How long is the flight from Montreal to Key Largo?

A quick flight from Montreal to Key Largo can take about 6h 34m. Delta provides one of the quickest options available for as low as C$ 430. The distance between Montreal and Key Largo is about 2261 km.

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

For one-way options, check prices for Porter Airlines. According to our data, you can fly for as low as C$ 178. Users have also found prices from C$ 216 and C$ 221 on Delta and Air Transat, 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$ 1,061, our data shows the cheapest flight currently is C$ 264. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 379 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 Rouge (100%), Qatar Airways (88%), American Airlines (79%).

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

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

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$ 222+ Cheap Flights from Montreal to Key Largo

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

Airfare is below average for this route at the moment. Montreal to Key Largo flights typically cost between C$ 412 and C$ 646 in April. The cheapest round-trip price found within the last 3 days was C$ 368 on Air Canada (1 Apr-2 Apr).

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 Tuesday 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

Best

Direct

Last-minute

One-way

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 26 February 2026.

Wed 1/48:00 a.m.

YUL

MIA

1 stop7h 17m

Air Canada

Thu 2/48:00 a.m.

MIA

YUL

Nonstop3h 32m

Air Canada

Deal found 25/2C$ 368

Sun 22/31:30 p.m.

YUL

MIA

Nonstop3h 59m

Air Canada

Wed 8/48:00 a.m.

MIA

YUL

Nonstop3h 32m

Air Canada

Deal found 22/2C$ 370

Sun 12/46:30 p.m.

YUL

MIA

Nonstop3h 47m

Air Canada

Tue 21/412:25 p.m.

MIA

YUL

Nonstop3h 40m

Air Canada

Deal found 25/2C$ 378

Sat 21/36:45 a.m.

YUL

MIA

1 stop6h 24m

Porter Airlines

Wed 25/32:10 p.m.

MIA

YUL

1 stop6h 42m

Porter Airlines

Deal found 24/2C$ 379

Wed 15/46:30 p.m.

YUL

MIA

Nonstop3h 47m

Air Canada

Tue 21/48:00 a.m.

MIA

YUL

Nonstop3h 32m

Air Canada

Deal found 24/2C$ 385

Wed 11/36:30 p.m.

YUL

MIA

Nonstop3h 59m

Air Canada

Thu 9/48:00 a.m.

MIA

YUL

Nonstop3h 32m

Air Canada

Deal found 25/2C$ 391

Find flight deals from Montreal to Key Largo

Round-trip from	C$ 368
One-way from	C$ 222
Popular in	December
Cheapest in	April
Average price	C$ 541

Air Canada
1/4-2/4
1 total stop
10h 49m total
Montreal to Key Largo

Search Deals

Porter Airlines
23/3
1 total stop
6h 24m total
Montreal to Key Largo

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (C$ 86 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

Fly from

Fly to

Route

Depart

Return

Price

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 16/5

2:29 p.m.-9:03 p.m.

1 stop6h 34m

Miami

Tue 19/5

2:01 p.m.-11:57 p.m.

1 stop9h 56m

C$ 430

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 16/5

2:29 p.m.-9:03 p.m.

1 stop6h 34m

Miami

Sun 24/5

6:00 a.m.-11:35 a.m.

1 stop5h 35m

C$ 430

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 6/4

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

1 stop8h 08m

Miami

Tue 14/4

6:00 a.m.-11:36 a.m.

1 stop5h 36m

C$ 431

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 23/3

7:00 a.m.-5:21 p.m.

1 stop10h 21m

Miami

Wed 25/3

7:00 a.m.-1:37 p.m.

1 stop6h 37m

C$ 431

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 28/3

7:00 a.m.-2:10 p.m.

1 stop7h 10m

Miami

Tue 31/3

12:01 p.m.-5:31 p.m.

1 stop5h 30m

C$ 431

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 29/3

7:00 a.m.-2:10 p.m.

1 stop7h 10m

Miami

Tue 31/3

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

1 stop5h 37m

C$ 431

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 8/3

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

1 stop6h 07m

Miami

Tue 17/3

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

1 stop8h 12m

C$ 443

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 8/3

7:00 a.m.-5:21 p.m.

1 stop10h 21m

Miami

Tue 7/4

8:10 a.m.-5:31 p.m.

1 stop9h 21m

C$ 468

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 8/3

6:00 a.m.-5:08 p.m.

1 stop11h 08m

Miami

Wed 18/3

7:00 a.m.-1:37 p.m.

1 stop6h 37m

C$ 469

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 29/3

7:00 a.m.-3:49 p.m.

1 stop8h 49m

Miami

Sun 5/4

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

1 stop10h 26m

C$ 486

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/2

Showing 1-10 of 23 resultsSorted by cheapest first

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.

YUL-MIA

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

YMQ-KE9

YUL-MIA

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

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$ 115). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 198). 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?

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?

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

The most flights from YMQ to KE9 are scheduled on a Monday (8 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

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

419 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

Porter Airlines

8.0

Very good

419 reviews

Porter Airlines

8.0

Very good

419 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

United Airlines

7.4

Good

9,347 reviews

Porter Airlines

8.0

Very good

419 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

American Airlines

7.2

Good

11,352 reviews

Porter Airlines

8.0

Very good

419 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

WestJet

7.2

Good

3,275 reviews

Porter Airlines

8.0

Very good

419 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

Air Canada

7.1

Good

10,747 reviews

Porter Airlines

8.0

Very good

419 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

Related info for your journey

How long is the flight from Montreal to Key Largo?
A quick flight from Montreal to Key Largo can take about 6h 34m. Delta provides one of the quickest options available for as low as C$ 430. The distance between Montreal and Key Largo is about 2261 km.
What are the cheapest airlines to fly from Montreal to Key Largo one-way?
For one-way options, check prices for Porter Airlines. According to our data, you can fly for as low as C$ 178. Users have also found prices from C$ 216 and C$ 221 on Delta and Air Transat, 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%), Qatar Airways (88%), American Airlines (79%).
What are the cheapest flights from Montreal to Key Largo?
While on average a flight from Montreal to Key Largo is generally C$ 1,061, our data shows the cheapest flight currently is C$ 264. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 379 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$ 115). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 198). 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

Alternative routes

Complete your trip

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Flights by cabin class

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Popular flights

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Top 8 airlines flying from Montreal to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Flair Airlines	CheapestC$ 93	AverageC$ 181	FlexibilityNo cancel fee	On-timeN/A	Search Flair Airlines flights
United Airlines	CheapestC$ 101	AverageC$ 431	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	CheapestC$ 128	AverageC$ 459	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
American Airlines	CheapestC$ 140	AverageC$ 365	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Porter Airlines	CheapestC$ 148	AverageC$ 390	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Air Transat	CheapestC$ 174	AverageC$ 400	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Delta	CheapestC$ 181	AverageC$ 414	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
WestJet	CheapestC$ 201	AverageC$ 556	FlexibilityNo cancel fee	On-time60%	Search WestJet 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$ 222

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 26 February 2026.

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 26 February 2026.

Best flights from Montreal to Key LargoDiscover 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 26 February 2026.

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 26 February 2026.

Direct flights from Montreal to Key LargoExplore direct flight options from Montreal to Key Largo based on user searches, and compare prices and availability for your desired travel dates. Data last updated 26 February 2026.

Explore direct flight options from Montreal to Key Largo based on user searches, and compare prices and availability for your desired travel dates. Data last updated 26 February 2026.

Last-minute flights from Montreal to Key LargoDiscover last-minute flight deals from Montreal to Key Largo. Data last updated 26 February 2026 and is based on user searches.

Discover last-minute flight deals from Montreal to Key Largo. Data last updated 26 February 2026 and is based on user searches.

One-way flights from Montreal to Key LargoSearch for one-way flight options from Montreal to Key Largo. Find affordable one-way fares based on user searches. Data last updated 26 February 2026.

Search for one-way flight options from Montreal to Key Largo. Find affordable one-way fares based on user searches. Data last updated 26 February 2026.

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 26 February 2026.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 20 February 2026.

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 26 February 2026.

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 21 February 2026.

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 26 February 2026.

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,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.

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?

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

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Complete your trip

Complete your trip to Key Largo by adding a car rental and/or hotel reservation to your travel itinerary.

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Search flights from Montreal to Key Largo by cabin class

Find flights from Montreal to Key Largo, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Montreal and Key Largo flights

Browse other Montreal and Key Largo flight options. Last updated on 26 February 2026.

Other flights from Montreal

Browse through other flights departing from Montreal. Flights are based on user searches made on Cheapflights and were last updated on 26 February 2026.

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Top 8 airlines flying from Montreal to Key Largo

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How does Cheapflights help users find flights from Montreal to Key Largo?

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

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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 26 February 2026.

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 26 February 2026.

Direct flights from Montreal to Key Largo
Explore direct flight options from Montreal to Key Largo based on user searches, and compare prices and availability for your desired travel dates. Data last updated 26 February 2026.

Last-minute flights from Montreal to Key Largo
Discover last-minute flight deals from Montreal to Key Largo. Data last updated 26 February 2026 and is based on user searches.

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 26 February 2026.