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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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
23 Mar — 30 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 Sunday 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 21 February 2026.

Mon 13/46:30 p.m.
YUL
-
MIA
Nonstop3h 47m
Air Canada
Tue 21/412:25 p.m.
MIA
-
YUL
Nonstop3h 40m
Air Canada
Deal found 20/2C$ 381
Thu 19/36:45 a.m.
YUL
-
MIA
1 stop6h 24m
Porter Airlines
Fri 27/32:10 p.m.
MIA
-
YUL
1 stop6h 42m
Porter Airlines
Deal found 19/2C$ 393
Thu 16/46:50 a.m.
YUL
-
MIA
2 stops13h 21m
Multiple Airlines
Wed 22/48:35 p.m.
MIA
-
YUL
1 stop19h 50m
Multiple Airlines
Deal found 19/2C$ 397
Thu 9/45:10 p.m.
YUL
-
MIA
1 stop9h 01m
Multiple Airlines
Thu 16/46:04 a.m.
MIA
-
YUL
1 stop10h 21m
Multiple Airlines
Deal found 17/2C$ 398
Mon 9/36:45 a.m.
YUL
-
MIA
1 stop6h 24m
Porter Airlines
Thu 26/32:10 p.m.
MIA
-
YUL
1 stop6h 42m
Porter Airlines
Deal found 19/2C$ 407
Mon 9/36:45 a.m.
YUL
-
MIA
1 stop6h 24m
Multiple Airlines
Wed 11/312:52 p.m.
MIA
-
YUL
2 stops26h 18m
Multiple Airlines
Deal found 19/2C$ 408
Sun 22/26:45 a.m.
YUL
-
MIA
1 stop6h 24m
Porter Airlines
Thu 26/22:10 p.m.
MIA
-
YUL
1 stop6h 50m
Porter Airlines
Deal found 19/2C$ 411
Sat 7/36:45 a.m.
YUL
-
MIA
1 stop6h 24m
Multiple Airlines
Tue 10/36:54 p.m.
MIA
-
YUL
2 stops21h 36m
Multiple Airlines
Deal found 18/2C$ 413
Thu 19/36:45 a.m.
YUL
-
MIA
1 stop6h 24m
Porter Airlines
Thu 26/32:10 p.m.
MIA
-
YUL
1 stop6h 42m
Porter Airlines
Deal found 19/2C$ 415
Mon 20/47:00 a.m.
YUL
-
MIA
1 stop7h 12m
WestJet
Sat 25/47:01 a.m.
MIA
-
YUL
1 stop6h 38m
WestJet
Deal found 20/2C$ 417

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 21 February 2026.

Round-trip from

C$ 381

One-way from

C$ 222

Popular in

December

Cheapest in

April

Average price

C$ 541
Air Canada
  • Air Canada
  • 13/4-21/4
  • Nonstop
  • 7h 27m total
  • Montreal to Key Largo
Search Deals
8/4
  • 8/4
  • 1 total stop
  • 11h 42m 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

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 21 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

Sat 2/5

9:30 a.m.-6:52 p.m.

1 stop9h 22m

Miami

Tue 12/5

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

1 stop5h 35m

C$ 420

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 2/5

7:00 a.m.-6:06 p.m.

1 stop11h 06m

Miami

Fri 8/5

7:00 a.m.-5:40 p.m.

1 stop10h 40m

C$ 420

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 3/5

6:45 p.m.-12:54 a.m.

1 stop6h 09m

Miami

Fri 8/5

8:05 a.m.-6:20 p.m.

2 stops10h 15m

C$ 433

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 9/5

8:00 p.m.-10:53 a.m.

2 stops14h 53m

Miami

Sun 24/5

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

1 stop5h 35m

C$ 450

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 29/4

6:30 p.m.-10:17 p.m.

Nonstop3h 47m

Miami

Tue 12/5

6:00 p.m.-9:40 p.m.

Nonstop3h 40m

C$ 452

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

9:30 a.m.-6:52 p.m.

1 stop9h 22m

Miami

Mon 20/4

6:15 p.m.-11:51 p.m.

1 stop5h 36m

C$ 456

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 13/4

6:45 p.m.-12:54 a.m.

1 stop6h 09m

Miami

Tue 21/4

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

1 stop5h 36m

C$ 456

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

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

1 stop6h 07m

Miami

Fri 3/4

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

1 stop9h 21m

C$ 457

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 17/4

6:45 p.m.-12:54 a.m.

1 stop6h 09m

Miami

Mon 20/4

7:00 a.m.-1:39 p.m.

1 stop6h 39m

C$ 457

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 30/4

6:45 p.m.-12:54 a.m.

1 stop6h 09m

Miami

Fri 8/5

7:00 a.m.-5:40 p.m.

1 stop10h 40m

C$ 459

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/2

Showing 1-10 of 22 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 20 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$ 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?

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 21 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 17 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 21 February 2026.

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

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 21 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
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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
9,335 reviews
Porter Airlines
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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
11,334 reviews
Porter Airlines
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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
3,270 reviews
Porter Airlines
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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
10,734 reviews
Porter Airlines
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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

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 47m. WestJet provides one of the quickest options available for as low as C$ 452. 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 Porter Airlines. According to our data, you can fly for as low as C$ 152. Users have also found prices from C$ 195 and C$ 216 on Air Transat 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 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$ 1,032, our data shows the cheapest flight currently is C$ 240. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 408 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

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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 21 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 91AverageC$ 174FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 101AverageC$ 431FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 128AverageC$ 456FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 140AverageC$ 364FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 147AverageC$ 387FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 174AverageC$ 393FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapestC$ 187AverageC$ 409FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 201AverageC$ 500FlexibilityNo cancel feeOn-time60%
Search WestJet 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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