$111+ 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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SJU
Apr 12 — Apr 191
Round-trip
1 adult, Economy
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Find cheap flights from Louisville to San Juan with Cheapflights
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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 March 13, 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 March 13, 2026.
This United Airlines deal was found by Cheapflights users on 3/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/79:00 am
SDF
- SJU
2 stops12h 22m
United Airlines
Wed 11/118:30 am
SJU
- SDF
1 stop7h 17m
United Airlines
Deal found 3/8![United Airlines logo]()
$276
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:52 pm
SDF
- SJU
1 stop14h 56m
American Airlines
Thu 4/2310:03 am
SJU
- SDF
1 stop13h 56m
American Airlines
Deal found 3/12![American Airlines logo]()
$282
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:32 am
SDF
- SJU
1 stop11h 06m
United Airlines
Tue 10/277:30 am
SJU
- SDF
1 stop7h 17m
United Airlines
Deal found 3/12![United Airlines logo]()
$296
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/103:05 pm
SDF
- SJU
1 stop8h 10m
Delta
Thu 4/165:34 pm
SJU
- SDF
1 stop6h 25m
Delta
Deal found 3/9![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:43 am
SDF
- SJU
1 stop11h 08m
American Airlines
Sat 4/187:25 am
SJU
- SDF
1 stop14h 03m
American Airlines
Deal found 3/12![American Airlines logo]()
$311
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/83:24 pm
SDF
- SJU
1 stop6h 35m
Delta
Thu 11/193:35 pm
SJU
- SDF
1 stop9h 27m
Delta
Deal found 3/9![Delta logo]()
$316
This Southwest deal was found by Cheapflights users on 3/8. 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.
Fri 5/812:15 pm
SDF
- SJU
1 stop11h 10m
Southwest
Sun 5/106:25 am
SJU
- SDF
1 stop10h 05m
Southwest
Deal found 3/8![Southwest logo]()
$322
This United Airlines deal was found by Cheapflights users on 3/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:10 am
SDF
- SJU
2 stops11h 28m
United Airlines
Tue 5/197:20 am
SJU
- SDF
1 stop7h 27m
United Airlines
Deal found 3/8![United Airlines logo]()
$324
This Mytrip deal was found by Cheapflights users on 3/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2412:42 pm
SDF
- SJU
1 stop6h 13m
Spirit Airlines
Thu 3/261:45 am
SJU
- SDF
1 stop9h 29m
Spirit Airlines
Deal found 3/10![Spirit Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Fri 4/107:48 pm
SDF
- SJU
1 stop16h 45m
Multiple Airlines
Thu 4/167:17 pm
SJU
- SDF
2 stops23h 41m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$330
This Delta deal was found by Cheapflights users on 3/13. 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.
Thu 4/304:37 pm
SDF
- SJU
1 stop6h 36m
Delta
Sat 5/25:34 pm
SJU
- SDF
1 stop6h 25m
Delta
Deal found 3/13![Delta logo]()
$331
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 March 13, 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 March 13, 2026.
This Southwest deal was found by Cheapflights users on 3/8. 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.
Fri 5/812:15 pm
SDF
- SJU
1 stop11h 10m
Southwest
Sun 5/106:25 am
SJU
- SDF
1 stop10h 05m
Southwest
Deal found 3/8![Southwest logo]()
$322
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Mon 5/119:10 am
SDF
- SJU
2 stops12h 14m
United Airlines
Thu 5/141:25 pm
SJU
- SDF
1 stop8h 57m
United Airlines
Deal found 3/10![United Airlines logo]()
$434
This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:30 pm
SDF
- SJU
1 stop7h 50m
Southwest
Mon 7/205:15 pm
SJU
- SDF
1 stop7h 10m
Southwest
Deal found 3/12![Southwest logo]()
$396
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 5/194:17 pm
SDF
- SJU
1 stop7h 33m
United Airlines
Thu 5/281:25 pm
SJU
- SDF
1 stop9h 25m
United Airlines
Deal found 3/9![United Airlines logo]()
$440
This Southwest deal was found by Cheapflights users on 3/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/202:40 pm
SDF
- SJU
2 stops9h 15m
Southwest
Fri 4/242:00 pm
SJU
- SDF
2 stops9h 45m
Southwest
Deal found 3/11![Southwest logo]()
$416
This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/812:15 pm
SDF
- SJU
1 stop11h 10m
Southwest
Mon 5/115:05 am
SJU
- SDF
2 stops11h 45m
Southwest
Deal found 3/12![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 3/8. 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.
Thu 5/142:40 pm
SDF
- SJU
2 stops9h 15m
Southwest
Sun 5/179:45 pm
SJU
- SDF
1 stop12h 50m
Southwest
Deal found 3/8![Southwest logo]()
$426
This Southwest deal was found by Cheapflights users on 3/8. 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.
Sun 7/57:20 am
SDF
- SJU
2 stops9h 05m
Southwest
Sat 7/115:00 am
SJU
- SDF
1 stop7h 10m
Southwest
Deal found 3/8![Southwest logo]()
$433
This Southwest deal was found by Cheapflights users on 3/13. 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 3/304:30 pm
SDF
- SJU
1 stop6h 25m
Southwest
Sat 4/48:50 pm
SJU
- SDF
1 stop12h 35m
Southwest
Deal found 3/13![Southwest logo]()
$473
Last-minute flights from Louisville to San JuanDiscover last-minute flight deals from Louisville to San Juan. Data last updated March 13, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to San Juan. Data last updated March 13, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 3/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2412:42 pm
SDF
- SJU
1 stop6h 13m
Spirit Airlines
Thu 3/261:45 am
SJU
- SDF
1 stop9h 29m
Spirit Airlines
Deal found 3/10![Spirit Airlines logo]()
$329
This CheapOair deal was found by Cheapflights users on 3/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/293:33 pm
SDF
- SJU
1 stop20h 16m
Spirit Airlines
Wed 4/17:54 pm
SJU
- SDF
1 stop18h 39m
Spirit Airlines
Deal found 3/9![Spirit Airlines logo]()
$339
This CheapOair deal was found by Cheapflights users on 3/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/112:09 pm
SDF
- SJU
1 stop9h 50m
Spirit Airlines
Mon 4/67:54 pm
SJU
- SDF
1 stop15h 53m
Spirit Airlines
Deal found 3/13![Spirit Airlines logo]()
$340
This CheapOair deal was found by Cheapflights users on 3/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/712:42 pm
SDF
- SJU
1 stop6h 13m
Spirit Airlines
Mon 4/137:54 pm
SJU
- SDF
1 stop15h 53m
Spirit Airlines
Deal found 3/8![Spirit Airlines logo]()
$336
This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/103:05 pm
SDF
- SJU
1 stop8h 10m
Delta
Thu 4/165:34 pm
SJU
- SDF
1 stop6h 25m
Delta
Deal found 3/9![Delta logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Fri 4/107:48 pm
SDF
- SJU
1 stop16h 45m
Multiple Airlines
Thu 4/167:17 pm
SJU
- SDF
2 stops23h 41m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$330
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:43 am
SDF
- SJU
1 stop11h 08m
American Airlines
Sat 4/187:25 am
SJU
- SDF
1 stop14h 03m
American Airlines
Deal found 3/12![American Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/137:48 pm
SDF
- SJU
1 stop16h 01m
Multiple Airlines
Sat 4/1811:30 am
SJU
- SDF
2 stops25h 56m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:52 pm
SDF
- SJU
1 stop14h 56m
American Airlines
Thu 4/2310:03 am
SJU
- SDF
1 stop13h 56m
American Airlines
Deal found 3/12![American Airlines logo]()
$282
This American Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 4/207:52 pm
SDF
- SJU
1 stop16h 11m
American Airlines
Wed 4/2911:43 am
SJU
- SDF
1 stop12h 16m
American Airlines
Deal found 3/8![American Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 3/13. 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.
Thu 4/304:37 pm
SDF
- SJU
1 stop6h 36m
Delta
Sat 5/25:34 pm
SJU
- SDF
1 stop6h 25m
Delta
Deal found 3/13![Delta logo]()
$331
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 March 13, 2026.
Search for one-way flight options from Louisville to San Juan. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
This American Airlines deal was found by Cheapflights users on 3/8. 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 4/117:52 pm
SDF
- SJU
1 stop14h 56m
American Airlines
Deal found 3/8![American Airlines logo]()
$111
This Delta deal was found by Cheapflights users on 3/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:36 pm
SDF
- SJU
1 stop5h 36m
Delta
Deal found 3/8![Delta logo]()
$113
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Tue 5/52:30 pm
SDF
- SJU
1 stop6h 54m
United Airlines
Deal found 3/10![United Airlines logo]()
$121
This American Airlines deal was found by Cheapflights users on 3/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/76:59 am
SDF
- SJU
1 stop17h 00m
American Airlines
Deal found 3/11![American Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/309:13 pm
SDF
- SJU
1 stop21h 42m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$156
This American Airlines deal was found by Cheapflights users on 3/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:55 pm
SDF
- SJU
1 stop8h 37m
American Airlines
Deal found 3/11![American Airlines logo]()
$158
This American Airlines deal was found by Cheapflights users on 3/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:33 am
SDF
- SJU
2 stops10h 37m
American Airlines
Deal found 3/11![American Airlines logo]()
$163
This Cheapflightsfares deal was found by Cheapflights users on 3/10. 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.
Wed 4/112:09 pm
SDF
- SJU
1 stop9h 50m
Spirit Airlines
Deal found 3/10![Spirit Airlines logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 3/239:13 pm
SDF
- SJU
1 stop21h 42m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$173
This Southwest deal was found by Cheapflights users on 3/10. 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 5/185:55 pm
SDF
- SJU
1 stop6h 00m
Southwest
Deal found 3/10![Southwest logo]()
$176
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 March 13, 2026.
Round-trip from | $282 (American Airlines) |
|---|---|
One-way from | $111 (American Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $476 |
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 March 13, 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
Fri 5/8
12:15 pm-11:25 pm
1 stop11h 10m
San Juan Luis Munoz Marin Intl
Sun 5/10
6:25 am-4:30 pm
1 stop10h 05m
$322
Quickest round-trip
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Mon 7/13
5:30 pm-1:20 am
1 stop7h 50m
San Juan Luis Munoz Marin Intl
Mon 7/20
5:15 pm-12:25 am
1 stop7h 10m
$396
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Mon 4/20
2:40 pm-11:55 pm
2 stops9h 15m
San Juan Luis Munoz Marin Intl
Fri 4/24
2:00 pm-11:45 pm
2 stops9h 45m
$416
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Fri 5/8
12:15 pm-11:25 pm
1 stop11h 10m
San Juan Luis Munoz Marin Intl
Mon 5/11
5:05 am-4:50 pm
2 stops11h 45m
$417
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Thu 5/14
2:40 pm-11:55 pm
2 stops9h 15m
San Juan Luis Munoz Marin Intl
Sun 5/17
9:45 pm-10:35 am
1 stop12h 50m
$426
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Sun 7/5
7:20 am-4:25 pm
2 stops9h 05m
San Juan Luis Munoz Marin Intl
Sat 7/11
5:00 am-12:10 pm
1 stop7h 10m
$433
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Mon 5/11
9:10 am-9:24 pm
2 stops12h 14m
San Juan Luis Munoz Marin Intl
Thu 5/14
1:25 pm-10:22 pm
1 stop8h 57m
$434
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Tue 5/19
4:17 pm-11:50 pm
1 stop7h 33m
San Juan Luis Munoz Marin Intl
Thu 5/28
1:25 pm-10:50 pm
1 stop9h 25m
$440
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Mon 3/30
4:30 pm-10:55 pm
1 stop6h 25m
San Juan Luis Munoz Marin Intl
Sat 4/4
8:50 pm-9:25 am
1 stop12h 35m
$473
Cheapest one-way
Quickest one-way
LouisvilleSan Juan
SDF - SJU
SDFSJU
Louisville Intl
Fri 4/24
5:36 pm-11:12 pm
1 stop5h 36m
$113
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
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 March 6, 2026.
To ensure you get the cheapest price possible for a flight from Louisville to San Juan, you should look to book at least 90 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, January is the cheapest month in which you can book a flight from Louisville to San Juan (average of $168). Flying from Louisville to San Juan 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.
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 March 13, 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.
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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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Louisville and San Juan flights
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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 March 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$205 | Average$396 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$209 | Average$366 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$225 | Average$426 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$246 | Average$416 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$259 | Average$508 | FlexibilityNo cancel fee | On-time69% |