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Luis Munoz Marin Intl

$95+ Cheap flights from Louisville (SDF) to Luis Munoz Marin Intl (SJU)

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SJU
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Louisville to Luis Munoz Marin Intl with Cheapflights

1. Tell us where you want to go

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2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Louisville Intl to San Juan Luis Munoz Marin Intl are usually found in September or October, booked 41 days in advance, depart on a Tuesday or Sunday and return on a Thursday

Cheap flight deals from Louisville to Luis Munoz Marin Intl

Cheapest flights from Louisville to Luis Munoz Marin Intl
Explore the most affordable flight options available from Louisville to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:05 amSDF - SJU
1 stop16h 00mSpirit Airlines
Thu 12/256:28 pmSJU - SDF
1 stop6h 31mSpirit Airlines
Deal found 12/11$375
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:55 amSDF - SJU
1 stop11h 50mSpirit Airlines
Sun 12/216:28 pmSJU - SDF
1 stop6h 31mSpirit Airlines
Deal found 12/10$392
This Delta deal was found by Cheapflights users on 12/11. 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 12/153:16 pmSDF - SJU
1 stop7h 04mDelta
Mon 12/223:44 pmSJU - SDF
1 stop8h 14mDelta
Deal found 12/11$393
This American Airlines deal was found by Cheapflights users on 12/10. 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.
Fri 12/1211:10 amSDF - SJU
2 stops9h 59mAmerican Airlines
Sun 12/212:44 pmSJU - SDF
1 stop8h 30mAmerican Airlines
Deal found 12/10$418
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:05 amSDF - SJU
1 stop16h 00mSpirit Airlines
Sun 12/286:28 pmSJU - SDF
1 stop6h 31mSpirit Airlines
Deal found 12/11$423
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:05 amSDF - SJU
1 stop16h 00mSpirit Airlines
Sat 12/276:28 pmSJU - SDF
1 stop6h 31mSpirit Airlines
Deal found 12/10$436
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Thu 12/259:05 amSDF - SJU
2 stops10h 04mUnited Airlines
Sun 12/287:00 amSJU - SDF
1 stop9h 03mUnited Airlines
Deal found 12/11$445
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:05 amSDF - SJU
1 stop16h 00mSpirit Airlines
Thu 1/16:28 pmSJU - SDF
1 stop6h 31mSpirit Airlines
Deal found 12/11$453
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/119:31 amSDF - SJU
1 stop10h 55mUnited Airlines
Sat 12/138:10 amSJU - SDF
1 stop10h 06mUnited Airlines
Deal found 12/10$481
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:05 amSDF - SJU
1 stop16h 00mSpirit Airlines
Sun 12/286:28 pmSJU - SDF
1 stop6h 31mSpirit Airlines
Deal found 12/11$488
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:05 amSDF - SJU
1 stop16h 00mSpirit Airlines
Sun 12/286:28 pmSJU - SDF
1 stop6h 31mSpirit Airlines
Deal found 12/11$494

Find flight deals from Louisville to Luis Munoz Marin Intl

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Luis Munoz Marin Intl (SJU). 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 December 12, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$205
(WAYA)

One-way from

$95
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$565
Provider with most accurate pricing for Louisville Intl-San Juan Luis Munoz Marin Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-San Juan Luis Munoz Marin Intl flights.
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From Louisville Intl to San Juan Luis Munoz Marin Intl
Search Deals
One-way flight from Louisville Intl to San Juan Luis Munoz Marin Intl
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Luis Munoz Marin Intl 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 December 12, 2025.
Use the filters below to find and compare flights from Louisville to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Louisville

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Fri 1/23

2:10 pm-10:22 pm

1 stop7h 12m

San Juan Luis Munoz Marin Intl

Sat 1/24

7:45 am-8:28 pm

2 stops13h 43m

$220

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Wed 1/28

5:35 am-5:17 pm

1 stop10h 42m

San Juan Luis Munoz Marin Intl

Tue 2/3

2:15 pm-7:39 pm

1 stop6h 24m

$225

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Thu 1/22

7:00 am-11:56 pm

1 stop15h 56m

San Juan Luis Munoz Marin Intl

Wed 1/28

5:51 pm-11:59 pm

1 stop7h 08m

$225

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Tue 1/27

7:00 am-5:17 pm

1 stop9h 17m

San Juan Luis Munoz Marin Intl

Tue 2/3

2:15 pm-11:50 pm

1 stop10h 35m

$225

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Tue 1/20

5:35 am-1:06 pm

1 stop6h 31m

San Juan Luis Munoz Marin Intl

Thu 1/29

3:55 pm-11:50 pm

1 stop8h 55m

$225

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Thu 3/5

7:00 am-9:33 pm

1 stop13h 33m

San Juan Luis Munoz Marin Intl

Sat 3/7

1:30 am-9:09 am

1 stop8h 39m

$265

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Thu 1/29

11:16 am-11:56 pm

1 stop11h 40m

San Juan Luis Munoz Marin Intl

Sat 2/7

7:00 am-9:16 pm

1 stop15h 16m

$265

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Thu 1/22

7:00 am-11:56 pm

1 stop15h 56m

San Juan Luis Munoz Marin Intl

Mon 1/26

11:38 am-10:12 pm

2 stops11h 34m

$265

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Sat 1/31

2:05 pm-6:11 am

2 stops15h 06m

San Juan Luis Munoz Marin Intl

Thu 2/5

8:10 am-8:28 pm

2 stops13h 18m

$315

LouisvilleSan Juan

SDF - SJU

SDFSJU

Louisville Intl

Mon 1/26

6:00 am-4:36 pm

1 stop9h 36m

San Juan Luis Munoz Marin Intl

Thu 1/29

8:10 am-2:48 pm

1 stop7h 38m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 19 results
1
2

Compare providers for flights from Louisville to Luis Munoz Marin Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to Luis Munoz Marin Intl in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Louisville-San Juan Luis Munoz Marin Intl Airport flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Louisville-San Juan Luis Munoz Marin Intl Airport flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from Louisville-San Juan Luis Munoz Marin Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-San Juan Luis Munoz Marin Intl Airport flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-San Juan Luis Munoz Marin Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Louisville to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Louisville to Luis Munoz Marin Intl. Price data was last updated on December 5, 2025.

The price you pay for your flight from Louisville to San Juan Luis Munoz Marin Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Louisville to San Juan Luis Munoz Marin Intl Airport (average of $128). Flying from Louisville to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $252). 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 Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

It’s optimal to fly from Louisville to San Juan Luis Munoz Marin Intl Airport in the evening. By choosing this option you can save up to 24% 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 Luis Munoz Marin Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Louisville to Luis Munoz Marin Intl. Price data was last updated on December 16, 2024.

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

How much does it cost to fly round-trip from Louisville to San Juan Luis Munoz Marin Intl Airport?

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl. Reviews last updated December 12, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Louisville to San Juan Luis Munoz Marin Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,008 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,095 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,050 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Spirit Airlines
6.3
Okay
8,179 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Louisville to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl?

    For a flight from Louisville to San Juan Luis Munoz Marin Intl, you will be flying from Louisville Intl. Louisville Intl (SDF) is just 5.3 mi from the center of the city. Louisville Intl is the only Louisville airport and it handles 0 outbound flights to San Juan Luis Munoz Marin Intl per day. 5 airlines have flights to San Juan Luis Munoz Marin Intl from Louisville Intl on a regular basis.

  • How long is the flight from Louisville to San Juan Luis Munoz Marin Intl Airport?

    A quick flight from Louisville to San Juan Luis Munoz Marin Intl Airport can take about 7h 12m. United Airlines provides one of the quickest options available for as low as $220. The distance between Louisville and San Juan Luis Munoz Marin Intl Airport is about 1807 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Louisville to San Juan Luis Munoz Marin Intl Airport round-trip?

    According to our current data, Spirit Airlines ($152), Delta ($215), and Southwest ($225) offers the cheapest pricing from Louisville to San Juan Luis Munoz Marin Intl Airport. Spirit Airlines is priced at 64% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Louisville to San Juan Luis Munoz Marin Intl Airport one-way?

    The cheapest airlines for a one-way flight from Louisville to San Juan Luis Munoz Marin Intl Airport are Spirit Airlines ($79), American Airlines ($112), and Delta ($137).

  • Can I find deals for flights from Louisville to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Louisville to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Luis Munoz Marin Intl?

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

  • Can I find deals for business class flights from Louisville to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Louisville to Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Louisville to San Juan Luis Munoz Marin Intl Airport (average of $128). Flying from Louisville to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $252). 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

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Dorado
Fajardo
Rio Grande
Humacao
Luquillo
Bayamón

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Louisville to Luis Munoz Marin Intl

Discover the top 5 airlines that operate flights from Louisville to Luis Munoz Marin Intl. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$152Average$300FlexibilityNo cancel feeOn-time65%
DeltaCheapest$221Average$402FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$225Average$471FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$255Average$453FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$259Average$559FlexibilityNo cancel feeOn-time69%

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