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Cheap flights from Ontario to Key Largo from C$ 221

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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MIA
2 Dec — 9 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Key Largo

Keep the following information in mind while searching for Ontario to Key Largo flight deals. Data was last updated 2 November 2025.

Round-trip from

C$ 335

One-way from

C$ 221

Popular in

December

Cheapest in

January

Average price

C$ 485
Air Transat
  • Air Transat
  • 18/1-23/1
  • Nonstop
  • 6h 49m total
  • Ontario to Key Largo
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Air Transat
  • Air Transat
  • 11/1
  • Nonstop
  • 3h 29m total
  • Ontario to Key Largo
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Ontario to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Key Largo
Explore the most affordable flight options available from Ontario to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 November 2025.

Sun 7/129:15 a.m.YTZ - MIA
1 stop9h 54mMultiple Airlines
Thu 15/112:10 p.m.MIA - YTZ
1 stop25h 32mMultiple Airlines
Deal found 1/11C$ 340
Mon 8/128:55 a.m.YTZ - MIA
1 stop9h 50mMultiple Airlines
Thu 15/112:10 p.m.MIA - YTZ
1 stop25h 32mMultiple Airlines
Deal found 1/11C$ 354
Mon 24/119:40 a.m.YYZ - MIA
Nonstop3h 29mAir Transat
Fri 28/112:10 p.m.MIA - YYZ
Nonstop3h 20mAir Transat
Deal found 1/11C$ 356
Wed 17/129:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Mon 22/122:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 1/11C$ 357
Sat 13/1211:00 a.m.YTZ - MIA
1 stop8h 09mMultiple Airlines
Thu 15/112:10 p.m.MIA - YTZ
1 stop25h 32mMultiple Airlines
Deal found 1/11C$ 360
Wed 31/129:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Wed 7/12:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 1/11C$ 363
Mon 15/129:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Mon 22/122:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 31/10C$ 366
Wed 17/129:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Wed 24/122:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 1/11C$ 367
Tue 30/129:40 a.m.YYZ - MIA
Nonstop3h 29mAir Transat
Wed 14/12:10 p.m.MIA - YYZ
Nonstop3h 20mAir Transat
Deal found 30/10C$ 371
Wed 17/129:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Mon 29/122:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 30/10C$ 373
Wed 17/129:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Thu 25/122:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 1/11C$ 375
Sun 23/119:40 a.m.YYZ - MIA
Nonstop3h 29mAir Transat
Fri 28/112:10 p.m.MIA - YYZ
Nonstop3h 20mAir Transat
Deal found 1/11C$ 377

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario 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 2 November 2025.
Use the filters below to find and compare flights from Ontario to Key Largo that are best for you.

Fly from

Ontario

Fly to

Key Largo

Route

Depart

Return

Price

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Sun 22/3

9:40 a.m.-1:09 p.m.

Nonstop3h 29m

Miami

Tue 31/3

2:10 p.m.-5:30 p.m.

Nonstop3h 20m

C$ 405

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Fri 30/1

7:00 a.m.-1:55 p.m.

1 stop6h 55m

Miami

Fri 27/3

2:55 p.m.-10:03 p.m.

1 stop7h 08m

C$ 429

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Tue 6/1

6:05 a.m.-12:33 p.m.

1 stop6h 28m

Miami

Sat 10/1

8:05 a.m.-4:12 p.m.

1 stop8h 07m

C$ 462

OttawaMiami

YOW - MIA

YOWMIA

Ottawa

Sat 24/1

10:10 a.m.-1:55 p.m.

Nonstop3h 45m

Miami

Mon 2/2

2:55 p.m.-6:35 p.m.

Nonstop3h 40m

C$ 462

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Sat 14/2

7:00 a.m.-1:55 p.m.

1 stop6h 55m

Miami

Mon 23/2

2:55 p.m.-10:03 p.m.

1 stop7h 08m

C$ 465

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 8/12

3:30 p.m.-10:29 p.m.

1 stop6h 59m

Miami

Tue 13/1

12:25 p.m.-7:55 p.m.

1 stop7h 30m

C$ 471

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Sun 7/12

3:30 p.m.-10:29 p.m.

1 stop6h 59m

Miami

Fri 12/12

8:00 a.m.-4:55 p.m.

1 stop8h 55m

C$ 471

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 23/3

10:45 a.m.-5:29 p.m.

1 stop6h 44m

Miami

Wed 25/3

8:00 a.m.-9:15 p.m.

2 stops13h 15m

C$ 471

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Wed 14/1

3:30 p.m.-10:29 p.m.

1 stop6h 59m

Miami

Tue 20/1

8:00 a.m.-2:55 p.m.

1 stop6h 55m

C$ 472

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 9/2

7:00 a.m.-1:55 p.m.

1 stop6h 55m

Miami

Fri 13/2

2:55 p.m.-10:03 p.m.

1 stop7h 08m

C$ 472

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

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

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

What is the cheapest month to book a flight from Region of Ontario to Key Largo?

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Key Largo (average of C$ 91). Flying from Region of Ontario to Key Largo in August is currently the most expensive (average of C$ 177). 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 ON to KE9?

Find hourly flight availability from Ontario to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 November 2025.

One of the essential ways to save on airfare from Region of Ontario to Key Largo is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 7% on airfare.

What is the cheapest day to fly from Region of Ontario to Key Largo?

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

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

Weekly flight availability from Region of Ontario to Key Largo

Explore weekly flight availability from Ontario to Key Largo. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 2 November 2025.

The most flights from CAON to KE9 are scheduled on a Sunday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from Region of Ontario to Key Largo?

Related info for your journey

Find useful and relevant information for your journey from Ontario to Key Largo. 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 Region of Ontario to Key Largo?

    For as low as C$ 405, Air Transat can have you in Key Largo from Region of Ontario in 3h 29m. There are 1988 km between Region of Ontario and Key Largo. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Region of Ontario to Key Largo one-way?

    C$ 228 is the cheapest one-way deal found within the past few days, from Air Transat. You may also be able to find cheap deals on Porter Airlines and Air Canada, with prices starting from C$ 247 and C$ 277, respectively.

  • What are the most popular routes from Region of Ontario to Key Largo?

    The most popular route from Region of Ontario to Key Largo is Toronto Pearson Intl - Miami. You may also consider Montreal Pierre Elliott Trudeau Intl - Miami or Toronto Island - Miami.

  • What are the most reliable airlines from Region of Ontario to Key Largo?

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to Key Largo consider choosing British Airways (82%), Qatar Airways (71%) or Air Canada (67%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Region of Ontario to Key Largo?

    Looking at all options, your cheapest flight can be booked for C$ 193. While the most popular route (Toronto Pearson Intl - Miami) can be booked for C$ 335 on average, our data indicates C$ 527 when flying from Region of Ontario to Key Largo.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario 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 Region of Ontario to Key Largo?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Key Largo (average of C$ 91). Flying from Region of Ontario to Key Largo in August is currently the most expensive (average of C$ 177). 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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Alternative routes for Ontario to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Ontario to Key Largo

Discover the top 10 airlines that operate flights from Ontario 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 2 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 103AverageC$ 389FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Flair AirlinesCheapestC$ 115AverageC$ 254FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
American AirlinesCheapestC$ 195AverageC$ 534FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 201AverageC$ 398FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 204AverageC$ 572FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 206AverageC$ 586FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 250AverageC$ 631FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 274AverageC$ 499FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
WestJet EncoreCheapestC$ 528AverageC$ 803FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
APG AirlinesCheapestC$ 635AverageC$ 684FlexibilityNo cancel feeOn-timeN/A
Search APG 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 Ontario to Key Largo?

Cheapflights helps you search for flights from Ontario 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 Ontario to Key Largo?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Key Largo from Ontario.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to Key Largo, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on Ontario to Key Largo flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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