$122+ 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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — MIA
Sep 22 — Sep 291
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 January, booked 73 days in advance, depart on a Thursday or Saturday and return on a Tuesday
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 August 23, 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 August 23, 2026.
This Frontier deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:26 pm -
1 stop7h 26m
Wed 9/165:50 am -
1 stop14h 35m
Deal found 8/19![Frontier logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” 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 10/89:25 am -
1 stop10h 59m
Sat 10/174:05 pm -
1 stop17h 40m
Deal found 8/20![Multiple Airlines logo]()
$278
This Frontier deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/68:26 pm -
1 stop7h 26m
Mon 9/145:50 am -
1 stop14h 35m
Deal found 8/21![Frontier logo]()
$279
This CheapOair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:20 pm -
1 stop27h 26m
Tue 9/155:50 am -
1 stop14h 35m
Deal found 8/18![Frontier logo]()
$282
This Super.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 9/258:20 pm -
1 stop27h 26m
Sat 10/35:50 am -
1 stop14h 35m
Deal found 8/19![Frontier logo]()
$285
This CheapOair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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 10/118:21 pm -
1 stop27h 26m
Sat 10/175:50 am -
1 stop14h 36m
Deal found 8/18![Frontier logo]()
$286
This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 10/118:21 pm -
1 stop27h 26m
Wed 10/145:50 am -
1 stop14h 36m
Deal found 8/21![Frontier logo]()
$288
This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/108:20 pm -
1 stop27h 26m
Tue 9/155:50 am -
1 stop14h 35m
Deal found 8/21![Frontier logo]()
$289
This Expedia deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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.
Wed 8/268:26 pm -
1 stop7h 26m
Wed 9/911:59 am -
1 stop8h 26m
Deal found 8/18![Frontier logo]()
$297
This Frontier deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/68:26 pm -
1 stop7h 26m
Sun 9/135:50 am -
1 stop14h 35m
Deal found 8/21![Frontier logo]()
$299
This Frontier deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/68:26 pm -
1 stop7h 26m
Tue 9/86:00 am -
1 stop14h 31m
Deal found 8/22![Frontier logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 10/229:25 am -
1 stop10h 59m
Sat 10/244:05 pm -
1 stop17h 40m
Deal found 8/19![Multiple Airlines logo]()
$302
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 August 23, 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 August 23, 2026.
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 11/55:30 am -
1 stop5h 03m
Tue 11/101:22 pm -
2 stops10h 29m
Deal found 8/21![United Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:50 am -
1 stop7h 40m
Thu 9/173:20 pm -
2 stops7h 40m
Deal found 8/23![Southwest logo]()
$398
This Delta deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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.
Sat 2/134:25 pm -
1 stop7h 27m
Sun 2/217:00 am -
1 stop7h 22m
Deal found 8/19![Delta logo]()
$453
This Southwest deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” 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 10/11:55 pm -
2 stops8h 50m
Mon 10/56:10 pm -
2 stops7h 30m
Deal found 8/20![Southwest logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 11/287:15 pm -
1 stop7h 15m
Fri 12/410:07 am -
1 stop6h 37m
Deal found 8/22![United Airlines logo]()
$439
This Southwest deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/216:00 am -
2 stops8h 20m
Thu 9/245:45 am -
2 stops8h 05m
Deal found 8/22![Southwest logo]()
$421
This Southwest deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:25 pm -
1 stop8h 25m
Thu 11/267:40 am -
2 stops9h 35m
Deal found 8/22![Southwest logo]()
$426
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 10/77:00 am -
2 stops10h 52m
Wed 10/144:01 pm -
1 stop7h 49m
Deal found 8/21![United Airlines logo]()
$488
This Southwest deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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 11/268:15 am -
2 stops9h 25m
Tue 12/86:50 am -
2 stops7h 25m
Deal found 8/18![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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 9/265:40 am -
2 stops8h 15m
Sun 10/45:15 am -
2 stops7h 50m
Deal found 8/18![Southwest logo]()
$460
This Southwest deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:00 pm -
2 stops8h 10m
Sun 10/255:15 am -
2 stops7h 50m
Deal found 8/22![Southwest logo]()
$480
This Southwest deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” 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 10/81:55 pm -
2 stops8h 10m
Thu 10/157:10 am -
2 stops9h 05m
Deal found 8/20![Southwest logo]()
$498
Last-minute flights from San Antonio to Key LargoDiscover last-minute flight deals from San Antonio to Key Largo. Data last updated August 23, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Key Largo. Data last updated August 23, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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.
Wed 8/268:26 pm -
1 stop7h 26m
Wed 9/911:59 am -
1 stop8h 26m
Deal found 8/18![Frontier logo]()
$297
This Frontier deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:26 pm -
1 stop7h 26m
Wed 9/165:50 am -
1 stop14h 35m
Deal found 8/19![Frontier logo]()
$277
This Frontier deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/68:26 pm -
1 stop7h 26m
Mon 9/145:50 am -
1 stop14h 35m
Deal found 8/21![Frontier logo]()
$279
This Frontier deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/68:26 pm -
1 stop7h 26m
Sun 9/135:50 am -
1 stop14h 35m
Deal found 8/21![Frontier logo]()
$299
This Frontier deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/68:26 pm -
1 stop7h 26m
Tue 9/86:00 am -
1 stop14h 31m
Deal found 8/22![Frontier logo]()
$300
This Trip.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:20 pm -
1 stop27h 26m
Sat 9/125:50 am -
1 stop14h 35m
Deal found 8/22![Frontier logo]()
$303
This CheapOair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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 9/108:20 pm -
1 stop27h 26m
Mon 9/215:50 am -
1 stop14h 35m
Deal found 8/18![Frontier logo]()
$286
This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/108:20 pm -
1 stop27h 26m
Tue 9/155:50 am -
1 stop14h 35m
Deal found 8/21![Frontier logo]()
$289
This CheapOair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:20 pm -
1 stop27h 26m
Tue 9/155:50 am -
1 stop14h 35m
Deal found 8/18![Frontier logo]()
$282
This CheapOair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:20 pm -
1 stop27h 26m
Mon 9/215:50 am -
1 stop14h 35m
Deal found 8/18![Frontier logo]()
$304
This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/138:20 pm -
1 stop27h 26m
Sat 9/195:50 am -
1 stop14h 35m
Deal found 8/21![Frontier logo]()
$288
This Super.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 9/258:20 pm -
1 stop27h 26m
Sat 10/35:50 am -
1 stop14h 35m
Deal found 8/19![Frontier logo]()
$285
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 August 23, 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 August 23, 2026.
This eDestinos deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:20 pm -
1 stop27h 26m
Deal found 8/23![Frontier logo]()
$122
This Expedia deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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.
Tue 9/88:26 pm -
1 stop27h 20m
Deal found 8/18![Frontier logo]()
$133
This CheapOair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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 9/178:20 pm -
1 stop27h 26m
Deal found 8/18![Frontier logo]()
$134
This Super.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/218:20 pm -
1 stop27h 26m
Deal found 8/22![Frontier logo]()
$135
This Trip.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:20 pm -
1 stop27h 26m
Deal found 8/19![Frontier logo]()
$137
This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” 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 9/158:20 pm -
1 stop27h 26m
Deal found 8/21![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” 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 11/199:25 am -
1 stop10h 54m
Deal found 8/20![Multiple Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” 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 10/89:25 am -
1 stop10h 59m
Deal found 8/18![Multiple Airlines logo]()
$145
This Frontier deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 11/157:56 pm -
1 stop8h 52m
Deal found 8/19![Frontier logo]()
$149
This Frontier deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:26 pm -
1 stop7h 26m
Deal found 8/18![Frontier logo]()
$150
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 August 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $277 (Frontier) |
One-way from | $122 (eDestinos) |
Popular in | December |
Cheapest in | October |
Average price | $430 |
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 7,457,451 searches. Data last updated August 23, 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 San Antonio - MIA Miami
SATMIA
San Antonio
Thu 11/5
5:30 am-11:33 am
1 stop5h 03m
Miami
Tue 11/10
1:22 pm-10:51 pm
2 stops10h 29m
$398
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Tue 9/15
6:50 am-3:30 pm
1 stop7h 40m
Miami
Thu 9/17
3:20 pm-10:00 pm
2 stops7h 40m
$398
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Thu 10/1
1:55 pm-11:45 pm
2 stops8h 50m
Miami
Mon 10/5
6:10 pm-12:40 am
2 stops7h 30m
$403
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Mon 9/21
6:00 am-3:20 pm
2 stops8h 20m
Miami
Thu 9/24
5:45 am-12:50 pm
2 stops8h 05m
$421
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Wed 11/25
1:25 pm-10:50 pm
1 stop8h 25m
Miami
Thu 11/26
7:40 am-4:15 pm
2 stops9h 35m
$426
Quickest round-trip
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Sat 11/28
7:15 pm-3:30 am
1 stop7h 15m
Miami
Fri 12/4
10:07 am-3:44 pm
1 stop6h 37m
$439
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Thu 11/26
8:15 am-6:40 pm
2 stops9h 25m
Miami
Tue 12/8
6:50 am-1:15 pm
2 stops7h 25m
$441
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Sat 2/13
4:25 pm-12:52 am
1 stop7h 27m
Miami
Sun 2/21
7:00 am-1:22 pm
1 stop7h 22m
$453
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Sat 9/26
5:40 am-2:55 pm
2 stops8h 15m
Miami
Sun 10/4
5:15 am-12:05 pm
2 stops7h 50m
$460
San AntonioMiami
SAT San Antonio - MIA Miami
SATMIA
San Antonio
Wed 10/21
1:00 pm-10:10 pm
2 stops8h 10m
Miami
Sun 10/25
5:15 am-12:05 pm
2 stops7h 50m
$480
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
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 August 23, 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 15% on your trip compared to booking a flight in the morning.
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 August 23, 2026.
The most flights from SAT to KE9 are scheduled on a Saturday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from San Antonio to Key Largo?
Airfare is below average for this route at the moment.
San Antonio to Key Largo flights typically cost between $330 and $517 in September.The cheapest round-trip price found within the last 5 days was $277 on Frontier (Sep 2-Sep 16).
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 May 23, 2026.
Travelers seeking maximum savings on their San Antonio to Key Largo flight should consider departing on Saturday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 August 23, 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.
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
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.
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
Other flights from San Antonio
Popular flights
Top destinations
Alternative routes for San Antonio to Key Largo
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Key Largo by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Antonio to Key Largo by cabin class
Find flights from San Antonio to Key Largo, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Antonio and Key Largo flights
Browse other San Antonio and Key Largo flight options. Last updated on August 23, 2026.
Other flights from San Antonio
Browse through other flights departing from San Antonio. Flights are based on user searches made on Cheapflights and were last updated on August 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Antonio to Key Largo flights
Consider these flights traveling from San Antonio to Key Largo.
Top 6 airlines flying from San Antonio to Key Largo
Discover the top 6 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 7,457,451 searches. Data last updated August 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$125 | Average$270 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$137 | Average$389 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$470 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$199 | Average$452 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$202 | Average$395 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$288 | Average$434 | FlexibilityNo cancel fee | On-time69% |