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Cheap flights from Montreal to Key Largo from C$ 211

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
26 Feb — 5 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 8 days in advance, depart on a Wednesday or Thursday 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 27 January 2026.

Mon 9/26:45 a.m.
YUL
-
MIA
1 stop6h 24m
Porter Airlines
Wed 18/22:10 p.m.
MIA
-
YUL
1 stop6h 45m
Porter Airlines
Deal found 26/1C$ 394
Tue 24/311:45 a.m.
YUL
-
MIA
2 stops14h 24m
Multiple Airlines
Wed 8/44:05 p.m.
MIA
-
YUL
1 stop24h 20m
Multiple Airlines
Deal found 26/1C$ 400
Tue 24/311:45 a.m.
YUL
-
MIA
2 stops14h 24m
Multiple Airlines
Thu 9/47:20 a.m.
MIA
-
YUL
1 stop9h 05m
Multiple Airlines
Deal found 26/1C$ 401
Fri 27/28:55 a.m.
YUL
-
MIA
2 stops15h 04m
Multiple Airlines
Thu 5/312:52 p.m.
MIA
-
YUL
2 stops28h 53m
Multiple Airlines
Deal found 26/1C$ 407
Mon 23/33:50 p.m.
YUL
-
MIA
2 stops22h 17m
Multiple Airlines
Wed 8/44:05 p.m.
MIA
-
YUL
1 stop24h 20m
Multiple Airlines
Deal found 26/1C$ 411
Sun 15/36:45 p.m.
YUL
-
MIA
1 stop6h 07m
WestJet
Wed 25/36:00 a.m.
MIA
-
YUL
1 stop5h 37m
WestJet
Deal found 26/1C$ 414
Mon 16/312:42 p.m.
YUL
-
MIA
1 stop5h 46m
WestJet
Fri 1/512:12 p.m.
MIA
-
YUL
1 stop5h 23m
WestJet
Deal found 26/1C$ 415
Mon 9/36:45 p.m.
YUL
-
MIA
1 stop6h 07m
WestJet
Tue 24/36:00 a.m.
MIA
-
YUL
1 stop5h 37m
WestJet
Deal found 27/1C$ 416
Thu 5/36:45 a.m.
YUL
-
MIA
1 stop6h 24m
Multiple Airlines
Tue 17/311:52 a.m.
MIA
-
YUL
2 stops28h 38m
Multiple Airlines
Deal found 27/1C$ 418
Sat 7/39:37 a.m.
YUL
-
MIA
1 stop11h 33m
WestJet
Sat 14/37:00 a.m.
MIA
-
YUL
1 stop25h 30m
WestJet
Deal found 27/1C$ 419
Tue 24/311:45 a.m.
YUL
-
MIA
2 stops14h 24m
Multiple Airlines
Tue 7/47:20 a.m.
MIA
-
YUL
1 stop9h 05m
Multiple Airlines
Deal found 26/1C$ 420
Sun 22/26:00 p.m.
YUL
-
MIA
1 stop6h 53m
WestJet
Sat 28/26:00 a.m.
MIA
-
YUL
1 stop5h 25m
WestJet
Deal found 26/1C$ 422

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 27 January 2026.

Round-trip from

C$ 394

One-way from

C$ 211

Popular in

December

Cheapest in

April

Average price

C$ 478
Porter Airlines
  • Porter Airlines
  • 9/2-18/2
  • 2 total stops
  • 13h 09m total
  • Montreal to Key Largo
Search Deals
2/3
  • 2/3
  • 2 total stops
  • 28h 23m total
  • Montreal to Key Largo
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 27 January 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

Mon 23/2

7:00 a.m.-6:21 p.m.

1 stop11h 21m

Miami

Thu 12/3

7:05 a.m.-5:31 p.m.

1 stop10h 26m

C$ 456

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 23/3

6:45 a.m.-1:09 p.m.

1 stop6h 24m

Miami

Wed 25/3

2:10 p.m.-8:52 p.m.

1 stop6h 42m

C$ 459

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

7:00 a.m.-6:20 p.m.

1 stop11h 20m

Miami

Thu 12/2

7:15 a.m.-4:53 p.m.

1 stop9h 38m

C$ 463

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

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

1 stop6h 07m

Miami

Wed 1/4

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

1 stop8h 12m

C$ 463

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 11/4

12:42 p.m.-10:26 p.m.

1 stop9h 44m

Miami

Thu 16/4

6:15 p.m.-11:48 p.m.

1 stop5h 33m

C$ 467

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 19/3

6:45 a.m.-1:09 p.m.

1 stop6h 24m

Miami

Thu 30/4

2:10 p.m.-12:35 a.m.

1 stop10h 25m

C$ 472

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 21/2

12:30 p.m.-10:47 p.m.

1 stop10h 17m

Miami

Tue 3/3

10:33 a.m.-4:53 p.m.

1 stop6h 20m

C$ 472

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

6:02 p.m.-12:51 a.m.

1 stop6h 49m

Miami

Fri 13/2

4:46 p.m.-11:45 p.m.

1 stop6h 59m

C$ 472

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 11/4

12:42 p.m.-12:52 a.m.

1 stop12h 10m

Miami

Wed 15/4

12:12 p.m.-5:35 p.m.

1 stop5h 23m

C$ 474

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

6:02 p.m.-12:51 a.m.

1 stop6h 49m

Miami

Wed 18/2

10:33 a.m.-4:53 p.m.

1 stop6h 20m

C$ 475

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 24 results
1
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 23 January 2026.

Booking 8 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, February is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 115). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 203). 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 27 January 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 30% 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 24 January 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 27 January 2026.

The most flights from YMQ to KE9 are scheduled on a Monday (7 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 27 January 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
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,205 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
American Airlines
7.2
Good
11,197 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
WestJet
7.2
Good
3,251 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,660 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Overall

7.9

Comfort

7.9

Crew

8.6

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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 6h 24m. Delta provides one of the quickest options available for as low as C$ 459. 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$ 144. Users have also found prices from C$ 152 and C$ 207 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: Air Canada Rouge (100%), Air Canada (71%), American 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$ 498, our data shows the cheapest flight currently is C$ 205. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 394 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, February is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 115). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 203). 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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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 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 73AverageC$ 248FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 96AverageC$ 419FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 129AverageC$ 445FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 140AverageC$ 361FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 144AverageC$ 375FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
WestJetCheapestC$ 171AverageC$ 501FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 171AverageC$ 388FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapestC$ 187AverageC$ 394FlexibilityNo 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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