Cheap flights from Montreal to Key Largo from C$ 260
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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
14 Jan — 21 Jan1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to Key Largo are usually found in April or June, booked 88 days in advance, depart on a Thursday or Tuesday 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 15 December 2025.
Mon 15/127:00 a.m.YUL - MIA
1 stop10h 25mDelta
Tue 16/125:33 p.m.MIA - YUL
1 stop5h 59mDelta
Deal found 15/12C$ 490
Mon 15/128:50 a.m.YUL - MIA
2 stops11h 26mAir Canada
Wed 24/121:20 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 13/12C$ 492
Mon 15/127:00 a.m.YUL - MIA
2 stops9h 27mAmerican Airlines
Tue 16/127:04 a.m.MIA - YUL
1 stop15h 36mAmerican Airlines
Deal found 14/12C$ 496
Mon 15/128:50 a.m.YUL - MIA
2 stops11h 26mAir Canada
Thu 25/1212:20 p.m.MIA - YUL
1 stop6h 03mAir Canada
Deal found 13/12C$ 501
Mon 15/127:00 a.m.YUL - MIA
1 stop13h 56mAmerican Airlines
Mon 22/129:44 p.m.MIA - YUL
1 stop16h 02mAmerican Airlines
Deal found 14/12C$ 503
Mon 15/1211:10 a.m.YUL - MIA
1 stop9h 06mAir Canada
Tue 16/128:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 14/12C$ 504
Sun 14/126:00 a.m.YUL - MIA
1 stop9h 10mUnited Airlines
Thu 25/122:10 p.m.MIA - YUL
1 stop7h 07mUnited Airlines
Deal found 13/12C$ 523
Mon 15/128:50 a.m.YUL - MIA
2 stops15h 26mAir Canada
Mon 22/128:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 14/12C$ 533
Sun 14/1211:00 p.m.YUL - MIA
1 stop16h 21mAir Canada
Sun 21/128:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 13/12C$ 537
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 15 December 2025.
Wed 7/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Wed 14/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 14/12C$ 443
Sat 24/13:00 p.m.YUL - MIA
1 stop7h 20mUnited Airlines
Tue 3/29:00 a.m.MIA - YUL
1 stop12h 17mUnited Airlines
Deal found 13/12C$ 490
Mon 6/46:45 p.m.YUL - MIA
1 stop6h 08mDelta
Tue 14/48:05 a.m.MIA - YUL
1 stop7h 56mDelta
Deal found 13/12C$ 490
Thu 8/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Tue 13/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 14/12C$ 459
Fri 30/13:00 p.m.YUL - MIA
1 stop7h 20mUnited Airlines
Sat 7/27:15 a.m.MIA - YUL
1 stop6h 13mUnited Airlines
Deal found 15/12C$ 490
Fri 1/56:15 p.m.YUL - MIA
1 stop6h 41mDelta
Thu 7/58:05 a.m.MIA - YUL
1 stop9h 02mDelta
Deal found 13/12C$ 490
Mon 27/43:41 p.m.YUL - MIA
1 stop7h 03mUnited Airlines
Tue 5/52:20 p.m.MIA - YUL
1 stop7h 20mUnited Airlines
Deal found 13/12C$ 490
Sat 17/16:00 a.m.YUL - MIA
2 stops16h 20mUnited Airlines
Sat 24/17:15 a.m.MIA - YUL
1 stop6h 13mUnited Airlines
Deal found 12/12C$ 490
Mon 26/13:00 p.m.YUL - MIA
1 stop7h 20mUnited Airlines
Fri 30/16:00 a.m.MIA - YUL
1 stop7h 28mUnited Airlines
Deal found 14/12C$ 490
Wed 28/16:00 a.m.YUL - MIA
2 stops15h 54mUnited Airlines
Tue 3/21:45 p.m.MIA - YUL
1 stop6h 03mUnited Airlines
Deal found 13/12C$ 490
Wed 13/511:00 a.m.YUL - MIA
1 stop6h 12mUnited Airlines
Sat 30/510:20 a.m.MIA - YUL
1 stop6h 01mUnited Airlines
Deal found 14/12C$ 490
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 15 December 2025.
Thu 29/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 5/26:15 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 15/12C$ 431
Mon 12/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Fri 23/112:25 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 12/12C$ 449
Tue 27/17:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Tue 3/28:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 13/12C$ 453
Wed 7/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Wed 14/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 15/12C$ 454
Sun 8/21:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Tue 17/28:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 14/12C$ 456
Thu 5/27:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Fri 6/28:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 14/12C$ 478
Mon 12/17:00 a.m.YUL - MIA
Nonstop4h 20mAmerican Airlines
Fri 23/17:45 p.m.MIA - YUL
Nonstop3h 39mAmerican Airlines
Deal found 12/12C$ 482
Mon 26/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Wed 28/112:25 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 14/12C$ 483
Sat 10/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Fri 16/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 12/12C$ 486
Wed 28/17:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 2/26:15 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 15/12C$ 489
Sun 11/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 19/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 13/12C$ 490
Tue 13/17:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Sat 24/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 12/12C$ 493
Last-minute flights from Montreal to Key Largo
Discover last-minute flight deals from Montreal to Key Largo. Data last updated 15 December 2025 and is based on user searches.
Tue 6/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Tue 13/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 13/12C$ 427
Wed 7/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Wed 14/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 15/12C$ 403
Wed 7/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Tue 20/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 14/12C$ 406
Thu 8/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Wed 14/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 13/12C$ 417
Mon 12/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Wed 4/22:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 15/12C$ 402
Mon 12/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Fri 16/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 13/12C$ 421
Tue 13/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Fri 23/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 13/12C$ 401
Tue 13/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Tue 20/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 14/12C$ 416
Mon 19/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Wed 4/22:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 14/12C$ 424
Sun 25/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Tue 3/22:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 13/12C$ 425
Mon 26/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Wed 18/22:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 13/12C$ 420
Mon 26/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Fri 30/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 14/12C$ 423
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 15 December 2025.
Wed 18/26:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Deal found 15/12C$ 260
Tue 13/110:15 a.m.YUL - MIA
2 stops13h 44mMultiple Airlines
Deal found 15/12C$ 262
Mon 5/16:45 a.m.YUL - MIA
2 stops10h 09mMultiple Airlines
Deal found 13/12C$ 263
Tue 13/17:00 a.m.YUL - MIA
Nonstop4h 20mAmerican Airlines
Deal found 14/12C$ 264
Fri 9/14:00 p.m.YUL - MIA
2 stops28h 13mMultiple Airlines
Deal found 13/12C$ 266
Fri 16/14:00 p.m.YUL - MIA
2 stops28h 13mMultiple Airlines
Deal found 15/12C$ 267
Wed 14/18:55 a.m.YUL - MIA
2 stops15h 04mMultiple Airlines
Deal found 13/12C$ 268
Tue 6/14:00 p.m.YUL - MIA
2 stops17h 35mMultiple Airlines
Deal found 13/12C$ 270
Sun 11/18:00 a.m.YUL - MIA
2 stops27h 56mMultiple Airlines
Deal found 12/12C$ 275
Thu 15/18:00 a.m.YUL - MIA
2 stops16h 42mMultiple Airlines
Deal found 15/12C$ 277
Sun 15/28:00 a.m.YUL - MIA
2 stops28h 08mMultiple Airlines
Deal found 15/12C$ 278
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 15 December 2025.
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 15 December 2025.
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
Wed 7/1
6:45 a.m.-1:09 p.m.
1 stop6h 24m
Miami
Wed 14/1
2:10 p.m.-8:55 p.m.
1 stop6h 45m
C$ 443
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Thu 8/1
6:45 a.m.-1:09 p.m.
1 stop6h 24m
Miami
Tue 13/1
2:10 p.m.-8:55 p.m.
1 stop6h 45m
C$ 459
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Sat 24/1
3:00 p.m.-10:20 p.m.
1 stop7h 20m
Miami
Tue 3/2
9:00 a.m.-9:17 p.m.
1 stop12h 17m
C$ 490
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Mon 6/4
6:45 p.m.-12:53 a.m.
1 stop6h 08m
Miami
Tue 14/4
8:05 a.m.-4:01 p.m.
1 stop7h 56m
C$ 490
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Fri 30/1
3:00 p.m.-10:20 p.m.
1 stop7h 20m
Miami
Sat 7/2
7:15 a.m.-1:28 p.m.
1 stop6h 13m
C$ 490
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Fri 1/5
6:15 p.m.-12:56 a.m.
1 stop6h 41m
Miami
Thu 7/5
8:05 a.m.-5:07 p.m.
1 stop9h 02m
C$ 490
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Mon 27/4
3:41 p.m.-10:44 p.m.
1 stop7h 03m
Miami
Tue 5/5
2:20 p.m.-9:40 p.m.
1 stop7h 20m
C$ 490
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Sat 17/1
6:00 a.m.-10:20 p.m.
2 stops16h 20m
Miami
Sat 24/1
7:15 a.m.-1:28 p.m.
1 stop6h 13m
C$ 490
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Mon 26/1
3:00 p.m.-10:20 p.m.
1 stop7h 20m
Miami
Fri 30/1
6:00 a.m.-1:28 p.m.
1 stop7h 28m
C$ 490
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Wed 28/1
6:00 a.m.-9:54 p.m.
2 stops15h 54m
Miami
Tue 3/2
1:45 p.m.-7:48 p.m.
1 stop6h 03m
C$ 490
Flights are sorted by cheapest round-trip flights first.
Deals found on 14/12
Showing 1-10 of 22 results
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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 12 December 2025.
Booking 88 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$ 116). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 196). 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 15 December 2025.
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 45% 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 16 December 2024.
Travelers seeking maximum savings on their Montreal to Key Largo flight should consider departing on Monday afternoons when fares are most often at their lowest. Saturday at noon 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 15 December 2025.
The most flights from YMQ to KE9 are scheduled on a Monday (4 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 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 15 December 2025.
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.
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 08m. Porter Airlines provides one of the quickest options available for as low as C$ 490. 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$ 145. Users have also found prices from C$ 153 and C$ 203 on Porter 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: Avion Express (100%), Air Canada Rouge (96%), Air Canada (87%).
What are the cheapest flights from Montreal to Key Largo?
While on average a flight from Montreal to Key Largo is generally C$ 528, 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$ 402 for that flight.
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$ 116). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 196). 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.
Browse through other flights departing from Montreal. Flights are based on user searches made on Cheapflights and were last updated on 15 December 2025.
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 15 December 2025.
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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