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Cheap flights from Belfast Intl Airport to Key Largo from £295

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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — MIA
12 Sep — 19 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Key Largo
Explore the most affordable flight options available from Belfast Intl to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 August 2026.

Sat 26/908:45 -
3 stops40h 00m
Sat 3/1021:35 -
2 stops18h 55m
Deal found 12/8£624
Thu 17/921:10 -
2 stops26h 35m
Thu 24/921:30 -
2 stops18h 05m
Deal found 11/8£640
Sun 6/907:00 -
2 stops20h 20m
Sun 13/900:30 -
2 stops25h 55m
Deal found 9/8£651
Thu 3/907:00 -
3 stops41h 45m
Sat 12/923:05 -
2 stops17h 25m
Deal found 8/8£655
Thu 24/906:10 -
2 stops17h 35m
Thu 1/1021:30 -
2 stops18h 05m
Deal found 10/8£663

Find flight deals from Belfast Intl to Key Largo

Keep the following information in mind while searching for Belfast Intl to Key Largo flight deals. Data was last updated 13 August 2026.

Round-trip from

£624

One-way from

£295

Popular in

December

Cheapest in

January

Average price

£811
26/9-3/10
  • 26/9-3/10
  • 5 total stops
  • 58h 55m total
  • Belfast to Key Largo
Search Deals
8/10
  • 8/10
  • 3 total stops
  • 36h 00m total
  • Belfast to Key Largo
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£34 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 Belfast Intl 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 858,174 searches. Data last updated 13 August 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Thu 17/9

21:10-18:45

2 stops26h 35m

Miami

Thu 24/9

21:30-20:35

2 stops18h 05m

£640

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Sat 26/9

08:45-19:45

3 stops40h 00m

Miami

Sat 3/10

12:10-22:40

3 stops29h 30m

£643

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Sun 6/9

07:00-22:20

2 stops20h 20m

Miami

Sun 13/9

00:30-07:25

2 stops25h 55m

£651

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Thu 3/9

07:00-19:45

3 stops41h 45m

Miami

Sat 12/9

23:05-21:30

2 stops17h 25m

£655
Fastest return journey

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Wed 23/9

06:15-17:50

1 stop16h 35m

Miami

Wed 30/9

12:03-13:45

2 stops20h 42m

£722
Cheapest one-way

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Thu 8/10

12:45-19:45

3 stops36h 00m

£295
Fastest single journey

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Fri 9/10

17:05-19:20

2 stops31h 15m

£323

BelfastMiami

BFS Belfast Intl - MIA Miami

BFSMIA

Belfast Intl

Thu 17/9

06:20-19:45

2 stops42h 25m

£350

Flights are sorted by cheapest return flights first.

Deals found on 8/8

Sorted by cheapest first

Best time to book a flight from Belfast Intl to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Belfast Intl 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 Belfast Intl Airport to Key Largo

How much does it cost for a return flight from Belfast Intl Airport to Key Largo?

Airfare is below average for this route at the moment.
Belfast Intl Airport to Key Largo flights typically cost between £697 and £1,004 in September.
The cheapest return price found within the last 5 days was £624 on Multiple Airlines (26 Sept–3 Oct).

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 13 August 2026.
Read through reviews of airlines operating flights from Belfast Intl Airport to Key Largo, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,161 reviews
Check prices

Comfort

6.8

Crew

7.7

Overall

6.7

Boarding

7.0

Food

6.4

Entertainment

6.5

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
8,161 reviews
British Airways
6.7
Okay
8,161 reviews
Check prices

Comfort

6.8

Crew

7.7

Overall

6.7

Boarding

7.0

Food

6.4

Entertainment

6.5

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

Related info for your journey

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl 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.

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Belfast Intl to Key Largo

Discover the top airline that operate flights from Belfast Intl 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 858,174 searches. Data last updated 13 August 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£500Average£717FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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

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

Need flexible booking options for your flight to Key Largo from Belfast Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Not ready to book yet? You can track prices for flights from Belfast Intl to Key Largo on Cheapflights with our Price Alert feature and get notified when better prices are available.

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