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Key Largo

$68+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — MIA
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from Austin Bergstrom to Key Largo are usually found in September or August, booked 88 days in advance, depart on a Friday or Wednesday 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 julio 29, 2025.

Round-trip from

$123
(FlightHub)

One-way from

$68
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$315
From Austin Bergstrom to Key Largo
Search Deals
One-way flight from Austin Bergstrom to Key Largo
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Highest demand for flights based on searches. 13% potential increase in price ($54 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 July 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 julio 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/215:55 pmAUS - MIA
Nonstop2h 55mFrontier
dom. 8/243:11 pmMIA - AUS
Nonstop2h 59mFrontier
Deal found 7/28$129
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/56:20 pmAUS - MIA
Nonstop2h 49mAmerican Airlines
sáb. 9/138:29 amMIA - AUS
Nonstop3h 02mAmerican Airlines
Deal found 7/29$145
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/136:51 pmAUS - MIA
Nonstop2h 40mMultiple Airlines
dom. 11/1611:07 amMIA - AUS
1 stop9h 36mMultiple Airlines
Deal found 7/29$159
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/313:30 pmAUS - MIA
1 stop5h 45mSouthwest
jue. 9/46:55 pmMIA - AUS
1 stop5h 45mSouthwest
Deal found 7/27$164

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 julio 29, 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

jue. 8/21

5:55 pm-9:50 pm

Nonstop2h 55m

Miami

dom. 8/24

3:11 pm-5:10 pm

Nonstop2h 59m

$123

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

vie. 9/5

5:14 am-9:07 am

Nonstop2h 53m

Miami

lun. 9/8

7:41 pm-9:43 pm

Nonstop3h 02m

$145

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

jue. 11/13

6:51 pm-10:31 pm

Nonstop2h 40m

Miami

dom. 11/16

11:07 am-7:43 pm

1 stop9h 36m

$159

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

dom. 8/31

3:30 pm-10:15 pm

1 stop5h 45m

Miami

jue. 9/4

6:55 pm-11:40 pm

1 stop5h 45m

$164

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

lun. 11/17

6:51 pm-10:31 pm

Nonstop2h 40m

$68

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

mié. 12/3

5:28 pm-9:15 pm

Nonstop2h 47m

$72

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

dom. 8/31

3:30 pm-10:15 pm

1 stop5h 45m

$82

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

vie. 9/26

6:20 pm-12:23 am

1 stop5h 03m

$109

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

sáb. 8/30

2:15 pm-10:15 pm

1 stop7h 00m

$119

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

mié. 8/27

7:15 am-10:04 am

2 stops25h 49m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 11 results
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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 July 25, 2025.

The best time to book flights from Austin to Key Largo is 88 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 julio 29, 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 Sunday 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 julio 29, 2025.

The most flights from AUS to KE9 are scheduled on a Tuesday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 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 julio 29, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United 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
4,238 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

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.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

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.
Delta
8.0
Very good
7,977 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

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.
United Airlines
7.4
Good
8,899 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

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.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

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.
Spirit Airlines
6.3
Okay
8,040 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

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 9 flights from Austin Bergstrom to Key Largo per day from 6 different airlines.

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

    Within the past month, 10 users have taken a look at flights from Austin Bergstrom to Key Largo.

  • What are the cheapest airlines to fly from Austin to Key Largo one-way?

    The cheapest airlines for a one-way flight from Austin to Key Largo are Frontier ($68), American Airlines ($72), and Southwest ($82).

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

    Consider Southwest (79%), Frontier (71%) or Iberia (64%) 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 $675, our data shows the cheapest flight currently is $70. When looking at the most popular route, (Austin Bergstrom - Miami), you can expect to pay $104 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 6 airlines flying from Austin to Key Largo

Discover the top 6 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 julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$87Average$181FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$95Average$193FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$180Average$394FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$188Average$510FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$194Average$432FlexibilityNo cancel feeOn-time63%
DeltaCheapest$198Average$349FlexibilityNo cancel feeOn-timeN/A

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