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Cheap flights from Montreal to Key Largo from C$ 220

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
23 Aug — 30 Aug1
1 adult

Cheapflights Tip: The best prices from Montreal to Key Largo are usually found in September or April, booked 31 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Montreal to Key Largo

Keep the following information in mind while searching for Montreal to Key Largo flight deals. Data was last updated 18 August 2025.

Round-trip from

C$ 341

One-way from

C$ 220

Popular in

December

Cheapest in

September

Average price

C$ 504
Air Canada
  • Air Canada
  • 15/10-28/10
  • 2 total stops
  • 15h 30m total
  • Montreal to Key Largo
Search Deals
Air Canada
  • Air Canada
  • 18/10
  • 1 total stop
  • 6h 38m total
  • Montreal to Key Largo
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 36 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 August 2025
Search Deals

Find flight deals from Montreal to Key Largo

Cheapest flights from Montreal to Key Largo
Explore the most affordable flight options available from Montreal to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 August 2025.

Mon 20/109:30 a.m.YUL - MIA
Nonstop3h 50mAir Canada
Sat 25/109:45 p.m.MIA - YUL
1 stop10h 37mAir Canada
Deal found 18/8C$ 344
Sun 5/109:30 a.m.YUL - MIA
Nonstop3h 50mAir Canada
Sat 11/102:25 p.m.MIA - YUL
Nonstop3h 36mAir Canada
Deal found 18/8C$ 345
Wed 3/97:50 a.m.YUL - MIA
2 stops8h 45mAmerican Airlines
Wed 3/97:42 p.m.MIA - YUL
1 stop16h 42mAmerican Airlines
Deal found 17/8C$ 348
Wed 3/97:50 a.m.YUL - MIA
2 stops8h 45mAmerican Airlines
Thu 4/98:50 a.m.MIA - YUL
1 stop6h 43mAmerican Airlines
Deal found 18/8C$ 373
Fri 5/99:30 a.m.YUL - MIA
Nonstop3h 50mAir Canada
Fri 19/92:20 p.m.MIA - YUL
Nonstop3h 40mAir Canada
Deal found 15/8C$ 387

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal 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 August 2025.
Use the filters below to find and compare flights from Montreal to Key Largo that are best for you.

Fly from

Montreal

Fly to

Key Largo

Route

Depart

Return

Price

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 5/9

9:30 a.m.-1:20 p.m.

Nonstop3h 50m

Miami

Fri 19/9

2:20 p.m.-6:00 p.m.

Nonstop3h 40m

C$ 387

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 6/1

6:30 p.m.-10:29 p.m.

Nonstop3h 59m

Miami

Tue 13/1

12:45 p.m.-4:24 p.m.

Nonstop3h 39m

C$ 403

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 20/1

6:30 p.m.-10:29 p.m.

Nonstop3h 59m

Miami

Wed 21/1

12:45 p.m.-4:24 p.m.

Nonstop3h 39m

C$ 406

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 10/2

12:10 p.m.-8:16 p.m.

1 stop8h 06m

Miami

Tue 17/2

7:25 a.m.-2:22 p.m.

1 stop6h 57m

C$ 416

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 4/2

7:00 a.m.-11:05 a.m.

Nonstop4h 05m

Miami

Wed 18/2

6:55 a.m.-12:20 p.m.

1 stop5h 25m

C$ 430

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 3/2

6:30 p.m.-10:29 p.m.

Nonstop3h 59m

Miami

Thu 19/2

8:00 a.m.-11:39 a.m.

Nonstop3h 39m

C$ 430

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

8:00 a.m.-11:59 a.m.

Nonstop3h 59m

Miami

Fri 30/1

8:00 a.m.-11:39 a.m.

Nonstop3h 39m

C$ 430

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

8:00 a.m.-11:59 a.m.

Nonstop3h 59m

Miami

Fri 6/2

8:00 a.m.-11:39 a.m.

Nonstop3h 39m

C$ 430

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 2/2

1:30 p.m.-5:29 p.m.

Nonstop3h 59m

Miami

Thu 19/2

12:45 p.m.-4:24 p.m.

Nonstop3h 39m

C$ 430

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

7:00 a.m.-2:28 p.m.

1 stop7h 28m

Miami

Fri 6/2

9:00 a.m.-3:02 p.m.

1 stop6h 02m

C$ 438

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/8

Showing 1-10 of 21 results
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Best time to book a flight from Montreal to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Montreal 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 Montreal to Key Largo

How far ahead should I book a flight from Montreal to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from Montreal to Key Largo. Price data was last updated on 8 August 2025.

Booking 31 days in advance of your planned departure date is, on average, the best time to get cheap flights from Montreal to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Montreal to Key Largo?

Currently, April is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 251). Flying from Montreal 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 YMQ to KE9?

Find hourly flight availability from Montreal 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 August 2025.

When flying from Montreal to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Montreal to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from Montreal to Key Largo. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Montreal to Key Largo flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Montreal to Key Largo

Explore weekly flight availability from Montreal 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 August 2025.

The most flights from YMQ to KE9 are scheduled on a Monday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

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 18 August 2025.
Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andAmerican Airlines from Montreal to Key Largo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
334 reviews
Check prices

Crew

8.7

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

7.0

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
334 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Crew

8.7

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

7.0

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
8,925 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Crew

8.7

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

7.0

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
334 reviews
Check prices

Crew

8.7

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

7.0

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
WestJet
7.2
Good
3,023 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Crew

8.7

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

7.0

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 Canada
7.1
Good
9,992 reviews
Porter Airlines
8.0
Very good
334 reviews
Check prices

Crew

8.7

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Entertainment

7.0

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 Montreal 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 Montreal to Key Largo?

    A quick flight from Montreal to Key Largo can take about 3h 50m. Air Canada provides one of the quickest options available for as low as C$ 387. The distance between Montreal and Key Largo is about 2261 km. All flights are typically direct.

  • What are the most reliable airlines from Montreal to Key Largo?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Montreal to Key Largo on time: American Airlines (88%), Qatar Airways (88%), Air Canada (84%).

  • What are the cheapest flights from Montreal to Key Largo?

    While on average a flight from Montreal to Key Largo is generally C$ 876, our data shows the cheapest flight currently is C$ 225. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 397 for that flight.

  • Can I find deals for flights from Montreal to Key Largo that include hotel bookings?

    Yes. In addition to deals on Montreal to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montreal to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montreal to Key Largo.

  • Can I find deals for business class flights from Montreal to Key Largo?

    Yes. Cheapflights offers flight deals from Montreal 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 Montreal to Key Largo?

    Currently, April is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 251). Flying from Montreal 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 Montreal to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Montreal to Key Largo

Discover the top 8 airlines that operate flights from Montreal 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 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 116AverageC$ 292FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 144AverageC$ 417FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 150AverageC$ 418FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 170AverageC$ 364FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 183AverageC$ 445FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 196AverageC$ 407FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
WestJetCheapestC$ 239AverageC$ 599FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 277AverageC$ 435FlexibilityNo cancel feeOn-timeN/A
Search Delta 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 Montreal to Key Largo?

Cheapflights makes it easy to find Montreal to Key Largo flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Montreal to Key Largo?

Millions of users choose and trust Cheapflights to book the best flight deals from Montreal to Key Largo for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Montreal to Key Largo with no change fees?

Yes! Cheapflights helps users easily find flights from Montreal to Key Largo with no change fees.

Can Cheapflights notify me if prices for flights from Montreal to Key Largo become cheaper?

Yes! Start tracking prices for Montreal to Key Largo flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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