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Cheap flights from London, ON to Key Largo from C$ 345

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 22/3. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — MIA
8 Mar — 15 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from London to Key Largo
Explore the most affordable flight options available from London to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 February 2026.

Tue 10/39:40 a.m.
YXU
-
MIA
1 stop5h 35m
Air Canada
Thu 12/38:00 a.m.
MIA
-
YXU
2 stops13h 21m
Air Canada
Deal found 5/2C$ 632
Sun 22/39:40 a.m.
YXU
-
MIA
1 stop5h 35m
Air Canada
Wed 8/48:00 a.m.
MIA
-
YXU
2 stops9h 03m
Air Canada
Deal found 6/2C$ 637
Sun 22/35:10 a.m.
YXU
-
MIA
2 stops12h 19m
Air Canada
Thu 9/48:00 a.m.
MIA
-
YXU
2 stops13h 18m
Air Canada
Deal found 6/2C$ 650
Sun 22/35:10 a.m.
YXU
-
MIA
1 stop5h 30m
Air Canada
Fri 10/49:05 p.m.
MIA
-
YXU
1 stop11h 38m
Air Canada
Deal found 6/2C$ 660
Sun 22/35:10 a.m.
YXU
-
MIA
2 stops12h 19m
Air Canada
Mon 13/49:05 p.m.
MIA
-
YXU
1 stop11h 38m
Air Canada
Deal found 6/2C$ 671
Mon 2/35:40 p.m.
YXU
-
MIA
1 stop6h 36m
Air Canada
Thu 26/312:20 p.m.
MIA
-
YXU
1 stop9h 01m
Air Canada
Deal found 6/2C$ 673
Mon 2/39:25 a.m.
YXU
-
MIA
1 stop5h 50m
Air Canada
Wed 11/37:25 a.m.
MIA
-
YXU
1 stop9h 40m
Air Canada
Deal found 3/2C$ 674
Mon 23/35:40 p.m.
YXU
-
MIA
1 stop6h 36m
Air Canada
Mon 30/38:00 a.m.
MIA
-
YXU
2 stops9h 03m
Air Canada
Deal found 5/2C$ 678
Mon 16/35:40 p.m.
YXU
-
MIA
1 stop6h 36m
Air Canada
Fri 20/37:25 a.m.
MIA
-
YXU
1 stop9h 40m
Air Canada
Deal found 5/2C$ 688
Sun 22/35:10 a.m.
YXU
-
MIA
2 stops12h 19m
Air Canada
Sat 11/48:00 a.m.
MIA
-
YXU
2 stops13h 18m
Air Canada
Deal found 6/2C$ 689

Find flight deals from London to Key Largo

Keep the following information in mind while searching for London to Key Largo flight deals. Data was last updated 6 February 2026.

Round-trip from

C$ 632

One-way from

C$ 345

Popular in

December

Cheapest in

July

Average price

C$ 674
Air Canada
  • Air Canada
  • 10/3-12/3
  • 3 total stops
  • 18h 56m total
  • London to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 22/3
  • 1 total stop
  • 6h 36m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 99 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 629,999 searches. Data last updated 6 February 2026.
Use the filters below to find and compare flights from London to Key Largo that are best for you.

Fly from

London

Fly to

Key Largo

Route

Depart

Return

Price

LondonMiami

YXU - MIA

YXUMIA

London

Tue 10/3

5:10 a.m.-11:25 a.m.

1 stop6h 15m

Miami

Thu 12/3

8:00 a.m.-9:21 p.m.

2 stops13h 21m

C$ 633

LondonMiami

YXU - MIA

YXUMIA

London

Mon 2/3

5:10 a.m.-11:25 a.m.

1 stop6h 15m

Miami

Thu 26/3

8:00 a.m.-5:05 p.m.

2 stops9h 05m

C$ 650

LondonMiami

YXU - MIA

YXUMIA

London

Tue 24/3

9:40 a.m.-3:15 p.m.

1 stop5h 35m

Miami

Sun 12/4

9:05 p.m.-8:43 a.m.

1 stop11h 38m

C$ 660

LondonMiami

YXU - MIA

YXUMIA

London

Mon 23/3

5:10 a.m.-11:25 a.m.

1 stop6h 15m

Miami

Wed 8/4

9:05 p.m.-8:43 a.m.

1 stop11h 38m

C$ 660

LondonMiami

YXU - MIA

YXUMIA

London

Tue 10/3

5:10 a.m.-11:25 a.m.

1 stop6h 15m

Miami

Fri 13/3

7:25 a.m.-5:05 p.m.

1 stop9h 40m

C$ 660

LondonMiami

YXU - MIA

YXUMIA

London

Mon 23/3

5:40 p.m.-12:16 a.m.

1 stop6h 36m

Miami

Fri 10/4

9:05 p.m.-8:43 a.m.

1 stop11h 38m

C$ 660

LondonMiami

YXU - MIA

YXUMIA

London

Mon 23/3

9:40 a.m.-3:15 p.m.

1 stop5h 35m

Miami

Sat 11/4

9:05 p.m.-8:43 a.m.

1 stop11h 38m

C$ 660

LondonMiami

YXU - MIA

YXUMIA

London

Tue 24/3

5:10 a.m.-11:25 a.m.

1 stop6h 15m

Miami

Mon 13/4

9:05 p.m.-8:43 a.m.

1 stop11h 38m

C$ 660

LondonMiami

YXU - MIA

YXUMIA

London

Sun 22/3

5:40 p.m.-12:16 a.m.

1 stop6h 36m

Miami

Thu 9/4

12:20 p.m.-9:18 p.m.

1 stop8h 58m

C$ 660

LondonMiami

YXU - MIA

YXUMIA

London

Mon 13/7

6:00 a.m.-12:13 p.m.

1 stop6h 13m

Miami

Sun 26/7

9:45 p.m.-11:45 a.m.

1 stop14h 00m

C$ 660

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

Showing 1-10 of 20 results
1
2

Best time to book a flight from London to Key Largo

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

What is the cheapest month to book a flight from London, Ontario to Key Largo?

Currently, February is the cheapest month in which you can book a flight from London, Ontario to Key Largo (average of C$ 101). Flying from London, Ontario to Key Largo in December is currently the most expensive (average of C$ 204). 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 February 2026.
Check out reviews from past customers who have flown with Air Canada from London to Key Largo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,697 reviews
Check prices

Boarding

7.3

Comfort

7.1

Crew

7.8

Food

6.3

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,697 reviews
Air Canada
7.1
Good
10,697 reviews
Check prices

Boarding

7.3

Comfort

7.1

Crew

7.8

Food

6.3

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

Related info for your journey

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

    London (YXU), located 8.6 km from the city centre, is the airport you fly out of when you book flights from London to Key Largo. 2 airlines have flights from London to Key Largo on a regular basis. Booking flights from London to Key Largo should not be difficult; the airport handles an average of 0 outbound flights to Key Largo per day.

  • How long is the flight from London, Ontario to Key Largo?

    A quick flight from London, Ontario to Key Largo can take about 6h 15m. Air Canada provides one of the quickest options available for as low as C$ 633. London, Ontario and Key Largo are separated by a distance of 1917 km.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 London, Ontario to Key Largo?

    Currently, February is the cheapest month in which you can book a flight from London, Ontario to Key Largo (average of C$ 101). Flying from London, Ontario to Key Largo in December is currently the most expensive (average of C$ 204). 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 2 airlines flying from London to Key Largo

Discover the top 2 airlines that operate flights from London 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 629,999 searches. Data last updated 6 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 365AverageC$ 636FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 379AverageC$ 566FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to Key Largo. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights simply makes it quick and affordable to book flights from London to Key Largo by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes! Cheapflights helps users easily find flights from London to Key Largo with no change fees.

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

Of course! You can now track prices for flights from London to Key Largo and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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