$158+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SJU
Jul 12 — Jul 191
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Louisville to San JuanExplore 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 June 12, 2026.
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 June 12, 2026.
This Southwest deal was found by Cheapflights users on 6/9. 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.
Sat 8/1510:50 am
SDF
- SJU
1 stop7h 15m
Southwest
Thu 8/206:00 am
SJU
- SDF
1 stop7h 35m
Southwest
Deal found 6/9![Southwest logo]()
$220
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/276:00 am
SDF
- SJU
1 stop6h 54m
United Airlines
Sun 8/302:20 pm
SJU
- SDF
1 stop7h 55m
United Airlines
Deal found 6/11![United Airlines logo]()
$247
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 9/97:10 am
SDF
- SJU
1 stop7h 34m
United Airlines
Sun 9/132:20 pm
SJU
- SDF
1 stop7h 55m
United Airlines
Deal found 6/10![United Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 6/9. 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 9/257:27 pm
SDF
- SJU
2 stops15h 33m
American Airlines
Wed 9/302:58 pm
SJU
- SDF
2 stops8h 24m
American Airlines
Deal found 6/9![American Airlines logo]()
$268
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.
Mon 8/109:10 pm
SDF
- SJU
1 stop19h 01m
Multiple Airlines
Fri 8/146:00 am
SJU
- SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$290
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Sat 9/1211:00 am
SDF
- SJU
2 stops12h 50m
United Airlines
Fri 9/182:20 pm
SJU
- SDF
1 stop7h 55m
United Airlines
Deal found 6/9![United Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 6/9. 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 9/243:20 pm
SDF
- SJU
2 stops8h 30m
Southwest
Mon 9/286:00 am
SJU
- SDF
1 stop7h 35m
Southwest
Deal found 6/9![Southwest logo]()
$292
This American Airlines deal was found by Cheapflights users on 6/9. 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 8/287:31 am
SDF
- SJU
1 stop14h 53m
American Airlines
Fri 9/42:33 pm
SJU
- SDF
1 stop8h 26m
American Airlines
Deal found 6/9![American Airlines logo]()
$293
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.
Mon 8/38:48 pm
SDF
- SJU
1 stop19h 17m
Multiple Airlines
Fri 8/76:00 am
SJU
- SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$296
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:20 am
SDF
- SJU
1 stop10h 45m
Southwest
Thu 10/83:20 pm
SJU
- SDF
2 stops9h 20m
Southwest
Deal found 6/10![Southwest logo]()
$305
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 9/2210:23 am
SDF
- SJU
2 stops13h 27m
United Airlines
Thu 9/241:25 pm
SJU
- SDF
1 stop10h 24m
United Airlines
Deal found 6/11![United Airlines logo]()
$310
Best flights from Louisville to San JuanDiscover carefully curated flight deals from Louisville to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
Discover carefully curated flight deals from Louisville to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2026.
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:10 pm
SDF
- SJU
1 stop6h 55m
Southwest
Wed 8/1911:50 am
SJU
- SDF
2 stops8h 45m
Southwest
Deal found 6/10![Southwest logo]()
$268
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 9/97:10 am
SDF
- SJU
2 stops13h 28m
United Airlines
Sun 9/132:20 pm
SJU
- SDF
1 stop7h 55m
United Airlines
Deal found 6/10![United Airlines logo]()
$293
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:10 am
SDF
- SJU
1 stop8h 29m
Delta
Wed 8/55:49 pm
SJU
- SDF
1 stop6h 35m
Delta
Deal found 6/7![Delta logo]()
$326
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:20 am
SDF
- SJU
1 stop10h 45m
Southwest
Thu 10/83:20 pm
SJU
- SDF
2 stops9h 20m
Southwest
Deal found 6/10![Southwest logo]()
$305
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 9/226:15 am
SDF
- SJU
1 stop7h 38m
United Airlines
Thu 9/241:25 pm
SJU
- SDF
1 stop10h 24m
United Airlines
Deal found 6/11![United Airlines logo]()
$310
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:00 am
SDF
- SJU
1 stop5h 46m
Delta
Tue 8/112:59 pm
SJU
- SDF
1 stop9h 35m
Delta
Deal found 6/7![Delta logo]()
$353
This Southwest deal was found by Cheapflights users on 6/9. 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 9/33:05 pm
SDF
- SJU
2 stops8h 45m
Southwest
Mon 9/75:30 am
SJU
- SDF
1 stop10h 00m
Southwest
Deal found 6/9![Southwest logo]()
$358
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:17 am
SDF
- SJU
1 stop9h 28m
Delta
Tue 8/112:59 pm
SJU
- SDF
1 stop6h 34m
Delta
Deal found 6/7![Delta logo]()
$363
This Southwest deal was found by Cheapflights users on 6/9. 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.
Tue 9/17:05 am
SDF
- SJU
2 stops9h 20m
Southwest
Mon 9/75:30 am
SJU
- SDF
1 stop10h 00m
Southwest
Deal found 6/9![Southwest logo]()
$358
This Southwest deal was found by Cheapflights users on 6/9. 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.
Sun 9/134:05 pm
SDF
- SJU
2 stops8h 25m
Southwest
Sat 9/1910:25 am
SJU
- SDF
2 stops10h 55m
Southwest
Deal found 6/9![Southwest logo]()
$358
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/165:30 pm
SDF
- SJU
1 stop6h 40m
Southwest
Thu 7/2310:20 pm
SJU
- SDF
1 stop11h 50m
Southwest
Deal found 6/10![Southwest logo]()
$376
Last-minute flights from Louisville to San JuanDiscover last-minute flight deals from Louisville to San Juan. Data last updated June 12, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to San Juan. Data last updated June 12, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 6/9. 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.
Sun 7/56:35 pm
SDF
- SJU
1 stop5h 55m
Southwest
Fri 7/1010:20 pm
SJU
- SDF
1 stop12h 55m
Southwest
Deal found 6/9![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/165:30 pm
SDF
- SJU
1 stop6h 40m
Southwest
Thu 7/2310:20 pm
SJU
- SDF
1 stop11h 50m
Southwest
Deal found 6/10![Southwest logo]()
$376
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:10 am
SDF
- SJU
1 stop8h 29m
Delta
Wed 8/55:49 pm
SJU
- SDF
1 stop6h 35m
Delta
Deal found 6/7![Delta logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/278:24 pm
SDF
- SJU
1 stop28h 17m
Multiple Airlines
Fri 8/76:00 am
SJU
- SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/278:24 pm
SDF
- SJU
1 stop28h 17m
Multiple Airlines
Thu 8/65:22 pm
SJU
- SDF
1 stop21h 06m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Mon 7/278:24 pm
SDF
- SJU
1 stop28h 17m
Multiple Airlines
Mon 8/106:00 am
SJU
- SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 6/9. 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.
Tue 7/2812:40 pm
SDF
- SJU
1 stop11h 10m
Southwest
Sat 8/16:30 am
SJU
- SDF
1 stop11h 40m
Southwest
Deal found 6/9![Southwest logo]()
$371
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/309:19 pm
SDF
- SJU
1 stop28h 56m
Multiple Airlines
Fri 8/76:00 am
SJU
- SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$359
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3110:00 am
SDF
- SJU
1 stop10h 45m
Delta
Thu 8/65:49 pm
SJU
- SDF
1 stop6h 45m
Delta
Deal found 6/7![Delta logo]()
$316
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.
Fri 7/318:24 pm
SDF
- SJU
1 stop28h 17m
Multiple Airlines
Fri 8/76:00 am
SJU
- SDF
1 stop14h 20m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$325
One-way flights from Louisville to San JuanSearch for one-way flight options from Louisville to San Juan. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
Search for one-way flight options from Louisville to San Juan. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
This Delta deal was found by Cheapflights users on 6/12. 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.
Sat 8/11:16 pm
SDF
- SJU
1 stop9h 13m
Delta
Deal found 6/12![Delta logo]()
$158
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/38:48 pm
SDF
- SJU
1 stop19h 10m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$168
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:55 pm
SDF
- SJU
1 stop6h 25m
Southwest
Deal found 6/8![Southwest logo]()
$200
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.
Mon 7/68:48 pm
SDF
- SJU
2 stops27h 19m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$202
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.
Sat 6/207:43 am
SDF
- SJU
1 stop15h 17m
American Airlines
Deal found 6/8![American Airlines logo]()
$208
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/288:08 pm
SDF
- SJU
2 stops13h 31m
American Airlines
Deal found 6/7![American Airlines logo]()
$210
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:02 pm
SDF
- SJU
1 stop7h 41m
Delta
Deal found 6/7![Delta logo]()
$213
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.
Sun 6/288:49 pm
SDF
- SJU
1 stop27h 48m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$225
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.
Sat 6/278:06 pm
SDF
- SJU
2 stops52h 09m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$230
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 7/18:15 am
SDF
- SJU
1 stop14h 30m
American Airlines
Deal found 6/10![American Airlines logo]()
$240
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:55 pm
SDF
- SJU
1 stop6h 20m
Southwest
Deal found 6/7![Southwest logo]()
$248
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 June 12, 2026.
Round-trip from | $220 (Southwest) |
|---|---|
One-way from | $158 (Delta) |
Popular in | December |
Cheapest in | October |
Average price | $484 |
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 June 12, 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
Cheapest round-trip
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Mon 8/17
4:10 pm-11:05 pm
1 stop6h 55m
San Juan Luis Munoz Marin Intl
Wed 8/19
11:50 am-8:35 pm
2 stops8h 45m
$268
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Wed 9/9
7:10 am-8:38 pm
2 stops13h 28m
San Juan Luis Munoz Marin Intl
Sun 9/13
2:20 pm-10:15 pm
1 stop7h 55m
$293
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Sat 10/3
11:20 am-10:05 pm
1 stop10h 45m
San Juan Luis Munoz Marin Intl
Thu 10/8
3:20 pm-12:40 am
2 stops9h 20m
$305
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Tue 9/22
6:15 am-1:53 pm
1 stop7h 38m
San Juan Luis Munoz Marin Intl
Thu 9/24
1:25 pm-11:49 pm
1 stop10h 24m
$310
Quickest round-trip
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Tue 7/21
8:10 am-4:39 pm
1 stop8h 29m
San Juan Luis Munoz Marin Intl
Wed 8/5
5:49 pm-12:24 am
1 stop6h 35m
$326
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Mon 8/3
6:00 am-11:46 am
1 stop5h 46m
San Juan Luis Munoz Marin Intl
Tue 8/11
2:59 pm-12:34 am
1 stop9h 35m
$353
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Thu 9/3
3:05 pm-11:50 pm
2 stops8h 45m
San Juan Luis Munoz Marin Intl
Mon 9/7
5:30 am-3:30 pm
1 stop10h 00m
$358
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Tue 9/1
7:05 am-4:25 pm
2 stops9h 20m
San Juan Luis Munoz Marin Intl
Mon 9/7
5:30 am-3:30 pm
1 stop10h 00m
$358
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Sun 9/13
4:05 pm-12:30 am
2 stops8h 25m
San Juan Luis Munoz Marin Intl
Sat 9/19
10:25 am-9:20 pm
2 stops10h 55m
$358
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Sat 8/1
11:17 am-8:45 pm
1 stop9h 28m
San Juan Luis Munoz Marin Intl
Tue 8/11
2:59 pm-9:33 pm
1 stop6h 34m
$363
Showing 1-10 of 19 resultsSorted by cheapest first
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.
SDF-PR1
SDF-SJU
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
SDF-PR1
SDF-SJU
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 June 12, 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.
Boarding
8.1
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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.
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Alternative routes for Louisville to San Juan
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Complete your trip
Complete your trip to San Juan by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Louisville to San Juan by cabin class
Find flights from Louisville to San Juan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Louisville and San Juan flights
Browse other Louisville and San Juan flight options. Last updated on June 12, 2026.
Other flights from Louisville
Browse through other flights departing from Louisville. Flights are based on user searches made on Cheapflights and were last updated on June 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 June 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$198 | Average$424 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$225 | Average$436 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$238 | Average$427 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$259 | Average$492 | FlexibilityNo cancel fee | On-time69% |