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

This flight path from San Antonio to Key Largo was viewed by 40 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the cheapest airlines to fly from San Antonio to Key Largo one-way?

One-way options have recently been found by users for as low as $79 on Frontier. Other airlines that offer cheap prices include Southwest from $124 and Delta from $138 one-way.

Weekly flight availability from San Antonio to Key Largo

The most flights from SAT to KE9 are scheduled on a Monday (3 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

In terms of precipitation, rainfall in Key Largo ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Key Largo when rainfall is around 1.6 in.

If weather is an important factor for your trip to Key Largo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

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 $531, our data indicates the cheapest price to be $176. The most popular route (San Antonio - Miami), is priced around $363.

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

Consider Qatar Airways (95%), American Airlines (86%) or GOL (85%) when booking your flight. These represent the most reliable airlines when flying from San Antonio to Key Largo.

What are the most popular airlines that fly from San Antonio to Key Largo?

When booking a flight from San Antonio to Key Largo, you may want to consider flying on American Airlines, Southwest or Frontier as they are the most popular for this route.

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.

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.

Find Cheap Flights from San Antonio to Key Largo

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Cheapflights Tip: The best prices from San Antonio to Key Largo are usually found in February or January, booked 44 days in advance, depart on a Thursday or Saturday and return on a Tuesday

Find flight deals from San Antonio to Key Largo

Most accurate provider	FlightHub 3 stars
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Popular in	December
Cheapest in	February
Average price	$430

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Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Everything you need to know about your flight from San Antonio to Key Largo

Prices

Airlines

What is the cheapest time of day to fly from SAT to KE9?

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.

What is the cheapest day to fly from San Antonio to Key Largo?

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

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.

Southwest

7.9

Good

4,227 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Southwest

7.9

Good

4,227 reviews

Southwest

7.9

Good

4,227 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Delta

7.8

Good

8,654 reviews

Southwest

7.9

Good

4,227 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

United Airlines

7.4

Good

10,332 reviews

Southwest

7.9

Good

4,227 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

American Airlines

7.0

Good

12,152 reviews

Southwest

7.9

Good

4,227 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Frontier

5.6

Fair

2,551 reviews

Southwest

7.9

Good

4,227 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Related info for your journey

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 40 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
What are the cheapest airlines to fly from San Antonio to Key Largo one-way?
One-way options have recently been found by users for as low as $79 on Frontier. Other airlines that offer cheap prices include Southwest from $124 and Delta from $138 one-way.
What are the most reliable airlines from San Antonio to Key Largo?
Consider Qatar Airways (95%), American Airlines (86%) or GOL (85%) 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 $531, our data indicates the cheapest price to be $176. The most popular route (San Antonio - Miami), is priced around $363.
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.

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Top 6 airlines flying from San Antonio to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$125	Average$271	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$137	Average$406	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$202	Average$351	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$237	Average$452	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$256	Average$477	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$288	Average$456	FlexibilityNo cancel fee	On-time69%

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Cheap flights from San Antonio (SAT) to Key Largo, FL

Find cheap flights from San Antonio to Key Largo with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from San Antonio to Key Largo

Most accurate provider

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Popular in

Cheapest in

Average price

Cheapflights Insights

What is the cheapest time of day to fly from SAT to KE9?

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.

What is the cheapest day to fly from San Antonio to Key Largo?

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.

Weekly flight availability from San Antonio to Key Largo

The most flights from SAT to KE9 are scheduled on a Monday (3 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Key Largo

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.

Related info for your journey

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

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

What are the cheapest airlines to fly from San Antonio to Key Largo one-way?

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

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

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

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

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

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 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 October 10, 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 October 10, 2026.

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Top 6 airlines flying from San Antonio to Key Largo

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