$89+ 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 6/26. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Jun 22 — Jun 291
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 May 23, 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 May 23, 2026.
This Frontier deal was found by Cheapflights users on 5/22. 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 8/159:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Sun 8/167:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 5/22![Frontier logo]()
$173
This Frontier deal was found by Cheapflights users on 5/22. 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.
Thu 8/139:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Sun 8/167:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 5/22![Frontier logo]()
$178
This Frontier deal was found by Cheapflights users on 5/20. 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 10/269:28 pm
MIA
- SJU
Nonstop2h 48m
Frontier
Mon 11/28:24 pm
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 5/20![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 5/20. 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 6/159:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Wed 6/247:30 am
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 5/20![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 5/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/93:09 pm
MIA
- SJU
1 stop12h 48m
Frontier
Sat 6/135:30 am
SJU
- MIA
Nonstop2h 54m
Frontier
Deal found 5/18![Frontier logo]()
$192
This Frontier deal was found by Cheapflights users on 5/20. 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 10/109:28 pm
MIA
- SJU
Nonstop2h 48m
Frontier
Wed 10/146:00 am
SJU
- MIA
Nonstop2h 50m
Frontier
Deal found 5/20![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 5/22. 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 9/245:16 pm
MIA
- SJU
Nonstop2h 44m
Frontier
Wed 9/309:05 pm
SJU
- MIA
Nonstop2h 50m
Frontier
Deal found 5/22![Frontier logo]()
$198
This Frontier deal was found by Cheapflights users on 5/22. 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.
Thu 8/69:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Wed 8/127:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 5/22![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 5/23. 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 6/209:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Thu 6/257:30 am
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 5/23![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 5/20. 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.
Fri 9/255:16 pm
MIA
- SJU
Nonstop2h 44m
Frontier
Mon 10/59:05 pm
SJU
- MIA
Nonstop2h 50m
Frontier
Deal found 5/20![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Sun 8/167:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 5/19![Frontier logo]()
$206
This Frontier deal was found by Cheapflights users on 5/19. 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.
Thu 8/139:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Fri 8/147:30 am
SJU
- MIA
Nonstop2h 45m
Frontier
Deal found 5/19![Frontier logo]()
$207
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 May 23, 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 May 23, 2026.
This Southwest deal was found by Cheapflights users on 5/20. 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 9/97:10 am
MIA
- SJU
1 stop5h 10m
Southwest
Wed 9/238:20 am
SJU
- MIA
2 stops11h 50m
Southwest
Deal found 5/20![Southwest logo]()
$300
This Delta deal was found by Cheapflights users on 5/20. 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.
Wed 9/912:05 pm
MIA
- SJU
1 stop10h 18m
Delta
Sat 9/265:41 pm
SJU
- MIA
1 stop7h 13m
Delta
Deal found 5/20![Delta logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 7/49:33 pm
MIA
- MAZ
1 stop15h 11m
Multiple Airlines
Sat 7/111:19 pm
MAZ
- MIA
2 stops31h 46m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$498
This Delta deal was found by Cheapflights users on 5/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3010:40 am
MIA
- SJU
1 stop11h 49m
Delta
Mon 7/65:56 pm
SJU
- MIA
1 stop6h 55m
Delta
Deal found 5/19![Delta logo]()
$335
This Southwest deal was found by Cheapflights users on 5/21. 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 10/237:00 am
MIA
- SJU
1 stop9h 30m
Southwest
Sun 10/256:00 am
SJU
- MIA
2 stops10h 20m
Southwest
Deal found 5/21![Southwest logo]()
$336
This United Airlines deal was found by Cheapflights users on 5/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:40 pm
MIA
- BQN
1 stop26h 29m
United Airlines
Wed 7/1512:15 am
BQN
- MIA
1 stop9h 47m
United Airlines
Deal found 5/19![United Airlines logo]()
$692
This Southwest deal was found by Cheapflights users on 5/21. 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 7/304:00 pm
MIA
- SJU
2 stops9h 25m
Southwest
Tue 8/48:20 am
SJU
- MIA
2 stops11h 50m
Southwest
Deal found 5/21![Southwest logo]()
$438
This Southwest deal was found by Cheapflights users on 5/18. 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.
Fri 7/315:25 am
MIA
- SJU
1 stop5h 20m
Southwest
Mon 8/311:35 am
SJU
- MIA
2 stops11h 00m
Southwest
Deal found 5/18![Southwest logo]()
$475
This Southwest deal was found by Cheapflights users on 5/21. 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 8/76:20 am
MIA
- SJU
2 stops10h 35m
Southwest
Sun 8/166:35 am
SJU
- MIA
2 stops11h 25m
Southwest
Deal found 5/21![Southwest logo]()
$476
This Southwest deal was found by Cheapflights users on 5/21. 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 6/125:25 am
MIA
- SJU
1 stop5h 20m
Southwest
Tue 6/167:00 am
SJU
- MIA
2 stops8h 50m
Southwest
Deal found 5/21![Southwest logo]()
$476
This United Airlines deal was found by Cheapflights users on 5/20. 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 5/297:07 am
MIA
- BQN
1 stop16h 02m
United Airlines
Mon 6/112:15 am
BQN
- MIA
1 stop9h 47m
United Airlines
Deal found 5/20![United Airlines logo]()
$710
This Southwest deal was found by Cheapflights users on 5/18. 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.
Sun 7/55:35 am
MIA
- SJU
1 stop5h 10m
Southwest
Thu 7/911:35 am
SJU
- MIA
2 stops11h 00m
Southwest
Deal found 5/18![Southwest logo]()
$476
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 6/28:00 am
MIA
- VQS
2 stops10h 30m
Multiple Airlines
Sat 6/61:51 pm
VQS
- MIA
1 stop10h 44m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$775
This United Airlines deal was found by Cheapflights users on 5/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/911:12 am
MIA
- BQN
1 stop11h 57m
United Airlines
Thu 7/2312:15 am
BQN
- MIA
1 stop9h 47m
United Airlines
Deal found 5/19![United Airlines logo]()
$726
This Southwest deal was found by Cheapflights users on 5/18. 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.
Thu 6/113:05 pm
MIA
- SJU
1 stop9h 10m
Southwest
Wed 6/175:30 am
SJU
- MIA
2 stops10h 20m
Southwest
Deal found 5/18![Southwest logo]()
$490
This Kiwi.com deal was found by Cheapflights users on 5/22. 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 6/148:00 am
MIA
- CPX
2 stops9h 21m
Multiple Airlines
Fri 6/193:05 pm
CPX
- MIA
1 stop17h 19m
Multiple Airlines
Deal found 5/22![Multiple Airlines logo]()
$797
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/308:40 pm
MIA
- BQN
1 stop26h 29m
United Airlines
Mon 8/312:15 am
BQN
- MIA
2 stops34h 57m
United Airlines
Deal found 5/18![United Airlines logo]()
$748
This Southwest deal was found by Cheapflights users on 5/22. 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 7/81:45 pm
MIA
- SJU
2 stops10h 35m
Southwest
Mon 7/135:00 am
SJU
- MIA
2 stops9h 50m
Southwest
Deal found 5/22![Southwest logo]()
$492
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:07 am
MIA
- BQN
1 stop16h 02m
United Airlines
Mon 8/312:15 am
BQN
- MIA
2 stops34h 57m
United Airlines
Deal found 5/18![United Airlines logo]()
$798
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:07 am
MIA
- BQN
1 stop16h 02m
United Airlines
Fri 7/3112:15 am
BQN
- MIA
1 stop23h 07m
United Airlines
Deal found 5/18![United Airlines logo]()
$822
This United Airlines deal was found by Cheapflights users on 5/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/58:48 am
MIA
- BQN
1 stop14h 21m
United Airlines
Tue 8/1112:15 am
BQN
- MIA
1 stop14h 31m
United Airlines
Deal found 5/19![United Airlines logo]()
$826
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/257:07 am
MIA
- BQN
1 stop16h 02m
United Airlines
Thu 7/3012:15 am
BQN
- MIA
2 stops35h 20m
United Airlines
Deal found 5/18![United Airlines logo]()
$835
This United Airlines deal was found by Cheapflights users on 5/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:07 am
MIA
- BQN
1 stop16h 02m
United Airlines
Thu 7/2312:15 am
BQN
- MIA
1 stop9h 47m
United Airlines
Deal found 5/19![United Airlines logo]()
$841
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:00 am
MIA
- BQN
1 stop16h 09m
United Airlines
Tue 8/1812:15 am
BQN
- MIA
2 stops22h 19m
United Airlines
Deal found 5/18![United Airlines logo]()
$852
This United Airlines deal was found by Cheapflights users on 5/21. 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 7/46:30 am
MIA
- CPX
2 stops10h 51m
United Airlines
Tue 7/710:48 am
CPX
- MIA
2 stops12h 34m
United Airlines
Deal found 5/21![United Airlines logo]()
$1,558
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/308:40 pm
MIA
- CPX
2 stops20h 41m
United Airlines
Tue 7/710:48 am
CPX
- MIA
2 stops12h 34m
United Airlines
Deal found 5/18![United Airlines logo]()
$1,678
This United Airlines deal was found by Cheapflights users on 5/20. 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 7/46:30 am
MIA
- CPX
2 stops10h 51m
United Airlines
Fri 7/1010:48 am
CPX
- MIA
2 stops33h 45m
United Airlines
Deal found 5/20![United Airlines logo]()
$1,687
This United Airlines deal was found by Cheapflights users on 5/20. 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.
Sun 8/3011:30 am
MIA
- CPX
2 stops29h 51m
United Airlines
Wed 9/210:48 am
CPX
- MIA
2 stops12h 56m
United Airlines
Deal found 5/20![United Airlines logo]()
$1,708
This United Airlines deal was found by Cheapflights users on 5/20. 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 7/88:40 pm
MIA
- MAZ
2 stops19h 31m
United Airlines
Mon 7/131:19 pm
MAZ
- MIA
2 stops22h 16m
United Airlines
Deal found 5/20![United Airlines logo]()
$1,792
This United Airlines deal was found by Cheapflights users on 5/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:40 pm
MIA
- MAZ
2 stops19h 31m
United Airlines
Sun 6/71:19 pm
MAZ
- MIA
2 stops22h 16m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,806
Last-minute flights from Key Largo to Puerto RicoDiscover last-minute flight deals from Key Largo to Puerto Rico. Data last updated May 23, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to Puerto Rico. Data last updated May 23, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 5/18. 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 5/277:12 pm
MIA
- SJU
Nonstop2h 40m
Frontier
Sat 5/309:45 pm
SJU
- MIA
Nonstop2h 50m
Frontier
Deal found 5/18![Frontier logo]()
$216
This Frontier deal was found by Cheapflights users on 5/20. 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 5/277:12 pm
MIA
- SJU
Nonstop2h 40m
Frontier
Wed 6/33:12 pm
SJU
- MIA
Nonstop2h 55m
Frontier
Deal found 5/20![Frontier logo]()
$217
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2711:12 am
MIA
- BQN
1 stop11h 57m
United Airlines
Tue 6/912:15 am
BQN
- MIA
1 stop9h 47m
United Airlines
Deal found 5/18![United Airlines logo]()
$698
This Super.com deal was found by Cheapflights users on 5/18. 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.
Fri 5/292:50 pm
MIA
- SJU
Nonstop2h 36m
Frontier
Mon 6/16:41 pm
SJU
- MIA
Nonstop2h 58m
Frontier
Deal found 5/18![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 5/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/292:50 pm
MIA
- SJU
Nonstop2h 36m
Frontier
Wed 6/36:41 pm
SJU
- MIA
Nonstop2h 58m
Frontier
Deal found 5/18![Frontier logo]()
$213
This Super.com deal was found by Cheapflights users on 5/18. 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.
Mon 6/17:12 pm
MIA
- SJU
Nonstop2h 40m
Frontier
Fri 6/56:41 pm
SJU
- MIA
Nonstop2h 58m
Frontier
Deal found 5/18![Frontier logo]()
$206
This CheapOair deal was found by Cheapflights users on 5/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/93:09 pm
MIA
- SJU
1 stop12h 48m
Frontier
Sat 6/135:30 am
SJU
- MIA
Nonstop2h 54m
Frontier
Deal found 5/18![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 5/20. 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 6/103:09 pm
MIA
- SJU
1 stop12h 48m
Frontier
Sat 6/135:30 am
SJU
- MIA
Nonstop2h 54m
Frontier
Deal found 5/20![Frontier logo]()
$212
This Frontier deal was found by Cheapflights users on 5/19. 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.
Fri 6/129:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Wed 6/177:30 am
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 5/19![Frontier logo]()
$215
This Frontier deal was found by Cheapflights users on 5/22. 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.
Fri 6/129:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Sat 6/135:30 am
SJU
- MIA
Nonstop2h 54m
Frontier
Deal found 5/22![Frontier logo]()
$220
This Frontier deal was found by Cheapflights users on 5/20. 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 6/159:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Wed 6/247:30 am
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 5/20![Frontier logo]()
$190
This Frontier deal was found by Cheapflights users on 5/23. 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 6/209:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Thu 6/257:30 am
SJU
- MIA
Nonstop2h 51m
Frontier
Deal found 5/23![Frontier logo]()
$201
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 May 23, 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 May 23, 2026.
This Frontier deal was found by Cheapflights users on 5/23. 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.
Fri 6/269:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Deal found 5/23![Frontier logo]()
$89
This deal was found by Cheapflights users on 5/21. 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.
Mon 7/209:33 pm
MIA
- SJU
Nonstop2h 55m
Frontier
Deal found 5/21![Frontier logo]()
$96
This eDestinos deal was found by Cheapflights users on 5/19. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/292:50 pm
MIA
- SJU
Nonstop2h 36m
Frontier
Deal found 5/19![Frontier logo]()
$101
This Super.com deal was found by Cheapflights users on 5/18. 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.
Sat 7/49:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Deal found 5/18![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 5/19. 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.
Thu 9/175:16 pm
MIA
- SJU
Nonstop2h 44m
Frontier
Deal found 5/19![Frontier logo]()
$107
This Travelocity deal was found by Cheapflights users on 5/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/93:09 pm
MIA
- SJU
1 stop12h 48m
Frontier
Deal found 5/18![Frontier logo]()
$108
This Frontier deal was found by Cheapflights users on 5/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:45 am
MIA
- SJU
1 stop8h 40m
Frontier
Deal found 5/18![Frontier logo]()
$109
This Super.com deal was found by Cheapflights users on 5/22. 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 6/219:33 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Deal found 5/22![Frontier logo]()
$110
This Frontier deal was found by Cheapflights users on 5/22. 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 10/35:16 pm
MIA
- SJU
Nonstop2h 44m
Frontier
Deal found 5/22![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 7/49:33 pm
MIA
- MAZ
1 stop12h 09m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:05 am
MIA
- BQN
2 stops20h 57m
Frontier
Deal found 5/19![Frontier logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 5/18. 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.
Sun 7/59:33 pm
MIA
- MAZ
1 stop21h 10m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$224
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 May 23, 2026.
Round-trip from | $173 (Frontier) |
|---|---|
One-way from | $89 (Frontier) |
Popular in | December |
Cheapest in | April |
Average price | $256 |
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 May 23, 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
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 9/9
7:10 am-12:20 pm
1 stop5h 10m
San Juan Luis Munoz Marin Intl
Wed 9/23
8:20 am-8:10 pm
2 stops11h 50m
$300
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 9/9
12:05 pm-10:23 pm
1 stop10h 18m
San Juan Luis Munoz Marin Intl
Sat 9/26
5:41 pm-12:54 am
1 stop7h 13m
$325
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Tue 6/30
10:40 am-10:29 pm
1 stop11h 49m
San Juan Luis Munoz Marin Intl
Mon 7/6
5:56 pm-12:51 am
1 stop6h 55m
$335
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 10/23
7:00 am-4:30 pm
1 stop9h 30m
San Juan Luis Munoz Marin Intl
Sun 10/25
6:00 am-4:20 pm
2 stops10h 20m
$336
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 7/30
4:00 pm-1:25 am
2 stops9h 25m
San Juan Luis Munoz Marin Intl
Tue 8/4
8:20 am-8:10 pm
2 stops11h 50m
$438
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 7/31
5:25 am-10:45 am
1 stop5h 20m
San Juan Luis Munoz Marin Intl
Mon 8/3
11:35 am-10:35 pm
2 stops11h 00m
$475
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 8/7
6:20 am-4:55 pm
2 stops10h 35m
San Juan Luis Munoz Marin Intl
Sun 8/16
6:35 am-6:00 pm
2 stops11h 25m
$476
Quickest round-trip
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 6/12
5:25 am-10:45 am
1 stop5h 20m
San Juan Luis Munoz Marin Intl
Tue 6/16
7:00 am-3:50 pm
2 stops8h 50m
$476
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Sun 7/5
5:35 am-10:45 am
1 stop5h 10m
San Juan Luis Munoz Marin Intl
Thu 7/9
11:35 am-10:35 pm
2 stops11h 00m
$476
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 6/11
3:05 pm-12:15 am
1 stop9h 10m
San Juan Luis Munoz Marin Intl
Wed 6/17
5:30 am-3:50 pm
2 stops10h 20m
$490
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-MAZ
MIA-BQN
MIA-CPX
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-MAZ
MIA-BQN
MIA-CPX
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 May 23, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 23% 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 May 23, 2026.
The most flights from KE9 to PR0 are scheduled on a Friday (18 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 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 May 16, 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. Saturday at noon 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 May 23, 2026.
Peruse reviews from past customers who have flown with Delta,JetBlue, 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
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Spirit Airlines
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
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.
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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 May 23, 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 6 airlines flying from Key Largo to Puerto Rico
Discover the top 6 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 May 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$190 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$82 | Average$204 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$108 | Average$108 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$125 | Average$306 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$189 | Average$312 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$228 | Average$453 | FlexibilityNo cancel fee | On-time71% |