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Key Largo

$46+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — MIA
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
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 75 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap 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 December 23, 2025.

This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:10 pmAUS - MIA
1 stop7h 21mDelta
Wed 1/77:15 pmMIA - AUS
Nonstop3h 20mDelta
Deal found 12/21$167
This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:20 amAUS - MIA
1 stop6h 34mDelta
Mon 1/57:15 amMIA - AUS
1 stop7h 42mDelta
Deal found 12/22$177
This Frontier deal was found by Cheapflights users on 12/22. 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.
Wed 12/315:51 pmAUS - MIA
1 stop5h 56mFrontier
Thu 1/812:52 pmMIA - AUS
1 stop12h 24mFrontier
Deal found 12/22$182
This Kiwi.com deal was found by Cheapflights users on 12/22. 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 12/315:51 pmAUS - MIA
1 stop5h 56mMultiple Airlines
Wed 1/75:20 amMIA - AUS
2 stops20h 38mMultiple Airlines
Deal found 12/22$184
This Kiwi.com deal was found by Cheapflights users on 12/21. 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 12/315:51 pmAUS - MIA
1 stop5h 56mMultiple Airlines
Tue 1/69:03 pmMIA - AUS
1 stop13h 44mMultiple Airlines
Deal found 12/21$185
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:20 amAUS - MIA
1 stop5h 33mDelta
Wed 1/77:15 pmMIA - AUS
Nonstop3h 20mDelta
Deal found 12/21$212
This Kiwi.com deal was found by Cheapflights users on 12/21. 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 12/315:51 pmAUS - MIA
1 stop5h 56mMultiple Airlines
Mon 1/59:59 pmMIA - AUS
2 stops27h 59mMultiple Airlines
Deal found 12/21$213

Find 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 December 23, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$93
(American Airlines)

One-way from

$46
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$302
Provider with most accurate pricing for Austin Bergstrom-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for Austin Bergstrom-Miami flights.
Search Deals
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. 20% potential increase in price ($76 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 December 2025
Search Deals

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 December 23, 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

Sun 1/11

8:45 am-12:40 pm

Nonstop2h 55m

Miami

Tue 1/13

7:15 pm-9:35 pm

Nonstop3h 20m

$137

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Wed 3/4

8:45 am-12:29 pm

Nonstop2h 44m

Miami

Sun 3/8

7:12 pm-9:44 pm

Nonstop3h 32m

$137

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Thu 1/29

8:45 am-12:40 pm

Nonstop2h 55m

Miami

Sat 2/7

7:15 pm-9:35 pm

Nonstop3h 20m

$137

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Thu 1/29

8:45 am-12:40 pm

Nonstop2h 55m

Miami

Mon 2/9

7:15 pm-9:35 pm

Nonstop3h 20m

$137

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Sat 1/31

1:20 pm-9:35 pm

1 stop7h 15m

Miami

Tue 2/3

9:00 am-11:20 am

Nonstop3h 20m

$144

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Sat 1/10

5:55 pm-12:51 am

1 stop5h 56m

Miami

Tue 1/20

7:15 pm-9:35 pm

Nonstop3h 20m

$147

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Tue 2/3

8:00 am-3:27 pm

1 stop6h 27m

Miami

Fri 2/20

7:15 pm-9:35 pm

Nonstop3h 20m

$147

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Wed 2/4

3:05 pm-9:41 pm

1 stop5h 36m

Miami

Mon 2/23

7:15 pm-9:35 pm

Nonstop3h 20m

$147

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Wed 2/4

8:45 am-12:40 pm

Nonstop2h 55m

Miami

Fri 2/6

10:29 am-5:29 pm

1 stop8h 00m

$147

AustinMiami

AUS - MIA

AUSMIA

Austin Bergstrom

Sun 2/8

8:45 am-12:40 pm

Nonstop2h 55m

Miami

Tue 2/10

8:15 am-12:49 pm

1 stop5h 34m

$147

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 22 results
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2
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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 December 19, 2025.

The best time to book flights from Austin to Key Largo is 75 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, December is the cheapest month in which you can book a flight from Austin to Key Largo (average of $58). Flying from Austin to Key Largo in April is currently the most expensive (average of $105). 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 December 23, 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 58% 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.

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 December 23, 2025.

The most flights from AUS to KE9 are scheduled on a Sunday (12 on average). You will have fewer flight options on Wednesday, 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 December 23, 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.
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

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
4,253 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

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
8,014 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

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
11,054 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

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
8,196 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

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.
Frontier
5.8
Fair
3,075 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

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 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 7 different airlines.

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

    Within the past month, 30 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 55m. Fly via Delta or Southwest 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 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 JetBlue ($28), Frontier ($31), and Spirit Airlines ($49).

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

    Consider KLM (100%), Spirit Airlines (100%) or LATAM Airlines (99%) 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 $739, our data shows the cheapest flight currently is $43. When looking at the most popular route, (Austin Bergstrom - Miami), you can expect to pay $91 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, December is the cheapest month in which you can book a flight from Austin to Key Largo (average of $58). Flying from Austin to Key Largo in April is currently the most expensive (average of $105). 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 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$34Average$191FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$74Average$172FlexibilityNo cancel feeOn-time65%
DeltaCheapest$129Average$316FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$132Average$264FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$159Average$397FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$175Average$414FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$186Average$373FlexibilityNo cancel feeOn-time69%

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