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Cheap flights from Ontario to Key Largo from C$ 187

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 19/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MIA
5 May — 12 May1
1 adult

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 30 April 2025.

Round-trip from

C$ 299

One-way from

C$ 187

Popular in

December

Cheapest in

April

Average price

C$ 408
Air Canada
  • Air Canada
  • 17/6-20/6
  • 2 total stops
  • 17h 44m total
  • Ontario to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 19/5
  • 1 total stop
  • 7h 58m 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. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 30 April 2025.

Tue 17/63:25 p.m.YTZ - MIA
1 stop8h 53mAir Canada
Fri 20/67:55 a.m.MIA - YTZ
1 stop8h 51mAir Canada
Deal found 28/4C$ 299
Tue 17/65:00 p.m.YYZ - MIA
1 stop7h 18mAir Canada
Fri 20/611:55 a.m.MIA - YYZ
Nonstop3h 21mAir Canada
Deal found 28/4C$ 307
Sat 24/59:35 a.m.YYZ - MIA
Nonstop3h 20mPorter Airlines
Sat 31/51:55 p.m.MIA - YYZ
Nonstop3h 20mPorter Airlines
Deal found 28/4C$ 309
Mon 19/57:25 p.m.YYZ - MIA
1 stop17h 41mMultiple Airlines
Wed 21/55:54 p.m.MIA - YYZ
1 stop14h 01mMultiple Airlines
Deal found 27/4C$ 347
Thu 22/56:00 a.m.YYZ - MIA
Nonstop3h 30mAmerican Airlines
Sun 25/57:20 a.m.MIA - YYZ
1 stop8h 20mAmerican Airlines
Deal found 28/4C$ 375
Wed 18/69:30 a.m.YUL - MIA
Nonstop3h 41mAir Canada
Wed 25/67:55 a.m.MIA - YUL
Nonstop3h 36mAir Canada
Deal found 29/4C$ 375
Sun 18/512:55 p.m.YYZ - MIA
Nonstop3h 30mWestJet Encore
Mon 26/58:35 a.m.MIA - YYZ
Nonstop3h 24mWestJet Encore
Deal found 28/4C$ 376
Mon 19/56:30 a.m.YYZ - MIA
1 stop5h 22mDelta
Sun 25/57:15 a.m.MIA - YYZ
1 stop10h 10mDelta
Deal found 28/4C$ 386
Thu 29/57:45 a.m.YTZ - MIA
1 stop8h 23mMultiple Airlines
Thu 5/68:45 a.m.MIA - YTZ
1 stop11h 20mMultiple Airlines
Deal found 28/4C$ 394
Tue 20/512:44 p.m.YUL - MIA
1 stop5h 41mDelta
Tue 27/55:59 p.m.MIA - YUL
1 stop5h 55mDelta
Deal found 29/4C$ 400
Tue 6/57:50 p.m.YYZ - MIA
1 stop15h 39mUnited Airlines
Wed 7/51:29 p.m.MIA - YYZ
1 stop5h 36mUnited Airlines
Deal found 28/4C$ 406
Fri 9/57:00 a.m.YUL - MIA
Nonstop3h 40mAmerican Airlines
Mon 12/55:04 p.m.MIA - YUL
1 stop16h 46mAmerican Airlines
Deal found 29/4C$ 430

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 30 April 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

Tue 17/6

5:00 p.m.-12:18 a.m.

1 stop7h 18m

Miami

Fri 20/6

11:55 a.m.-3:16 p.m.

Nonstop3h 21m

C$ 307

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Sat 24/5

9:35 a.m.-12:55 p.m.

Nonstop3h 20m

Miami

Sat 31/5

1:55 p.m.-5:15 p.m.

Nonstop3h 20m

C$ 309

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 10/5

7:00 a.m.-10:40 a.m.

Nonstop3h 40m

Miami

Sat 10/5

3:30 p.m.-10:44 p.m.

2 stops7h 14m

C$ 335

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Mon 19/5

7:25 p.m.-1:06 p.m.

1 stop17h 41m

Miami

Wed 21/5

5:54 p.m.-7:55 a.m.

1 stop14h 01m

C$ 347

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Wed 18/6

3:25 p.m.-12:11 a.m.

1 stop8h 46m

Miami

Wed 25/6

7:55 a.m.-2:46 p.m.

1 stop6h 51m

C$ 350

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 25/5

9:30 a.m.-1:18 p.m.

Nonstop3h 48m

Miami

Wed 28/5

7:55 a.m.-11:37 a.m.

Nonstop3h 42m

C$ 353

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Thu 22/5

6:00 a.m.-9:30 a.m.

Nonstop3h 30m

Miami

Sun 25/5

7:20 a.m.-3:40 p.m.

1 stop8h 20m

C$ 375

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Sun 18/5

12:55 p.m.-4:25 p.m.

Nonstop3h 30m

Miami

Mon 26/5

8:35 a.m.-11:59 a.m.

Nonstop3h 24m

C$ 376

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Mon 19/5

6:30 a.m.-11:52 a.m.

1 stop5h 22m

Miami

Sun 25/5

7:15 a.m.-5:25 p.m.

1 stop10h 10m

C$ 386

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Sat 17/5

3:00 p.m.-9:51 p.m.

1 stop6h 51m

Miami

Wed 28/5

4:17 p.m.-11:58 p.m.

1 stop7h 41m

C$ 392

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 57 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 30 April 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 30 April 2025.

The most flights from CAON to KE9 are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Key Largo by month

Plan your trip to Key Largo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key Largo ranges from 41.0 - 252.0 mm per month. September is typically the wettest month, when rainfall can reach 252.0 mm. January is typically the driest time to visit Key Largo when rainfall is around 41.0 mm.

Temperature in Key Largo by month

Plan your trip to Key Largo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key Largo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 20.0 C).

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 30 April 2025.
To help decide which airline to fly from Ontario to Key Largo, see what other customers have to say about Porter Airlines, Delta and Air Transat. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Porter Airlines
8.0
Very good
285 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Delta
8.0
Very good
7,929 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Air Transat
7.8
Good
385 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
United Airlines
7.4
Good
8,696 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Boarding

8.2

Crew

8.8

Entertainment

7.0

Overall

8.0

Food

7.6

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

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.

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

    C$ 187 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 Porter Airlines and Air Transat, with prices starting from C$ 208 and C$ 220, 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 British Airways (74%), GOL (71%) or Air Canada Rouge (70%) 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$ 174. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Miami) can be booked for C$ 370 on average our data indicates C$ 1,227 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 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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 119AverageC$ 276FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
Canada JetlinesCheapestC$ 141AverageC$ 334FlexibilityNo cancel feeOn-time58%
Search Canada Jetlines flights
Porter AirlinesCheapestC$ 174AverageC$ 416FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
WestJetCheapestC$ 178AverageC$ 528FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 204AverageC$ 570FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 218AverageC$ 640FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 222AverageC$ 526FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 223AverageC$ 498FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapestC$ 239AverageC$ 426FlexibilityNo cancel feeOn-time50%
Search Air Transat 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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