$80+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Sep 4 — Sep 111
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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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 August 5, 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 August 5, 2026.
This Frontier deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” 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 9/2411:30 pm -
Nonstop2h 43m
Sun 9/273:08 am -
Nonstop2h 41m
Deal found 8/5![Frontier logo]()
$161
This CheapOair deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/289:48 pm -
Nonstop2h 55m
Sun 8/307:30 am -
Nonstop2h 45m
Deal found 8/3![Frontier logo]()
$162
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:33 pm -
Nonstop2h 55m
Tue 8/187:30 am -
Nonstop2h 45m
Deal found 7/31![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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 9/295:32 am -
1 stop8h 08m
Sat 10/33:39 pm -
Nonstop2h 44m
Deal found 8/4![Frontier logo]()
$164
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:33 pm -
Nonstop2h 55m
Fri 8/217:30 am -
Nonstop2h 45m
Deal found 7/31![Frontier logo]()
$165
This Super.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/99:33 pm -
Nonstop2h 55m
Thu 8/137:10 am -
Nonstop2h 45m
Deal found 8/3![Frontier logo]()
$166
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:32 am -
1 stop9h 47m
Wed 10/146:00 am -
Nonstop2h 50m
Deal found 7/31![Frontier logo]()
$167
This Frontier deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/235:32 am -
1 stop9h 47m
Sun 9/273:08 am -
Nonstop2h 41m
Deal found 8/1![Frontier logo]()
$168
This Booking.com deal was found by Cheapflights users on 7/31. 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.
Tue 9/1511:30 pm -
Nonstop2h 43m
Mon 9/2112:59 am -
1 stop18h 46m
Deal found 7/31![Frontier logo]()
$169
This Frontier deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/129:33 pm -
Nonstop2h 55m
Sat 8/155:30 am -
Nonstop2h 45m
Deal found 8/3![Frontier logo]()
$170
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:33 pm -
Nonstop2h 55m
Sat 8/155:30 am -
Nonstop2h 45m
Deal found 7/31![Frontier logo]()
$171
This eDestinos deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 8/109:33 pm -
Nonstop2h 55m
Thu 8/137:10 am -
Nonstop2h 45m
Deal found 8/1![Frontier logo]()
$172
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 August 5, 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 August 5, 2026.
This Southwest deal was found by Cheapflights users on 7/31. 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 8/284:50 pm -
1 stop7h 00m
Wed 9/26:00 am -
1 stop7h 35m
Deal found 7/31![Southwest logo]()
$216
This Southwest deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:15 am -
2 stops9h 50m
Thu 9/175:30 am -
1 stop10h 55m
Deal found 8/1![Southwest logo]()
$216
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Mon 10/261:21 pm -
1 stop9h 36m
Thu 10/2912:09 am -
1 stop9h 59m
Deal found 7/31![United Airlines logo]()
$517
This Southwest deal was found by Cheapflights users on 7/31. 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.
Tue 9/159:15 am -
2 stops9h 50m
Tue 9/228:20 am -
2 stops11h 55m
Deal found 7/31![Southwest logo]()
$238
This Southwest deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:45 am -
1 stop10h 20m
Thu 9/2410:00 am -
2 stops11h 05m
Deal found 8/1![Southwest logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/189:48 pm -
1 stop16h 51m
Sat 8/2210:48 am -
2 stops12h 53m
Deal found 8/3![Multiple Airlines logo]()
$602
This Southwest deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:15 am -
2 stops9h 50m
Wed 9/235:15 am -
1 stop6h 35m
Deal found 8/4![Southwest logo]()
$238
This Southwest deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 10/2912:30 pm -
1 stop11h 35m
Tue 11/36:40 am -
1 stop8h 10m
Deal found 8/2![Southwest logo]()
$250
This Southwest deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:30 am -
2 stops11h 35m
Sat 8/295:55 am -
1 stop10h 20m
Deal found 8/2![Southwest logo]()
$281
This Southwest deal was found by Cheapflights users on 7/31. 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 9/2512:50 pm -
2 stops11h 05m
Sun 9/276:00 am -
2 stops11h 35m
Deal found 7/31![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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 9/27:30 am -
2 stops11h 30m
Wed 9/98:20 am -
2 stops11h 55m
Deal found 8/4![Southwest logo]()
$292
This Southwest deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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 -
2 stops11h 05m
Tue 9/2210:30 am -
2 stops11h 25m
Deal found 8/4![Southwest logo]()
$293
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 8/287:00 am -
1 stop16h 09m
Sat 8/2912:15 am -
1 stop9h 57m
Deal found 7/31![United Airlines logo]()
$682
This Southwest deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:55 am -
2 stops13h 20m
Tue 9/85:15 am -
1 stop6h 35m
Deal found 8/1![Southwest logo]()
$305
This United deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/1111:30 am -
2 stops26h 00m
Wed 9/164:55 pm -
2 stops17h 17m
Deal found 8/1![Multiple Airlines logo]()
$729
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 9/911:26 am -
1 stop11h 43m
Sun 9/1312:15 am -
1 stop9h 57m
Deal found 8/3![United Airlines logo]()
$686
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 8/287:00 am -
1 stop16h 09m
Mon 8/3112:15 am -
1 stop16h 16m
Deal found 7/31![United Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 8/287:00 am -
1 stop16h 09m
Tue 9/112:15 am -
1 stop18h 37m
Deal found 7/31![United Airlines logo]()
$731
This United deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” 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 8/2011:30 am -
2 stops23h 56m
Tue 8/2511:51 am -
3 stops31h 01m
Deal found 8/5![Multiple Airlines logo]()
$1,253
This United Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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 9/41:44 pm -
2 stops26h 27m
Fri 9/111:19 pm -
2 stops34h 25m
Deal found 8/4![United Airlines logo]()
$969
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 8/281:44 pm -
2 stops26h 27m
Tue 9/11:19 pm -
2 stops21h 52m
Deal found 7/31![United Airlines logo]()
$1,131
This United Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 8/2411:30 am -
2 stops29h 51m
Fri 8/2810:48 am -
2 stops12h 56m
Deal found 8/2![United Airlines logo]()
$1,202
This United Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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 8/197:59 pm -
2 stops20h 12m
Sun 8/231:19 pm -
2 stops34h 25m
Deal found 8/4![United Airlines logo]()
$1,577
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Sat 8/295:37 pm -
2 stops22h 34m
Wed 9/21:19 pm -
2 stops22h 35m
Deal found 7/31![United Airlines logo]()
$1,602
This United Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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 9/211:30 am -
2 stops52h 41m
Tue 9/81:19 pm -
2 stops22h 35m
Deal found 8/4![United Airlines logo]()
$1,669
This United Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 9/311:30 am -
2 stops29h 51m
Sun 9/610:48 am -
2 stops11h 46m
Deal found 8/2![United Airlines logo]()
$1,684
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/96:30 am -
2 stops10h 51m
Wed 8/1210:48 am -
2 stops12h 56m
Deal found 8/3![United Airlines logo]()
$1,727
This United Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 8/255:01 pm -
2 stops25h 29m
Sat 8/2911:51 am -
2 stops11h 53m
Deal found 8/2![United Airlines logo]()
$1,853
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/101:10 pm -
2 stops29h 20m
Wed 8/127:30 am -
2 stops15h 04m
Deal found 8/3![United Airlines logo]()
$1,858
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/106:30 am -
2 stops12h 00m
Thu 8/137:30 am -
2 stops15h 04m
Deal found 8/3![United Airlines logo]()
$1,877
Last-minute flights from Key Largo to Puerto RicoDiscover last-minute flight deals from Key Largo to Puerto Rico. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to Puerto Rico. Data last updated August 5, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/99:33 pm -
Nonstop2h 55m
Thu 8/137:10 am -
Nonstop2h 45m
Deal found 8/3![Frontier logo]()
$166
This eDestinos deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 8/109:33 pm -
Nonstop2h 55m
Thu 8/137:10 am -
Nonstop2h 45m
Deal found 8/1![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:33 pm -
Nonstop2h 55m
Sat 8/155:30 am -
Nonstop2h 45m
Deal found 7/31![Frontier logo]()
$171
This Frontier deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/129:33 pm -
Nonstop2h 55m
Sat 8/155:30 am -
Nonstop2h 45m
Deal found 8/3![Frontier logo]()
$170
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:33 pm -
Nonstop2h 55m
Wed 8/197:30 am -
Nonstop2h 45m
Deal found 7/31![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:33 pm -
Nonstop2h 55m
Fri 8/217:30 am -
Nonstop2h 45m
Deal found 7/31![Frontier logo]()
$165
This FlightHub deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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.
Mon 8/249:48 pm -
Nonstop2h 55m
Sat 8/297:30 am -
Nonstop2h 45m
Deal found 8/4![Frontier logo]()
$167
This CheapOair deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/289:48 pm -
Nonstop2h 55m
Sun 8/307:30 am -
Nonstop2h 45m
Deal found 8/3![Frontier logo]()
$162
This Booking.com deal was found by Cheapflights users on 7/31. 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.
Tue 9/1511:30 pm -
Nonstop2h 43m
Mon 9/2112:59 am -
1 stop18h 46m
Deal found 7/31![Frontier logo]()
$169
This Frontier deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/235:32 am -
1 stop9h 47m
Sun 9/273:08 am -
Nonstop2h 41m
Deal found 8/1![Frontier logo]()
$168
This Frontier deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” 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 9/2411:30 pm -
Nonstop2h 43m
Sun 9/273:08 am -
Nonstop2h 41m
Deal found 8/5![Frontier logo]()
$161
This Frontier deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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 9/295:32 am -
1 stop8h 08m
Sat 10/33:39 pm -
Nonstop2h 44m
Deal found 8/4![Frontier logo]()
$164
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 August 5, 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 August 5, 2026.
This Super.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 10/179:28 pm -
Nonstop2h 48m
Deal found 8/3![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 9/59:48 pm -
Nonstop2h 55m
Deal found 8/1![Frontier logo]()
$81
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:45 am -
Nonstop2h 42m
Deal found 7/31![Frontier logo]()
$82
This Frontier deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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 8/179:33 pm -
Nonstop2h 55m
Deal found 8/1![Frontier logo]()
$84
This Super.com deal was found by Cheapflights users on 7/31. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:33 pm -
Nonstop2h 55m
Deal found 7/31![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” 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.
Thu 8/139:33 pm -
Nonstop2h 55m
Deal found 8/1![Frontier logo]()
$88
This CheapOair deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/119:33 pm -
Nonstop2h 55m
Deal found 8/3![Frontier logo]()
$91
This eDestinos deal was found by Cheapflights users on 7/31. 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 8/89:33 pm -
Nonstop2h 55m
Deal found 7/31![Frontier logo]()
$92
This Super.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” 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.
Thu 9/39:48 pm -
Nonstop2h 55m
Deal found 8/4![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:28 pm -
Nonstop2h 48m
Deal found 7/31![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/1811:10 am -
2 stops15h 00m
Deal found 8/3![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” 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 11/17:17 pm -
2 stops38h 40m
Deal found 8/2![Frontier logo]()
$212
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 August 5, 2026.
Round-trip from | $160 (Super.com) |
|---|---|
One-way from | $80 (Super.com) |
Popular in | June |
Cheapest in | April |
Average price | $264 |
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 August 5, 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 Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Fri 8/28
4:50 pm-11:50 pm
1 stop7h 00m
San Juan Luis Munoz Marin Intl
Wed 9/2
6:00 am-1:35 pm
1 stop7h 35m
$216
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Tue 9/15
9:15 am-7:05 pm
2 stops9h 50m
San Juan Luis Munoz Marin Intl
Thu 9/17
5:30 am-4:25 pm
1 stop10h 55m
$216
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Tue 9/15
9:15 am-7:05 pm
2 stops9h 50m
San Juan Luis Munoz Marin Intl
Tue 9/22
8:20 am-8:15 pm
2 stops11h 55m
$238
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Sun 9/20
6:45 am-5:05 pm
1 stop10h 20m
San Juan Luis Munoz Marin Intl
Thu 9/24
10:00 am-9:05 pm
2 stops11h 05m
$238
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Tue 9/8
9:15 am-7:05 pm
2 stops9h 50m
San Juan Luis Munoz Marin Intl
Wed 9/23
5:15 am-11:50 am
1 stop6h 35m
$238
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Thu 10/29
12:30 pm-12:05 am
1 stop11h 35m
San Juan Luis Munoz Marin Intl
Tue 11/3
6:40 am-1:50 pm
1 stop8h 10m
$250
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Sat 8/22
6:30 am-6:05 pm
2 stops11h 35m
San Juan Luis Munoz Marin Intl
Sat 8/29
5:55 am-4:15 pm
1 stop10h 20m
$281
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Fri 9/25
12:50 pm-11:55 pm
2 stops11h 05m
San Juan Luis Munoz Marin Intl
Sun 9/27
6:00 am-5:35 pm
2 stops11h 35m
$289
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Wed 9/2
7:30 am-7:00 pm
2 stops11h 30m
San Juan Luis Munoz Marin Intl
Wed 9/9
8:20 am-8:15 pm
2 stops11h 55m
$292
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Fri 9/18
12:50 pm-11:55 pm
2 stops11h 05m
San Juan Luis Munoz Marin Intl
Tue 9/22
10:30 am-9:55 pm
2 stops11h 25m
$293
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-BQN
MIA-CPX
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-BQN
MIA-CPX
MIA-VQS
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 August 5, 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 evening.
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 August 1, 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 August 5, 2026.
Peruse reviews from past customers who have flown with Delta,American Airlines, andJetBlue 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.
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Overall
7.8
Boarding
8.1
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
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Complete your trip
Complete your trip to Puerto Rico by adding a car rental and/or hotel reservation to your travel itinerary.
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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 August 5, 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 August 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$80 | Average$209 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$100 | Average$296 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$108 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$200 | Average$298 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$230 | Average$488 | FlexibilityNo cancel fee | On-time71% |