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$141+ Cheap flights from Key Largo, FL to Montreal (YMQ)

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — YMQ
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Montreal are usually found in February or November, booked 42 days in advance, depart on a Thursday or Friday and return on a Sunday

Cheap flight deals from Key Largo to Montreal

Keep the following information in mind while searching for Key Largo to Montreal flight deals. Data was last updated September 16, 2025.

Round-trip from

$293
(Kiwi.com)

One-way from

$141
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$384
From Key Largo to Montreal (YMQ)
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One-way flight from Key Largo to Montreal (YMQ)
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Highest demand for flights based on searches. 3% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Key Largo to Montreal

Cheapest flights from Key Largo to Montreal
Explore the most affordable flight options available from Key Largo to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:00 amMIA - YUL
2 stops18h 27mMultiple Airlines
Mon 10/276:45 amYUL - MIA
1 stop6h 24mMultiple Airlines
Deal found 9/13$293
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/711:28 amMIA - YUL
2 stops13h 15mMultiple Airlines
Sun 11/166:45 amYUL - MIA
1 stop6h 24mMultiple Airlines
Deal found 9/15$297
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/711:28 amMIA - YUL
2 stops13h 15mMultiple Airlines
Sun 11/96:45 amYUL - MIA
1 stop6h 24mMultiple Airlines
Deal found 9/13$303
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/66:00 amMIA - YUL
2 stops18h 27mMultiple Airlines
Tue 10/146:35 pmYUL - MIA
1 stop23h 32mMultiple Airlines
Deal found 9/13$307
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/36:00 amMIA - YUL
2 stops18h 43mMultiple Airlines
Sun 11/166:45 amYUL - MIA
1 stop6h 24mMultiple Airlines
Deal found 9/14$311
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/79:49 amMIA - YUL
1 stop8h 06mMultiple Airlines
Tue 10/146:35 pmYUL - MIA
1 stop23h 32mMultiple Airlines
Deal found 9/15$316
This Mytrip deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:00 amMIA - YUL
2 stops18h 43mMultiple Airlines
Wed 11/58:00 amYUL - MIA
Nonstop3h 59mMultiple Airlines
Deal found 9/14$324
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:16 pmMIA - YUL
2 stops30h 11mMultiple Airlines
Wed 10/226:35 pmYUL - MIA
1 stop14h 37mMultiple Airlines
Deal found 9/14$325

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Montreal 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 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Key Largo to Montreal that are best for you.

Fly from

Key Largo

Fly to

Montreal

Route

Depart

Return

Price

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Tue 10/7

9:49 am-5:55 pm

1 stop8h 06m

Montreal Pierre Elliott Trudeau Intl

Tue 10/14

7:00 am-1:11 pm

1 stop6h 11m

$368

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Tue 10/7

9:49 am-5:55 pm

1 stop8h 06m

Montreal Pierre Elliott Trudeau Intl

Thu 10/16

6:55 am-5:10 pm

2 stops10h 15m

$377

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Fri 11/21

8:00 am-11:39 am

Nonstop3h 39m

Montreal Pierre Elliott Trudeau Intl

Sun 11/30

8:00 am-11:59 am

Nonstop3h 59m

$398

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Sat 10/4

6:05 pm-10:06 am

1 stop16h 01m

Montreal Pierre Elliott Trudeau Intl

Wed 10/15

9:28 am-10:25 pm

1 stop12h 57m

$399

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Sat 10/4

6:05 pm-10:06 am

1 stop16h 01m

Montreal Pierre Elliott Trudeau Intl

Tue 10/14

9:28 am-10:25 pm

1 stop12h 57m

$399

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Sat 10/4

2:39 pm-11:18 pm

1 stop8h 39m

Montreal Pierre Elliott Trudeau Intl

Thu 10/16

6:40 pm-12:29 am

1 stop5h 49m

$408

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Fri 9/19

7:45 am-4:10 pm

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Wed 9/24

9:30 am-1:20 pm

Nonstop3h 50m

$408

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Wed 10/15

6:00 am-1:09 pm

1 stop7h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 10/22

9:30 am-1:20 pm

Nonstop3h 50m

$408

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Thu 10/16

6:00 am-1:09 pm

1 stop7h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 10/22

9:30 am-1:20 pm

Nonstop3h 50m

$408

MiamiMontreal

MIA - YUL

MIAYUL

Miami

Fri 12/5

6:05 am-9:42 pm

1 stop15h 37m

Montreal Pierre Elliott Trudeau Intl

Mon 12/8

6:30 pm-10:29 pm

Nonstop3h 59m

$408

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 22 results
1
2
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Best time to book a flight from Key Largo to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from Key Largo 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 Key Largo to Montreal

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Montreal. Price data was last updated on September 12, 2025.

The price you pay for your flight from Key Largo to Montreal may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Key Largo to Montreal (average of $270). Flying from Key Largo to Montreal in July is currently the most expensive (average of $409). 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 KE9 to YMQ?

Find hourly flight availability from Key Largo to Montreal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Key Largo to Montreal, 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 Key Largo to Montreal?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Montreal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Montreal flight should consider departing on Friday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to Montreal

Explore weekly flight availability from Key Largo to Montreal. 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 September 16, 2025.

The most flights from KE9 to YMQ are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Montreal

Get insights into the airlines that provide service to Montreal. 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 Montreal. Reviews last updated September 16, 2025.
Read reviews from past customers who have flown Delta, Porter Airlines, and American Airlines from Key Largo to Montreal. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Porter Airlines
7.9
Good
363 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Flair Airlines
6.0
Okay
249 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Montreal. 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 Key Largo to Montreal?

    Departing from Key Largo to Montreal will take you 3h 39m. Key Largo and Montreal are separated by a distance of 1405 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The top 3 most reliable airlines when flying from Key Largo to Montreal are Avianca (87%), Air Canada (58%) and Air Canada Rouge (58%).

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

    While on average a flight from Key Largo to Montreal is generally $578, our data shows the cheapest flight currently is $172. When looking at the most popular route, (Miami - Montreal Pierre Elliott Trudeau Intl), you can expect to pay $297 for that flight.

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

    Yes. In addition to deals on Key Largo to Montreal flights, Cheapflights offers vacation packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Montreal.

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

    Yes. Cheapflights offers flight deals from Key Largo to Montreal 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 Key Largo to Montreal?

    Currently, January is the cheapest month in which you can book a flight from Key Largo to Montreal (average of $270). Flying from Key Largo to Montreal in July is currently the most expensive (average of $409). 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 Key Largo to Montreal

Discover the top 8 airlines that operate flights from Key Largo to Montreal. 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 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapest$32Average$193FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$68Average$256FlexibilityNo cancel feeOn-time69%
Porter AirlinesCheapest$79Average$218FlexibilityNo cancel feeOn-time52%
Air TransatCheapest$88Average$270FlexibilityNo cancel feeOn-time50%
Air CanadaCheapest$89Average$352FlexibilityNo cancel feeOn-time67%
DeltaCheapest$132Average$361FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$212Average$391FlexibilityNo cancel feeOn-time71%
WestJetCheapest$324Average$463FlexibilityNo cancel feeOn-time60%

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