$68+ Cheap flights from Key Largo, FL to Puerto Rico
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Oct 10 — Oct 171
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Key Largo to Puerto Rico
Cheapest
Best
Last-minute
One-way
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 September 10, 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 September 10, 2026.
This Super.com deal was found by Cheapflights users on 9/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:30 pm -
Nonstop2h 43m
Sat 10/33:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:30 pm -
Nonstop2h 43m
Sat 9/263:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$127
This Priceline deal was found by Cheapflights users on 9/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:30 pm -
Nonstop2h 43m
Mon 10/53:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$128
This CheapOair deal was found by Cheapflights users on 9/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:30 pm -
Nonstop2h 43m
Thu 10/811:54 am -
Nonstop2h 51m
Deal found 9/5![Frontier logo]()
$130
This FlightHub deal was found by Cheapflights users on 9/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:30 pm -
Nonstop2h 43m
Tue 10/63:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$131
This Frontier deal was found by Cheapflights users on 9/4. 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.
Wed 10/711:30 pm -
Nonstop2h 43m
Thu 10/811:54 am -
Nonstop2h 51m
Deal found 9/4![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:10 am -
Nonstop2h 43m
Sun 10/43:08 am -
Nonstop2h 41m
Deal found 9/8![Frontier logo]()
$134
This Super.com deal was found by Cheapflights users on 9/4. 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.
Fri 10/98:10 am -
Nonstop2h 39m
Mon 10/1211:54 am -
Nonstop2h 51m
Deal found 9/4![Frontier logo]()
$136
This Super.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:29 pm -
Nonstop2h 40m
Wed 10/143:04 am -
Nonstop2h 51m
Deal found 9/9![Frontier logo]()
$137
This Frontier deal was found by Cheapflights users on 9/5. 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.
Fri 10/168:10 am -
Nonstop2h 39m
Mon 10/193:04 am -
Nonstop2h 51m
Deal found 9/5![Frontier logo]()
$138
This Frontier deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/47:55 pm -
Nonstop2h 43m
Wed 11/184:52 pm -
Nonstop2h 58m
Deal found 9/6![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:10 am -
1 stop4h 34m
Mon 9/287:35 am -
1 stop22h 14m
Deal found 9/9![Multiple Airlines logo]()
$301
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 September 10, 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 September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:30 pm -
2 stops11h 50m
Sun 10/46:35 am -
1 stop5h 20m
Deal found 9/8![Southwest logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:10 am -
1 stop4h 34m
Mon 9/287:35 am -
1 stop22h 14m
Deal found 9/9![Multiple Airlines logo]()
$301
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 11/31:22 pm -
1 stop9h 35m
Mon 12/71:09 am -
1 stop9h 55m
Deal found 9/7![United Airlines logo]()
$446
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:00 am -
1 stop9h 40m
Thu 9/2411:35 am -
1 stop10h 35m
Deal found 9/8![Southwest logo]()
$290
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 10/176:45 am -
2 stops12h 20m
Tue 10/206:35 am -
2 stops10h 55m
Deal found 9/7![Southwest logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 9/225:32 am -
2 stops10h 39m
Sat 9/261:19 pm -
1 stop16h 30m
Deal found 9/7![Multiple Airlines logo]()
$365
This Southwest deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:50 pm -
1 stop7h 05m
Wed 9/168:20 am -
2 stops11h 55m
Deal found 9/9![Southwest logo]()
$320
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:30 pm -
1 stop9h 39m
Mon 10/1212:15 am -
1 stop9h 57m
Deal found 9/6![United Airlines logo]()
$446
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 9/146:20 am -
2 stops10h 35m
Tue 9/1510:30 am -
2 stops11h 25m
Deal found 9/7![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:30 am -
2 stops11h 40m
Mon 9/285:00 am -
2 stops11h 25m
Deal found 9/6![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 9/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/512:30 pm -
2 stops11h 55m
Wed 10/710:00 am -
2 stops11h 40m
Deal found 9/5![Southwest logo]()
$344
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/261:30 pm -
1 stop9h 39m
Sun 9/2712:15 am -
1 stop9h 57m
Deal found 9/8![United Airlines logo]()
$517
This United Airlines deal was found by Cheapflights users on 9/5. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:52 pm -
1 stop9h 05m
Sat 10/311:09 am -
1 stop9h 59m
Deal found 9/5![United Airlines logo]()
$517
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:20 am -
2 stops10h 35m
Mon 9/285:00 am -
2 stops11h 25m
Deal found 9/8![Southwest logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/128:46 pm -
2 stops15h 44m
Sun 11/155:59 pm -
1 stop14h 53m
Deal found 9/9![Multiple Airlines logo]()
$624
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 11/111:52 pm -
1 stop9h 05m
Fri 11/131:09 am -
1 stop9h 59m
Deal found 9/7![United Airlines logo]()
$517
This Southwest deal was found by Cheapflights users on 9/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:50 pm -
2 stops10h 20m
Sun 9/276:35 am -
1 stop4h 55m
Deal found 9/5![Southwest logo]()
$360
This Southwest deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/215:55 am -
1 stop13h 20m
Tue 11/246:35 am -
2 stops12h 35m
Deal found 9/6![Southwest logo]()
$364
This Southwest deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3011:45 am -
2 stops11h 25m
Sat 10/315:45 am -
2 stops11h 55m
Deal found 9/9![Southwest logo]()
$368
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 9/1211:26 am -
1 stop11h 43m
Sun 9/2012:15 am -
1 stop9h 57m
Deal found 9/7![United Airlines logo]()
$596
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:45 am -
1 stop14h 24m
Sat 9/2612:15 am -
1 stop9h 57m
Deal found 9/7![United Airlines logo]()
$596
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:30 pm -
1 stop9h 39m
Sun 9/2712:15 am -
1 stop11h 58m
Deal found 9/8![United Airlines logo]()
$596
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:00 pm -
2 stops30h 09m
Sun 10/412:15 am -
1 stop9h 57m
Deal found 9/7![United Airlines logo]()
$640
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:45 am -
1 stop14h 24m
Wed 9/1612:15 am -
1 stop9h 57m
Deal found 9/9![United Airlines logo]()
$667
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 12/11:00 pm -
1 stop9h 57m
Fri 12/181:09 am -
1 stop9h 55m
Deal found 9/6![United Airlines logo]()
$668
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:59 pm -
2 stops20h 12m
Mon 9/281:19 pm -
2 stops20h 53m
Deal found 9/9![United Airlines logo]()
$1,201
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Sun 9/137:59 pm -
2 stops21h 22m
Wed 9/1610:48 am -
2 stops13h 04m
Deal found 9/4![United Airlines logo]()
$1,226
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:30 am -
2 stops28h 41m
Sat 9/261:19 pm -
2 stops26h 35m
Deal found 9/7![United Airlines logo]()
$1,482
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 9/205:37 pm -
2 stops22h 34m
Tue 9/221:19 pm -
2 stops34h 33m
Deal found 9/7![United Airlines logo]()
$1,617
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Sun 9/137:59 pm -
2 stops20h 12m
Wed 9/161:19 pm -
2 stops20h 53m
Deal found 9/4![United Airlines logo]()
$1,617
Last-minute flights from Key Largo to Puerto RicoDiscover last-minute flight deals from Key Largo to Puerto Rico. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to Puerto Rico. Data last updated September 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 9/2211:30 pm -
1 stop10h 12m
Sat 9/261:19 pm -
1 stop5h 04m
Deal found 9/7![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:10 am -
1 stop4h 34m
Mon 9/287:35 am -
1 stop22h 14m
Deal found 9/9![Multiple Airlines logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:30 pm -
Nonstop2h 43m
Sat 9/263:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 9/5. 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.
Mon 9/288:10 am -
Nonstop2h 43m
Sat 10/103:04 am -
Nonstop2h 51m
Deal found 9/5![Frontier logo]()
$139
This Super.com deal was found by Cheapflights users on 9/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:30 pm -
Nonstop2h 43m
Sat 10/33:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$126
This Priceline deal was found by Cheapflights users on 9/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:30 pm -
Nonstop2h 43m
Mon 10/53:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$128
This Justfly.com deal was found by Cheapflights users on 9/5. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:30 pm -
Nonstop2h 43m
Sun 10/43:08 am -
Nonstop2h 41m
Deal found 9/5![Frontier logo]()
$131
This Justfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:43 pm -
2 stops36h 14m
Tue 10/1310:52 am -
2 stops10h 37m
Deal found 9/8![Frontier logo]()
$359
This Frontier deal was found by Cheapflights users on 9/4. 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.
Wed 10/711:30 pm -
Nonstop2h 43m
Thu 10/811:54 am -
Nonstop2h 51m
Deal found 9/4![Frontier logo]()
$133
This Super.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:29 pm -
Nonstop2h 40m
Wed 10/143:04 am -
Nonstop2h 51m
Deal found 9/9![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 9/4. 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.
Fri 10/98:10 am -
Nonstop2h 39m
Mon 10/1211:54 am -
Nonstop2h 51m
Deal found 9/4![Frontier logo]()
$136
This Frontier deal was found by Cheapflights users on 9/5. 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.
Fri 10/168:10 am -
Nonstop2h 39m
Sun 10/183:04 am -
Nonstop2h 51m
Deal found 9/5![Frontier 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 September 10, 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 September 10, 2026.
This Super.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/211:30 pm -
Nonstop2h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$68
This Frontier deal was found by Cheapflights users on 9/5. 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.
Sun 10/1811:29 pm -
Nonstop2h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$69
This CheapOair deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:30 pm -
Nonstop2h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$70
This FlightHub deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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.
Tue 10/611:30 pm -
Nonstop2h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$73
This Super.com deal was found by Cheapflights users on 9/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:57 am -
Nonstop2h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$74
This Super.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:57 am -
Nonstop2h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$75
This Priceline deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:05 am -
Nonstop2h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$77
This CheapOair deal was found by Cheapflights users on 9/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/278:10 am -
Nonstop2h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$81
This eDestinos deal was found by Cheapflights users on 9/5. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:40 am -
Nonstop2h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/65:32 am -
2 stops28h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:43 pm -
2 stops36h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:59 pm -
2 stops18h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$201
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 September 10, 2026.
Round-trip from | $126 (Super.com) |
|---|---|
One-way from | $68 (Super.com) |
Popular in | June |
Cheapest in | April |
Average price | $249 |
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 7,457,451 searches. Data last updated September 10, 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
Thu 10/1
6:10 pm-12:20 am
1 stop6h 10m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$108
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Sun 10/11
6:20 am-5:00 pm
2 stops10h 40m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Tue 10/20
12:05 pm-9:55 pm
2 stops9h 50m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Wed 11/4
9:10 am-9:50 pm
2 stops11h 40m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Fri 11/6
11:45 am-12:55 am
2 stops12h 10m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Fri 11/13
5:35 pm-12:55 am
1 stop6h 20m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Tue 11/3
11:35 am-10:20 pm
2 stops9h 45m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Sun 11/1
5:35 pm-12:55 am
1 stop6h 20m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiSan Juan
MIA Miami - SJU San Juan Luis Munoz Marin Intl
MIASJU
Miami
Thu 10/29
5:20 am-4:45 pm
2 stops11h 25m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$126
MiamiAguadilla
MIA Miami - BQN Aguadilla Borinquen
MIABQN
Miami
Sun 10/4
9:43 pm-9:54 am
2 stops36h 11m
Aguadilla Borinquen
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$165
Showing 1-10 of 52 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-VQS
MIA-CPX
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-VQS
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 September 10, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 20% 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 September 5, 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 September 10, 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.
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - 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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
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 September 10, 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$96 | Average$220 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$100 | Average$304 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$108 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$200 | Average$299 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$238 | Average$488 | FlexibilityNo cancel fee | On-time71% |