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Cheap flights from Ontario to Key Largo from C$ 231

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 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MIA
5 Aug — 12 Aug1
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 31 July 2025.

Round-trip from

C$ 334

One-way from

C$ 231

Popular in

December

Cheapest in

January

Average price

C$ 479
Air Canada
  • Air Canada
  • 23/10-26/10
  • Nonstop
  • 6h 39m total
  • Ontario to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 30/8
  • Nonstop
  • 3h 41m total
  • Ontario to Key Largo
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 10 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 July 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 31 July 2025.

Thu 23/107:45 a.m.YYZ - MIA
Nonstop3h 18mAir Canada
Sun 26/109:05 p.m.MIA - YYZ
Nonstop3h 21mAir Canada
Deal found 29/7C$ 334
Wed 13/87:35 p.m.YUL - MIA
Nonstop3h 41mAir Canada
Wed 27/87:55 a.m.MIA - YUL
Nonstop3h 36mAir Canada
Deal found 30/7C$ 345
Thu 14/82:35 p.m.YUL - MIA
2 stops7h 10mAmerican Airlines
Fri 15/86:35 a.m.MIA - YUL
1 stop8h 50mAmerican Airlines
Deal found 30/7C$ 369
Thu 21/87:55 a.m.YYZ - MIA
1 stop15h 10mMultiple Airlines
Fri 12/911:45 a.m.MIA - YYZ
2 stops26h 20mMultiple Airlines
Deal found 29/7C$ 379
Thu 11/91:35 p.m.YTZ - MIA
1 stop9h 07mMultiple Airlines
Sun 14/97:10 a.m.MIA - YTZ
2 stops11h 08mMultiple Airlines
Deal found 29/7C$ 414
Mon 18/83:25 p.m.YTZ - MIA
1 stop7h 51mAir Canada
Tue 2/97:55 a.m.MIA - YTZ
1 stop8h 50mAir Canada
Deal found 29/7C$ 418
Tue 7/106:35 p.m.YUL - MIA
1 stop20h 07mMultiple Airlines
Sun 12/107:25 a.m.MIA - YUL
1 stop10h 30mMultiple Airlines
Deal found 29/7C$ 432
Mon 13/104:05 p.m.YOW - MIA
1 stop22h 37mMultiple Airlines
Sat 18/107:25 a.m.MIA - YOW
1 stop8h 31mMultiple Airlines
Deal found 30/7C$ 483
Thu 4/96:00 a.m.YOW - MIA
1 stop7h 20mAir Canada
Fri 12/92:20 p.m.MIA - YOW
1 stop7h 44mAir Canada
Deal found 29/7C$ 497
Wed 5/115:45 a.m.YXU - MIA
1 stop5h 41mAir Canada
Mon 10/119:05 p.m.MIA - YXU
1 stop11h 41mAir Canada
Deal found 31/7C$ 585
Fri 29/82:48 p.m.YOW - MIA
1 stop7h 57mUnited Airlines
Fri 5/98:30 a.m.MIA - YOW
1 stop8h 13mUnited Airlines
Deal found 30/7C$ 598
Tue 5/85:55 p.m.YXU - MIA
2 stops17h 23mMultiple Airlines
Tue 12/811:50 a.m.MIA - YXU
1 stop5h 17mMultiple Airlines
Deal found 29/7C$ 657

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 31 July 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

Thu 23/10

7:45 a.m.-11:03 a.m.

Nonstop3h 18m

Miami

Sun 26/10

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

Nonstop3h 21m

C$ 334

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 13/8

7:35 p.m.-11:16 p.m.

Nonstop3h 41m

Miami

Wed 27/8

7:55 a.m.-11:31 a.m.

Nonstop3h 36m

C$ 345

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 14/8

2:35 p.m.-9:45 p.m.

2 stops7h 10m

Miami

Fri 15/8

6:35 a.m.-3:25 p.m.

1 stop8h 50m

C$ 369

TorontoMiami

YYZ - MIA

YYZMIA

Toronto Pearson Intl

Thu 21/8

7:55 a.m.-11:05 p.m.

1 stop15h 10m

Miami

Fri 12/9

11:45 a.m.-2:05 p.m.

2 stops26h 20m

C$ 379

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Thu 11/9

1:35 p.m.-10:42 p.m.

1 stop9h 07m

Miami

Sun 14/9

7:10 a.m.-6:18 p.m.

2 stops11h 08m

C$ 414

TorontoMiami

YTZ - MIA

YTZMIA

Toronto Island

Mon 18/8

3:25 p.m.-11:16 p.m.

1 stop7h 51m

Miami

Tue 2/9

7:55 a.m.-4:45 p.m.

1 stop8h 50m

C$ 418

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 7/10

6:35 p.m.-2:42 p.m.

1 stop20h 07m

Miami

Sun 12/10

7:25 a.m.-5:55 p.m.

1 stop10h 30m

C$ 432

LondonMiami

YXU - MIA

YXUMIA

London

Wed 5/11

9:25 a.m.-3:31 p.m.

1 stop6h 06m

Miami

Mon 10/11

9:05 p.m.-8:46 a.m.

1 stop11h 41m

C$ 483

OttawaMiami

YOW - MIA

YOWMIA

Ottawa

Mon 13/10

4:05 p.m.-2:42 p.m.

1 stop22h 37m

Miami

Sat 18/10

7:25 a.m.-3:56 p.m.

1 stop8h 31m

C$ 483

OttawaMiami

YOW - MIA

YOWMIA

Ottawa

Thu 4/9

6:00 a.m.-1:20 p.m.

1 stop7h 20m

Miami

Fri 12/9

2:20 p.m.-10:04 p.m.

1 stop7h 44m

C$ 497

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 45 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 31 July 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 31 July 2025.

The most flights from CAON to KE9 are scheduled on a Thursday (10 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (6 on average).

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

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 31 July 2025.
Get a feel of what it's like to fly with Porter Airlines,Delta, andAir Transat from Ontario to Key Largo by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Entertainment

7.0

Crew

8.7

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
318 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Entertainment

7.0

Crew

8.7

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,981 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Entertainment

7.0

Crew

8.7

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Transat
7.7
Good
424 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Entertainment

7.0

Crew

8.7

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,900 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Entertainment

7.0

Crew

8.7

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Entertainment

7.0

Crew

8.7

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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$ 231 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 Air Transat and Porter Airlines, with prices starting from C$ 235 and C$ 273, 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 (85%), Qatar Airways (78%) or Brussels Airlines (75%) 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$ 236. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Miami) can be booked for C$ 367 on average our data indicates C$ 744 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 31 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 114AverageC$ 277FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
Porter AirlinesCheapestC$ 128AverageC$ 396FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Canada JetlinesCheapestC$ 141AverageC$ 290FlexibilityNo cancel feeOn-time58%
Search Canada Jetlines flights
WestJetCheapestC$ 176AverageC$ 518FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 201AverageC$ 555FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 209AverageC$ 383FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 216AverageC$ 528FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 234AverageC$ 619FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 251AverageC$ 461FlexibilityNo 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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