$71+ Cheap flights from San Antonio (SAT) to Key Largo, FL
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — MIA
May 12 — May 191
Round-trip
1 adult, Economy
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Find cheap flights from San Antonio to Key Largo 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 San Antonio to Key Largo are usually found in October or September, booked 25 days in advance, depart on a Friday or Thursday and return on a Thursday
Cheap flight deals from San Antonio to Key Largo
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Antonio to Key LargoExplore the most affordable flight options available from San Antonio to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 12, 2026.
Explore the most affordable flight options available from San Antonio to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 12, 2026.
This Expedia deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Sun 5/176:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/10![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/117:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Mon 5/186:00 am
MIA
- SAT
2 stops37h 59m
Frontier
Deal found 4/11![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Tue 5/127:54 pm
SAT
- MIA
2 stops20h 55m
Frontier
Tue 5/196:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Sat 5/24:04 pm
SAT
- MIA
1 stop12h 01m
Frontier
Tue 5/58:47 pm
MIA
- SAT
2 stops47h 12m
Frontier
Deal found 4/7![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Tue 5/127:54 pm
SAT
- MIA
2 stops20h 55m
Frontier
Sat 5/166:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/147:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Tue 5/196:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/24:04 pm
SAT
- MIA
1 stop12h 01m
Multiple Airlines
Mon 5/411:24 am
MIA
- SAT
2 stops32h 35m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Thu 5/147:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Wed 5/206:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/7![Frontier logo]()
$199
This Expedia deal was found by Cheapflights users on 4/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Sun 5/176:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” 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 5/97:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Wed 5/136:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/12![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Sat 5/97:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Mon 5/119:19 pm
MIA
- SAT
2 stops22h 40m
Frontier
Deal found 4/8![Frontier logo]()
$203
Best flights from San Antonio to Key LargoDiscover carefully curated flight deals from San Antonio to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 12, 2026.
Discover carefully curated flight deals from San Antonio to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 12, 2026.
This Southwest deal was found by Cheapflights users on 4/9. 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.
Sun 5/1010:25 am
SAT
- MIA
2 stops6h 50m
Southwest
Tue 5/127:00 am
MIA
- SAT
2 stops9h 10m
Southwest
Deal found 4/9![Southwest logo]()
$269
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Sun 9/67:35 am
SAT
- MIA
1 stop7h 08m
United Airlines
Sat 9/127:07 am
MIA
- SAT
2 stops9h 32m
United Airlines
Deal found 4/6![United Airlines logo]()
$416
This Southwest deal was found by Cheapflights users on 4/9. 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 5/181:25 pm
SAT
- MIA
2 stops7h 35m
Southwest
Tue 5/191:25 pm
MIA
- SAT
2 stops9h 35m
Southwest
Deal found 4/9![Southwest logo]()
$269
This Southwest deal was found by Cheapflights users on 4/9. 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.
Sun 5/1010:25 am
SAT
- MIA
2 stops6h 50m
Southwest
Mon 5/115:30 am
MIA
- SAT
2 stops8h 45m
Southwest
Deal found 4/9![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/265:45 am
SAT
- MIA
1 stop7h 35m
Southwest
Tue 6/26:15 am
MIA
- SAT
1 stop6h 45m
Southwest
Deal found 4/11![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 7/255:10 pm
SAT
- MIA
1 stop4h 30m
Southwest
Tue 7/285:45 am
MIA
- SAT
2 stops8h 00m
Southwest
Deal found 4/11![Southwest logo]()
$366
This Southwest deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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 5/1912:45 pm
SAT
- MIA
2 stops8h 10m
Southwest
Tue 5/267:00 am
MIA
- SAT
2 stops9h 10m
Southwest
Deal found 4/10![Southwest logo]()
$394
This Southwest deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/21:20 pm
SAT
- MIA
2 stops7h 45m
Southwest
Mon 5/47:15 pm
MIA
- SAT
1 stop6h 00m
Southwest
Deal found 4/11![Southwest logo]()
$402
This Southwest deal was found by Cheapflights users on 4/9. 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.
Thu 6/43:10 pm
SAT
- MIA
2 stops8h 15m
Southwest
Tue 6/94:20 pm
MIA
- SAT
2 stops7h 35m
Southwest
Deal found 4/9![Southwest logo]()
$428
This Southwest deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 8/297:35 am
SAT
- MIA
2 stops7h 55m
Southwest
Mon 8/315:45 am
MIA
- SAT
2 stops8h 05m
Southwest
Deal found 4/11![Southwest logo]()
$437
Last-minute flights from San Antonio to Key LargoDiscover last-minute flight deals from San Antonio to Key Largo. Data last updated April 12, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Key Largo. Data last updated April 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Sat 5/24:04 pm
SAT
- MIA
1 stop12h 01m
Frontier
Tue 5/58:47 pm
MIA
- SAT
2 stops47h 12m
Frontier
Deal found 4/7![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/24:04 pm
SAT
- MIA
1 stop12h 01m
Multiple Airlines
Mon 5/411:24 am
MIA
- SAT
2 stops32h 35m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$198
This Frontier deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” 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 5/97:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Wed 5/136:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/12![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Sat 5/97:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Mon 5/119:19 pm
MIA
- SAT
2 stops22h 40m
Frontier
Deal found 4/8![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/117:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Mon 5/186:00 am
MIA
- SAT
2 stops37h 59m
Frontier
Deal found 4/11![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Tue 5/127:54 pm
SAT
- MIA
2 stops20h 55m
Frontier
Tue 5/196:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Tue 5/127:54 pm
SAT
- MIA
2 stops20h 55m
Frontier
Sat 5/166:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/147:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Tue 5/196:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Thu 5/147:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Wed 5/206:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/7![Frontier logo]()
$199
This Expedia deal was found by Cheapflights users on 4/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Sun 5/176:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/8![Frontier logo]()
$200
This Expedia deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Sun 5/176:30 am
MIA
- SAT
1 stop13h 29m
Frontier
Deal found 4/10![Frontier logo]()
$180
One-way flights from San Antonio to Key LargoSearch for one-way flight options from San Antonio to Key Largo. Find affordable one-way fares based on user searches. Data last updated April 12, 2026.
Search for one-way flight options from San Antonio to Key Largo. Find affordable one-way fares based on user searches. Data last updated April 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Tue 6/97:51 pm
SAT
- MIA
1 stop9h 03m
Frontier
Deal found 4/8![Frontier logo]()
$71
This Priceline deal was found by Cheapflights users on 4/8. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:54 pm
SAT
- MIA
1 stop8h 44m
Frontier
Deal found 4/8![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 6/87:54 pm
SAT
- MIA
1 stop8h 39m
Frontier
Deal found 4/8![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 4/294:49 pm
SAT
- MIA
2 stops30h 20m
Frontier
Deal found 4/8![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:39 pm
SAT
- MIA
1 stop9h 43m
Frontier
Deal found 4/10![Frontier logo]()
$99
This Frontier deal was found by Cheapflights users on 4/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/57:54 pm
SAT
- MIA
1 stop8h 39m
Frontier
Deal found 4/8![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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 5/117:54 pm
SAT
- MIA
2 stops20h 55m
Frontier
Deal found 4/10![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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 6/177:51 pm
SAT
- MIA
1 stop9h 03m
Frontier
Deal found 4/10![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Tue 5/57:54 pm
SAT
- MIA
2 stops17h 50m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 5/67:54 pm
SAT
- MIA
2 stops19h 33m
Frontier
Deal found 4/8![Frontier logo]()
$115
Find flight deals from San Antonio to Key Largo
Keep the following information in mind while searching for San Antonio to Key Largo flight deals. Data was last updated April 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $180 (Expedia) |
One-way from | $71 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $394 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Antonio to Key Largo that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 12, 2026.
Use the filters below to find and compare flights from San Antonio to Key Largo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Sun 5/10
10:25 am-6:15 pm
2 stops6h 50m
Miami
Tue 5/12
7:00 am-3:10 pm
2 stops9h 10m
$269
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Mon 5/18
1:25 pm-10:00 pm
2 stops7h 35m
Miami
Tue 5/19
1:25 pm-10:00 pm
2 stops9h 35m
$269
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Sun 5/10
10:25 am-6:15 pm
2 stops6h 50m
Miami
Mon 5/11
5:30 am-1:15 pm
2 stops8h 45m
$354
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Tue 5/26
5:45 am-2:20 pm
1 stop7h 35m
Miami
Tue 6/2
6:15 am-12:00 pm
1 stop6h 45m
$361
Quickest round-trip
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Sat 7/25
5:10 pm-10:40 pm
1 stop4h 30m
Miami
Tue 7/28
5:45 am-12:45 pm
2 stops8h 00m
$366
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Tue 5/19
12:45 pm-9:55 pm
2 stops8h 10m
Miami
Tue 5/26
7:00 am-3:10 pm
2 stops9h 10m
$394
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Sat 5/2
1:20 pm-10:05 pm
2 stops7h 45m
Miami
Mon 5/4
7:15 pm-12:15 am
1 stop6h 00m
$402
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Sun 9/6
7:35 am-3:43 pm
1 stop7h 08m
Miami
Sat 9/12
7:07 am-3:39 pm
2 stops9h 32m
$416
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Thu 6/4
3:10 pm-12:25 am
2 stops8h 15m
Miami
Tue 6/9
4:20 pm-10:55 pm
2 stops7h 35m
$428
San AntonioMiami
SAT - MIA
SATMIA
San Antonio
Sat 8/29
7:35 am-4:30 pm
2 stops7h 55m
Miami
Mon 8/31
5:45 am-12:50 pm
2 stops8h 05m
$437
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from San Antonio to Key Largo
Have a flexible travel schedule? Discover the best time to fly to Key Largo from San Antonio with our price prediction graph.
SAT-MIA
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 San Antonio to Key Largo
SAT-KE9
SAT-MIA
How far ahead should I book a flight from San Antonio to Key Largo?
Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Key Largo. Price data was last updated on April 9, 2026.
The price you pay for your flight from San Antonio to Key Largo may vary depending on when you book. For the best chance of a lower fare, look to book 25 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 San Antonio to Key Largo?
Currently, January is the cheapest month in which you can book a flight from San Antonio to Key Largo (average of $50). Flying from San Antonio to Key Largo in June is currently the most expensive (average of $100). 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 SAT to KE9?
Find hourly flight availability from San Antonio to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 12, 2026.
A simple way to save on the total cost of your ticket is to fly from San Antonio to Key Largo in the afternoon. If you’re flexible enough to do this you can expect to save up to 41% on your trip compared to booking a flight in the evening.
What is the cheapest day to fly from San Antonio to Key Largo?
Use this chart to determine the cheapest time to fly round-trip from San Antonio to Key Largo. Price data was last updated on April 11, 2026.
Travelers seeking maximum savings on their San Antonio to Key Largo flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from San Antonio to Key Largo
Explore weekly flight availability from San Antonio to Key Largo. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 12, 2026.
The most flights from SAT to KE9 are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).
How much does it cost to fly round-trip from San Antonio to Key Largo?
Reviews of airlines servicing Key Largo
Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated April 12, 2026.
Read through reviews of airlines operating flights from San Antonio to Key Largo, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Related info for your journey
Find useful and relevant information for your journey from San Antonio to Key Largo. 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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San Antonio and Key Largo flights
Browse other San Antonio and Key Largo flight options. Last updated on April 12, 2026.
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Top 7 airlines flying from San Antonio to Key Largo
Discover the top 7 airlines that operate flights from San Antonio to Key Largo. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$86 | Average$240 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$104 | Average$202 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$137 | Average$341 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$140 | Average$306 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$178 | Average$406 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$198 | Average$413 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$284 | Average$431 | FlexibilityNo cancel fee | On-time69% |