Cheap flights from Montreal to Key Largo from C$ 258
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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
7 Jan — 14 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 Wednesday 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 8 December 2025.
Mon 8/123:35 p.m.YUL - MIA
2 stops8h 41mAir Canada
Tue 16/1212:20 p.m.MIA - YUL
2 stops8h 30mAir Canada
Deal found 7/12C$ 445
Wed 10/128:35 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 11/128:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/12C$ 452
Sun 7/126:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Wed 10/124:20 p.m.MIA - YUL
1 stop7h 32mAir Canada
Deal found 5/12C$ 455
Tue 9/125:10 p.m.YUL - MIA
1 stop7h 06mAir Canada
Thu 11/127:25 a.m.MIA - YUL
1 stop6h 57mAir Canada
Deal found 6/12C$ 463
Mon 15/1211:10 a.m.YUL - MIA
1 stop9h 06mAir Canada
Wed 17/121:20 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 5/12C$ 467
Tue 9/128:35 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Wed 10/124:20 p.m.MIA - YUL
1 stop7h 32mAir Canada
Deal found 7/12C$ 468
Sun 7/126:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Sun 14/128:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/12C$ 478
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 8 December 2025.
Tue 10/36:45 p.m.YUL - MIA
1 stop6h 08mDelta
Thu 12/311:30 a.m.MIA - YUL
1 stop7h 05mDelta
Deal found 5/12C$ 488
Mon 12/19:15 a.m.YUL - MIA
1 stop7h 07mUnited Airlines
Wed 21/17:15 a.m.MIA - YUL
1 stop6h 13mUnited Airlines
Deal found 5/12C$ 488
Fri 6/32:29 p.m.YUL - MIA
1 stop6h 41mDelta
Thu 12/310:26 a.m.MIA - YUL
1 stop7h 04mDelta
Deal found 5/12C$ 488
Fri 9/13:00 p.m.YUL - MIA
1 stop8h 59mUnited Airlines
Sat 17/17:15 a.m.MIA - YUL
1 stop6h 13mUnited Airlines
Deal found 6/12C$ 489
Thu 5/36:00 p.m.YUL - MIA
1 stop6h 53mDelta
Tue 17/33:17 p.m.MIA - YUL
1 stop8h 42mDelta
Deal found 5/12C$ 488
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 6/12C$ 489
Thu 5/312:30 p.m.YUL - MIA
1 stop8h 14mDelta
Sat 14/36:00 a.m.MIA - YUL
1 stop5h 32mDelta
Deal found 5/12C$ 488
Sun 8/37:00 a.m.YUL - MIA
1 stop8h 37mDelta
Sat 14/36:00 a.m.MIA - YUL
1 stop5h 32mDelta
Deal found 5/12C$ 488
Fri 1/56:15 p.m.YUL - MIA
1 stop6h 41mDelta
Thu 7/58:05 a.m.MIA - YUL
1 stop9h 02mDelta
Deal found 6/12C$ 489
Sun 22/26:00 p.m.YUL - MIA
1 stop6h 53mDelta
Sat 28/27:00 a.m.MIA - YUL
1 stop6h 36mDelta
Deal found 6/12C$ 489
Mon 2/36:00 a.m.YUL - MIA
1 stop11h 29mDelta
Thu 5/310:33 a.m.MIA - YUL
1 stop6h 20mDelta
Deal found 6/12C$ 489
Tue 31/32:29 p.m.YUL - MIA
1 stop8h 49mDelta
Tue 7/47:00 a.m.MIA - YUL
1 stop10h 30mDelta
Deal found 6/12C$ 489
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 8 December 2025.
Mon 4/58:00 a.m.YUL - MIA
Nonstop3h 41mAir Canada
Fri 8/58:10 a.m.MIA - YUL
Nonstop3h 32mAir Canada
Deal found 8/12C$ 423
Mon 19/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Fri 30/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 5/12C$ 446
Mon 12/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 19/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/12C$ 448
Tue 31/31:30 p.m.YUL - MIA
Nonstop3h 47mAir Canada
Thu 9/48:00 a.m.MIA - YUL
Nonstop3h 40mAir Canada
Deal found 7/12C$ 452
Wed 4/37:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Wed 25/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/12C$ 466
Wed 21/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Wed 28/112:25 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/12C$ 467
Mon 4/55:45 p.m.YUL - MIA
Nonstop3h 41mAir Canada
Tue 12/58:10 a.m.MIA - YUL
Nonstop3h 32mAir Canada
Deal found 7/12C$ 470
Thu 19/26:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Tue 3/36:15 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/12C$ 475
Sun 8/36:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 12/36:15 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 5/12C$ 479
Tue 24/21:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Tue 3/312:25 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/12C$ 481
Last-minute flights from Montreal to Key Largo
Discover last-minute flight deals from Montreal to Key Largo. Data last updated 8 December 2025 and is based on user searches.
Mon 8/123:35 p.m.YUL - MIA
2 stops8h 41mAir Canada
Tue 16/1212:20 p.m.MIA - YUL
2 stops8h 30mAir Canada
Deal found 7/12C$ 445
Sun 11/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Mon 19/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 6/12C$ 439
Mon 12/16:45 a.m.YUL - MIA
1 stop6h 24mMultiple Airlines
Wed 4/22:57 p.m.MIA - YUL
2 stops25h 25mMultiple Airlines
Deal found 6/12C$ 424
Mon 12/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Mon 19/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 6/12C$ 428
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 6/12C$ 438
Mon 12/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 19/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/12C$ 448
Thu 15/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Tue 20/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 7/12C$ 441
Sun 18/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Wed 28/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 6/12C$ 423
Mon 19/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Mon 26/12:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 7/12C$ 420
Thu 29/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Mon 9/22:10 p.m.MIA - YUL
1 stop6h 45mPorter Airlines
Deal found 7/12C$ 426
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 8 December 2025.
Sun 25/15:25 p.m.YUL - MIA
3 stops18h 31mMultiple Airlines
Deal found 7/12C$ 258
Fri 6/210:15 a.m.YUL - MIA
2 stops13h 44mMultiple Airlines
Deal found 8/12C$ 260
Sun 8/36:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Deal found 8/12C$ 261
Sun 8/21:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Deal found 8/12C$ 262
Thu 5/36:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Deal found 8/12C$ 264
Mon 5/15:10 p.m.YUL - MIA
1 stop16h 25mMultiple Airlines
Deal found 8/12C$ 265
Wed 7/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Deal found 6/12C$ 267
Mon 19/16:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Deal found 8/12C$ 268
Mon 16/28:00 a.m.YUL - MIA
2 stops30h 01mMultiple Airlines
Deal found 6/12C$ 269
Thu 5/26:45 a.m.YUL - MIA
1 stop6h 24mPorter Airlines
Deal found 7/12C$ 272
Thu 15/18:00 a.m.YUL - MIA
2 stops16h 42mMultiple Airlines
Deal found 6/12C$ 274
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 8 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 8 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
Tue 10/3
6:45 p.m.-12:53 a.m.
1 stop6h 08m
Miami
Thu 12/3
11:30 a.m.-6:35 p.m.
1 stop7h 05m
C$ 488
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Mon 12/1
9:15 a.m.-4:22 p.m.
1 stop7h 07m
Miami
Wed 21/1
7:15 a.m.-1:28 p.m.
1 stop6h 13m
C$ 488
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Fri 6/3
2:29 p.m.-9:10 p.m.
1 stop6h 41m
Miami
Thu 12/3
10:26 a.m.-5:30 p.m.
1 stop7h 04m
C$ 488
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Thu 5/3
6:00 p.m.-12:53 a.m.
1 stop6h 53m
Miami
Tue 17/3
3:17 p.m.-11:59 p.m.
1 stop8h 42m
C$ 488
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Thu 5/3
12:30 p.m.-8:44 p.m.
1 stop8h 14m
Miami
Sat 14/3
6:00 a.m.-11:32 a.m.
1 stop5h 32m
C$ 488
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Sun 8/3
7:00 a.m.-3:37 p.m.
1 stop8h 37m
Miami
Sat 14/3
6:00 a.m.-11:32 a.m.
1 stop5h 32m
C$ 488
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Fri 9/1
3:00 p.m.-11:59 p.m.
1 stop8h 59m
Miami
Sat 17/1
7:15 a.m.-1:28 p.m.
1 stop6h 13m
C$ 489
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$ 489
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$ 489
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Sun 22/2
6:00 p.m.-12:53 a.m.
1 stop6h 53m
Miami
Sat 28/2
7:00 a.m.-1:36 p.m.
1 stop6h 36m
C$ 489
Flights are sorted by cheapest round-trip flights first.
Deals found on 7/12
Showing 1-10 of 23 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 5 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 8 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 8 December 2025.
The most flights from YMQ to KE9 are scheduled on a Monday (4 on average). You will have fewer flight options on Tuesday, 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 8 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. Delta provides one of the quickest options available for as low as C$ 488. 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$ 146. Users have also found prices from C$ 153 and C$ 204 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$ 537, our data shows the cheapest flight currently is C$ 274. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 426 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 8 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 8 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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