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

For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 222. Users have also found prices from C$ 243 and C$ 258 on American Airlines and Delta, respectively.

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.

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).

What are the cheapest flights from Montreal to Key Largo?

While on average a flight from Montreal to Key Largo is generally C$ 810, our data shows the cheapest flight currently is C$ 245. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 364 for that flight.

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 (86%), Air Canada Rouge (86%), Avianca (86%).

What are the most popular airlines that fly from Montreal to Key Largo?

Consider American Airlines, Air Canada or Delta when booking your flight. These represent the most popular airlines when flying from Montreal to Key Largo.

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

To save up to 32% on this flight, we recommend booking at least 41 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Montreal to Key Largo from C$ 461 1-2 weeks out and tickets from C$ 555 for flights departing within the next 72 hours.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, September can be a great choice for travel to Key Largo. Flights to Key Largo from Montreal in September are about C$ 478 on average during September, but can be found for as low as C$ 221.

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.

C$ 219+ Flights from Montreal to Key Largo

Cheapflights Tip: The best prices from Montreal to Key Largo are usually found in September or April, booked 40 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Montreal to Key Largo

Round-trip from	C$ 339
One-way from	C$ 219
Popular in	December
Cheapest in	September
Average price	C$ 496

Air Canada
7/8-11/8
Nonstop
7h 17m total
Montreal to Key Largo

Search Deals

1/10
2 total stops
11h 00m total
Montreal to Key Largo

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (C$ 37 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 July 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 3 July 2025.

Thu 7/87:35 p.m.YUL - MIA

Nonstop3h 41mAir Canada

Wed 27/87:55 a.m.MIA - YUL

Nonstop3h 36mAir Canada

Deal found 2/7C$ 339

Fri 31/106:45 a.m.YUL - MIA

1 stop6h 20mPorter Airlines

Mon 10/112:05 p.m.MIA - YUL

1 stop7h 38mPorter Airlines

Deal found 2/7C$ 365

Wed 3/912:59 p.m.YUL - MIA

1 stop5h 38mAmerican Airlines

Sun 7/98:50 p.m.MIA - YUL

1 stop13h 08mAmerican Airlines

Deal found 3/7C$ 405

Thu 16/106:00 a.m.YUL - MIA

1 stop8h 17mUnited Airlines

Tue 21/106:05 a.m.MIA - YUL

1 stop7h 04mUnited Airlines

Deal found 1/7C$ 407

Mon 25/87:35 p.m.YUL - MIA

Nonstop3h 41mMultiple Airlines

Wed 3/97:00 a.m.MIA - YUL

2 stops15h 15mMultiple Airlines

Deal found 1/7C$ 421

Thu 7/87:00 a.m.YUL - MIA

1 stop9h 53mDelta

Thu 14/82:45 p.m.MIA - YUL

1 stop9h 08mDelta

Deal found 1/7C$ 435

Best flights from Montreal to Key Largo
Discover carefully curated flight deals from Montreal to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 3 July 2025.

Thu 7/87:35 p.m.YUL - MIA

Nonstop3h 41mAir Canada

Mon 11/87:55 a.m.MIA - YUL

Nonstop3h 36mAir Canada

Deal found 2/7C$ 339

Fri 31/106:45 a.m.YUL - MIA

1 stop6h 20mPorter Airlines

Mon 10/112:05 p.m.MIA - YUL

1 stop7h 38mPorter Airlines

Deal found 3/7C$ 364

Wed 3/912:59 p.m.YUL - MIA

1 stop5h 38mAmerican Airlines

Sun 7/98:50 p.m.MIA - YUL

1 stop13h 08mAmerican Airlines

Deal found 3/7C$ 405

Thu 16/106:00 a.m.YUL - MIA

1 stop8h 17mUnited Airlines

Tue 21/106:05 a.m.MIA - YUL

1 stop7h 04mUnited Airlines

Deal found 1/7C$ 407

Tue 15/71:10 p.m.YUL - MIA

2 stops23h 13mMultiple Airlines

Tue 22/78:30 a.m.MIA - YUL

1 stop9h 25mMultiple Airlines

Deal found 3/7C$ 421

Thu 7/87:00 a.m.YUL - MIA

1 stop9h 53mDelta

Thu 14/82:45 p.m.MIA - YUL

1 stop9h 08mDelta

Deal found 1/7C$ 435

Last-minute flights from Montreal to Key Largo
Discover last-minute flight deals from Montreal to Key Largo. Data last updated 3 July 2025 and is based on user searches.

Tue 8/78:30 p.m.YUL - MIA

Nonstop3h 41mAir Canada

Tue 15/77:55 a.m.MIA - YUL

Nonstop3h 36mAir Canada

Deal found 1/7C$ 339

Tue 8/71:10 p.m.YUL - MIA

2 stops23h 13mMultiple Airlines

Tue 15/78:30 a.m.MIA - YUL

1 stop9h 25mMultiple Airlines

Deal found 1/7C$ 478

Wed 9/72:35 p.m.YUL - MIA

1 stop10h 02mAmerican Airlines

Wed 16/77:05 a.m.MIA - YUL

1 stop9h 40mAmerican Airlines

Deal found 2/7C$ 435

Wed 9/76:15 a.m.YUL - MIA

1 stop8h 55mUnited Airlines

Mon 21/76:22 a.m.MIA - YUL

1 stop6h 47mUnited Airlines

Deal found 30/6C$ 437

Wed 9/77:00 a.m.YUL - MIA

1 stop6h 07mDelta

Wed 16/712:46 p.m.MIA - YUL

1 stop10h 22mDelta

Deal found 3/7C$ 452

Thu 7/87:35 p.m.YUL - MIA

Nonstop3h 41mAir Canada

Mon 11/87:55 a.m.MIA - YUL

Nonstop3h 36mAir Canada

Deal found 2/7C$ 339

Thu 7/87:00 a.m.YUL - MIA

1 stop9h 53mDelta

Thu 14/82:45 p.m.MIA - YUL

1 stop9h 08mDelta

Deal found 1/7C$ 435

Wed 20/811:23 a.m.YUL - MIA

1 stop5h 49mUnited Airlines

Wed 27/87:45 a.m.MIA - YUL

1 stop8h 25mUnited Airlines

Deal found 1/7C$ 436

Mon 25/87:35 p.m.YUL - MIA

Nonstop3h 41mMultiple Airlines

Wed 3/97:00 a.m.MIA - YUL

2 stops15h 15mMultiple Airlines

Deal found 1/7C$ 421

Wed 27/810:31 a.m.YUL - MIA

1 stop9h 41mAmerican Airlines

Thu 11/96:10 a.m.MIA - YUL

2 stops9h 19mAmerican Airlines

Deal found 2/7C$ 424

One-way flights from Montreal to Key Largo
Search for one-way flight options from Montreal to Key Largo. Find affordable one-way fares based on user searches. Data last updated 3 July 2025.

Wed 1/103:10 p.m.YUL - MIA

2 stops11h 00mMultiple Airlines

Deal found 2/7C$ 219

Mon 22/99:30 a.m.YUL - MIA

Nonstop3h 50mAir Canada

Deal found 1/7C$ 222

Wed 1/1010:38 a.m.YUL - MIA

1 stop5h 38mAmerican Airlines

Deal found 3/7C$ 243

Tue 5/812:47 p.m.YUL - MIA

1 stop10h 45mDelta

Deal found 1/7C$ 258

Tue 8/711:23 a.m.YUL - MIA

1 stop8h 16mUnited Airlines

Deal found 2/7C$ 275

Mon 11/87:00 a.m.YUL - MIA

1 stop6h 33mWestJet

Deal found 2/7C$ 279

Cheapflights Fare Finder

Use the filters below to find and compare flights from Montreal to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 7/8

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$ 339

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 31/10

6:45 a.m.-1:05 p.m.

1 stop6h 20m

Miami

Mon 10/11

2:05 p.m.-9:43 p.m.

1 stop7h 38m

C$ 365

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 3/9

12:59 p.m.-6:37 p.m.

1 stop5h 38m

Miami

Sun 7/9

8:50 p.m.-9:58 a.m.

1 stop13h 08m

C$ 405

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 16/10

6:00 a.m.-2:17 p.m.

1 stop8h 17m

Miami

Tue 21/10

6:05 a.m.-1:09 p.m.

1 stop7h 04m

C$ 407

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 25/8

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

Nonstop3h 41m

Miami

Wed 3/9

7:00 a.m.-10:15 p.m.

2 stops15h 15m

C$ 421

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 7/8

7:00 a.m.-4:53 p.m.

1 stop9h 53m

Miami

Thu 14/8

2:45 p.m.-11:53 p.m.

1 stop9h 08m

C$ 435

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

3:10 p.m.-2:10 a.m.

2 stops11h 00m

C$ 219

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 22/9

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

Nonstop3h 50m

C$ 222

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

6:45 a.m.-1:05 p.m.

1 stop6h 20m

C$ 226

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

7:25 a.m.-1:57 p.m.

1 stop6h 32m

C$ 243

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Showing 1-10 of 12 results

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?

Booking 40 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?

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?

Travelers seeking maximum savings on their Montreal to Key Largo flight should consider departing on Tuesday afternoons 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

The most flights from YMQ to KE9 are scheduled on a Wednesday (6 on average). You will have fewer flight options on Monday, 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

Check out reviews from past customers who have flown with Porter Airlines,Delta, andUnited 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

298 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!

Porter Airlines

8.0

Very good

298 reviews

Porter Airlines

8.0

Very good

298 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

Delta

8.0

Very good

7,970 reviews

Porter Airlines

8.0

Very good

298 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

United Airlines

7.4

Good

8,845 reviews

Porter Airlines

8.0

Very good

298 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

American Airlines

7.2

Good

10,000 reviews

Porter Airlines

8.0

Very good

298 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

WestJet

7.2

Good

2,917 reviews

Porter Airlines

8.0

Very good

298 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mary,Jun 2025

FLL - YYZ

Related info for your journey

What are the cheapest airlines to fly from Montreal to Key Largo one-way?
For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 222. Users have also found prices from C$ 243 and C$ 258 on American Airlines and Delta, 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 (86%), Air Canada Rouge (86%), Avianca (86%).
What are the cheapest flights from Montreal to Key Largo?
While on average a flight from Montreal to Key Largo is generally C$ 810, our data shows the cheapest flight currently is C$ 245. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 364 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

Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from Montreal to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Flair Airlines	CheapestC$ 115	AverageC$ 286	FlexibilityNo cancel fee	On-timeN/A	Search Flair Airlines flights
United Airlines	CheapestC$ 138	AverageC$ 410	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Porter Airlines	CheapestC$ 168	AverageC$ 364	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
American Airlines	CheapestC$ 183	AverageC$ 596	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 187	AverageC$ 446	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Air Transat	CheapestC$ 200	AverageC$ 429	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
WestJet	CheapestC$ 242	AverageC$ 585	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Delta	CheapestC$ 304	AverageC$ 436	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

Fly with Cheapflights

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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Cheap flights from Montreal to Key Largo from C$ 219

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Montreal to Key Largo are usually found in September or April, booked 40 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 3 July 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Montreal to Key Largo

Cheapest flights from Montreal to Key LargoExplore 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 3 July 2025.

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 3 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Montreal to Key Largo that are best for you.

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.

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 27 June 2025.

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

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 3 July 2025.

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.

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 3 July 2025.

How much does it cost to fly round-trip from Montreal to Key Largo?

Reviews of airlines servicing Key Largo

Check out reviews from past customers who have flown with Porter Airlines,Delta, andUnited 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.

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.

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

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

What are the cheapest flights from Montreal to Key Largo?

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Montreal to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.

Top 8 airlines flying from Montreal to Key Largo

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?

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

Can Cheapflights 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?

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Travel Smart

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 3 July 2025.