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Key Largo

$55+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — MIA
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to Key Largo are usually found in October or November, booked 25 days in advance, depart on a Friday or Monday and return on a Thursday

Find flight deals from San Antonio to Key Largo

Cheapest flights from San Antonio to Key Largo
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 November 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:46 pmSAT - MIA
1 stop16h 02mFrontier
Fri 12/127:09 pmMIA - SAT
2 stops37h 46mFrontier
Deal found 11/2$176
This Frontier deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/83:12 pmSAT - MIA
1 stop14h 07mFrontier
Sat 11/156:00 amMIA - SAT
1 stop9h 17mFrontier
Deal found 11/1$178
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:46 pmSAT - MIA
1 stop6h 00mMultiple Airlines
Tue 12/912:00 pmMIA - SAT
2 stops31h 59mMultiple Airlines
Deal found 11/2$191
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:46 pmSAT - MIA
1 stop6h 00mMultiple Airlines
Mon 12/157:05 amMIA - SAT
2 stops35h 00mMultiple Airlines
Deal found 10/31$197
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:00 amSAT - MIA
2 stops27h 31mMultiple Airlines
Sun 12/145:30 amMIA - SAT
1 stop12h 21mMultiple Airlines
Deal found 11/2$203
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:00 amSAT - MIA
2 stops12h 54mMultiple Airlines
Fri 12/125:30 amMIA - SAT
1 stop12h 21mMultiple Airlines
Deal found 11/2$204
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:20 amSAT - MIA
Nonstop2h 49mAmerican Airlines
Sat 12/139:40 pmMIA - SAT
Nonstop3h 19mAmerican Airlines
Deal found 11/1$205
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:46 pmSAT - MIA
1 stop6h 00mMultiple Airlines
Sat 12/66:05 amMIA - SAT
2 stops26h 50mMultiple Airlines
Deal found 11/2$207
This Frontier deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/153:12 pmSAT - MIA
1 stop14h 07mFrontier
Mon 11/245:30 amMIA - SAT
1 stop11h 38mFrontier
Deal found 11/1$208
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:51 pmSAT - MIA
2 stops33h 55mFrontier
Sun 12/75:30 amMIA - SAT
1 stop12h 21mFrontier
Deal found 11/3$210
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:37 pmSAT - MIA
2 stops19h 51mMultiple Airlines
Fri 12/55:30 amMIA - SAT
1 stop12h 21mMultiple Airlines
Deal found 11/2$212
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:00 amSAT - MIA
2 stops36h 54mMultiple Airlines
Sun 12/145:30 amMIA - SAT
1 stop12h 21mMultiple Airlines
Deal found 11/3$213

Cheap 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 November 3, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$176
(Kiwi.com)

One-way from

$55
(Priceline)

Popular in

December

Cheapest in

October

Average price

$359
Provider with most accurate pricing for San Antonio-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Antonio-Miami flights.
Search Deals
From San Antonio to Key Largo
Search Deals
One-way flight from San Antonio to Key Largo
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 3, 2025.
Use the filters below to find and compare flights from San Antonio to Key Largo that are best for you.

Fly from

San Antonio

Fly to

Key Largo

Route

Depart

Return

Price

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 12/6

6:09 pm-10:00 pm

Nonstop2h 51m

Miami

Fri 12/12

7:06 am-2:04 pm

1 stop7h 58m

$233

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Thu 2/26

5:21 am-12:23 pm

1 stop6h 02m

Miami

Wed 3/4

8:15 am-3:24 pm

1 stop8h 09m

$258

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Thu 2/19

12:15 pm-9:02 pm

1 stop7h 47m

Miami

Sat 2/28

6:00 am-10:40 am

1 stop5h 40m

$258

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Thu 12/4

4:52 pm-12:46 am

1 stop6h 54m

Miami

Wed 12/10

6:00 am-10:31 am

1 stop5h 31m

$261

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Fri 1/9

5:10 am-8:58 am

Nonstop2h 48m

Miami

Mon 1/12

5:36 pm-11:58 pm

1 stop7h 22m

$299

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Tue 12/9

5:45 am-4:10 pm

1 stop9h 25m

Miami

Sun 12/14

7:35 pm-11:45 pm

1 stop5h 10m

$321

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Wed 12/10

6:30 am-2:45 pm

1 stop7h 15m

Miami

Sun 12/14

6:00 am-12:11 pm

1 stop7h 11m

$324

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Tue 12/2

1:00 pm-8:51 pm

1 stop6h 51m

Miami

Sun 12/7

6:00 am-10:31 am

1 stop5h 31m

$324

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 1/3

2:45 pm-12:40 am

2 stops8h 55m

Miami

Sat 1/10

7:00 am-5:50 pm

1 stop11h 50m

$342

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sun 12/7

5:46 pm-12:46 am

1 stop6h 00m

$73

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 18 results
1
2

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.
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

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 October 31, 2025.

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, October is the cheapest month in which you can book a flight from San Antonio to Key Largo (average of $72). Flying from San Antonio to Key Largo in January is currently the most expensive (average of $115). 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 November 3, 2025.

A simple way to save on the total cost of your ticket is to fly from San Antonio to Key Largo in the morning. If you’re flexible enough to do this you can expect to save up to 43% 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 December 16, 2024.

Travelers seeking maximum savings on their San Antonio to Key Largo flight should consider departing on Friday mornings when fares are most often at their lowest. Friday 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 November 3, 2025.

The most flights from SAT to KE9 are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

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 November 3, 2025.
Read through reviews of airlines operating flights from San Antonio to Key Largo, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
7.9
Good
8,002 reviews
Southwest
8.0
Very good
4,238 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,997 reviews
Southwest
8.0
Very good
4,238 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
11,038 reviews
Southwest
8.0
Very good
4,238 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Spirit Airlines
6.3
Okay
8,115 reviews
Southwest
8.0
Very good
4,238 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • What airport do you fly from for flights from San Antonio to Key Largo?

    Most people fly from San Antonio (SAT) if they book a flight from San Antonio to Key Largo. On average, San Antonio has 2 outbound flights to Key Largo per day from 6 airlines. San Antonio is conveniently located just 7.6 mi from San Antonio’s city center.

  • How popular is this San Antonio to Key Largo flight route?

    This flight path from San Antonio to Key Largo was viewed by 5 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from San Antonio to Key Largo?

    A quick flight from San Antonio to Key Largo can take about 2h 51m. American Airlines provides one of the quickest options available for as low as $233. Airlines will cover a distance of 1140 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most reliable airlines from San Antonio to Key Largo?

    Consider Envoy Air (93%), American Airlines (63%) or Qatar Airways (59%) when booking your flight. These represent the most reliable airlines when flying from San Antonio to Key Largo.

  • What are the cheapest flights from San Antonio to Key Largo?

    Looking for the cheapest flight from San Antonio to Key Largo? While on average our users pay $656, our data indicates the cheapest price to be $188. The most popular route (San Antonio - Miami), is priced around $169.

  • Can I find deals for flights from San Antonio to Key Largo that include hotel bookings?

    Yes. In addition to deals on San Antonio to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Key Largo.

  • Can I find deals for business class flights from San Antonio to Key Largo?

    Yes. Cheapflights offers flight deals from San Antonio to Key Largo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Antonio to Key Largo?

    Currently, October is the cheapest month in which you can book a flight from San Antonio to Key Largo (average of $72). Flying from San Antonio to Key Largo in January is currently the most expensive (average of $115). 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.

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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 2,558,603 searches. Data last updated November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$97Average$199FlexibilityNo cancel feeOn-time65%
FrontierCheapest$109Average$178FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$178Average$468FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$200Average$422FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$377FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$289Average$452FlexibilityNo cancel feeOn-time69%

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