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Cheap flights from Ontario to Key Largo from C$ 205

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MIA
17 Apr — 24 Apr1
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 18 March 2026.

Mon 13/49:40 a.m.
YYZ
-
MIA
Nonstop3h 24m
Air Transat
Thu 16/42:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 17/3C$ 338
Fri 27/119:40 a.m.
YYZ
-
MIA
Nonstop3h 29m
Air Transat
Sun 6/122:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 17/3C$ 340
Mon 13/49:40 a.m.
YYZ
-
MIA
Nonstop3h 24m
Air Transat
Mon 20/42:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 15/3C$ 341
Mon 20/49:40 a.m.
YYZ
-
MIA
Nonstop3h 24m
Air Transat
Fri 24/42:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 17/3C$ 360
Thu 9/412:00 p.m.
YTZ
-
MIA
2 stops14h 11m
Multiple Airlines
Thu 16/49:21 p.m.
MIA
-
YTZ
1 stop21h 26m
Multiple Airlines
Deal found 16/3C$ 360
Mon 20/49:40 a.m.
YYZ
-
MIA
Nonstop3h 24m
Air Transat
Thu 23/42:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 14/3C$ 362
Sun 12/49:40 a.m.
YYZ
-
MIA
Nonstop3h 24m
Air Transat
Mon 20/42:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 15/3C$ 363
Sun 22/39:40 a.m.
YYZ
-
MIA
Nonstop3h 29m
Air Transat
Fri 27/32:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 14/3C$ 364
Mon 30/39:40 a.m.
YYZ
-
MIA
Nonstop3h 29m
Air Transat
Wed 1/42:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 17/3C$ 377
Mon 13/49:40 a.m.
YYZ
-
MIA
Nonstop3h 24m
Air Transat
Fri 17/42:10 p.m.
MIA
-
YYZ
Nonstop3h 20m
Air Transat
Deal found 15/3C$ 381
Tue 14/49:25 a.m.
YTZ
-
MIA
1 stop9h 51m
Multiple Airlines
Tue 21/45:49 p.m.
MIA
-
YTZ
1 stop16h 36m
Multiple Airlines
Deal found 16/3C$ 381
Mon 6/43:00 p.m.
YTZ
-
MIA
1 stop28h 16m
Multiple Airlines
Wed 15/45:49 p.m.
MIA
-
YTZ
2 stops26h 14m
Multiple Airlines
Deal found 16/3C$ 390

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 18 March 2026.

Round-trip from

C$ 338

One-way from

C$ 205

Popular in

December

Cheapest in

April

Average price

C$ 487
Air Transat
  • Air Transat
  • 13/4-16/4
  • Nonstop
  • 6h 44m total
  • Ontario to Key Largo
Search Deals
8/4
  • 8/4
  • 1 total stop
  • 11h 31m total
  • Ontario to Key Largo
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 44 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 March 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 18 March 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

OttawaMiami

YOW - MIA

YOWMIA

Ottawa

Fri 17/4

10:00 a.m.-4:16 p.m.

1 stop6h 16m

Miami

Sat 25/4

8:55 a.m.-9:35 p.m.

1 stop12h 40m

C$ 463

OttawaMiami

YOW - MIA

YOWMIA

Ottawa

Thu 9/4

3:10 p.m.-8:58 p.m.

1 stop5h 48m

Miami

Tue 14/4

12:24 p.m.-9:35 p.m.

1 stop9h 11m

C$ 463

OttawaMiami

YOW - MIA

YOWMIA

Ottawa

Tue 14/4

6:00 a.m.-10:45 p.m.

3 stops16h 45m

Miami

Tue 21/4

12:24 p.m.-9:35 p.m.

1 stop9h 11m

C$ 463

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Sat 11/4

8:45 a.m.-7:16 p.m.

1 stop10h 31m

Miami

Tue 14/4

10:39 a.m.-8:49 p.m.

1 stop10h 10m

C$ 472

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Mon 6/4

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

1 stop8h 00m

Miami

Thu 9/4

8:55 a.m.-3:46 p.m.

1 stop6h 51m

C$ 485

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 27/4

9:25 a.m.-4:22 p.m.

1 stop6h 57m

Miami

Thu 30/4

5:49 p.m.-1:00 p.m.

1 stop19h 11m

C$ 487

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Thu 30/4

12:30 p.m.-11:51 p.m.

2 stops11h 21m

Miami

Thu 7/5

7:09 p.m.-8:00 a.m.

1 stop12h 51m

C$ 498

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 13/4

9:25 a.m.-7:16 p.m.

1 stop9h 51m

Miami

Tue 14/4

10:39 a.m.-8:03 p.m.

2 stops9h 24m

C$ 503

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 14/5

9:15 a.m.-4:16 p.m.

1 stop7h 01m

Miami

Tue 19/5

7:00 a.m.-1:09 p.m.

1 stop6h 09m

C$ 503

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Tue 28/4

12:16 p.m.-5:20 p.m.

1 stop5h 04m

Miami

Sun 10/5

6:35 a.m.-4:12 p.m.

1 stop9h 37m

C$ 513

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/3

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 month to book a flight from Region of Ontario to Key Largo?

Currently, March is the cheapest month in which you can book a flight from Region of Ontario to Key Largo (average of C$ 93). Flying from Region of 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.

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 18 March 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 evening tend to be the most expensive. A flight at noon could potentially save you up to 14% 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 14 March 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.

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 18 March 2026.

The most flights from CAON to KE9 are scheduled on a Thursday (11 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 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$ 513, United Airlines can have you in Key Largo from Region of Ontario in 5h 04m. 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$ 112 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 Transat, with prices starting from C$ 160 and C$ 193, 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 Envoy Air (85%), GOL (79%) or American Airlines (78%) 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$ 196. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Miami) can be booked for C$ 446 on average, our data indicates C$ 661 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, March is the cheapest month in which you can book a flight from Region of Ontario to Key Largo (average of C$ 93). Flying from Region of 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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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 Miami flights
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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 18 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 93AverageC$ 246FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
Air CanadaCheapestC$ 118AverageC$ 570FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 167AverageC$ 516FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 179AverageC$ 402FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
DeltaCheapestC$ 190AverageC$ 381FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 191AverageC$ 440FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 193AverageC$ 642FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 250AverageC$ 477FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
WestJet EncoreCheapestC$ 514AverageC$ 722FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
APG AirlinesCheapestC$ 621AverageC$ 668FlexibilityNo 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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