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$523+ Cheap flights from Key Largo, FL to Australia

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SYD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Key Largo to Australia

Cheapest flights from Key Largo to Australia
Explore the most affordable flight options available from Key Largo to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This oojo deal was found by Cheapflights users on 12/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/227:45 pmMIA - MEL
2 stops29h 30mQantas Airways
Sun 12/286:45 amMEL - MIA
2 stops26h 10mQantas Airways
Deal found 12/17$1,339
This Qantas Airways deal was found by Cheapflights users on 12/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:34 pmMIA - MEL
2 stops29h 01mQantas Airways
Thu 1/296:45 amMEL - MIA
2 stops28h 55mQantas Airways
Deal found 12/16$1,351
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:15 pmMIA - MEL
1 stop23h 45mUnited Airlines
Tue 1/271:00 pmMEL - MIA
2 stops24h 54mUnited Airlines
Deal found 12/16$1,361
This Qantas Airways deal was found by Cheapflights users on 12/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:45 pmMIA - MEL
2 stops27h 50mQantas Airways
Sat 1/246:55 pmMEL - MIA
2 stops35h 38mQantas Airways
Deal found 12/16$1,362
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:15 pmMIA - MEL
1 stop23h 45mUnited Airlines
Sat 1/2411:30 amMEL - MIA
2 stops36h 21mUnited Airlines
Deal found 12/16$1,436
This Qantas Airways deal was found by Cheapflights users on 12/17. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:34 pmMIA - SYD
2 stops28h 16mQantas Airways
Wed 12/318:55 amSYD - MIA
2 stops27h 54mQantas Airways
Deal found 12/17$1,438
This Delta deal was found by Cheapflights users on 12/16. 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.
Tue 12/307:30 pmMIA - MEL
2 stops44h 30mDelta
Fri 1/2310:10 amMEL - MIA
2 stops23h 00mDelta
Deal found 12/16$1,443
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:42 amMIA - MEL
1 stop33h 18mUnited Airlines
Thu 1/291:00 pmMEL - MIA
1 stop34h 51mUnited Airlines
Deal found 12/16$1,446
This Qantas Airways deal was found by Cheapflights users on 12/17. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:34 pmMIA - SYD
2 stops28h 16mQantas Airways
Sat 12/277:15 pmSYD - MIA
2 stops41h 58mQantas Airways
Deal found 12/17$1,461
This oojo deal was found by Cheapflights users on 12/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/221:27 pmMIA - BNE
2 stops51h 03mQantas Airways
Sat 12/276:30 pmBNE - MIA
2 stops37h 25mQantas Airways
Deal found 12/16$1,471
This KAYAK deal was found by Cheapflights users on 12/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/227:45 pmMIA - SYD
2 stops29h 55mQantas Airways
Tue 12/304:20 pmSYD - MIA
2 stops43h 35mQantas Airways
Deal found 12/17$1,627
This oojo deal was found by Cheapflights users on 12/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:25 amMIA - MEL
2 stops38h 05mCathay Pacific
Mon 1/263:35 pmMEL - MIA
2 stops47h 07mCathay Pacific
Deal found 12/16$1,641

Find flight deals from Key Largo to Australia

Keep the following information in mind while searching for Key Largo to Australia flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$892
(BestPriceTravel)

One-way from

$523
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$2,282
Provider with most accurate pricing for Miami-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Sydney Kingsford Smith flights.
Search Deals
From Key Largo to Australia
Search Deals
One-way flight from Key Largo to Australia
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($338 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($78 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 Key Largo to Australia 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 18, 2025.
Use the filters below to find and compare flights from Key Largo to Australia that are best for you.

Fly from

Key Largo

Fly to

Australia

Route

Depart

Return

Price

MiamiSydney

MIA - SYD

MIASYD

Miami

Thu 2/5

7:55 pm-8:50 pm

2 stops32h 55m

Sydney Kingsford Smith

Sat 2/14

11:20 am-7:10 pm

1 stop23h 50m

$939

MiamiSydney

MIA - SYD

MIASYD

Miami

Sat 3/14

7:40 pm-9:00 am

1 stop22h 20m

Sydney Kingsford Smith

Fri 3/20

11:20 am-9:23 pm

1 stop25h 03m

$1,006

MiamiSydney

MIA - SYD

MIASYD

Miami

Fri 3/13

1:40 pm-7:25 am

1 stop26h 45m

Sydney Kingsford Smith

Fri 3/20

11:20 am-6:53 pm

1 stop22h 33m

$1,006

MiamiSydney

MIA - SYD

MIASYD

Miami

Sun 2/1

5:55 pm-9:00 am

1 stop23h 05m

Sydney Kingsford Smith

Sun 2/15

11:20 am-7:10 pm

1 stop23h 50m

$1,048

MiamiSydney

MIA - SYD

MIASYD

Miami

Fri 1/30

7:15 am-8:30 am

2 stops33h 15m

Sydney Kingsford Smith

Sun 2/15

10:40 am-6:15 pm

2 stops23h 35m

$1,143

MiamiBrisbane

MIA - BNE

MIABNE

Miami

Thu 1/29

9:26 pm-8:45 am

3 stops44h 19m

Brisbane

Wed 2/11

10:45 am-11:59 pm

3 stops28h 14m

$1,156

MiamiCoolangatta

MIA - OOL

MIAOOL

Miami

Sun 2/1

5:55 pm-2:05 pm

2 stops29h 10m

Coolangatta Gold Coast

Sun 2/8

6:00 am-3:45 pm

2 stops24h 45m

$1,204

MiamiCoolangatta

MIA - OOL

MIAOOL

Miami

Sat 1/31

3:55 pm-9:40 am

2 stops26h 45m

Coolangatta Gold Coast

Sat 2/7

6:00 am-3:45 pm

2 stops24h 45m

$1,206

MiamiSydney

MIA - SYD

MIASYD

Miami

Sat 1/31

12:00 pm-8:30 am

2 stops28h 30m

Sydney Kingsford Smith

Fri 2/13

10:40 am-6:15 pm

2 stops23h 35m

$1,218

MiamiSydney

MIA - SYD

MIASYD

Miami

Fri 1/16

8:00 am-8:30 am

1 stop32h 30m

Sydney Kingsford Smith

Fri 1/23

10:40 am-12:51 am

2 stops30h 11m

$1,218

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 results
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Best time to book a flight from Key Largo to Australia

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

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

Currently, June is the cheapest month in which you can book a flight from Key Largo to Australia (average of $253). Flying from Key Largo to Australia in January is currently the most expensive (average of $1,051). 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 KE9 to AU?

Find hourly flight availability from Key Largo to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s typically best to fly out from Key Largo to Australia in the morning. Doing so could potentially save you 37% on the flight price compared to flying in the evening, which is usually more expensive.

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

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

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

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. 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 Australia. Reviews last updated December 18, 2025.
See what other customers who have flown with Fiji Airways, Qantas Airways, and United Airlines from Key Largo to Australia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Fiji Airways
8.1
Very good
210 reviews

Overall

8.1

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.5

Entertainment

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Fiji Airways
8.1
Very good
210 reviews
Fiji Airways
8.1
Very good
210 reviews

Overall

8.1

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.5

Entertainment

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Qantas Airways
7.5
Good
947 reviews
Fiji Airways
8.1
Very good
210 reviews

Overall

8.1

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.5

Entertainment

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
United Airlines
7.4
Good
9,092 reviews
Fiji Airways
8.1
Very good
210 reviews

Overall

8.1

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.5

Entertainment

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
American Airlines
7.2
Good
11,055 reviews
Fiji Airways
8.1
Very good
210 reviews

Overall

8.1

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.5

Entertainment

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Air Canada
7.1
Good
10,534 reviews
Fiji Airways
8.1
Very good
210 reviews

Overall

8.1

Boarding

8.2

Crew

8.5

Comfort

8.0

Food

7.5

Entertainment

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Departing from Key Largo to Australia will take you 32h 55m. There are 9328 mi between Key Largo and Australia. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airlines for a one-way flight from Key Largo to Australia are United Airlines ($434), Fiji Airways ($561), and Qantas Airways ($627).

  • What are the most popular routes from Key Largo to Australia?

    The most popular flight routes from Key Largo to Australia are Miami - Sydney Kingsford Smith, Miami - Melbourne and Miami - Melbourne Avalon.

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

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

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

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

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

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

    Currently, June is the cheapest month in which you can book a flight from Key Largo to Australia (average of $253). Flying from Key Largo to Australia in January is currently the most expensive (average of $1,051). 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 Key Largo to Australia

Discover the top 7 airlines that operate flights from Key Largo to Australia. 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$403Average$1,110FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$850Average$1,449FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$859Average$1,385FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$946Average$1,574FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$946Average$1,020FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$1,013Average$1,881FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,081Average$1,630FlexibilityNo cancel feeOn-time78%

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