$88+ Cheap flights from Key Largo, FL to Puerto Rico
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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Aug 18 — Aug 251
Round-trip
1 adult, Economy
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Find cheap flights from Key Largo to Puerto Rico with Cheapflights
1. Tell us where you want to go
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 Key Largo to Puerto RicoExplore the most affordable flight options available from Key Largo to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 19, 2026.
Explore the most affordable flight options available from Key Largo to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 19, 2026.
This Super.com deal was found by Cheapflights users on 7/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Fri 7/247:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/18![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 7/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Sat 8/85:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/15![Frontier logo]()
$173
This Frontier deal was found by Cheapflights users on 7/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:28 pm
MIA
- SJU
Nonstop2h 48m
Frontier
Tue 10/277:24 pm
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 7/15![Frontier logo]()
$174
This Super.com deal was found by Cheapflights users on 7/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/219:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Thu 7/237:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$175
This deal was found by Cheapflights users on 7/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:16 pm
MIA
- SJU
Nonstop2h 44m
Frontier
Tue 9/159:05 pm
SJU
- MIA
Nonstop2h 50m
Frontier
Deal found 7/15![Frontier logo]()
$176
This Frontier deal was found by Cheapflights users on 7/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:50 pm
MIA
- SJU
1 stop14h 14m
Frontier
Tue 11/38:24 pm
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 7/15![Frontier logo]()
$177
This CheapOair deal was found by Cheapflights users on 7/15. 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.
Thu 8/139:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Sun 8/167:10 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/15![Frontier logo]()
$178
This eDestinos deal was found by Cheapflights users on 7/14. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Thu 7/307:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$179
This FlightHub deal was found by Cheapflights users on 7/19. 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.
Wed 10/147:00 am
MIA
- SJU
1 stop7h 46m
Frontier
Wed 10/216:00 am
SJU
- MIA
Nonstop2h 50m
Frontier
Deal found 7/19![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 7/279:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Wed 7/297:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/15![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 7/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/33:39 pm
MIA
- SJU
Nonstop2h 40m
Frontier
Sun 11/88:24 pm
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 7/16![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 7/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Wed 7/297:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$183
Best flights from Key Largo to Puerto RicoDiscover carefully curated flight deals from Key Largo to Puerto Rico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 19, 2026.
Discover carefully curated flight deals from Key Largo to Puerto Rico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 19, 2026.
This Southwest deal was found by Cheapflights users on 7/16. 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 9/27:10 am
MIA
- SJU
1 stop5h 10m
Southwest
Wed 9/910:30 am
SJU
- MIA
2 stops11h 20m
Southwest
Deal found 7/16![Southwest logo]()
$260
This Delta deal was found by Cheapflights users on 7/15. 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 9/112:05 pm
MIA
- SJU
1 stop10h 24m
Delta
Sat 9/125:59 pm
SJU
- MIA
1 stop6h 56m
Delta
Deal found 7/15![Delta logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 7/319:33 pm
MIA
- CPX
1 stop13h 46m
Multiple Airlines
Tue 8/41:06 pm
CPX
- MIA
1 stop20h 49m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$435
This Southwest deal was found by Cheapflights users on 7/17. 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.
Fri 9/1812:50 pm
MIA
- SJU
2 stops11h 00m
Southwest
Sun 9/206:35 am
SJU
- MIA
2 stops11h 00m
Southwest
Deal found 7/17![Southwest logo]()
$260
This Southwest deal was found by Cheapflights users on 7/18. 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 9/129:40 am
MIA
- SJU
2 stops9h 40m
Southwest
Sat 9/195:05 am
SJU
- MIA
2 stops11h 10m
Southwest
Deal found 7/18![Southwest logo]()
$266
This United Airlines deal was found by Cheapflights users on 7/16. 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 9/2311:26 am
MIA
- BQN
1 stop11h 43m
United Airlines
Fri 9/2512:15 am
BQN
- MIA
1 stop9h 57m
United Airlines
Deal found 7/16![United Airlines logo]()
$602
This Southwest deal was found by Cheapflights users on 7/15. 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 10/2212:30 pm
MIA
- SJU
1 stop11h 35m
Southwest
Mon 10/266:30 am
SJU
- MIA
1 stop5h 20m
Southwest
Deal found 7/15![Southwest logo]()
$278
This Southwest deal was found by Cheapflights users on 7/14. 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 9/237:30 am
MIA
- SJU
2 stops11h 30m
Southwest
Fri 9/252:35 pm
SJU
- MIA
1 stop7h 30m
Southwest
Deal found 7/14![Southwest logo]()
$278
This Southwest deal was found by Cheapflights users on 7/15. 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 9/169:15 am
MIA
- SJU
2 stops11h 50m
Southwest
Tue 9/2210:30 am
SJU
- MIA
2 stops9h 40m
Southwest
Deal found 7/15![Southwest logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 7/14. 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.
Wed 7/292:53 pm
MIA
- MAZ
2 stops25h 18m
Multiple Airlines
Sun 8/24:36 pm
MAZ
- MIA
1 stop17h 39m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$444
This Southwest deal was found by Cheapflights users on 7/18. 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 8/174:50 pm
MIA
- SJU
1 stop5h 20m
Southwest
Wed 8/198:20 am
SJU
- MIA
2 stops11h 50m
Southwest
Deal found 7/18![Southwest logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 7/14. 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 9/49:48 pm
MIA
- VQS
1 stop12h 07m
Multiple Airlines
Mon 9/73:00 pm
VQS
- MIA
1 stop19h 15m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$453
This Southwest deal was found by Cheapflights users on 7/15. 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 8/274:50 pm
MIA
- SJU
1 stop5h 20m
Southwest
Sun 8/306:00 am
SJU
- MIA
2 stops11h 35m
Southwest
Deal found 7/15![Southwest logo]()
$300
This Southwest deal was found by Cheapflights users on 7/16. 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 1/1210:05 am
MIA
- SJU
2 stops12h 00m
Southwest
Sat 1/307:50 am
SJU
- MIA
1 stop5h 05m
Southwest
Deal found 7/16![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 7/14. 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 9/238:45 am
MIA
- BQN
1 stop14h 24m
United Airlines
Sat 9/2612:15 am
BQN
- MIA
1 stop9h 57m
United Airlines
Deal found 7/14![United Airlines logo]()
$602
This Southwest deal was found by Cheapflights users on 7/14. 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 10/196:10 pm
MIA
- SJU
1 stop7h 10m
Southwest
Fri 10/2312:35 pm
SJU
- MIA
2 stops11h 10m
Southwest
Deal found 7/14![Southwest logo]()
$314
This United Airlines deal was found by Cheapflights users on 7/16. 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 9/223:57 pm
MIA
- BQN
2 stops31h 12m
United Airlines
Fri 9/2512:15 am
BQN
- MIA
1 stop9h 57m
United Airlines
Deal found 7/16![United Airlines logo]()
$653
This Southwest deal was found by Cheapflights users on 7/14. 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 8/267:30 am
MIA
- SJU
2 stops10h 40m
Southwest
Sun 8/306:00 am
SJU
- MIA
2 stops11h 35m
Southwest
Deal found 7/14![Southwest logo]()
$314
This United Airlines deal was found by Cheapflights users on 7/15. 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 10/151:25 pm
MIA
- BQN
1 stop9h 44m
United Airlines
Sat 10/1712:15 am
BQN
- MIA
2 stops35h 40m
United Airlines
Deal found 7/15![United Airlines logo]()
$658
This United deal was found by Cheapflights users on 7/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/51:10 pm
MIA
- MAZ
2 stops20h 32m
Multiple Airlines
Sat 8/84:36 pm
MAZ
- MIA
2 stops18h 36m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$696
This United deal was found by Cheapflights users on 7/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:30 am
MIA
- VQS
2 stops22h 00m
Multiple Airlines
Sun 8/303:18 pm
VQS
- MIA
2 stops18h 54m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$706
This United Airlines deal was found by Cheapflights users on 7/14. 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 9/241:25 pm
MIA
- BQN
1 stop9h 44m
United Airlines
Sat 9/2612:15 am
BQN
- MIA
2 stops11h 05m
United Airlines
Deal found 7/14![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Fri 8/147:00 am
MIA
- BQN
1 stop16h 09m
United Airlines
Thu 8/2012:15 am
BQN
- MIA
1 stop9h 57m
United Airlines
Deal found 7/17![United Airlines logo]()
$802
This United deal was found by Cheapflights users on 7/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/51:10 pm
MIA
- CPX
2 stops19h 24m
Multiple Airlines
Sat 8/85:41 pm
CPX
- MIA
2 stops17h 31m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$821
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/177:00 am
MIA
- BQN
1 stop16h 09m
United Airlines
Thu 8/2012:15 am
BQN
- MIA
1 stop9h 57m
United Airlines
Deal found 7/16![United Airlines logo]()
$802
This United deal was found by Cheapflights users on 7/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/284:53 pm
MIA
- MAZ
2 stops16h 49m
Multiple Airlines
Sun 8/24:36 pm
MAZ
- MIA
2 stops18h 36m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$821
This United Airlines deal was found by Cheapflights users on 7/14. 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 8/135:01 pm
MIA
- BQN
2 stops54h 08m
United Airlines
Wed 8/1912:15 am
BQN
- MIA
1 stop9h 57m
United Airlines
Deal found 7/14![United Airlines logo]()
$805
This United deal was found by Cheapflights users on 7/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:29 pm
MIA
- CPX
2 stops21h 53m
Multiple Airlines
Sun 8/21:06 pm
CPX
- MIA
2 stops22h 06m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$1,054
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Fri 8/147:00 am
MIA
- MAZ
2 stops33h 11m
United Airlines
Tue 8/181:19 pm
MAZ
- MIA
3 stops25h 27m
United Airlines
Deal found 7/17![United Airlines logo]()
$1,083
This United deal was found by Cheapflights users on 7/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1411:30 am
MIA
- VQS
2 stops22h 25m
Multiple Airlines
Fri 8/214:55 pm
VQS
- MIA
2 stops23h 36m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$1,109
Last-minute flights from Key Largo to Puerto RicoDiscover last-minute flight deals from Key Largo to Puerto Rico. Data last updated July 19, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to Puerto Rico. Data last updated July 19, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 7/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/179:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Tue 7/217:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 7/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/189:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Tue 7/217:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$180
This Super.com deal was found by Cheapflights users on 7/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/219:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Thu 7/237:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$175
This Super.com deal was found by Cheapflights users on 7/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Fri 7/247:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/18![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 7/279:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Wed 7/297:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/15![Frontier logo]()
$181
This eDestinos deal was found by Cheapflights users on 7/14. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Thu 7/307:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 7/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Wed 7/297:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$183
This Frontier deal was found by Cheapflights users on 7/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Sat 8/85:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/15![Frontier logo]()
$173
This CheapOair deal was found by Cheapflights users on 7/14. 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 8/59:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Fri 8/77:10 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$177
This Frontier deal was found by Cheapflights users on 7/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Wed 8/127:10 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/19![Frontier logo]()
$176
This CheapOair deal was found by Cheapflights users on 7/15. 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.
Thu 8/139:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Sun 8/167:10 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/15![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 7/14. 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 8/209:48 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Mon 8/247:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 7/14![Frontier logo]()
$174
One-way flights from Key Largo to Puerto RicoSearch for one-way flight options from Key Largo to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated July 19, 2026.
Search for one-way flight options from Key Largo to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated July 19, 2026.
This Super.com deal was found by Cheapflights users on 7/16. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/29:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/16![Frontier logo]()
$88
This CheapOair deal was found by Cheapflights users on 7/15. 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 8/49:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/15![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 7/15. 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.
Tue 12/810:05 am
MIA
- SJU
Nonstop2h 46m
Frontier
Deal found 7/15![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 7/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:48 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/14![Frontier logo]()
$91
This eDestinos deal was found by Cheapflights users on 7/18. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/18![Frontier logo]()
$92
This eDestinos deal was found by Cheapflights users on 7/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/309:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/15![Frontier logo]()
$94
This CheapOair deal was found by Cheapflights users on 7/14. 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 8/59:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/14![Frontier logo]()
$95
This eDestinos deal was found by Cheapflights users on 7/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/269:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/15![Frontier logo]()
$99
This CheapOair deal was found by Cheapflights users on 7/15. 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.
Sat 7/259:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 7/15![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Tue 8/116:42 pm
MIA
- BQN
2 stops31h 28m
Frontier
Deal found 7/18![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 7/14. 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.
Wed 9/2310:03 am
MIA
- BQN
2 stops23h 54m
Frontier
Deal found 7/14![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 7/14. 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 8/15:54 pm
MIA
- BQN
2 stops32h 16m
Frontier
Deal found 7/14![Frontier logo]()
$233
Find flight deals from Key Largo to Puerto Rico
Keep the following information in mind while searching for Key Largo to Puerto Rico flight deals. Data was last updated July 19, 2026.
Round-trip from | $172 (Super.com) |
|---|---|
One-way from | $88 (Super.com) |
Popular in | June |
Cheapest in | April |
Average price | $309 |
Cheapflights Fare Finder
Customize your flight search to find flights from Key Largo to Puerto Rico 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 July 19, 2026.
Use the filters below to find and compare flights from Key Largo to Puerto Rico that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 9/2
7:10 am-12:20 pm
1 stop5h 10m
San Juan Luis Munoz Marin Intl
Wed 9/9
10:30 am-9:50 pm
2 stops11h 20m
$260
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 9/18
12:50 pm-11:50 pm
2 stops11h 00m
San Juan Luis Munoz Marin Intl
Sun 9/20
6:35 am-5:35 pm
2 stops11h 00m
$260
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Tue 9/1
12:05 pm-10:29 pm
1 stop10h 24m
San Juan Luis Munoz Marin Intl
Sat 9/12
5:59 pm-12:55 am
1 stop6h 56m
$263
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Sat 9/12
9:40 am-7:20 pm
2 stops9h 40m
San Juan Luis Munoz Marin Intl
Sat 9/19
5:05 am-4:15 pm
2 stops11h 10m
$266
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 10/22
12:30 pm-12:05 am
1 stop11h 35m
San Juan Luis Munoz Marin Intl
Mon 10/26
6:30 am-11:50 am
1 stop5h 20m
$278
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 9/23
7:30 am-7:00 pm
2 stops11h 30m
San Juan Luis Munoz Marin Intl
Fri 9/25
2:35 pm-10:05 pm
1 stop7h 30m
$278
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 9/16
9:15 am-9:05 pm
2 stops11h 50m
San Juan Luis Munoz Marin Intl
Tue 9/22
10:30 am-8:10 pm
2 stops9h 40m
$282
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Mon 8/17
4:50 pm-10:10 pm
1 stop5h 20m
San Juan Luis Munoz Marin Intl
Wed 8/19
8:20 am-8:10 pm
2 stops11h 50m
$293
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 8/27
4:50 pm-10:10 pm
1 stop5h 20m
San Juan Luis Munoz Marin Intl
Sun 8/30
6:00 am-5:35 pm
2 stops11h 35m
$300
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Tue 1/12
10:05 am-11:05 pm
2 stops12h 00m
San Juan Luis Munoz Marin Intl
Sat 1/30
7:50 am-11:55 am
1 stop5h 05m
$303
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Key Largo to Puerto Rico
Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from Key Largo with our price prediction graph.
MIA-SJU
MIA-CPX
MIA-BQN
MIA-MAZ
MIA-VQS
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 Key Largo to Puerto Rico
KE9-PR0
MIA-SJU
MIA-CPX
MIA-BQN
MIA-MAZ
What is the cheapest time of day to fly from KE9 to PR?
Find hourly flight availability from Key Largo to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 19, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 19% on flights from Key Largo to Puerto Rico by exploring options for tickets in the afternoon.
Weekly flight availability from Key Largo to Puerto Rico
Explore weekly flight availability from Key Largo to Puerto Rico. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 19, 2026.
The most flights from KE9 to PR0 are scheduled on a Friday (24 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (20 on average).
What is the cheapest day to fly from Key Largo to Puerto Rico?
Use this chart to determine the cheapest time to fly round-trip from Key Largo to Puerto Rico. Price data was last updated on July 11, 2026.
Travelers seeking maximum savings on their Key Largo to Puerto Rico flight should consider departing on Friday afternoons when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Puerto Rico
Get insights into the airlines that provide service to Puerto Rico. 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 Puerto Rico. Reviews last updated July 19, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andAmerican Airlines from Key Largo to Puerto Rico 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.
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Key Largo to Puerto Rico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Key Largo to Puerto Rico
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Puerto Rico by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Key Largo to Puerto Rico by cabin class
Find flights from Key Largo to Puerto Rico, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Key Largo and Puerto Rico flights
Browse other Key Largo and Puerto Rico flight options. Last updated on July 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Key Largo to Puerto Rico flights
Consider these flights traveling from Key Largo to Puerto Rico.
Top 5 airlines flying from Key Largo to Puerto Rico
Discover the top 5 airlines that operate flights from Key Largo to Puerto Rico. 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 July 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$80 | Average$210 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$108 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$125 | Average$317 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$189 | Average$282 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$230 | Average$456 | FlexibilityNo cancel fee | On-time71% |