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San Juan

$108+ 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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SJU
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to San Juan are usually found in August or January, booked 12 days in advance, depart on a Tuesday or Sunday and return on a Thursday

Cheap 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 April 17, 2025.

Round-trip from

$215
(Southwest)

One-way from

$108
(Southwest)

Popular in

March

Cheapest in

August

Average price

$455
From Louisville Intl to San Juan
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One-way flight from Louisville Intl to San Juan
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Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find 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 April 17, 2025.

This Southwest deal was found by Cheapflights users on 4/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/811:15 amSDF - SJU
1 stop10h 50mSouthwest
Sun 5/117:05 amSJU - SDF
1 stop11h 30mSouthwest
Deal found 4/17$215
This FlightHub deal was found by Cheapflights users on 4/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/285:45 amSDF - SJU
1 stop9h 50mSpirit Airlines
Tue 5/69:25 amSJU - SDF
1 stop12h 52mSpirit Airlines
Deal found 4/17$237
This Delta deal was found by Cheapflights users on 4/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/132:59 pmSDF - SJU
1 stop7h 22mDelta
Tue 10/282:28 pmSJU - SDF
1 stop9h 28mDelta
Deal found 4/17$245
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Mon 10/138:28 pmSDF - SJU
1 stop14h 22mAmerican Airlines
Tue 10/281:55 pmSJU - SDF
2 stops7h 59mAmerican Airlines
Deal found 4/17$285
This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/172:07 pmSDF - SJU
3 stops20h 38mMultiple Airlines
Sat 5/248:12 pmSJU - SDF
2 stops18h 51mMultiple Airlines
Deal found 4/17$329
This United Airlines deal was found by Cheapflights users on 4/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:45 amSDF - SJU
1 stop7h 00mUnited Airlines
Fri 5/91:05 amSJU - SDF
2 stops12h 20mUnited Airlines
Deal found 4/17$335

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 April 17, 2025.
Use the filters below to find and compare flights from Louisville to San Juan that are best for you.

Fly from

Louisville

Fly to

San Juan

Route

Depart

Return

Price

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Thu 5/8

11:15 am-10:05 pm

1 stop10h 50m

San Juan Luis Munoz Marin Intl

Sun 5/11

7:05 am-6:35 pm

1 stop11h 30m

$215

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Mon 4/28

5:45 am-3:35 pm

1 stop9h 50m

San Juan Luis Munoz Marin Intl

Tue 5/6

9:25 am-10:17 pm

1 stop12h 52m

$237

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Mon 10/13

2:59 pm-10:21 pm

1 stop7h 22m

San Juan Luis Munoz Marin Intl

Tue 10/28

2:28 pm-11:56 pm

1 stop9h 28m

$245

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Tue 4/29

6:00 am-2:27 pm

1 stop8h 27m

San Juan Luis Munoz Marin Intl

Tue 5/6

5:25 am-5:55 pm

1 stop12h 30m

$275

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Sat 5/17

2:07 pm-10:45 am

3 stops20h 38m

San Juan Luis Munoz Marin Intl

Sat 5/24

8:12 pm-3:03 pm

2 stops18h 51m

$329

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Wed 4/30

6:45 am-1:45 pm

1 stop7h 00m

San Juan Luis Munoz Marin Intl

Fri 5/9

1:05 am-1:25 pm

2 stops12h 20m

$335

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Sun 5/11

5:10 pm-11:40 pm

1 stop6h 30m

$108

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Mon 8/25

6:00 am-11:51 am

1 stop5h 51m

$113

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Mon 8/25

2:37 pm-11:10 am

2 stops20h 33m

$128

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Tue 4/29

7:03 am-3:40 pm

1 stop8h 37m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 13 results
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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

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

Use this chart to determine the optimal time to book a round-trip flight from Louisville to San Juan. Price data was last updated on April 11, 2025.

To ensure you get the cheapest price possible for a flight from Louisville to San Juan, you should look to book at least 12 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.

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

Currently, September is the cheapest month in which you can book a flight from Louisville to San Juan (average of $254). Flying from Louisville to San Juan in December is currently the most expensive (average of $336). 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.

What is the cheapest time of day to fly from SDF to SJU?

Find hourly flight availability from Louisville to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

It’s optimal to fly from Louisville to San Juan in the evening. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Louisville to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Louisville to San Juan. Price data was last updated on April 7, 2024.

Travelers seeking maximum savings on their Louisville to San Juan flight should consider departing on Thursday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan when rainfall is around 2.2 in.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

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 April 17, 2025.
To help decide which airline to fly from Louisville to San Juan, see what other customers have to say about Southwest, Delta and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,280 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,280 reviews
Southwest
8.0
Very good
4,280 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,917 reviews
Southwest
8.0
Very good
4,280 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,667 reviews
Southwest
8.0
Very good
4,280 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,280 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Spirit Airlines
6.3
Okay
7,926 reviews
Southwest
8.0
Very good
4,280 reviews

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 5 airlines. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

  • 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 $215. Other airlines that can offer you cheap pricing are Spirit Airlines, from $237, and Delta, from $275. Southwest is 50% 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 Southwest, with whom users have recently found tickets for as low as $108. However, be on the lookout for offers from United Airlines and Spirit Airlines, 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, September is the cheapest month in which you can book a flight from Louisville to San Juan (average of $254). Flying from Louisville to San Juan in December is currently the most expensive (average of $336). 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 5 airlines flying from Louisville to San Juan

Discover the top 5 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$179Average$295FlexibilityNo cancel feeOn-time65%
DeltaCheapest$254Average$372FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$273Average$477FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$275Average$564FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$585FlexibilityNo cancel feeOn-time63%

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