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Cheap flights from Montreal to Key Largo from C$ 207

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
13 Mar — 20 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to Key Largo are usually found in April or June, booked 47 days in advance, depart on a Thursday or Sunday and return on a Saturday

Cheap flight deals from Montreal to Key Largo

Enter your travel dates to find the best prices.

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 11 February 2026.

Tue 10/21:30 p.m.
YUL
-
MIA
Nonstop3h 59m
Air Canada
Tue 17/28:00 a.m.
MIA
-
YUL
Nonstop3h 39m
Air Canada
Deal found 9/2C$ 405
Mon 9/37:40 a.m.
YUL
-
MIA
Nonstop3h 59m
Air Canada
Wed 18/37:25 a.m.
MIA
-
YUL
2 stops8h 15m
Air Canada
Deal found 9/2C$ 408
Mon 9/312:42 p.m.
YUL
-
MIA
1 stop5h 46m
WestJet
Wed 18/34:44 p.m.
MIA
-
YUL
1 stop7h 01m
WestJet
Deal found 9/2C$ 409
Sun 8/36:45 p.m.
YUL
-
MIA
1 stop6h 07m
WestJet
Fri 13/38:00 a.m.
MIA
-
YUL
1 stop15h 13m
WestJet
Deal found 10/2C$ 411
Mon 23/36:45 p.m.
YUL
-
MIA
1 stop6h 07m
WestJet
Tue 7/46:00 a.m.
MIA
-
YUL
1 stop5h 37m
WestJet
Deal found 10/2C$ 412
Sun 8/36:45 p.m.
YUL
-
MIA
1 stop6h 07m
WestJet
Wed 15/46:00 a.m.
MIA
-
YUL
1 stop5h 38m
WestJet
Deal found 11/2C$ 413
Wed 4/32:29 p.m.
YUL
-
MIA
1 stop6h 41m
WestJet
Wed 11/311:23 a.m.
MIA
-
YUL
2 stops19h 42m
WestJet
Deal found 11/2C$ 415
Sat 16/512:40 p.m.
YUL
-
MIA
1 stop8h 36m
WestJet
Tue 19/55:51 p.m.
MIA
-
YUL
1 stop6h 06m
WestJet
Deal found 9/2C$ 416
Tue 10/37:00 a.m.
YUL
-
MIA
1 stop7h 10m
WestJet
Thu 19/312:01 p.m.
MIA
-
YUL
1 stop5h 30m
WestJet
Deal found 11/2C$ 417
Sat 7/32:26 p.m.
YUL
-
MIA
1 stop6h 44m
WestJet
Sat 14/39:25 a.m.
MIA
-
YUL
2 stops15h 13m
WestJet
Deal found 9/2C$ 422
Thu 5/36:45 a.m.
YUL
-
MIA
1 stop6h 24m
Porter Airlines
Mon 16/32:10 p.m.
MIA
-
YUL
1 stop7h 57m
Porter Airlines
Deal found 9/2C$ 423

Find 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 11 February 2026.

Round-trip from

C$ 405

One-way from

C$ 207

Popular in

December

Cheapest in

April

Average price

C$ 533
Air Canada
  • Air Canada
  • 20/4-8/5
  • Nonstop
  • 7h 27m total
  • Montreal to Key Largo
Search Deals
10/3
  • 10/3
  • 1 total stop
  • 10h 31m total
  • Montreal to Key Largo
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 11 February 2026.
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

Tue 10/3

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

Nonstop3h 59m

Miami

Tue 17/3

6:15 p.m.-9:54 p.m.

Nonstop3h 39m

C$ 474

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 24/4

6:00 a.m.-2:27 p.m.

1 stop8h 27m

Miami

Sat 2/5

7:15 a.m.-1:09 p.m.

1 stop5h 54m

C$ 506

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 6/3

2:29 p.m.-11:20 p.m.

1 stop8h 51m

Miami

Wed 18/3

4:44 p.m.-11:45 p.m.

1 stop7h 01m

C$ 518

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 6/3

2:29 p.m.-11:20 p.m.

1 stop8h 51m

Miami

Tue 17/3

3:33 p.m.-11:45 p.m.

1 stop8h 12m

C$ 518

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 17/3

6:45 p.m.-12:52 a.m.

1 stop6h 07m

Miami

Sat 28/3

4:00 p.m.-8:30 a.m.

1 stop16h 30m

C$ 523

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 18/3

6:45 p.m.-12:52 a.m.

1 stop6h 07m

Miami

Sat 28/3

9:25 a.m.-8:30 a.m.

1 stop23h 05m

C$ 523

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 19/3

12:42 p.m.-8:50 p.m.

1 stop8h 08m

Miami

Sat 28/3

9:25 a.m.-8:30 a.m.

1 stop23h 05m

C$ 523

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 21/3

9:20 a.m.-9:22 p.m.

1 stop12h 02m

Miami

Sat 28/3

7:00 a.m.-8:30 a.m.

1 stop25h 30m

C$ 530

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 12/3

6:45 p.m.-12:52 a.m.

1 stop6h 07m

Miami

Thu 19/3

4:44 p.m.-11:45 p.m.

1 stop7h 01m

C$ 535

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 2/4

6:45 p.m.-12:52 a.m.

1 stop6h 07m

Miami

Fri 10/4

6:00 a.m.-11:37 a.m.

1 stop5h 37m

C$ 539

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/2

Showing 1-10 of 23 results
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2
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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 6 February 2026.

Booking 47 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, March is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 114). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 195). 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 11 February 2026.

One of the essential ways to save on airfare from Montreal to Key Largo is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 31% on airfare.

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 7 February 2026.

Travelers seeking maximum savings on their Montreal to Key Largo flight should consider departing on Monday evenings when fares are most often at their lowest. Thursday evenings 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 11 February 2026.

The most flights from YMQ to KE9 are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Montreal 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 11 February 2026.
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
7.9
Good
415 reviews
Check prices

Entertainment

6.9

Crew

8.6

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Milad,Feb 2026

LIR - YYZ

Not helpful staff at Liberia airport at the check-in counter. Extremely poor skill people and not willing to help the passenger.
Porter Airlines
7.9
Good
415 reviews
Porter Airlines
7.9
Good
415 reviews
Check prices

Entertainment

6.9

Crew

8.6

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Milad,Feb 2026

LIR - YYZ

Not helpful staff at Liberia airport at the check-in counter. Extremely poor skill people and not willing to help the passenger.
United Airlines
7.4
Good
9,274 reviews
Porter Airlines
7.9
Good
415 reviews
Check prices

Entertainment

6.9

Crew

8.6

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Milad,Feb 2026

LIR - YYZ

Not helpful staff at Liberia airport at the check-in counter. Extremely poor skill people and not willing to help the passenger.
American Airlines
7.2
Good
11,266 reviews
Porter Airlines
7.9
Good
415 reviews
Check prices

Entertainment

6.9

Crew

8.6

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Milad,Feb 2026

LIR - YYZ

Not helpful staff at Liberia airport at the check-in counter. Extremely poor skill people and not willing to help the passenger.
WestJet
7.2
Good
3,256 reviews
Porter Airlines
7.9
Good
415 reviews
Check prices

Entertainment

6.9

Crew

8.6

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Milad,Feb 2026

LIR - YYZ

Not helpful staff at Liberia airport at the check-in counter. Extremely poor skill people and not willing to help the passenger.
Air Canada
7.1
Good
10,708 reviews
Porter Airlines
7.9
Good
415 reviews
Check prices

Entertainment

6.9

Crew

8.6

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Milad,Feb 2026

LIR - YYZ

Not helpful staff at Liberia airport at the check-in counter. Extremely poor skill people and not willing to help the passenger.

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 59m. Air Canada provides one of the quickest options available for as low as C$ 474. The distance between Montreal and Key Largo is about 2261 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Montreal to Key Largo one-way?

    For one-way options, check prices for Air Transat. According to our data, you can fly for as low as C$ 141. Users have also found prices from C$ 150 and C$ 205 on Porter Airlines and Air Canada, respectively.

  • 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 (68%), Qatar Airways (68%), Porter Airlines (67%).

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

    While on average a flight from Montreal to Key Largo is generally C$ 742, our data shows the cheapest flight currently is C$ 222. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 413 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, March is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 114). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 195). 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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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 11 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 86AverageC$ 175FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 99AverageC$ 424FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 127AverageC$ 449FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 139AverageC$ 358FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 145AverageC$ 379FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
WestJetCheapestC$ 169AverageC$ 483FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 171AverageC$ 393FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapestC$ 185AverageC$ 398FlexibilityNo 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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