Logo
1:58 pm - 10:57 pmPHL-SDF
8h 59m1 stop
Spirit Airlines Logo
7:45 am - 12:52 pmSDF-PHL
5h 07m1 stop
$201Spirit Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18
 Logo
8:41 pm - 11:34 amPHL-SDF
14h 53m1 stop
 Logo
7:58 pm - 2:38 pmSDF-PHL
18h 40m2 stops
Tue, Oct 21 - Sat, Oct 25
Southwest Logo
5:25 am - 12:25 pmPHL-SDF
7h 00m1 stop
Southwest Logo
11:50 am - 8:20 pmSDF-PHL
8h 30m2 stops
$242Southwest
Find Deal
Tue, Oct 21 - Thu, Oct 23
Southwest Logo
6:05 pm - 10:45 pmPHL-SDF
4h 40m1 stop
Southwest Logo
8:15 pm - 12:10 amSDF-PHL
3h 55m1 stop
$254Southwest
Find Deal
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 Sunday. On your return trip to Philadelphia, you should consider flying back on a Friday, 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 $386 (return) on average. On the other hand, the most expensive months are July and March, where the average cost of round-trip tickets is $558 and $516 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 1 stop layover the cheapest option at $605 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 4 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$91
Best time to beat the crowds with an average 10% 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 3 days, the lowest price for a flight from Philadelphia to Louisville was $91 for a one-way ticket and $191 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 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 United Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Louisville are Southwest and United Airlines. With an average price for the route of $398 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $420 and an overall rating of 7.4.

  • 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 $433 or less one-way and $509 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

Alaska Airlines, American Airlines, Qatar Airways

Alaska Airlines, American Airlines, +1 more

Tuesday

Alaska Airlines, American Airlines, Qatar Airways

Alaska Airlines, American Airlines, +1 more

Wednesday

Alaska Airlines, American Airlines, Qatar Airways

Alaska Airlines, American Airlines, +1 more

Thursday

Alaska Airlines, American Airlines, Qatar Airways

Alaska Airlines, American Airlines, +1 more

Friday

Alaska Airlines, American Airlines, Qatar Airways

Alaska Airlines, American Airlines, +1 more

Saturday

Alaska Airlines, American Airlines, Qatar Airways

Alaska Airlines, American Airlines, +1 more

Sunday

Alaska Airlines, American Airlines, Qatar Airways

Alaska Airlines, American Airlines, +1 more

See more direct flights

Direct returns

Louisville Intl to Philadelphia

Monday

Aer Lingus, Alaska Airlines, American Airlines, +1 more

Aer Lingus, Alaska Airlines, +2 more

Tuesday

Aer Lingus, Alaska Airlines, American Airlines, +1 more

Aer Lingus, Alaska Airlines, +2 more

Wednesday

Aer Lingus, Alaska Airlines, American Airlines, +1 more

Aer Lingus, Alaska Airlines, +2 more

Thursday

Aer Lingus, Alaska Airlines, American Airlines, +1 more

Aer Lingus, Alaska Airlines, +2 more

Friday

Aer Lingus, Alaska Airlines, American Airlines, +1 more

Aer Lingus, Alaska Airlines, +2 more

Saturday

Aer Lingus, Alaska Airlines, American Airlines, +1 more

Aer Lingus, Alaska Airlines, +2 more

Sunday

Aer Lingus, Alaska Airlines, American Airlines, +1 more

Aer Lingus, Alaska Airlines, +2 more

See more direct flights

Reviews of the top 5 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.
8.0
SouthwestOverall score based on 4246 reviews
7.0Food
7.5Entertainment
8.0Comfort
8.6Crew
8.1Boarding
Airline reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

2.0 MediocreAnonymous, Jul 2025AUS - RDU
Read more Southwest reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

It was okay. The plane was delayed from earlier in the day, but they kept updating the departure time, sometimes later, sometimes earlier. That was stressful. Once we finally got on and took off, it was fine. I was supposed to have a connection in Chicago to Los Angeles, and the time for so late I was rebooked to arrive in LA 3 hours late. The departure time to Chicago later became early enough to have taken my original connection and arrive earlier but that wasn't an option.

It was one and half hour late... Not sure if any other experience matters.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

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!

We started with trouble checking in 24 hours early. Then my husband did not get his TSA precheck. Finally flight delayed due to no crew. I know things happen

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

It’s a great flight. Service is good. Staff is awesome.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

check in at security was a hassle being scanned. Spirit employees were helpful and professional.

First time on Spirit. Definitely a streamline flight but I would fly Spirit again.

The flight was 3.5 hrs delayed. I was not notified prior to arriving to the airport via spirit app. or via boarding pass that I already had loaded on my phone. The agent that i saw at the counter didn’t mention anything about the delay either. I only saw the update after logging in to my email account.

The flight and boarding process was smooth. Wifi was unavailable and I prepaid for it. Have requested a refund

Had a issue with catching flight due to airline, was unable to board flight

Spirit is a very uncomfortable travel experience. It’s cheap but you are squeezed into the seats like canned meat.

Not great. Seats uncomfortable. Crew a little rude. Amenities like wifi and drinks way too expensive.

Late departure by 1:45min. No explanation why. During boarding inconsistent policing of their baggage rules. Before takeoff and lamdimg strange obsession with window shade and armrest positions. Don't know why they care. 15 min tarmac delay on arrival, they blamed airport congestion but we were the o lh flight waiting, it was clear it was due to poor staff planning (only one ground crew to receive airplanes and multiple arrivals) Got there but was rrally lame the whole trip.

The seat belt was lengthy enough that I did not need an extender. Courteous and helpful flight attendants.

We sat on the tarmac for an hour waiting for a gate to deplane.

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

Information on your arrival and departure airports

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