Cheap flights from Montreal to Key Largo from C$ 238
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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
7 Feb — 14 Feb1
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 31 days in advance, depart on a Thursday or Wednesday and return on a Saturday
Cheap 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 January 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 8 January 2026.
Wed 21/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 26/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 340
Mon 9/31:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 16/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 8/1C$ 341
Sat 7/26:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 12/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 343
Thu 29/16:00 a.m.YUL - MIA
2 stops15h 54mUnited Airlines
Sat 7/26:00 a.m.MIA - YUL
1 stop7h 28mUnited Airlines
Deal found 7/1C$ 344
Mon 26/18:50 a.m.YUL - MIA
2 stops11h 30mAir Canada
Wed 4/27:25 a.m.MIA - YUL
2 stops8h 15mAir Canada
Deal found 7/1C$ 346
Wed 11/39:20 a.m.YUL - MIA
1 stop9h 31mDelta
Wed 18/312:01 p.m.MIA - YUL
1 stop5h 30mDelta
Deal found 8/1C$ 347
Wed 28/16:02 p.m.YUL - MIA
1 stop6h 49mDelta
Tue 3/27:00 a.m.MIA - YUL
1 stop6h 22mDelta
Deal found 7/1C$ 348
Mon 26/13:00 p.m.YUL - MIA
1 stop7h 20mUnited Airlines
Wed 4/21:45 p.m.MIA - YUL
1 stop6h 03mUnited Airlines
Deal found 7/1C$ 350
Mon 26/14:35 p.m.YUL - MIA
1 stop7h 41mAir Canada
Thu 29/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 351
Mon 6/47:40 a.m.YUL - MIA
Nonstop3h 47mAir Canada
Tue 14/412:25 p.m.MIA - YUL
1 stop5h 58mAir Canada
Deal found 6/1C$ 352
Wed 11/25:10 p.m.YUL - MIA
1 stop7h 06mAir Canada
Wed 18/28:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 354
Wed 4/38:50 a.m.YUL - MIA
2 stops11h 26mAir Canada
Wed 18/37:25 a.m.MIA - YUL
2 stops8h 15mAir Canada
Deal found 7/1C$ 355
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 January 2026.
Tue 24/36:00 a.m.YUL - MIA
1 stop7h 15mUnited Airlines
Tue 31/39:15 a.m.MIA - YUL
1 stop6h 55mUnited Airlines
Deal found 8/1C$ 347
Mon 6/46:00 a.m.YUL - MIA
1 stop11h 08mDelta
Tue 14/46:00 a.m.MIA - YUL
1 stop5h 41mDelta
Deal found 6/1C$ 348
Tue 7/411:23 a.m.YUL - MIA
1 stop5h 41mUnited Airlines
Thu 9/46:00 p.m.MIA - YUL
1 stop6h 13mUnited Airlines
Deal found 6/1C$ 348
Sun 22/26:00 p.m.YUL - MIA
1 stop6h 53mDelta
Sat 28/27:00 a.m.MIA - YUL
1 stop6h 36mDelta
Deal found 6/1C$ 348
Thu 29/16:00 a.m.YUL - MIA
2 stops15h 54mUnited Airlines
Wed 4/21:45 p.m.MIA - YUL
1 stop6h 03mUnited Airlines
Deal found 6/1C$ 348
Fri 23/12:15 p.m.YUL - MIA
1 stop9h 05mDelta
Sun 1/25:50 a.m.MIA - YUL
1 stop5h 55mDelta
Deal found 6/1C$ 348
Wed 11/36:00 a.m.YUL - MIA
1 stop7h 15mUnited Airlines
Tue 17/37:00 a.m.MIA - YUL
1 stop6h 28mUnited Airlines
Deal found 6/1C$ 348
Tue 27/12:15 p.m.YUL - MIA
1 stop9h 05mDelta
Fri 30/15:50 a.m.MIA - YUL
1 stop5h 55mDelta
Deal found 7/1C$ 348
Wed 18/212:30 p.m.YUL - MIA
1 stop8h 14mDelta
Thu 5/36:00 a.m.MIA - YUL
1 stop5h 25mDelta
Deal found 6/1C$ 348
Wed 11/36:45 p.m.YUL - MIA
1 stop6h 11mDelta
Tue 17/34:44 p.m.MIA - YUL
1 stop7h 15mDelta
Deal found 7/1C$ 348
Thu 19/312:42 p.m.YUL - MIA
1 stop8h 08mDelta
Thu 26/37:00 a.m.MIA - YUL
1 stop6h 37mDelta
Deal found 6/1C$ 348
Tue 10/27:00 a.m.YUL - MIA
1 stop7h 18mDelta
Tue 24/23:20 p.m.MIA - YUL
1 stop8h 25mDelta
Deal found 7/1C$ 348
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 January 2026.
Wed 21/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 26/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 340
Mon 9/31:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 16/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 8/1C$ 341
Sat 7/26:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 12/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 343
Sun 25/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Wed 27/56:00 p.m.MIA - YUL
Nonstop3h 40mAir Canada
Deal found 6/1C$ 359
Thu 22/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Tue 24/312:25 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 361
Thu 5/37:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 12/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 5/1C$ 362
Thu 19/26:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Tue 3/36:15 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/1C$ 364
Thu 29/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 2/28:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 5/1C$ 365
Tue 20/17:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Tue 10/26:15 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 369
Sat 21/26:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Sat 28/28:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 373
Wed 18/37:40 a.m.YUL - MIA
Nonstop3h 59mAir Canada
Fri 27/36:15 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 375
Wed 18/26:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Mon 23/212:25 p.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 8/1C$ 376
Last-minute flights from Montreal to Key Largo
Discover last-minute flight deals from Montreal to Key Largo. Data last updated 8 January 2026 and is based on user searches.
Wed 21/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 26/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 340
Wed 21/18:50 a.m.YUL - MIA
2 stops11h 30mAir Canada
Fri 23/112:20 p.m.MIA - YUL
2 stops8h 25mAir Canada
Deal found 6/1C$ 355
Mon 26/18:50 a.m.YUL - MIA
2 stops11h 30mAir Canada
Wed 4/27:25 a.m.MIA - YUL
2 stops8h 15mAir Canada
Deal found 7/1C$ 346
Mon 26/13:00 p.m.YUL - MIA
1 stop7h 20mUnited Airlines
Wed 4/22:32 p.m.MIA - YUL
1 stop7h 10mUnited Airlines
Deal found 7/1C$ 350
Mon 26/14:35 p.m.YUL - MIA
1 stop7h 41mAir Canada
Thu 29/18:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 351
Wed 28/16:02 p.m.YUL - MIA
1 stop6h 49mDelta
Tue 3/27:00 a.m.MIA - YUL
1 stop6h 22mDelta
Deal found 7/1C$ 348
Thu 29/16:00 a.m.YUL - MIA
2 stops15h 54mUnited Airlines
Sat 7/26:00 a.m.MIA - YUL
1 stop7h 28mUnited Airlines
Deal found 7/1C$ 344
Sat 7/26:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Thu 12/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 343
Sun 8/25:10 p.m.YUL - MIA
1 stop7h 06mAir Canada
Wed 11/312:20 p.m.MIA - YUL
2 stops8h 25mAir Canada
Deal found 7/1C$ 347
Mon 9/212:10 p.m.YUL - MIA
1 stop8h 10mAir Canada
Fri 13/34:20 p.m.MIA - YUL
1 stop7h 32mAir Canada
Deal found 7/1C$ 341
Wed 11/25:10 p.m.YUL - MIA
1 stop7h 06mAir Canada
Wed 18/28:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 7/1C$ 354
Wed 18/24:35 p.m.YUL - MIA
1 stop7h 41mAir Canada
Thu 5/38:00 a.m.MIA - YUL
Nonstop3h 39mAir Canada
Deal found 6/1C$ 352
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 January 2026.
Thu 5/38:50 a.m.YUL - MIA
2 stops11h 26mAir Canada
Deal found 7/1C$ 238
Sat 31/110:15 a.m.YUL - MIA
2 stops13h 01mMultiple Airlines
Deal found 6/1C$ 239
Thu 26/37:00 a.m.YUL - MIA
1 stop8h 21mAir Canada
Deal found 7/1C$ 241
Tue 27/110:15 a.m.YUL - MIA
2 stops13h 44mMultiple Airlines
Deal found 6/1C$ 242
Fri 30/110:15 a.m.YUL - MIA
2 stops28h 06mMultiple Airlines
Deal found 6/1C$ 243
Sat 24/16:30 p.m.YUL - MIA
Nonstop3h 59mAir Canada
Deal found 7/1C$ 245
Mon 2/34:00 p.m.YUL - MIA
3 stops20h 16mMultiple Airlines
Deal found 5/1C$ 246
Sat 24/110:15 a.m.YUL - MIA
2 stops13h 01mMultiple Airlines
Deal found 7/1C$ 247
Wed 28/110:45 a.m.YUL - MIA
3 stops24h 14mMultiple Airlines
Deal found 6/1C$ 249
Thu 29/17:00 a.m.YUL - MIA
1 stop7h 18mDelta
Deal found 6/1C$ 250
Sun 25/18:00 a.m.YUL - MIA
2 stops27h 56mMultiple Airlines
Deal found 7/1C$ 252
Thu 26/28:55 a.m.YUL - MIA
2 stops11h 18mMultiple Airlines
Deal found 7/1C$ 253
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 8 January 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
Tue 24/3
6:00 a.m.-1:15 p.m.
1 stop7h 15m
Miami
Tue 31/3
9:15 a.m.-4:10 p.m.
1 stop6h 55m
C$ 347
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Mon 6/4
6:00 a.m.-5:08 p.m.
1 stop11h 08m
Miami
Tue 14/4
6:00 a.m.-11:41 a.m.
1 stop5h 41m
C$ 348
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Tue 7/4
11:23 a.m.-5:04 p.m.
1 stop5h 41m
Miami
Thu 9/4
6:00 p.m.-12:13 a.m.
1 stop6h 13m
C$ 348
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$ 348
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Thu 29/1
6:00 a.m.-9:54 p.m.
2 stops15h 54m
Miami
Wed 4/2
1:45 p.m.-7:48 p.m.
1 stop6h 03m
C$ 348
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Fri 23/1
2:15 p.m.-11:20 p.m.
1 stop9h 05m
Miami
Sun 1/2
5:50 a.m.-11:45 a.m.
1 stop5h 55m
C$ 348
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Wed 11/3
6:00 a.m.-1:15 p.m.
1 stop7h 15m
Miami
Tue 17/3
7:00 a.m.-1:28 p.m.
1 stop6h 28m
C$ 348
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Tue 27/1
2:15 p.m.-11:20 p.m.
1 stop9h 05m
Miami
Fri 30/1
5:50 a.m.-11:45 a.m.
1 stop5h 55m
C$ 348
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Wed 18/2
12:30 p.m.-8:44 p.m.
1 stop8h 14m
Miami
Thu 5/3
6:00 a.m.-11:25 a.m.
1 stop5h 25m
C$ 348
MontrealMiami
YUL - MIA
YULMIA
Montreal Pierre Elliott Trudeau Intl
Wed 11/3
6:45 p.m.-12:56 a.m.
1 stop6h 11m
Miami
Tue 17/3
4:44 p.m.-11:59 p.m.
1 stop7h 15m
C$ 348
Flights are sorted by cheapest round-trip flights first.
Deals found on 7/1
Showing 1-10 of 24 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 2 January 2026.
Booking 31 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$ 115). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 202). 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 January 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 3 January 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. Saturday 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 8 January 2026.
The most flights from YMQ to KE9 are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, 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 8 January 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.
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 7h 15m. United Airlines provides one of the quickest options available for as low as C$ 347. 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$ 212 on Porter Airlines and Air Canada, 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%), Air Canada (72%), Avianca (59%).
What are the cheapest flights from Montreal to Key Largo?
While on average a flight from Montreal to Key Largo is generally C$ 540, our data shows the cheapest flight currently is C$ 244. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 325 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$ 115). Flying from Montreal to Key Largo in July is currently the most expensive (average of C$ 202). 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.
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 January 2026.
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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