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Key Largo

$51+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — MIA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Austin Bergstrom to Key Largo are usually found in August or September, booked 64 days in advance, depart on a Friday or Sunday and return on a Thursday

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 September 15, 2025.

Round-trip from

$92
(Cheapflightsfares)

One-way from

$51
(Cheapflightsfares)

Popular in

March

Cheapest in

August

Average price

$248
From Austin Bergstrom to Key Largo
Search Deals
One-way flight from Austin Bergstrom to Key Largo
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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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 September 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:03 pmAUS - MIA
Nonstop2h 57mFrontier
Mon 9/223:59 pmMIA - AUS
Nonstop3h 04mFrontier
Deal found 9/14$92
This Frontier deal was found by Cheapflights users on 9/14. 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.
Thu 10/237:43 pmAUS - MIA
Nonstop2h 59mFrontier
Thu 10/307:40 amMIA - AUS
Nonstop3h 09mFrontier
Deal found 9/14$93
This Frontier deal was found by Cheapflights users on 9/14. 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 12/510:48 amAUS - MIA
Nonstop2h 43mFrontier
Sun 12/77:35 amMIA - AUS
Nonstop3h 18mFrontier
Deal found 9/14$94
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/610:34 amAUS - MIA
Nonstop2h 40mFrontier
Sun 11/97:30 amMIA - AUS
Nonstop3h 09mFrontier
Deal found 9/14$101
This Frontier deal was found by Cheapflights users on 9/15. 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 10/267:43 pmAUS - MIA
Nonstop2h 59mFrontier
Sun 11/27:30 amMIA - AUS
Nonstop3h 09mFrontier
Deal found 9/15$102
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:34 amAUS - MIA
Nonstop2h 40mFrontier
Sun 11/167:30 amMIA - AUS
Nonstop3h 09mFrontier
Deal found 9/13$103
This Southwest deal was found by Cheapflights users on 9/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/63:15 pmAUS - MIA
Nonstop2h 40mSouthwest
Wed 10/81:15 pmMIA - AUS
Nonstop3h 10mSouthwest
Deal found 9/12$107
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 11/259:13 amAUS - MIA
Nonstop2h 42mFrontier
Fri 12/57:35 amMIA - AUS
Nonstop3h 18mFrontier
Deal found 9/13$112
This Priceline deal was found by Cheapflights users on 9/13. 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.
Sun 10/55:00 pmAUS - MIA
1 stop6h 12mFrontier
Fri 10/107:59 amMIA - AUS
Nonstop3h 09mFrontier
Deal found 9/13$122
This Booking.com deal was found by Cheapflights users on 9/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/127:43 pmAUS - MIA
Nonstop2h 59mFrontier
Fri 10/175:15 amMIA - AUS
1 stop12h 41mFrontier
Deal found 9/14$123
This Booking.com deal was found by Cheapflights users on 9/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:17 pmAUS - MIA
Nonstop2h 57mFrontier
Fri 10/105:15 amMIA - AUS
1 stop12h 41mFrontier
Deal found 9/14$124
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:43 pmAUS - MIA
Nonstop2h 59mFrontier
Sun 10/266:00 amMIA - AUS
1 stop19h 33mFrontier
Deal found 9/14$127

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 September 15, 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

Sat 10/25

12:35 pm-4:15 pm

Nonstop2h 40m

Miami

Tue 10/28

5:30 pm-9:05 pm

1 stop4h 35m

$167

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Tue 10/14

1:10 pm-4:50 pm

Nonstop2h 40m

Miami

Tue 10/21

3:15 pm-10:10 pm

2 stops7h 55m

$172

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Sat 10/18

6:27 pm-12:29 am

1 stop5h 02m

Miami

Tue 10/21

6:00 am-11:05 am

1 stop6h 05m

$177

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Sat 11/8

5:00 pm-12:29 am

1 stop6h 29m

Miami

Tue 11/11

6:00 am-12:39 pm

1 stop7h 39m

$177

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Tue 10/28

10:43 am-6:34 pm

1 stop6h 51m

Miami

Tue 11/4

7:10 am-12:35 pm

1 stop6h 25m

$177

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Sat 12/6

6:28 pm-12:46 am

1 stop5h 18m

Miami

Wed 12/10

8:05 am-12:37 pm

1 stop5h 32m

$179

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Tue 10/14

1:10 pm-4:50 pm

Nonstop2h 40m

$79

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Mon 10/27

3:15 pm-6:55 pm

Nonstop2h 40m

$79

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Sat 10/25

12:35 pm-4:15 pm

Nonstop2h 40m

$79

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Tue 11/11

12:35 pm-4:15 pm

Nonstop2h 40m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 15 results
1
2

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 September 12, 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, September is the cheapest month in which you can book a flight from Austin to Key Largo (average of $232). Flying from Austin to Key Largo in March is currently the most expensive (average of $289). 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 September 15, 2025.

When flying from Austin to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 Thursday evenings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Austin to Key Largo

Explore weekly flight availability from Austin 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 September 15, 2025.

The most flights from AUS to KE9 are scheduled on a Monday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

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 September 15, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, 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.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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
8,015 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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.
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

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 8 flights from Austin Bergstrom to Key Largo per day from 7 different airlines.

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

    Within the past month, 8 users have taken a look at flights from Austin Bergstrom to Key Largo.

  • 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 40m. 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 American Airlines (57%), Iberia (53%) or GOL (50%) 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 $527, our data shows the cheapest flight currently is $59. When looking at the most popular route, (Austin Bergstrom - Miami), you can expect to pay $135 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, September is the cheapest month in which you can book a flight from Austin to Key Largo (average of $232). Flying from Austin to Key Largo in March is currently the most expensive (average of $289). 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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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$74Average$179FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$95Average$200FlexibilityNo cancel feeOn-time65%
DeltaCheapest$173Average$348FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$182Average$398FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$185Average$442FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$199Average$495FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$222Average$272FlexibilityNo cancel feeOn-time62%

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