SDF - SJU

$153 Find Cheap Flights from Louisville to San Juan

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to San Juan departing on 10/18. 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 San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to San Juan, 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 Louisville to San Juan, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Louisville to San Juan (SDF-SJU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to San Juan 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 Louisville to San Juan

Sat, Nov 15 - Tue, Nov 18
American Airlines Logo
6:50 am - 11:52 pmSDF-SJU
16h 02m1 stop
American Airlines Logo
6:25 am - 6:08 pmSJU-SDF
12h 43m2 stops
$225American Airlines
Find Deal
Tue, Feb 24 - Wed, Mar 4
American Airlines Logo
11:08 am - 9:00 pmSDF-SJU
8h 52m2 stops
American Airlines Logo
10:26 am - 12:29 amSJU-SDF
15h 03m1 stop
$265American Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
8:02 am - 11:30 pmSDF-SJU
14h 28m1 stop
American Airlines Logo
10:26 am - 12:29 amSJU-SDF
15h 03m1 stop
$280American Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29
Multiple Airlines Logo
6:58 pm - 10:56 amSDF-SJU
15h 58m1 stop
Multiple Airlines Logo
5:51 pm - 2:15 pmSJU-SDF
20h 24m2 stops
$300Multiple Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29
Southwest Logo
3:10 pm - 11:45 pmSDF-SJU
8h 35m1 stop
Southwest Logo
6:10 am - 6:05 pmSJU-SDF
11h 55m1 stop
$305Southwest
Find Deal
Sat, Oct 25 - Tue, Oct 28
United Airlines Logo
9:40 am - 8:38 pmSDF-SJU
10h 58m1 stop
United Airlines Logo
1:05 am - 1:17 pmSJU-SDF
12h 12m2 stops
$314United Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 15
United Airlines Logo
7:00 am - 9:26 pmSDF-SJU
13h 26m2 stops
United Airlines Logo
8:30 am - 5:16 pmSJU-SDF
9h 46m2 stops
$315United Airlines
Find Deal
Thu, Nov 6 - Mon, Nov 10
Southwest Logo
12:55 pm - 1:25 amSDF-SJU
11h 30m1 stop
Southwest Logo
5:40 am - 11:20 amSJU-SDF
6h 40m1 stop
$430Southwest
Find Deal
Sun, Jan 18 - Sat, Jan 24
Multiple Airlines Logo
10:55 am - 11:31 pmSDF-SJU
11h 36m1 stop
Multiple Airlines Logo
3:55 am - 11:45 pmSJU-SDF
20h 50m1 stop
$453Multiple Airlines
Find Deal
Tue, Nov 11 - Wed, Jan 7
Delta Logo
3:09 pm - 11:13 pmSDF-SJU
7h 04m1 stop
Delta Logo
3:21 pm - 9:45 pmSJU-SDF
7h 24m1 stop
$472Delta
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $225 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 21% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 27% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$225
Typical prices: $267-$720
American Airlines
Sat 11/15Tue 11/18
SDF - SJU • 1 stop
Cheapest one-way
$148
Typical prices: $145-$261
Spirit Airlines
Sat 10/18
SDF - SJU • 1 stop
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 San Juan!
Booking Insights

KAYAK's insights & trends for Louisville to San Juan flights

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

How much is a round-trip flight from Louisville to San Juan Luis Munoz Marin Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Louisville to San Juan Luis Munoz Marin Intl Airport departing in November.

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

The average price of all round-trip flights from Louisville to San Juan Luis Munoz Marin Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Louisville to San Juan, you should consider leaving on a Tuesday and avoid Fridays if you are looking for the best rates. For your return to Louisville, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

What is the cheapest month to fly from Louisville to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Louisville to San Juan Luis Munoz Marin Intl Airport, 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 Louisville to San Juan Luis Munoz Marin Intl Airport is September, where tickets cost $313 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $566 and $528 respectively.

How far in advance should I book a flight from Louisville to San Juan Luis Munoz Marin Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Louisville to San Juan Luis Munoz Marin Intl Airport, 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 Louisville to San Juan Luis Munoz Marin Intl Airport, you should book around 2 weeks before departure, which saves you about 21% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$148
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from Louisville to San Juan

When to book flights from Louisville to San Juan

Are your dates flexible? Find out the best times to travel from Louisville to San Juan 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 Louisville to San Juan flights

  • What is the cheapest flight from Louisville to San Juan Luis Munoz Marin Intl Airport?

    In the last 3 days, the lowest price for a flight from Louisville to San Juan Luis Munoz Marin Intl Airport was $148 for a one-way ticket and $225 for a round-trip.

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

    Yes, you’ll need a passport to travel to San Juan from Louisville.

  • Which aircraft models fly most regularly from Louisville to San Juan?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Louisville to San Juan?

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

  • What is the most popular layover when flying to San Juan from Louisville?

    Atlanta is the most popular layover city among KAYAK users traveling from Louisville to San Juan.

  • Which is the best airline for flights from Louisville to San Juan, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Louisville to San Juan are Southwest and Delta. With an average price for the route of $480 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $386 and an overall rating of 7.9.

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

    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 Louisville to San Juan.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Louisville 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 Louisville to San Juan?

    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 San Juan with an airline and back to Louisville with another airline. Booking your flights between Louisville and SJU 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 Louisville to San Juan?

    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 San Juan from Louisville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Louisville to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Louisville to San Juan. 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 Louisville to San Juan? 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 4235 reviews
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
8.6Crew
Airline reviews

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

4.0 OkayAnnette, Oct 2025LGA - MCI
Read more Southwest reviews

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

mandatory demand customer to check their carry on because not enough people check bags.

Connecting flight is on time and boarding was a breeze!

Excellent. Would encourage Southwest to keep current boarding procedures with free style seating. Makes for a fantastic experience

As always, the entire Southwest experience was perfect. Purchasing the tickets on the Southwest web site was effortless, departure and arrival gates were spotless and comfortable, plane was clean and comfortable, crew was excellent and flight was on time. Wheelchair service in Las Vegas at departure was somewhat chaotic and disjointed, but I am not sure if that was Southwest problem, airport problem or combination.

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

On time flight. Seat comfort could be better in the Comfort section.

My issue was with TSA agents for delta airlines. My luggage got flagged. The agent was going thru another persons first. He took 20 min to go thru hers. I asked them to bring mine closer so I could sit down . They said you can go sit it will be fine. I said I am supposed to keep my eyes on my bags at all times. The agent was meticulously unwrapping 2 gifts that the lady had and then tried to re warp it. He was trying to be kind i get it but 20 min for me to stand watching him do that was ridiculous. It was 6 am and there were a ton of travelers. Mine was flagged for some air packed tea that I bought in Turkey. My previous delta flight and 2 others before didn’t flag it. Consistency would be nice. Also on the flight the window shades were down for take off and landing - I thought that was very odd I thought they had to remain open for take off and landing.

The flight was an hour and a half late departing which was inconvenient

Delay in SLC jammed us up in Chicago. Got caught up in rush hour traffic

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

The flight was great. The gate location was way to far away!!!

The flight attendant in first class was beyond rude and didn't care at all about her job. AND the gate agent was even worse than the flight attendant for rudeness. She was awful.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

Cramped seating for me. Luckily it wasn’t a long flight

Lounge in Lagos is terrible, food on board from Lagos to Atlanta was horrible. Only bright spot the cabin crew were awesome.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

The worst landing I have ever had on a domestic flight. Thought we would lose the landing gear on landing in Newark. Then we spent 40 minutes trying to position the plane in the right place to be able to get the jet way to the plane. The plane arrived stopped. The announcer was that we were there. Everybody got up, then we were told to sit back down because they had to have us towed to a different position. We got towed and then everyone stood up and they told us we were in the wrong position to sit back down again, and then we got towed to a different position This did not happen immediately. It was 30 minutes while we wandered around a small section of the tarmac in Newark close to the gate, but apparently not close enough. Horrifying experience The CAB should be investigating that flight

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Boarding was organized. Old plane. Seat fairly comfortable. Business Class much too large so you don’t receive as much attention as you should considering what you pay for the seat.

Boarding was organized. Plane seats comfortable and service was attentive. Food options were good.

This was a very average flight. The seat was out of alignment so more uncomfortable than usual. The cabin felt not well maintained. But I safely got where I needed to go.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

I will never book a flight through Cheap fare. They booked me from Portland Main . And would not give me a refund, so I bought 2 tickets one for 299. From Portland Main to ORD. Then I had to buy a ticket from Oregon PDX to ORD that was another 440. So Just so you know they even told me it was there fault but no refund. Bad bussniess. I did inform United but they said they couldn't help me due to the fact I booked through Cheap Tickets. Never again. And I'm spreding the word. I let everyone know at my 50th class reunion

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

Flight attendants on this flight were very attentive and friendly

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

the trip to madrid was uncomfortable with my legs touching the seat in front of me

The plane was late, when we did board the plane was as cold as a freezer. I was freezing the entire flight, no blankets. Lost miserable flight I’ve ever had.

My flight was delayed for 17hs because the pilot forgot his passport!!! What a joke. AA used to be a great airline, now I have to think twice before flying with them again.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

The flight was severely delayed due to the missing flight attendants.

Absolutely horrible. Usually pay $40-$50 to check luggage in. I tried to check my suitcase in and the price is raised to $70. That's ridiculously greedy c'mon. I had to leave my suitcase with all my clothes and hygiene products and repurchase once i landed in Atlanta. You guys make it really stressful to travel. Don't even want to travel anymore.

They cancelled the flight 3 hours prior departure. Had to spend $400 for a ne way flight with Delta Airlines! Spirit Airlines are not serios!

My luggage didn’t arrive at LAX, so that wasn’t a good experience.

Terrible seat, no in flight entertainment. No complimentary food or drinks. Seats really hurt my back after flying spirit for the day.

Plastic seat really hurt my back. Cannot even recline on the flight. Very hard to sleep on the plane due to terrible seats . Food and drinks were expensive and not very good. There were like 2 open exit rows behind me. My isle was full so I asked flight attendants if I could sit there. They told me it was a safety issue??? I think it more unsafe to have no one sitting there. In case of emergency, you’d want someone there to help.

The delays and the lack of communication and organization within the airport itself for Staffing this flight and coordinating the paper log necessary to depart was ridiculous and deplorable

It was a no show, so we got put in hotels for a nite. The A320 plane was very modern and flite and crew (if a pilot shows up were fine). Price was very good.

The entire staff from check in agents to flight attendants were pleasant and professional. Would suggest a complimentary water.

I was never aware that I had to pay $100 per luggage to them on the plane that are simply carry-ons. This is discriminatory and I’m going to be alerting my entire family and friends and my Instagram following up over 75,000 of this issue and misunderstanding, including mismanaging.

Everything you need to know for your flight from Louisville to San Juan

Information on your arrival and departure airports

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