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Cheap flights from Ontario to Key Largo from C$ 209

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MIA
16 Oct — 23 Oct1
1 adult
1 adult, Economy

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 16 September 2025.

Round-trip from

C$ 320

One-way from

C$ 209

Popular in

December

Cheapest in

January

Average price

C$ 468
Porter Airlines
  • Porter Airlines
  • 11/2-18/2
  • Nonstop
  • 6h 49m total
  • Ontario to Key Largo
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Porter Airlines
  • Porter Airlines
  • 1/11
  • Nonstop
  • 3h 29m total
  • Ontario to Key Largo
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 17 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 September 2025
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Find flight deals from Ontario to Key Largo

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 16 September 2025.

Sun 2/114:00 p.m.YYZ - MIA
1 stop19h 45mMultiple Airlines
Mon 10/1111:28 a.m.MIA - YYZ
1 stop9h 39mMultiple Airlines
Deal found 14/9C$ 327
Fri 31/109:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Fri 7/112:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 14/9C$ 332
Sun 26/109:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Sat 1/112:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 14/9C$ 337
Wed 29/103:30 p.m.YTZ - MIA
1 stop6h 59mAir Canada
Wed 5/118:00 a.m.MIA - YTZ
2 stops10h 13mAir Canada
Deal found 14/9C$ 338
Sun 9/119:40 a.m.YYZ - MIA
Nonstop3h 29mMultiple Airlines
Mon 10/1111:28 a.m.MIA - YYZ
1 stop9h 39mMultiple Airlines
Deal found 14/9C$ 340
Fri 31/109:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Mon 3/112:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 14/9C$ 341
Fri 31/109:40 a.m.YYZ - MIA
Nonstop3h 29mPorter Airlines
Sun 2/112:10 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 15/9C$ 343
Fri 31/109:40 a.m.YYZ - MIA
Nonstop3h 29mMultiple Airlines
Mon 3/116:00 a.m.MIA - YYZ
1 stop15h 07mMultiple Airlines
Deal found 14/9C$ 344
Sun 26/102:00 p.m.YYZ - MIA
1 stop8h 29mAir Canada
Sat 1/119:05 p.m.MIA - YYZ
Nonstop3h 21mAir Canada
Deal found 15/9C$ 347
Mon 3/119:40 a.m.YYZ - MIA
Nonstop3h 29mMultiple Airlines
Fri 7/1111:28 a.m.MIA - YYZ
1 stop9h 39mMultiple Airlines
Deal found 14/9C$ 348
Fri 31/109:40 a.m.YYZ - MIA
Nonstop3h 29mMultiple Airlines
Fri 7/1111:28 a.m.MIA - YYZ
1 stop9h 39mMultiple Airlines
Deal found 14/9C$ 351
Mon 22/910:38 a.m.YUL - MIA
1 stop5h 38mAmerican Airlines
Tue 23/97:06 a.m.MIA - YUL
2 stops8h 27mAmerican Airlines
Deal found 15/9C$ 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 16 September 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

YTZ - MIA

YTZMIA

Toronto Island

Sun 25/1

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

1 stop6h 59m

Miami

Thu 29/1

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

1 stop6h 55m

C$ 376

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 9/3

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

1 stop6h 59m

Miami

Tue 17/3

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

1 stop8h 55m

C$ 383

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Thu 8/1

6:10 a.m.-6:25 p.m.

1 stop12h 15m

Miami

Wed 14/1

8:00 a.m.-2:40 p.m.

1 stop6h 40m

C$ 388

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Fri 5/12

10:45 a.m.-11:56 p.m.

1 stop13h 11m

Miami

Mon 8/12

9:05 p.m.-12:26 a.m.

Nonstop3h 21m

C$ 391

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Mon 12/1

3:30 p.m.-10:15 p.m.

1 stop6h 45m

Miami

Fri 16/1

7:15 a.m.-1:43 p.m.

1 stop6h 28m

C$ 394

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Tue 28/10

10:25 a.m.-10:29 p.m.

2 stops12h 04m

Miami

Wed 5/11

12:45 p.m.-9:35 p.m.

1 stop8h 50m

C$ 394

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Sat 31/1

7:30 a.m.-2:38 p.m.

1 stop7h 08m

Miami

Sun 8/2

9:00 a.m.-7:45 p.m.

1 stop10h 45m

C$ 399

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Fri 31/10

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

Nonstop3h 29m

Miami

Fri 7/11

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

Nonstop3h 20m

C$ 403

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Tue 2/12

10:25 a.m.-10:29 p.m.

2 stops12h 04m

Miami

Wed 10/12

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

1 stop6h 55m

C$ 405

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Wed 3/12

10:25 a.m.-10:29 p.m.

2 stops12h 04m

Miami

Tue 9/12

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

1 stop6h 55m

C$ 405

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

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, April is the cheapest month in which you can book a flight from Region of Ontario to Key Largo (average of C$ 251). Flying from Region of Ontario to Key Largo in August is currently the most expensive (average of C$ 369). 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 16 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Key Largo as you normally would.

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 16 September 2025.

The most flights from CAON to KE9 are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).

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$ 403, Air Canada 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$ 218 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on American Airlines and Air Transat, with prices starting from C$ 231 and C$ 235, 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 (83%), American Airlines (67%) or GOL (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$ 230. While the most popular route (Toronto Pearson Intl - Miami) can be booked for C$ 320 on average, our data indicates C$ 656 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, April is the cheapest month in which you can book a flight from Region of Ontario to Key Largo (average of C$ 251). Flying from Region of Ontario to Key Largo in August is currently the most expensive (average of C$ 369). 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 16 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 114AverageC$ 267FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
Porter AirlinesCheapestC$ 128AverageC$ 390FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
WestJetCheapestC$ 163AverageC$ 608FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 193AverageC$ 524FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 200AverageC$ 551FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 201AverageC$ 391FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 248AverageC$ 618FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 269AverageC$ 474FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
WestJet EncoreCheapestC$ 521AverageC$ 792FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
APG AirlinesCheapestC$ 626AverageC$ 674FlexibilityNo 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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