Key Largo

$59+ Cheap flights from Austin (AUS) 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — MIA
nov. 29 — déc. 61
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Cheapflights Tip: The best prices from Austin Bergstrom to Key Largo are usually found in September or August, booked 64 days in advance, depart on a Friday or Thursday and return on a Thursday

Find flight deals from Austin to Key Largo

Cheapest flights from Austin to Key Largo
Explore the most affordable flight options available from Austin to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octobre 30, 2025.

This Frontier deal was found by Cheapflights users on 10/30. 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.
jeu. 11/1312:32 pmAUS - MIA
1 stop11h 02mFrontier
jeu. 11/205:30 amMIA - AUS
1 stop11h 42mFrontier
Deal found 10/30$110
This CheapOair deal was found by Cheapflights users on 10/29. 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.
jeu. 11/610:34 amAUS - MIA
Nonstop2h 59mFrontier
jeu. 11/135:01 amMIA - AUS
1 stop7h 36mFrontier
Deal found 10/29$111
This Priceline deal was found by Cheapflights users on 10/28. 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.
ven. 12/56:08 pmAUS - MIA
1 stop5h 38mFrontier
lun. 12/87:05 amMIA - AUS
Nonstop3h 18mFrontier
Deal found 10/28$115
This Frontier deal was found by Cheapflights users on 10/29. 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.
dim. 11/309:08 amAUS - MIA
Nonstop2h 59mFrontier
lun. 12/157:05 amMIA - AUS
Nonstop3h 18mFrontier
Deal found 10/29$116
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jeu. 12/46:55 amAUS - MIA
1 stop21h 24mFrontier
lun. 12/87:05 amMIA - AUS
Nonstop3h 18mFrontier
Deal found 10/28$117
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
jeu. 11/1311:05 amAUS - MIA
1 stop9h 17mFrontier
lun. 11/176:00 amMIA - AUS
1 stop19h 32mFrontier
Deal found 10/27$118
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jeu. 11/1310:34 amAUS - MIA
Nonstop2h 59mMultiple Airlines
ven. 11/1412:05 pmMIA - AUS
2 stops11h 44mMultiple Airlines
Deal found 10/28$119
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jeu. 11/1310:34 amAUS - MIA
Nonstop2h 59mMultiple Airlines
sam. 11/151:58 pmMIA - AUS
2 stops9h 51mMultiple Airlines
Deal found 10/28$124
This CheapOair deal was found by Cheapflights users on 10/29. 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.
lun. 12/86:08 pmAUS - MIA
1 stop5h 38mFrontier
ven. 12/125:30 amMIA - AUS
1 stop12h 43mFrontier
Deal found 10/29$127
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
lun. 12/86:00 amAUS - MIA
2 stops17h 46mMultiple Airlines
ven. 12/127:35 amMIA - AUS
Nonstop3h 18mMultiple Airlines
Deal found 10/29$129
This CheapOair deal was found by Cheapflights users on 10/28. 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.
sam. 12/66:55 amAUS - MIA
1 stop21h 24mFrontier
mer. 12/106:00 amMIA - AUS
1 stop18h 12mFrontier
Deal found 10/28$130
This American Airlines deal was found by Cheapflights users on 10/30. 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.
mer. 12/35:00 amAUS - MIA
Nonstop2h 50mAmerican Airlines
mar. 12/97:15 pmMIA - AUS
Nonstop3h 15mAmerican Airlines
Deal found 10/30$131

Cheap flight deals from Austin to Key Largo

Keep the following information in mind while searching for Austin to Key Largo flight deals. Data was last updated octobre 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$109
(Kiwi.com)

One-way from

$59
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$275
Provider with most accurate pricing for Austin Bergstrom-Miami flight deals.
Provider most trusted by Cheapflights users for Austin Bergstrom-Miami flights.
From Austin Bergstrom to Key Largo
One-way flight from Austin Bergstrom to Key Largo
Highest demand for flights based on searches. 17% potential increase in price ($70 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in October 2025

Cheapflights Fare Finder

 
Customize your flight search to find flights from Austin 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 octobre 30, 2025.
Use the filters below to find and compare flights from Austin to Key Largo that are best for you.

Fly from

Austin

Fly to

Key Largo

Route

Depart

Return

Price

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

ven. 1/9

4:30 pm-10:00 pm

1 stop4h 30m

Miami

ven. 1/16

7:35 am-2:20 pm

2 stops7h 45m

$162

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

sam. 12/6

9:00 am-12:42 pm

Nonstop2h 42m

Miami

mer. 12/10

7:00 am-2:19 pm

1 stop8h 19m

$167

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

mer. 12/10

6:27 pm-12:46 am

1 stop5h 19m

Miami

dim. 12/14

7:15 pm-9:40 pm

Nonstop3h 25m

$167

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

sam. 12/13

9:00 am-12:42 pm

Nonstop2h 42m

Miami

mar. 12/16

5:00 pm-12:28 am

1 stop8h 28m

$167

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

mar. 12/16

5:25 am-11:21 am

1 stop4h 56m

Miami

mer. 12/17

8:05 am-12:37 pm

1 stop5h 32m

$177

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

sam. 12/6

5:00 pm-12:46 am

1 stop6h 46m

Miami

mar. 12/9

6:30 pm-12:28 am

1 stop6h 58m

$177

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

mar. 1/20

8:45 am-12:40 pm

Nonstop2h 55m

Miami

mar. 1/27

7:15 pm-9:35 pm

Nonstop3h 20m

$179

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

mer. 1/21

8:45 am-12:40 pm

Nonstop2h 55m

Miami

lun. 1/26

7:15 pm-9:35 pm

Nonstop3h 20m

$183

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

jeu. 1/15

8:45 am-12:40 pm

Nonstop2h 55m

Miami

lun. 1/19

7:15 pm-9:35 pm

Nonstop3h 20m

$187

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

sam. 1/10

1:30 pm-9:30 pm

1 stop7h 00m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 18 results
1
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Best time to book a flight from Austin to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Austin 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 Austin to Key Largo

How far ahead should I book a flight from Austin to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from Austin to Key Largo. Price data was last updated on October 24, 2025.

The best time to book flights from Austin to Key Largo is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Austin to Key Largo?

Currently, October is the cheapest month in which you can book a flight from Austin to Key Largo (average of $72). Flying from Austin 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 AUS to KE9?

Find hourly flight availability from Austin 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 octobre 30, 2025.

One of the essential ways to save on airfare from Austin to Key Largo is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 60% on airfare.

What is the cheapest day to fly from Austin to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from Austin to Key Largo. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Austin to Key Largo flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Austin 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 octobre 30, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and American Airlines from Austin to Key Largo by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

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.

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

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.

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

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.

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

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.

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

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.

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

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 Austin 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 Austin to Key Largo?

    If you book a flight to Key Largo from Austin, you will be flying from Austin Bergstrom, which is the city’s only airport. Austin Bergstrom (AUS) is located 7.5 mi from the center of Austin. There are 4 flights from Austin Bergstrom to Key Largo per day from 7 different airlines.

  • How popular is this Austin to Key Largo flight route?

  • How long is the flight from Austin to Key Largo?

    There are many flights that can get you from Austin to Key Largo in 2h 42m. Fly via Southwest or Delta to get the fastest option. Airlines will cover a distance of 1101 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 Austin to Key Largo?

    Consider Envoy Air (89%), Frontier (85%) or Qatar Airways (80%) when booking your flight. These represent the most reliable airlines when flying from Austin to Key Largo.

  • What are the cheapest flights from Austin to Key Largo?

    While on average a flight from Austin to Key Largo is generally $713, our data shows the cheapest flight currently is $48. When looking at the most popular route, (Austin Bergstrom - Miami), you can expect to pay $102 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Austin 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 Austin to Key Largo?

    Currently, October is the cheapest month in which you can book a flight from Austin to Key Largo (average of $72). Flying from Austin 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.

See more FAQs

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Alternative routes for Austin to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Austin to Key Largo

Discover the top 7 airlines that operate flights from Austin 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 octobre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$29Average$197FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$85Average$185FlexibilityNo cancel feeOn-time65%
DeltaCheapest$157Average$330FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$171Average$396FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$177Average$436FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$197Average$280FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$216Average$462FlexibilityNo cancel feeOn-time69%

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