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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 21/11. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
29 Jul — 5 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to Key Largo are usually found in June or July, booked 49 days in advance, depart on a Sunday or Tuesday and return on a Thursday

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 29 June 2026.

Sun 6/128:15 a.m.
YUL
-
MIA
Nonstop4h 06m
Air Canada
Fri 18/128:00 a.m.
MIA
-
YUL
Nonstop3h 32m
Air Canada
Deal found 24/6C$ 400
Wed 19/81:10 p.m.
YUL
-
MIA
1 stop7h 38m
Air Canada
Wed 26/88:15 a.m.
MIA
-
YUL
Nonstop3h 28m
Air Canada
Deal found 29/6C$ 402
Sun 20/96:30 p.m.
YUL
-
MIA
Nonstop3h 47m
Air Canada
Wed 30/97:55 a.m.
MIA
-
YUL
Nonstop3h 33m
Air Canada
Deal found 29/6C$ 403
Mon 13/76:30 p.m.
YUL
-
MIA
Nonstop3h 41m
Air Canada
Tue 21/76:00 p.m.
MIA
-
YUL
Nonstop3h 35m
Air Canada
Deal found 25/6C$ 406
Mon 31/86:30 p.m.
YUL
-
MIA
Nonstop3h 41m
Air Canada
Thu 1/108:15 a.m.
MIA
-
YUL
Nonstop3h 30m
Air Canada
Deal found 25/6C$ 407

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 29 June 2026.

Round-trip from

C$ 400

One-way from

C$ 260

Popular in

December

Cheapest in

June

Average price

C$ 508
Air Canada
  • Air Canada
  • 6/12-18/12
  • Nonstop
  • 7h 38m total
  • Montreal to Key Largo
Search Deals
United Airlines
  • United Airlines
  • 21/11
  • 1 total stop
  • 14h 39m total
  • Montreal to Key Largo
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 29 June 2026.
Use the filters below to find and compare flights from Montreal to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 6/12

7:00 a.m.-8:37 p.m.

1 stop13h 37m

Miami

Fri 18/12

8:00 a.m.-11:32 a.m.

Nonstop3h 32m

C$ 440
Quickest round-trip

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 12/9

3:25 p.m.-11:44 p.m.

1 stop8h 19m

Miami

Sun 27/9

7:00 a.m.-1:09 p.m.

1 stop6h 09m

C$ 440

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

9:15 a.m.-6:52 p.m.

2 stops9h 37m

Miami

Tue 29/9

12:29 p.m.-9:26 p.m.

1 stop8h 57m

C$ 440

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 25/9

6:47 p.m.-12:55 a.m.

1 stop6h 08m

Miami

Mon 28/9

8:25 a.m.-5:38 p.m.

1 stop9h 13m

C$ 442

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 20/9

6:00 a.m.-12:06 p.m.

1 stop6h 06m

Miami

Wed 30/9

8:25 a.m.-5:38 p.m.

1 stop9h 13m

C$ 442

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 13/11

7:00 a.m.-11:47 p.m.

1 stop16h 47m

Miami

Fri 20/11

1:25 p.m.-5:05 p.m.

Nonstop3h 40m

C$ 442

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 23/7

6:10 a.m.-10:27 p.m.

1 stop16h 17m

Miami

Tue 28/7

12:30 p.m.-9:26 p.m.

1 stop8h 56m

C$ 451

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

3:25 p.m.-11:44 p.m.

1 stop8h 19m

Miami

Wed 26/8

7:00 a.m.-1:09 p.m.

1 stop6h 09m

C$ 454

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 16/7

9:45 a.m.-10:27 p.m.

1 stop12h 42m

Miami

Mon 20/7

5:32 p.m.-10:40 a.m.

1 stop17h 08m

C$ 454

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

6:00 a.m.-12:17 p.m.

1 stop6h 17m

Miami

Tue 25/8

2:08 p.m.-11:52 p.m.

1 stop9h 44m

C$ 456

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/6

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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

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 29 June 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 afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 34% on airfare.

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 29 June 2026.

The most flights from YMQ to KE9 are scheduled on a Monday (5 on average). You will have fewer flight options on Thursday, 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?

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 27 June 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. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 29 June 2026.
Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andWestJet 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
441 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Porter Airlines
8.0
Very good
441 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
United Airlines
7.4
Good
9,895 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
WestJet
7.2
Good
3,388 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
American Airlines
7.1
Good
11,764 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Air Canada
7.1
Good
11,272 reviews
Porter Airlines
8.0
Very good
441 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.5

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.

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. United Airlines provides one of the quickest options available for as low as C$ 442. 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$ 185. Users have also found prices from C$ 230 and C$ 237 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 (86%), American Airlines (84%), Qatar Airways (84%).

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

    While on average a flight from Montreal to Key Largo is generally C$ 1,086, our data shows the cheapest flight currently is C$ 252. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 403 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.

See more FAQs

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Alternative routes for Montreal to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Montreal to Key Largo

Discover the top 7 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 29 June 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 154AverageC$ 431FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 157AverageC$ 534FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 164AverageC$ 533FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 181AverageC$ 469FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapestC$ 187AverageC$ 455FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 187AverageC$ 505FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 209AverageC$ 571FlexibilityNo 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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