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Cheap flights from Sydney to Key Largo from $923

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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — MIA
5 Feb — 12 Feb1
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 6 January 2026.

Mon 19/110:40SYD - MIA
2 stops26h 04mDelta
Mon 2/207:50MIA - SYD
1 stop32h 40mDelta
Deal found 4/1$1,461
Mon 2/211:45SYD - MIA
2 stops26h 09mAir New Zealand
Mon 9/209:05MIA - SYD
2 stops31h 40mAir New Zealand
Deal found 3/1$1,594
Sun 1/211:45SYD - MIA
2 stops26h 09mAir New Zealand
Mon 9/209:05MIA - SYD
2 stops31h 40mAir New Zealand
Deal found 4/1$1,666
Wed 18/209:55SYD - MIA
2 stops28h 04mAir New Zealand
Wed 25/216:45MIA - SYD
2 stops25h 45mAir New Zealand
Deal found 4/1$1,699
Fri 28/807:50SYD - MIA
2 stops28h 00mAir New Zealand
Sat 5/917:00MIA - SYD
2 stops25h 45mAir New Zealand
Deal found 4/1$1,771
Mon 4/509:55SYD - MIA
2 stops26h 32mAir New Zealand
Thu 7/512:50MIA - SYD
2 stops29h 55mAir New Zealand
Deal found 3/1$1,853
Mon 9/309:55SYD - MIA
2 stops27h 20mAir New Zealand
Mon 16/309:00MIA - SYD
2 stops32h 45mAir New Zealand
Deal found 3/1$1,940
Mon 19/109:45SYD - MIA
2 stops43h 36mMultiple Airlines
Mon 2/205:30MIA - SYD
2 stops33h 55mMultiple Airlines
Deal found 5/1$1,950
Wed 18/211:20SYD - MIA
1 stop22h 19mAir Canada
Wed 25/208:00MIA - SYD
2 stops33h 35mAir Canada
Deal found 4/1$1,971
Mon 2/211:20SYD - MIA
1 stop22h 19mAir Canada
Mon 9/208:00MIA - SYD
2 stops33h 35mAir Canada
Deal found 3/1$1,977

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 6 January 2026.

Round-trip from

$1,461

One-way from

$923

Popular in

January

Cheapest in

February

Average price

$2,582
Delta
  • Delta
  • 19/1-2/2
  • 3 total stops
  • 58h 44m total
  • Sydney to Key Largo
Search Deals
Delta
  • Delta
  • 4/3
  • 2 total stops
  • 23h 41m total
  • Sydney to Key Largo
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($294 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($74 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 6 January 2026.
Use the filters below to find and compare flights from Sydney to Key Largo that are best for you.

Fly from

Sydney

Fly to

Key Largo

Route

Depart

Return

Price

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Mon 19/1

10:40-20:44

2 stops26h 04m

Miami

Mon 2/2

07:50-08:30

1 stop32h 40m

$1,461

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Sun 1/2

11:45-21:54

2 stops26h 09m

Miami

Mon 9/2

09:05-08:45

2 stops31h 40m

$1,666

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Mon 4/5

09:55-22:27

2 stops26h 32m

Miami

Thu 7/5

12:50-08:45

2 stops29h 55m

$1,853

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Mon 9/3

11:45-22:15

2 stops25h 30m

Miami

Mon 16/3

09:00-08:45

2 stops32h 45m

$1,941

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Wed 18/2

11:20-17:39

1 stop22h 19m

Miami

Wed 25/2

08:00-09:35

2 stops33h 35m

$1,971

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Mon 2/2

11:20-17:39

1 stop22h 19m

Miami

Mon 9/2

08:00-09:35

2 stops33h 35m

$1,977

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Mon 9/3

11:20-11:39

2 stops39h 19m

Miami

Mon 16/3

08:00-08:35

3 stops33h 35m

$1,993

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Tue 3/2

10:40-17:48

1 stop23h 08m

$923

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Wed 15/4

09:15-17:14

1 stop21h 59m

$923

SydneyMiami

SYD - MIA

SYDMIA

Sydney Kingsford Smith

Thu 5/3

14:15-09:24

2 stops35h 09m

$923

Flights are sorted by cheapest return flights first.

Deals found on 3/1

Showing 1-10 of 12 results
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 far ahead should I book a flight from Sydney to Key Largo?

Use this chart to determine the optimal time to book a return flight from Sydney to Key Largo. Price data was last updated on 2 January 2026.

The price you pay for your flight from Sydney to Key Largo may vary depending on when you book. For the best chance of a lower fare, look to book 72 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, October is the cheapest month in which you can book a flight from Sydney to Key Largo (average of $1,065). Flying from Sydney to Key Largo in April is currently the most expensive (average of $1,599). 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.

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 6 January 2026.
Read reviews from past customers who have flown with Air New Zealand, Delta, andQantas Airways 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
565 reviews
Check prices

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air New Zealand
8.0
Very Good
565 reviews
Air New Zealand
8.0
Very Good
565 reviews
Check prices

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Delta
7.9
Good
8,018 reviews
Air New Zealand
8.0
Very Good
565 reviews
Check prices

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Qantas Airways
7.5
Good
967 reviews
Air New Zealand
8.0
Very Good
565 reviews
Check prices

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
United Airlines
7.4
Good
9,134 reviews
Air New Zealand
8.0
Very Good
565 reviews
Check prices

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air Canada
7.1
Good
10,597 reviews
Air New Zealand
8.0
Very Good
565 reviews
Check prices

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………

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 7 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?

    Delta and Air New Zealand can get you from Sydney to Key Largo in just under 26h 04m. Your travel time can differ by up to 05m. 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 Delta, with whom users have recently found tickets for as low as $470. However, be on the lookout for offers from Air New Zealand and Air Canada, 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.

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

    Currently, October is the cheapest month in which you can book a flight from Sydney to Key Largo (average of $1,065). Flying from Sydney to Key Largo in April is currently the most expensive (average of $1,599). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 7 airlines flying from Sydney to Key Largo

Discover the top 7 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 6 January 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$1,117Average$1,176FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air New ZealandCheapest$1,137Average$1,759FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,196Average$1,939FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,214Average$1,861FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,451Average$2,403FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Virgin AustraliaCheapest$1,521Average$2,890FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
American AirlinesCheapest$1,656Average$2,117FlexibilityNo cancel feeOn-time71%
Search American Airlines 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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