San Juan

$129+ Cheap flights from Louisville (SDF) to San Juan

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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SJU
jul. 9 — jul. 161
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Cheap flight deals from Louisville to San Juan

Cheapest flights from Louisville to San Juan
Explore the most affordable flight options available from Louisville to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juni 9, 2026.

This American Airlines deal was found by Cheapflights users on 6/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fr. 9/187:27 pm
SDF
-
SJU
2 stops15h 33m
American Airlines
lø. 9/266:27 am
SJU
-
SDF
2 stops10h 47m
American Airlines
Deal found 6/8$268
This American Airlines deal was found by Cheapflights users on 6/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ti. 12/16:00 am
SDF
-
SJU
1 stop8h 02m
American Airlines
ti. 12/84:41 pm
SJU
-
SDF
1 stop8h 41m
American Airlines
Deal found 6/8$273
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
ma. 8/109:10 pm
SDF
-
SJU
1 stop19h 01m
Multiple Airlines
fr. 8/146:00 am
SJU
-
SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/6$280
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
ma. 8/109:10 pm
SDF
-
SJU
1 stop19h 01m
Multiple Airlines
to. 8/135:22 pm
SJU
-
SDF
1 stop21h 06m
Multiple Airlines
Deal found 6/6$286
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
ma. 8/38:48 pm
SDF
-
SJU
1 stop19h 17m
Multiple Airlines
fr. 8/76:00 am
SJU
-
SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/6$291
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
ma. 8/109:10 pm
SDF
-
SJU
1 stop19h 01m
Multiple Airlines
on. 8/125:22 pm
SJU
-
SDF
1 stop17h 10m
Multiple Airlines
Deal found 6/6$303
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
fr. 8/79:10 pm
SDF
-
SJU
1 stop19h 01m
Multiple Airlines
fr. 8/146:00 am
SJU
-
SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/6$305
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
ma. 8/109:10 pm
SDF
-
SJU
1 stop19h 01m
Multiple Airlines
lø. 8/156:00 am
SJU
-
SDF
2 stops28h 32m
Multiple Airlines
Deal found 6/6$306
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
fr. 8/79:10 pm
SDF
-
SJU
1 stop19h 01m
Multiple Airlines
to. 8/135:22 pm
SJU
-
SDF
1 stop21h 06m
Multiple Airlines
Deal found 6/7$310

Find flight deals from Louisville to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to San Juan (PR1). 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 juni 9, 2026.

Round-trip from

$268
(American Airlines)

One-way from

$129
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$501
From Louisville Intl to San Juan
One-way flight from Louisville Intl to San Juan
Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Average for round-trip flights in June 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to San Juan 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 juni 9, 2026.
Use the filters below to find and compare flights from Louisville to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

to. 8/27

6:00 am-4:38 pm

1 stop10h 38m

San Juan Luis Munoz Marin Intl

ti. 9/1

5:49 pm-12:34 am

1 stop6h 45m

$316
Quickest round-trip

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

ti. 7/21

8:10 am-4:39 pm

1 stop8h 29m

San Juan Luis Munoz Marin Intl

on. 8/5

5:49 pm-12:24 am

1 stop6h 35m

$326

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

lø. 9/5

6:45 am-4:40 pm

2 stops9h 55m

San Juan Luis Munoz Marin Intl

lø. 9/12

5:05 am-11:10 am

1 stop6h 05m

$363

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

ma. 7/6

10:50 am-11:40 pm

1 stop12h 50m

San Juan Luis Munoz Marin Intl

ma. 7/13

10:20 pm-10:10 am

1 stop11h 50m

$406

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

ma. 8/24

5:15 am-8:38 pm

2 stops15h 23m

San Juan Luis Munoz Marin Intl

on. 8/26

2:20 pm-10:15 pm

1 stop7h 55m

$416

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

to. 7/30

5:30 pm-1:25 am

1 stop7h 55m

San Juan Luis Munoz Marin Intl

ma. 8/3

10:20 pm-11:10 am

1 stop12h 50m

$428

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

ti. 7/21

8:10 am-4:39 pm

1 stop8h 29m

San Juan Luis Munoz Marin Intl

ti. 8/4

2:32 pm-9:19 pm

1 stop6h 47m

$436

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

fr. 7/3

1:02 pm-10:27 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

lø. 7/11

6:05 am-3:05 pm

1 stop9h 00m

$464
Cheapest one-way

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

fr. 8/14

9:10 pm-4:11 pm

1 stop19h 01m

$129

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

lø. 8/1

11:17 am-8:45 pm

1 stop9h 28m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/4

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Best time to book a flight from Louisville to San Juan

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

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

Currently, January is the cheapest month in which you can book a flight from Louisville to San Juan (average of $113). Flying from Louisville to San Juan in March is currently the most expensive (average of $225). 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.

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

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

To ensure you get the cheapest price possible for a flight from Louisville to San Juan, you should look to book at least 70 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.

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated juni 9, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Louisville to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.6

Entertainment

7.5

Overall

7.9

Food

7.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Entertainment

7.5

Overall

7.9

Food

7.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Entertainment

7.5

Overall

7.9

Food

7.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Entertainment

7.5

Overall

7.9

Food

7.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Entertainment

7.5

Overall

7.9

Food

7.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Related info for your journey

Find useful and relevant information for your journey from Louisville to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Louisville to San Juan?

    Most people fly from Louisville Intl (SDF) if they book a flight from Louisville to San Juan. On average, Louisville Intl has 0 outbound flights to San Juan per day from 4 airlines. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

  • How long is the flight from Louisville to San Juan?

    A quick flight from Louisville to San Juan can take about 9h 55m. Delta provides one of the quickest options available for as low as $363. There are 1807 mi between Louisville and San Juan. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Louisville to San Juan round-trip from $198. Other airlines that can offer you cheap pricing are Southwest, from $225, and American Airlines, from $238. Delta is 53% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $113. However, be on the lookout for offers from American Airlines and Southwest, as they are both options that can get you from Louisville to San Juan for a low price.

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

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

  • How can I find direct flights from Louisville to San Juan?

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

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

    Yes. Cheapflights offers flight deals from Louisville to San Juan 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 Louisville to San Juan?

    Currently, January is the cheapest month in which you can book a flight from Louisville to San Juan (average of $113). Flying from Louisville to San Juan in March is currently the most expensive (average of $225). 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

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Top 4 airlines flying from Louisville to San Juan

Discover the top 4 airlines that operate flights from Louisville to San Juan. 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 juni 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$198Average$424FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$225Average$436FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$238Average$427FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$259Average$492FlexibilityNo cancel feeOn-time69%

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