$65+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
May 1 — May 81
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 April 1, 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 April 1, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:24 pm
MIA
- SJU
Nonstop2h 34m
Spirit Airlines
Sun 4/267:00 am
SJU
- MIA
Nonstop2h 46m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/910:36 pm
MIA
- SJU
Nonstop2h 41m
Multiple Airlines
Mon 4/1311:03 am
SJU
- MIA
Nonstop2h 52m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$133
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 4/89:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Sat 4/1111:03 am
SJU
- MIA
Nonstop2h 52m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 3/319:25 pm
MIA
- SJU
Nonstop2h 33m
Multiple Airlines
Mon 4/66:07 pm
SJU
- MIA
Nonstop3h 03m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$136
This CheapOair deal was found by Cheapflights users on 3/31. 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.
Fri 4/1010:20 pm
MIA
- SJU
Nonstop2h 41m
Multiple Airlines
Sat 4/182:09 am
SJU
- MIA
1 stop12h 40m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$137
This Booking.com deal was found by Cheapflights users on 3/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2911:36 pm
MIA
- SJU
Nonstop2h 30m
Multiple Airlines
Wed 5/66:41 pm
SJU
- MIA
Nonstop2h 58m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$138
This Cheapflightsfares deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:12 am
MIA
- SJU
1 stop16h 42m
Spirit Airlines
Fri 4/1711:02 am
SJU
- MIA
1 stop11h 29m
Spirit Airlines
Deal found 3/30![Spirit Airlines logo]()
$139
This CheapOair deal was found by Cheapflights users on 3/31. 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 4/910:36 pm
MIA
- SJU
Nonstop2h 41m
Multiple Airlines
Sun 4/267:00 am
SJU
- MIA
Nonstop2h 46m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$141
This Mytrip deal was found by Cheapflights users on 3/29. 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.
Sat 4/49:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Sun 4/511:03 am
SJU
- MIA
Nonstop2h 52m
Spirit Airlines
Deal found 3/29![Spirit Airlines logo]()
$142
This Cheapflightsfares deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:00 am
MIA
- SJU
1 stop16h 10m
Spirit Airlines
Thu 4/303:21 am
SJU
- MIA
Nonstop2h 45m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$143
This eDestinos deal was found by Cheapflights users on 3/28. 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.
Mon 4/2712:26 pm
MIA
- BQN
2 stops37h 17m
Frontier
Sun 5/32:38 am
BQN
- MIA
2 stops44h 09m
Frontier
Deal found 3/28![Frontier logo]()
$303
This eDestinos deal was found by Cheapflights users on 3/26. 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.
Sat 4/255:05 am
MIA
- BQN
2 stops20h 38m
Frontier
Fri 5/12:38 am
BQN
- MIA
2 stops31h 34m
Frontier
Deal found 3/26![Frontier logo]()
$323
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 April 1, 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 April 1, 2026.
This Spirit deal was found by Cheapflights users on 3/29. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/212:09 pm
MIA
- SJU
1 stop9h 01m
Spirit Airlines
Sun 4/265:45 am
SJU
- MIA
1 stop18h 06m
Spirit Airlines
Deal found 3/29![Spirit Airlines logo]()
$160
This Delta deal was found by Cheapflights users on 3/30. 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 5/67:04 am
MIA
- SJU
1 stop9h 19m
Delta
Mon 5/116:15 am
SJU
- MIA
1 stop10h 31m
Delta
Deal found 3/30![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 3/29. 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 5/39:40 am
MIA
- SJU
2 stops11h 15m
Southwest
Wed 5/65:35 am
SJU
- MIA
2 stops15h 05m
Southwest
Deal found 3/29![Southwest logo]()
$338
This Mytrip deal was found by Cheapflights users on 3/26. 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.
Sat 4/252:09 pm
MIA
- CPX
2 stops17h 56m
Multiple Airlines
Sat 5/23:03 pm
CPX
- MIA
1 stop15h 03m
Multiple Airlines
Deal found 3/26![Multiple Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/92:20 pm
MIA
- BQN
1 stop8h 49m
United Airlines
Mon 5/1112:15 am
BQN
- MIA
1 stop8h 55m
United Airlines
Deal found 3/26![United Airlines logo]()
$551
This Delta deal was found by Cheapflights users on 3/28. 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 5/512:12 pm
MIA
- SJU
1 stop11h 01m
Delta
Sun 5/105:43 pm
SJU
- MIA
1 stop7h 04m
Delta
Deal found 3/28![Delta logo]()
$334
This Southwest deal was found by Cheapflights users on 3/31. 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 4/2912:10 pm
MIA
- SJU
2 stops11h 30m
Southwest
Wed 5/65:35 am
SJU
- MIA
2 stops15h 05m
Southwest
Deal found 3/31![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 3/26. 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 6/43:05 pm
MIA
- SJU
1 stop9h 10m
Southwest
Mon 6/85:00 am
SJU
- MIA
2 stops9h 10m
Southwest
Deal found 3/26![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 3/28. 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 5/151:45 pm
MIA
- SJU
2 stops9h 55m
Southwest
Fri 5/293:45 pm
SJU
- MIA
1 stop6h 15m
Southwest
Deal found 3/28![Southwest logo]()
$394
This Southwest deal was found by Cheapflights users on 3/28. 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 6/53:05 pm
MIA
- SJU
1 stop9h 10m
Southwest
Tue 6/96:00 am
SJU
- MIA
2 stops9h 50m
Southwest
Deal found 3/28![Southwest logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/152:23 pm
MIA
- CPX
1 stop19h 47m
Multiple Airlines
Fri 5/224:33 pm
CPX
- MIA
2 stops26h 25m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$533
This Southwest deal was found by Cheapflights users on 3/31. 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 5/151:45 pm
MIA
- SJU
2 stops9h 55m
Southwest
Fri 5/2210:00 am
SJU
- MIA
2 stops13h 00m
Southwest
Deal found 3/31![Southwest logo]()
$396
This United Airlines deal was found by Cheapflights users on 3/31. 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 5/712:15 pm
MIA
- BQN
1 stop10h 54m
United Airlines
Sat 5/912:15 am
BQN
- MIA
1 stop8h 55m
United Airlines
Deal found 3/31![United Airlines logo]()
$596
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/112:15 pm
MIA
- BQN
1 stop10h 54m
United Airlines
Sat 5/212:15 am
BQN
- MIA
1 stop10h 48m
United Airlines
Deal found 3/29![United Airlines logo]()
$605
This Southwest deal was found by Cheapflights users on 3/26. 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 5/1411:40 am
MIA
- SJU
2 stops11h 45m
Southwest
Mon 5/185:05 am
SJU
- MIA
2 stops11h 45m
Southwest
Deal found 3/26![Southwest logo]()
$446
This Southwest deal was found by Cheapflights users on 3/26. 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 5/1411:40 am
MIA
- SJU
2 stops11h 45m
Southwest
Tue 5/193:45 pm
SJU
- MIA
1 stop6h 10m
Southwest
Deal found 3/26![Southwest logo]()
$460
This United Airlines deal was found by Cheapflights users on 3/27. 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 4/266:05 am
MIA
- BQN
2 stops17h 04m
United Airlines
Sat 5/212:15 am
BQN
- MIA
1 stop8h 55m
United Airlines
Deal found 3/27![United Airlines logo]()
$689
This Southwest deal was found by Cheapflights users on 3/27. 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 5/181:45 pm
MIA
- SJU
2 stops9h 55m
Southwest
Thu 5/215:05 am
SJU
- MIA
2 stops10h 15m
Southwest
Deal found 3/27![Southwest logo]()
$460
This United Airlines deal was found by Cheapflights users on 3/29. 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 4/312:14 pm
MIA
- BQN
1 stop10h 55m
United Airlines
Sat 4/412:15 am
BQN
- MIA
1 stop9h 25m
United Airlines
Deal found 3/29![United Airlines logo]()
$701
This United Airlines deal was found by Cheapflights users on 3/30. 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 4/276:00 pm
MIA
- BQN
2 stops29h 09m
United Airlines
Sun 5/312:15 am
BQN
- MIA
1 stop8h 55m
United Airlines
Deal found 3/30![United Airlines logo]()
$730
This United Airlines deal was found by Cheapflights users on 3/28. 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 4/2512:14 pm
MIA
- BQN
1 stop10h 55m
United Airlines
Fri 5/112:15 am
BQN
- MIA
1 stop8h 55m
United Airlines
Deal found 3/28![United Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 3/30. 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 5/1010:50 am
MIA
- VQS
2 stops53h 03m
United Airlines
Wed 5/1311:44 am
VQS
- MIA
2 stops28h 32m
United Airlines
Deal found 3/30![United Airlines logo]()
$1,177
This United Airlines deal was found by Cheapflights users on 3/29. 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 4/306:10 pm
MIA
- CPX
2 stops22h 03m
United Airlines
Mon 5/410:30 am
CPX
- MIA
3 stops35h 39m
United Airlines
Deal found 3/29![United Airlines logo]()
$1,338
This United Airlines deal was found by Cheapflights users on 3/28. 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 6/56:30 am
MIA
- CPX
2 stops10h 51m
United Airlines
Sat 6/610:48 am
CPX
- MIA
2 stops12h 34m
United Airlines
Deal found 3/28![United Airlines logo]()
$1,586
This United Airlines deal was found by Cheapflights users on 3/29. 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 4/306:10 pm
MIA
- CPX
2 stops22h 03m
United Airlines
Tue 5/510:30 am
CPX
- MIA
2 stops12h 29m
United Airlines
Deal found 3/29![United Airlines logo]()
$1,596
This United Airlines deal was found by Cheapflights users on 3/28. 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 6/298:48 am
MIA
- CPX
2 stops32h 33m
United Airlines
Wed 7/810:48 am
CPX
- MIA
2 stops12h 34m
United Airlines
Deal found 3/28![United Airlines logo]()
$1,735
This United Airlines deal was found by Cheapflights users on 3/28. 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 6/294:53 pm
MIA
- CPX
2 stops24h 28m
United Airlines
Tue 7/710:48 am
CPX
- MIA
2 stops12h 34m
United Airlines
Deal found 3/28![United Airlines logo]()
$1,735
This United Airlines deal was found by Cheapflights users on 3/28. 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 6/56:30 am
MIA
- CPX
2 stops10h 51m
United Airlines
Sun 6/710:48 am
CPX
- MIA
3 stops35h 52m
United Airlines
Deal found 3/28![United Airlines logo]()
$1,788
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/106:10 pm
MIA
- MAZ
2 stops22h 01m
United Airlines
Wed 5/131:19 pm
MAZ
- MIA
2 stops33h 14m
United Airlines
Deal found 3/26![United Airlines logo]()
$1,842
This United Airlines deal was found by Cheapflights users on 3/27. 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 4/106:00 pm
MIA
- MAZ
2 stops22h 11m
United Airlines
Mon 4/131:19 pm
MAZ
- MIA
3 stops25h 08m
United Airlines
Deal found 3/27![United Airlines logo]()
$1,858
Last-minute flights from Key Largo to Puerto RicoDiscover last-minute flight deals from Key Largo to Puerto Rico. Data last updated April 1, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to Puerto Rico. Data last updated April 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 3/319:25 pm
MIA
- SJU
Nonstop2h 33m
Multiple Airlines
Mon 4/66:07 pm
SJU
- MIA
Nonstop3h 03m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$136
This Mytrip deal was found by Cheapflights users on 3/29. 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.
Sat 4/49:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Sun 4/511:03 am
SJU
- MIA
Nonstop2h 52m
Spirit Airlines
Deal found 3/29![Spirit Airlines logo]()
$142
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 4/89:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Sat 4/1111:03 am
SJU
- MIA
Nonstop2h 52m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/910:36 pm
MIA
- SJU
Nonstop2h 41m
Multiple Airlines
Mon 4/1311:03 am
SJU
- MIA
Nonstop2h 52m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$133
This CheapOair deal was found by Cheapflights users on 3/31. 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 4/910:36 pm
MIA
- SJU
Nonstop2h 41m
Multiple Airlines
Sun 4/267:00 am
SJU
- MIA
Nonstop2h 46m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$141
This CheapOair deal was found by Cheapflights users on 3/31. 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.
Fri 4/1010:20 pm
MIA
- SJU
Nonstop2h 41m
Multiple Airlines
Sat 4/182:09 am
SJU
- MIA
1 stop12h 40m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:12 am
MIA
- SJU
1 stop16h 42m
Spirit Airlines
Fri 4/1711:02 am
SJU
- MIA
1 stop11h 29m
Spirit Airlines
Deal found 3/30![Spirit Airlines logo]()
$139
This Cheapflightsfares deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:24 pm
MIA
- SJU
Nonstop2h 34m
Spirit Airlines
Sun 4/267:00 am
SJU
- MIA
Nonstop2h 46m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$132
This Cheapflightsfares deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:00 am
MIA
- SJU
1 stop16h 10m
Spirit Airlines
Thu 4/303:21 am
SJU
- MIA
Nonstop2h 45m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$143
This eDestinos deal was found by Cheapflights users on 3/26. 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.
Sat 4/255:05 am
MIA
- BQN
2 stops20h 38m
Frontier
Fri 5/12:38 am
BQN
- MIA
2 stops31h 34m
Frontier
Deal found 3/26![Frontier logo]()
$323
This eDestinos deal was found by Cheapflights users on 3/28. 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.
Mon 4/2712:26 pm
MIA
- BQN
2 stops37h 17m
Frontier
Sun 5/32:38 am
BQN
- MIA
2 stops44h 09m
Frontier
Deal found 3/28![Frontier logo]()
$303
This Booking.com deal was found by Cheapflights users on 3/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2911:36 pm
MIA
- SJU
Nonstop2h 30m
Multiple Airlines
Wed 5/66:41 pm
SJU
- MIA
Nonstop2h 58m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$138
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 April 1, 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 April 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/2911:36 pm
MIA
- SJU
Nonstop2h 30m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$65
This eDestinos deal was found by Cheapflights users on 3/31. 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.
Sat 4/46:51 pm
MIA
- SJU
Nonstop2h 42m
Frontier
Deal found 3/31![Frontier logo]()
$66
This eDestinos deal was found by Cheapflights users on 3/29. 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.
Mon 4/610:20 pm
MIA
- SJU
Nonstop2h 41m
Frontier
Deal found 3/29![Frontier logo]()
$68
This Mytrip deal was found by Cheapflights users on 3/28. 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.
Thu 4/1612:53 pm
MIA
- SJU
1 stop6h 21m
Spirit Airlines
Deal found 3/28![Spirit Airlines logo]()
$69
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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.
Tue 4/79:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$73
This Spirit deal was found by Cheapflights users on 3/30. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/89:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Deal found 3/30![Spirit Airlines logo]()
$74
This eDestinos deal was found by Cheapflights users on 3/29. 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.
Sat 4/49:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Deal found 3/29![Spirit Airlines logo]()
$75
This Super.com deal was found by Cheapflights users on 3/27. 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 5/62:50 pm
MIA
- SJU
Nonstop2h 36m
Frontier
Deal found 3/27![Frontier logo]()
$77
This Frontier deal was found by Cheapflights users on 3/29. 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 5/132:50 pm
MIA
- SJU
Nonstop2h 36m
Frontier
Deal found 3/29![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/1211:23 am
MIA
- BQN
2 stops14h 39m
Frontier
Deal found 3/31![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/2012:53 pm
MIA
- BQN
2 stops12h 50m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/168:10 am
MIA
- BQN
2 stops17h 52m
Frontier
Deal found 3/29![Frontier logo]()
$164
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 April 1, 2026.
Round-trip from | $132 (Cheapflightsfares) |
|---|---|
One-way from | $65 (Kiwi.com) |
Popular in | December |
Cheapest in | April |
Average price | $198 |
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 April 1, 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
Tue 4/21
2:09 pm-11:10 pm
1 stop9h 01m
San Juan Luis Munoz Marin Intl
Sun 4/26
5:45 am-11:51 pm
1 stop18h 06m
$160
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 5/6
7:04 am-4:23 pm
1 stop9h 19m
San Juan Luis Munoz Marin Intl
Mon 5/11
6:15 am-4:46 pm
1 stop10h 31m
$317
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Tue 5/5
12:12 pm-11:13 pm
1 stop11h 01m
San Juan Luis Munoz Marin Intl
Sun 5/10
5:43 pm-12:47 am
1 stop7h 04m
$334
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Sun 5/3
9:40 am-8:55 pm
2 stops11h 15m
San Juan Luis Munoz Marin Intl
Wed 5/6
5:35 am-8:40 pm
2 stops15h 05m
$338
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 4/29
12:10 pm-11:40 pm
2 stops11h 30m
San Juan Luis Munoz Marin Intl
Wed 5/6
5:35 am-8:40 pm
2 stops15h 05m
$353
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 6/4
3:05 pm-12:15 am
1 stop9h 10m
San Juan Luis Munoz Marin Intl
Mon 6/8
5:00 am-2:10 pm
2 stops9h 10m
$353
Quickest round-trip
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 5/15
1:45 pm-11:40 pm
2 stops9h 55m
San Juan Luis Munoz Marin Intl
Fri 5/29
3:45 pm-10:00 pm
1 stop6h 15m
$394
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 6/5
3:05 pm-12:15 am
1 stop9h 10m
San Juan Luis Munoz Marin Intl
Tue 6/9
6:00 am-3:50 pm
2 stops9h 50m
$394
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Fri 5/15
1:45 pm-11:40 pm
2 stops9h 55m
San Juan Luis Munoz Marin Intl
Fri 5/22
10:00 am-11:00 pm
2 stops13h 00m
$396
MiamiCulebra
MIA - CPX
MIACPX
Miami
Sat 4/25
2:09 pm-8:05 am
2 stops17h 56m
Culebra
Sat 5/2
3:03 pm-6:06 am
1 stop15h 03m
$399
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-VQS
MIA-MAZ
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-VQS
What is the cheapest month to book a flight from Key Largo to Puerto Rico?
Currently, May is the cheapest month in which you can book a flight from Key Largo to Puerto Rico (average of $83). Flying from Key Largo to Puerto Rico in September is currently the most expensive (average of $130). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from 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 April 1, 2026.
Unlike at noon, 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.
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 March 28, 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. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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 April 1, 2026.
The most flights from KE9 to PR0 are scheduled on a Tuesday (23 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (13 on average).
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 April 1, 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
Comfort
7.9
Entertainment
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Overall
7.9
Crew
8.5
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 April 1, 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 April 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$72 | Average$183 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$80 | Average$203 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$100 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$108 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$189 | Average$314 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$225 | Average$442 | FlexibilityNo cancel fee | On-time71% |