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Cheap flights from Sydney to Key Largo from $697

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — MIA
9 Sep — 16 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Sydney to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from Sydney to Key Largo
Explore the most affordable flight options available from Sydney to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 August 2026.

Tue 8/913:15 -
3 stops35h 15m
Mon 14/905:32 -
3 stops40h 18m
Deal found 9/8$1,266
Mon 9/1111:20 -
1 stop22h 02m
Thu 12/1108:00 -
2 stops33h 35m
Deal found 9/8$1,338
Tue 8/909:20 -
2 stops40h 54m
Tue 24/1108:00 -
2 stops33h 35m
Deal found 8/8$1,341
Tue 8/909:20 -
2 stops50h 57m
Mon 14/907:55 -
2 stops57h 25m
Deal found 9/8$1,359
Mon 28/909:20 -
2 stops50h 57m
Mon 12/1018:10 -
1 stop23h 10m
Deal found 6/8$1,362
Wed 23/913:15 -
3 stops40h 09m
Mon 28/905:32 -
3 stops40h 18m
Deal found 10/8$1,373
Mon 9/1111:20 -
3 stops40h 56m
Thu 12/1112:50 -
2 stops28h 45m
Deal found 9/8$1,380
Mon 16/1111:20 -
1 stop22h 02m
Sun 29/1108:00 -
2 stops57h 35m
Deal found 5/8$1,399

Find flight deals from Sydney to Key Largo

Keep the following information in mind while searching for Sydney to Key Largo flight deals. Data was last updated 10 August 2026.

Round-trip from

$1,266

One-way from

$697

Popular in

January

Cheapest in

February

Average price

$1,772
8/9-14/9
  • 8/9-14/9
  • 6 total stops
  • 75h 33m total
  • Sydney to Key Largo
Search Deals
4/9
  • 4/9
  • 3 total stops
  • 53h 37m total
  • Sydney to Key Largo
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($286 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($76 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Sydney 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 647,157 searches. Data last updated 10 August 2026.
Use the filters below to find and compare flights from Sydney to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Mon 9/11

11:20-12:16

2 stops40h 56m

Miami

Thu 12/11

08:00-09:35

2 stops33h 35m

$1,341

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Tue 25/8

10:20-17:35

1 stop21h 15m

Miami

Tue 1/9

16:58-06:55

1 stop23h 57m

$1,438
Fastest return journey

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Tue 8/9

09:15-17:36

1 stop22h 21m

Miami

Mon 28/9

18:46-06:50

1 stop22h 04m

$1,595

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Thu 19/11

10:40-23:18

2 stops28h 38m

Miami

Wed 2/12

18:29-08:30

1 stop22h 01m

$1,668

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Tue 17/11

10:40-17:19

1 stop22h 39m

Miami

Sun 29/11

18:29-08:30

1 stop22h 01m

$1,668

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Fri 25/12

10:40-17:41

1 stop23h 01m

Miami

Mon 25/1

08:00-08:30

2 stops32h 30m

$1,668

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Sun 15/11

10:40-17:19

1 stop22h 39m

Miami

Sun 29/11

18:29-08:30

1 stop22h 01m

$1,668

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Thu 24/12

14:15-10:23

2 stops36h 08m

Miami

Sun 24/1

08:00-08:30

1 stop32h 30m

$2,136

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Wed 9/12

11:20-21:50

2 stops26h 30m

Miami

Tue 29/12

08:45-09:20

2 stops32h 35m

$2,230
Cheapest one-way
Fastest single journey

SydneyMiami

SYD Sydney Kingsford Smith - MIA Miami

SYDMIA

Sydney Kingsford Smith

Thu 27/8

10:20-19:26

1 stop23h 06m

$890

Flights are sorted by cheapest return flights first.

Deals found on 8/8

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Sydney to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Sydney with our price prediction graph.
Estimated return 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 Sydney to Key Largo

How much does it cost for a return flight from Sydney to Key Largo?

Airfare is below average for this route at the moment.
Sydney to Key Largo flights typically cost between $1,622 and $2,358 in September.
The cheapest return price found within the last 5 days was $1,266 on Multiple Airlines (8 Sept–14 Sept).

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 10 August 2026.
Read reviews from past customers who have flown with Air New Zealand,Qantas Airways, andUnited Airlines from Sydney to Key Largo. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
659 reviews
Check prices

Entertainment

7.4

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Air New Zealand
8.0
Very Good
659 reviews
Air New Zealand
8.0
Very Good
659 reviews
Check prices

Entertainment

7.4

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Qantas Airways
7.5
Good
1,081 reviews
Air New Zealand
8.0
Very Good
659 reviews
Check prices

Entertainment

7.4

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
United Airlines
7.4
Good
10,099 reviews
Air New Zealand
8.0
Very Good
659 reviews
Check prices

Entertainment

7.4

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
American Airlines
7.1
Good
11,896 reviews
Air New Zealand
8.0
Very Good
659 reviews
Check prices

Entertainment

7.4

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Air Canada
7.1
Good
11,457 reviews
Air New Zealand
8.0
Very Good
659 reviews
Check prices

Entertainment

7.4

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Related info for your journey

Find useful and relevant information for your journey from Sydney 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 Sydney to Key Largo?

    Sydney Kingsford Smith (SYD) is the airport you will fly out of if you book a flight from Sydney to Key Largo. You should not have trouble finding flights to Key Largo from Kingsford Smith; the airport handles an average of 0 outbound flights to Key Largo per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Sydney airport to Key Largo. It is only a 7.5 km journey to Kingsford Smith (SYD) from Sydney’s city centre.

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

    Air Canada, United Airlines, and Delta can get you from Sydney to Key Largo in just under 21h 15m. Your travel time can differ by up to 19h 41m. There are 15012 km between Sydney and Key Largo. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The cheapest airline one-way is Air New Zealand, with whom users have recently found tickets for as low as $806. However, be on the lookout for offers from United Airlines and Qantas Airways, as they are both options that can get you from Sydney to Key Largo for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Sydney 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Sydney to Key Largo

Discover the top 6 airlines that operate flights from Sydney 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 647,157 searches. Data last updated 10 August 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,121Average$1,742FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,238Average$1,356FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,438Average$1,623FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Qantas AirwaysCheapest$1,543Average$1,847FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,568Average$2,018FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$1,694Average$2,053FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Sydney to Key Largo?

Cheapflights helps you search for flights from Sydney to Key Largo via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Sydney to Key Largo?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Sydney to Key Largo.

Can Cheapflights find flights from Sydney to Key Largo with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Sydney to Key Largo flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Sydney to Key Largo become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Key Largo from Sydney today and book when prices fit your budget.

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