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Cheap flights from Ontario to Key Largo from C$ 174

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MIA
7 Apr — 14 Apr1
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 2 April 2025.

Round-trip from

C$ 314

One-way from

C$ 174

Popular in

December

Cheapest in

April

Average price

C$ 402
Air Canada
  • Air Canada
  • 7/5-14/5
  • Nonstop
  • 6h 41m total
  • Ontario to Key Largo
Search Deals
29/4
  • 29/4
  • 1 total stop
  • 11h 15m total
  • Ontario to Key Largo
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 2 April 2025.

Mon 14/49:40 a.m.YYZ - MIA
Nonstop3h 25mPorter Airlines
Thu 17/42:05 p.m.MIA - YYZ
Nonstop3h 25mPorter Airlines
Deal found 31/3C$ 289
Wed 28/55:00 p.m.YYZ - MIA
1 stop6h 23mAir Canada
Tue 3/67:55 a.m.MIA - YYZ
1 stop7h 39mAir Canada
Deal found 1/4C$ 314
Mon 14/49:40 a.m.YYZ - MIA
Nonstop3h 25mMultiple Airlines
Wed 14/58:53 a.m.MIA - YYZ
1 stop27h 37mMultiple Airlines
Deal found 31/3C$ 320
Sun 4/53:25 p.m.YTZ - MIA
1 stop7h 58mAir Canada
Wed 7/57:55 a.m.MIA - YTZ
1 stop6h 55mAir Canada
Deal found 31/3C$ 323
Wed 28/57:29 a.m.YUL - MIA
1 stop5h 38mAmerican Airlines
Wed 28/53:30 p.m.MIA - YUL
2 stops7h 14mAmerican Airlines
Deal found 1/4C$ 325
Wed 30/49:00 a.m.YUL - MIA
Nonstop3h 48mAir Canada
Tue 27/52:15 p.m.MIA - YUL
Nonstop3h 42mAir Canada
Deal found 1/4C$ 355
Tue 8/47:00 a.m.YUL - MIA
1 stop6h 41mDelta
Tue 15/410:25 a.m.MIA - YUL
1 stop6h 27mDelta
Deal found 1/4C$ 365
Tue 15/49:00 a.m.YYZ - MIA
1 stop5h 55mUnited Airlines
Thu 24/46:22 a.m.MIA - YYZ
1 stop7h 48mUnited Airlines
Deal found 31/3C$ 369
Tue 22/47:45 a.m.YTZ - MIA
1 stop11h 25mMultiple Airlines
Tue 29/45:45 a.m.MIA - YTZ
1 stop9h 30mMultiple Airlines
Deal found 1/4C$ 370
Wed 16/46:15 a.m.YYZ - MIA
1 stop6h 30mDelta
Thu 15/512:05 p.m.MIA - YYZ
1 stop9h 51mDelta
Deal found 1/4C$ 372
Tue 15/46:00 a.m.YYZ - MIA
Nonstop3h 25mAmerican Airlines
Sat 19/47:02 a.m.MIA - YYZ
1 stop11h 28mAmerican Airlines
Deal found 31/3C$ 401
Mon 7/47:15 p.m.YUL - MIA
1 stop15h 56mUnited Airlines
Tue 8/41:27 p.m.MIA - YUL
1 stop6h 18mUnited Airlines
Deal found 1/4C$ 402

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 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

Wed 7/5

6:15 a.m.-1:18 p.m.

1 stop7h 03m

Miami

Wed 14/5

12:20 p.m.-8:44 p.m.

1 stop8h 24m

C$ 314

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 28/5

7:29 a.m.-1:07 p.m.

1 stop5h 38m

Miami

Wed 28/5

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

2 stops7h 14m

C$ 325

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Thu 24/4

6:20 p.m.-12:48 a.m.

1 stop6h 28m

Miami

Thu 1/5

7:00 a.m.-5:10 p.m.

1 stop10h 10m

C$ 333

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Sun 13/4

9:40 a.m.-1:05 p.m.

Nonstop3h 25m

Miami

Thu 17/4

2:05 p.m.-5:30 p.m.

Nonstop3h 25m

C$ 340

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 28/4

3:25 p.m.-10:23 p.m.

1 stop6h 58m

Miami

Wed 7/5

7:55 a.m.-2:50 p.m.

1 stop6h 55m

C$ 340

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 30/4

11:20 a.m.-6:50 p.m.

1 stop7h 30m

Miami

Wed 28/5

2:26 p.m.-11:54 p.m.

1 stop9h 28m

C$ 355

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Mon 14/4

9:40 a.m.-1:05 p.m.

Nonstop3h 25m

Miami

Fri 25/4

5:50 p.m.-12:30 p.m.

1 stop18h 40m

C$ 356

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 28/4

9:00 a.m.-12:48 p.m.

Nonstop3h 48m

Miami

Thu 29/5

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

Nonstop3h 42m

C$ 356

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Tue 15/4

9:00 a.m.-2:55 p.m.

1 stop5h 55m

Miami

Sat 19/4

7:00 a.m.-3:46 p.m.

1 stop8h 46m

C$ 369

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Tue 22/4

7:45 a.m.-7:10 p.m.

1 stop11h 25m

Miami

Tue 29/4

5:45 a.m.-3:15 p.m.

1 stop9h 30m

C$ 370

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/4

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 2 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 2 April 2025.

The most flights from CAON to KE9 are scheduled on a Monday (10 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 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 2 April 2025.
To help decide which airline to fly from Ontario to Key Largo, see what other customers have to say about Delta, Porter Airlines and Air Transat. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,898 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
Delta
8.0
Very good
7,898 reviews
Delta
8.0
Very good
7,898 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
Porter Airlines
7.9
Good
278 reviews
Delta
8.0
Very good
7,898 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very good
7,898 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
United Airlines
7.4
Good
8,616 reviews
Delta
8.0
Very good
7,898 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,898 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.

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$ 179 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from C$ 192 and C$ 217, 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 (67%), GOL (67%) or Porter Airlines (66%) 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$ 167. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Miami) can be booked for C$ 353 on average our data indicates C$ 1,087 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 2 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 124AverageC$ 281FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
Canada JetlinesCheapestC$ 146AverageC$ 327FlexibilityNo cancel feeOn-time58%
Search Canada Jetlines flights
Porter AirlinesCheapestC$ 181AverageC$ 439FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
WestJetCheapestC$ 186AverageC$ 549FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 215AverageC$ 605FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 225AverageC$ 667FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 235AverageC$ 518FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 238AverageC$ 552FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air TransatCheapestC$ 248AverageC$ 442FlexibilityNo 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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