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Cheap flights from Ontario to Key Largo from C$ 242

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 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MIA
4 Sep — 11 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 5 August 2026.

Tue 15/98:55 a.m. -
Nonstop3h 19m
Tue 22/91:10 p.m. -
Nonstop3h 09m
Deal found 1/8C$ 356
Wed 16/98:55 a.m. -
Nonstop3h 19m
Wed 23/91:10 p.m. -
Nonstop3h 09m
Deal found 31/7C$ 363
Sun 23/86:30 p.m. -
Nonstop3h 41m
Tue 1/98:15 a.m. -
Nonstop3h 28m
Deal found 31/7C$ 380
Sun 4/108:55 a.m. -
Nonstop3h 19m
Sat 10/109:45 p.m. -
Nonstop3h 11m
Deal found 5/8C$ 381
Thu 3/98:55 a.m. -
Nonstop3h 18m
Thu 3/99:45 p.m. -
Nonstop3h 14m
Deal found 31/7C$ 384
Tue 1/98:55 a.m. -
Nonstop3h 18m
Tue 8/91:15 p.m. -
Nonstop3h 09m
Deal found 31/7C$ 385
Mon 24/85:30 p.m. -
Nonstop3h 18m
Thu 27/89:45 p.m. -
Nonstop3h 14m
Deal found 31/7C$ 387
Sun 6/91:20 p.m. -
Nonstop3h 41m
Fri 11/97:55 a.m. -
Nonstop3h 33m
Deal found 3/8C$ 391
Sun 30/89:45 a.m. -
2 stops11h 03m
Tue 8/97:55 a.m. -
Nonstop3h 33m
Deal found 3/8C$ 394
Tue 15/95:00 a.m. -
1 stop7h 14m
Tue 22/97:55 a.m. -
Nonstop3h 33m
Deal found 1/8C$ 403
Wed 19/86:30 p.m. -
Nonstop3h 41m
Wed 26/88:15 a.m. -
Nonstop3h 28m
Deal found 2/8C$ 408
Tue 10/114:30 p.m. -
1 stop6h 41m
Thu 19/118:00 a.m. -
1 stop7h 56m
Deal found 2/8C$ 408

Find 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 5 August 2026.

Round-trip from

C$ 356

One-way from

C$ 242

Popular in

August

Cheapest in

June

Average price

C$ 631
Air Canada
  • Air Canada
  • 15/9-22/9
  • Nonstop
  • 6h 28m total
  • Ontario to Key Largo
Search Deals
Porter Airlines
  • Porter Airlines
  • 26/10
  • Nonstop
  • 3h 30m total
  • Ontario to Key Largo
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 5 August 2026.
Use the filters below to find and compare flights from Ontario to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Tue 22/9

7:45 a.m.-1:05 p.m.

1 stop5h 20m

Miami

Tue 29/9

7:18 a.m.-12:19 p.m.

1 stop5h 01m

C$ 437

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Wed 14/10

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

1 stop6h 12m

Miami

Tue 27/10

8:00 a.m.-1:36 p.m.

1 stop5h 36m

C$ 439

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Wed 19/8

6:00 a.m.-2:24 p.m.

1 stop8h 24m

Miami

Sun 23/8

7:00 a.m.-12:23 p.m.

1 stop5h 23m

C$ 439

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 29/8

7:00 a.m.-2:54 p.m.

1 stop7h 54m

Miami

Tue 1/9

6:03 p.m.-11:52 p.m.

1 stop5h 49m

C$ 460

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Fri 23/10

9:00 p.m.-11:50 a.m.

1 stop14h 50m

Miami

Tue 27/10

8:00 a.m.-4:46 p.m.

1 stop8h 46m

C$ 468

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Sat 19/9

7:30 a.m.-2:51 p.m.

1 stop7h 21m

Miami

Sat 3/10

7:59 p.m.-9:19 a.m.

1 stop13h 20m

C$ 478

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Wed 9/9

9:44 a.m.-6:52 p.m.

2 stops9h 08m

Miami

Tue 15/9

11:26 a.m.-7:00 p.m.

1 stop7h 34m

C$ 481

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Fri 23/10

9:00 p.m.-11:50 a.m.

1 stop14h 50m

Miami

Sat 31/10

7:00 a.m.-4:47 p.m.

1 stop9h 47m

C$ 481

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Wed 21/10

8:50 a.m.-2:59 p.m.

1 stop6h 09m

Miami

Sun 25/10

9:00 a.m.-4:47 p.m.

1 stop7h 47m

C$ 484

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Fri 27/11

2:45 p.m.-10:16 p.m.

1 stop7h 31m

Miami

Sat 5/12

8:45 a.m.-7:34 p.m.

2 stops10h 49m

C$ 485

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 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 5 August 2026.

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 at noon could potentially save you up to 3% on airfare.

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

Airfare is below average for this route at the moment.
Region of Ontario to Key Largo flights typically cost between C$ 481 and C$ 770 in September.
The cheapest round-trip price found within the last 5 days was C$ 356 on Air Canada (15 Sep-22 Sep).

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 1 August 2026.

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

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$ 437, Delta can have you in Key Largo from Region of Ontario in 5h 20m. 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$ 132 is the cheapest one-way deal found within the past few days, from Flair Airlines. You may also be able to find cheap deals on Porter Airlines and Air Canada, with prices starting from C$ 170 and C$ 196, 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 Montreal Pierre Elliott Trudeau Intl - Miami. You may also consider Toronto Pearson 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 Qatar Airways (77%), American Airlines (75%) or GOL (69%) 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$ 258. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Miami) can be booked for C$ 444 on average, our data indicates C$ 998 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.

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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Pierre Elliott Trudeau Intl to Fort Lauderdale flights
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Abbotsford to Miami flights
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Pearson Intl to Sarasota flights
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Halifax to Fort Lauderdale flights
Kelowna to Orlando flights
Ottawa to Tampa flights
Calgary to Tampa flights
Vancouver Intl to Tampa flights
St. John's to Fort Lauderdale flights
Pearson Intl to Daytona Beach flights
Edmonton to Miami flights

Top 9 airlines flying from Ontario to Key Largo

Discover the top 9 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 5 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 121AverageC$ 600FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Flair AirlinesCheapestC$ 154AverageC$ 322FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 171AverageC$ 560FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 189AverageC$ 456FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
DeltaCheapestC$ 195AverageC$ 397FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 206AverageC$ 495FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 233AverageC$ 627FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air TransatCheapestC$ 257AverageC$ 500FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
APG AirlinesCheapestC$ 637AverageC$ 686FlexibilityNo 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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