$59+ Cheap flights from Key Largo, FL to San Juan
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 3/21. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Mar 9 — Mar 161
1 adult, Economy
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Find cheap flights from Key Largo to San Juan 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.Cheapflights Tip: The best prices from Key Largo to San Juan are usually found in February or April, booked 67 days in advance, depart on a Monday or Tuesday and return on a Friday
Cheap flight deals from Key Largo to San Juan
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Best
Last-minute
One-way
Cheapest flights from Key Largo to San JuanExplore the most affordable flight options available from Key Largo to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 7, 2026.
Explore the most affordable flight options available from Key Largo to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Mon 4/69:25 pm
MIA
- SJU
Nonstop2h 33m
Multiple Airlines
Fri 4/106:00 am
SJU
- MIA
Nonstop3h 00m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Wed 3/113:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Tue 3/2411:03 am
SJU
- MIA
Nonstop2h 52m
Spirit Airlines
Deal found 2/4![Spirit Airlines logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 2/6. 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 2/243:26 pm
MIA
- SJU
Nonstop2h 32m
Multiple Airlines
Fri 2/276:00 am
SJU
- MIA
Nonstop2h 57m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 2/5. 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.
Thu 4/210:36 pm
MIA
- SJU
Nonstop2h 41m
Multiple Airlines
Tue 4/711:03 am
SJU
- MIA
Nonstop2h 52m
Multiple Airlines
Deal found 2/5![Multiple Airlines logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Wed 3/1110:40 pm
MIA
- SJU
Nonstop2h 39m
Multiple Airlines
Wed 3/2511:03 am
SJU
- MIA
Nonstop2h 52m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$121
This Frontier deal was found by Cheapflights users on 2/3. 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.
Mon 3/2310:42 pm
MIA
- SJU
Nonstop2h 39m
Frontier
Tue 3/316:39 pm
SJU
- MIA
Nonstop3h 01m
Frontier
Deal found 2/3![Frontier logo]()
$122
This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:05 am
MIA
- SJU
1 stop6h 17m
Spirit Airlines
Thu 2/2611:52 am
SJU
- MIA
Nonstop2h 58m
Spirit Airlines
Deal found 2/5![Spirit Airlines logo]()
$123
This Spirit deal was found by Cheapflights users on 2/6. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/31:38 pm
MIA
- SJU
1 stop10h 59m
Spirit Airlines
Tue 3/1010:52 am
SJU
- MIA
Nonstop2h 58m
Spirit Airlines
Deal found 2/6![Spirit Airlines logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Wed 3/43:26 pm
MIA
- SJU
Nonstop2h 32m
Multiple Airlines
Tue 3/106:39 pm
SJU
- MIA
Nonstop3h 01m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$125
This Frontier deal was found by Cheapflights users on 2/6. 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.
Mon 3/29:02 am
MIA
- SJU
Nonstop2h 37m
Frontier
Mon 3/96:46 pm
SJU
- MIA
Nonstop3h 01m
Frontier
Deal found 2/6![Frontier logo]()
$126
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/269:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Tue 3/3112:05 pm
SJU
- MIA
1 stop8h 02m
Spirit Airlines
Deal found 2/7![Spirit Airlines logo]()
$127
This CheapOair deal was found by Cheapflights users on 2/6. 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.
Tue 3/103:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Tue 3/1712:05 pm
SJU
- MIA
1 stop8h 02m
Spirit Airlines
Deal found 2/6![Spirit Airlines logo]()
$128
Best flights from Key Largo to San JuanDiscover carefully curated flight deals from Key Largo to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 7, 2026.
Discover carefully curated flight deals from Key Largo to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 7, 2026.
This Spirit deal was found by Cheapflights users on 2/3. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/97:05 am
MIA
- SJU
1 stop9h 27m
Spirit Airlines
Tue 3/1010:52 am
SJU
- MIA
Nonstop2h 58m
Spirit Airlines
Deal found 2/3![Spirit Airlines logo]()
$128
This CheapOair deal was found by Cheapflights users on 2/6. 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 3/72:15 pm
MIA
- SJU
Nonstop2h 40m
Multiple Airlines
Thu 3/1912:05 pm
SJU
- MIA
1 stop8h 02m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$182
This Delta deal was found by Cheapflights users on 2/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/64:44 pm
MIA
- SJU
1 stop6h 29m
Delta
Sun 5/105:15 pm
SJU
- MIA
1 stop7h 40m
Delta
Deal found 2/6![Delta logo]()
$210
This Southwest deal was found by Cheapflights users on 2/6. 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.
Tue 5/1212:10 pm
MIA
- SJU
2 stops8h 55m
Southwest
Sat 5/1610:00 am
SJU
- MIA
1 stop13h 00m
Southwest
Deal found 2/6![Southwest logo]()
$235
This Cheapflightsfares deal was found by Cheapflights users on 2/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/101:38 pm
MIA
- SJU
1 stop10h 59m
Spirit Airlines
Sun 3/1511:03 am
SJU
- MIA
Nonstop2h 52m
Spirit Airlines
Deal found 2/6![Spirit Airlines logo]()
$188
This Southwest deal was found by Cheapflights users on 2/4. 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 4/287:00 am
MIA
- SJU
1 stop11h 10m
Southwest
Tue 5/58:10 am
SJU
- MIA
2 stops13h 00m
Southwest
Deal found 2/4![Southwest logo]()
$235
This CheapOair deal was found by Cheapflights users on 2/6. 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.
Thu 3/59:02 am
MIA
- SJU
Nonstop2h 37m
Multiple Airlines
Sun 3/810:52 am
SJU
- MIA
Nonstop2h 58m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$286
This Spirit deal was found by Cheapflights users on 2/5. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Sun 3/111:52 am
SJU
- MIA
Nonstop2h 58m
Spirit Airlines
Deal found 2/5![Spirit Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 2/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:00 am
MIA
- SJU
1 stop7h 18m
Delta
Fri 5/155:15 pm
SJU
- MIA
1 stop7h 40m
Delta
Deal found 2/5![Delta logo]()
$310
This Southwest deal was found by Cheapflights users on 2/4. 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.
Thu 6/115:55 am
MIA
- SJU
1 stop4h 50m
Southwest
Mon 6/154:00 pm
SJU
- MIA
1 stop6h 05m
Southwest
Deal found 2/4![Southwest logo]()
$287
This Spirit deal was found by Cheapflights users on 2/6. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/29:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Sat 4/111:39 am
SJU
- MIA
1 stop11h 08m
Spirit Airlines
Deal found 2/6![Spirit Airlines logo]()
$293
Last-minute flights from Key Largo to San JuanDiscover last-minute flight deals from Key Largo to San Juan. Data last updated February 7, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to San Juan. Data last updated February 7, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:05 am
MIA
- SJU
1 stop6h 17m
Spirit Airlines
Thu 2/2611:52 am
SJU
- MIA
Nonstop2h 58m
Spirit Airlines
Deal found 2/5![Spirit Airlines logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 2/6. 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 2/243:26 pm
MIA
- SJU
Nonstop2h 32m
Multiple Airlines
Fri 2/276:00 am
SJU
- MIA
Nonstop2h 57m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$119
This Priceline deal was found by Cheapflights users on 2/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:05 am
MIA
- SJU
1 stop6h 17m
Spirit Airlines
Sat 2/2811:52 am
SJU
- MIA
Nonstop2h 58m
Spirit Airlines
Deal found 2/4![Spirit Airlines logo]()
$120
This Frontier deal was found by Cheapflights users on 2/6. 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.
Mon 3/29:02 am
MIA
- SJU
Nonstop2h 37m
Frontier
Mon 3/96:46 pm
SJU
- MIA
Nonstop3h 01m
Frontier
Deal found 2/6![Frontier logo]()
$126
This Spirit deal was found by Cheapflights users on 2/6. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/31:38 pm
MIA
- SJU
1 stop10h 59m
Spirit Airlines
Tue 3/1010:52 am
SJU
- MIA
Nonstop2h 58m
Spirit Airlines
Deal found 2/6![Spirit Airlines logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 2/6. 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.
Wed 3/43:26 pm
MIA
- SJU
Nonstop2h 32m
Multiple Airlines
Wed 3/116:39 pm
SJU
- MIA
Nonstop3h 01m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$125
This CheapOair deal was found by Cheapflights users on 2/6. 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.
Tue 3/103:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Tue 3/1712:05 pm
SJU
- MIA
1 stop8h 02m
Spirit Airlines
Deal found 2/6![Spirit Airlines logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Wed 3/113:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Tue 3/2411:03 am
SJU
- MIA
Nonstop2h 52m
Spirit Airlines
Deal found 2/4![Spirit Airlines logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Wed 3/1110:40 pm
MIA
- SJU
Nonstop2h 39m
Multiple Airlines
Wed 3/2511:03 am
SJU
- MIA
Nonstop2h 52m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$121
This Frontier deal was found by Cheapflights users on 2/3. 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.
Mon 3/2310:42 pm
MIA
- SJU
Nonstop2h 39m
Frontier
Tue 3/316:39 pm
SJU
- MIA
Nonstop3h 01m
Frontier
Deal found 2/3![Frontier logo]()
$122
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/269:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Tue 3/3112:05 pm
SJU
- MIA
1 stop8h 02m
Spirit Airlines
Deal found 2/7![Spirit Airlines logo]()
$127
One-way flights from Key Largo to San JuanSearch for one-way flight options from Key Largo to San Juan. Find affordable one-way fares based on user searches. Data last updated February 7, 2026.
Search for one-way flight options from Key Largo to San Juan. Find affordable one-way fares based on user searches. Data last updated February 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 3/219:25 pm
MIA
- SJU
Nonstop2h 33m
Spirit Airlines
Deal found 2/4![Spirit Airlines logo]()
$59
This Travelocity deal was found by Cheapflights users on 2/6. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/43:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Deal found 2/6![Spirit Airlines logo]()
$60
This Super.com deal was found by Cheapflights users on 2/3. 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 2/2210:50 pm
MIA
- SJU
Nonstop2h 39m
Frontier
Deal found 2/3![Frontier logo]()
$61
This Mytrip deal was found by Cheapflights users on 2/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:56 pm
MIA
- SJU
Nonstop2h 39m
Frontier
Deal found 2/6![Frontier logo]()
$62
This Super.com deal was found by Cheapflights users on 2/4. 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.
Sat 2/144:06 pm
MIA
- SJU
Nonstop2h 37m
Frontier
Deal found 2/4![Frontier logo]()
$63
This Frontier deal was found by Cheapflights users on 2/3. 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.
Fri 4/310:20 pm
MIA
- SJU
Nonstop2h 41m
Frontier
Deal found 2/3![Frontier logo]()
$65
This Spirit deal was found by Cheapflights users on 2/3. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/83:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Deal found 2/3![Spirit Airlines logo]()
$66
This Booking.com deal was found by Cheapflights users on 2/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/283:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Deal found 2/4![Spirit Airlines logo]()
$67
This CheapOair deal was found by Cheapflights users on 2/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:26 pm
MIA
- SJU
Nonstop2h 32m
Spirit Airlines
Deal found 2/7![Spirit Airlines logo]()
$68
This CheapOair deal was found by Cheapflights users on 2/6. 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.
Sun 3/1510:42 pm
MIA
- SJU
Nonstop2h 39m
Frontier
Deal found 2/6![Frontier logo]()
$69
Find flight deals from Key Largo to San Juan
Keep the following information in mind while searching for Key Largo to San Juan flight deals. Data was last updated February 7, 2026.
Round-trip from | $117 (Kiwi.com) |
|---|---|
One-way from | $59 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $171 |
Cheapflights Fare Finder
Customize your flight search to find flights from Key Largo to San Juan 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 February 7, 2026.
Use the filters below to find and compare flights from Key Largo to San Juan that are best for you.
Fly from
Key Largo
Fly to
San Juan
Route
Depart
Return
Price
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Mon 3/9
7:05 am-4:32 pm
1 stop9h 27m
San Juan Luis Munoz Marin Intl
Tue 3/10
10:52 am-1:50 pm
Nonstop2h 58m
$128
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Sat 3/7
2:15 pm-5:55 pm
Nonstop2h 40m
San Juan Luis Munoz Marin Intl
Thu 3/19
12:05 pm-8:07 pm
1 stop8h 02m
$182
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Tue 3/10
1:38 pm-12:37 am
1 stop10h 59m
San Juan Luis Munoz Marin Intl
Sun 3/15
11:03 am-1:55 pm
Nonstop2h 52m
$188
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Wed 5/6
4:44 pm-11:13 pm
1 stop6h 29m
San Juan Luis Munoz Marin Intl
Sun 5/10
5:15 pm-12:55 am
1 stop7h 40m
$210
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Tue 5/12
12:10 pm-9:05 pm
2 stops8h 55m
San Juan Luis Munoz Marin Intl
Sat 5/16
10:00 am-11:00 pm
1 stop13h 00m
$235
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Tue 4/28
7:00 am-6:10 pm
1 stop11h 10m
San Juan Luis Munoz Marin Intl
Tue 5/5
8:10 am-9:10 pm
2 stops13h 00m
$235
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 2/26
3:26 pm-6:58 pm
Nonstop2h 32m
San Juan Luis Munoz Marin Intl
Sun 3/1
11:52 am-1:50 pm
Nonstop2h 58m
$279
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 3/5
9:02 am-12:39 pm
Nonstop2h 37m
San Juan Luis Munoz Marin Intl
Sun 3/8
10:52 am-1:50 pm
Nonstop2h 58m
$286
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 6/11
5:55 am-10:45 am
1 stop4h 50m
San Juan Luis Munoz Marin Intl
Mon 6/15
4:00 pm-10:05 pm
1 stop6h 05m
$287
MiamiSan Juan
MIA - SJU
MIASJU
Miami
Thu 4/2
9:25 pm-11:58 pm
Nonstop2h 33m
San Juan Luis Munoz Marin Intl
Sat 4/11
1:39 am-12:47 pm
1 stop11h 08m
$293
Showing 1-10 of 23 results
Best time to book a flight from Key Largo to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Key Largo with our price prediction graph.
MIA-SJU
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 San Juan
KE9-PR1
MIA-SJU
How far ahead should I book a flight from Key Largo to San Juan?
Use this chart to determine the optimal time to book a round-trip flight from Key Largo to San Juan. Price data was last updated on January 30, 2026.
The price you pay for your flight from Key Largo to San Juan may vary depending on when you book. For the best chance of a lower fare, look to book 67 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Key Largo to San Juan?
Currently, March is the cheapest month in which you can book a flight from Key Largo to San Juan (average of $61). Flying from Key Largo to San Juan 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 SJU?
Find hourly flight availability from Key Largo to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 7, 2026.
It’s typically best to fly out from Key Largo to San Juan in the afternoon. Doing so could potentially save you 21% on the flight price compared to flying at noon, which is usually more expensive.
What is the cheapest day to fly from Key Largo to San Juan?
Use this chart to determine the cheapest time to fly round-trip from Key Largo to San Juan. Price data was last updated on February 7, 2026.
Travelers seeking maximum savings on their Key Largo to San Juan flight should consider departing on Sunday afternoons when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Key Largo to San Juan
Explore weekly flight availability from Key Largo to San Juan. 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 February 7, 2026.
The most flights from KE9 to PR1 are scheduled on a Thursday (20 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 on average).
Reviews of airlines servicing San Juan
Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated February 7, 2026.
Read through reviews of airlines operating flights from Key Largo to San Juan, such as Delta, American Airlines, and JetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
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 San Juan. 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 San Juan
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Complete your trip
Complete your trip to San Juan by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Key Largo to San Juan by cabin class
Find flights from Key Largo to San Juan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Key Largo and San Juan flights
Browse other Key Largo and San Juan flight options. Last updated on February 7, 2026.
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Key Largo to San Juan flights
Consider these flights traveling from Key Largo to San Juan.
Top 6 airlines flying from Key Largo to San Juan
Discover the top 6 airlines that operate flights from Key Largo to San Juan. 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 February 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$65 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$70 | Average$195 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$83 | Average$273 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$108 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$189 | Average$317 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$218 | Average$440 | FlexibilityNo cancel fee | On-time71% |