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Cheap flights from Montreal to Key Largo from C$ 195

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — MIA
9 Apr — 16 Apr1
1 adult

Cheapflights Tip: The best prices from Montreal to Key Largo are usually found in April or May, booked 66 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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 4 April 2025.

Round-trip from

C$ 338

One-way from

C$ 195

Popular in

December

Cheapest in

April

Average price

C$ 414
Porter Airlines
  • Porter Airlines
  • 24/5-31/5
  • 2 total stops
  • 12h 12m total
  • Montreal to Key Largo
Search Deals
Porter Airlines
  • Porter Airlines
  • 20/4
  • 1 total stop
  • 6h 20m total
  • Montreal to Key Largo
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from Montreal to Key Largo

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 4 April 2025.

Sat 24/56:45 a.m.YUL - MIA
1 stop6h 10mPorter Airlines
Sat 31/51:55 p.m.MIA - YUL
1 stop6h 02mPorter Airlines
Deal found 3/4C$ 338
Mon 12/59:30 a.m.YUL - MIA
Nonstop3h 48mAir Canada
Thu 15/57:55 a.m.MIA - YUL
Nonstop3h 42mAir Canada
Deal found 3/4C$ 349
Thu 10/46:15 a.m.YUL - MIA
1 stop8h 40mMultiple Airlines
Thu 10/46:05 p.m.MIA - YUL
Nonstop3h 42mMultiple Airlines
Deal found 3/4C$ 363
Sat 19/46:35 p.m.YUL - MIA
1 stop16h 49mUnited Airlines
Sat 26/46:22 a.m.MIA - YUL
1 stop8h 02mUnited Airlines
Deal found 3/4C$ 384
Sat 26/46:00 a.m.YUL - MIA
1 stop10h 30mDelta
Thu 8/510:37 a.m.MIA - YUL
1 stop7h 03mDelta
Deal found 3/4C$ 393
Sat 24/57:00 a.m.YUL - MIA
Nonstop3h 40mAmerican Airlines
Sat 31/57:20 a.m.MIA - YUL
1 stop8h 05mAmerican Airlines
Deal found 3/4C$ 396
Fri 18/46:00 p.m.YUL - MIA
1 stop6h 48mWestJet
Mon 28/46:00 a.m.MIA - YUL
1 stop5h 33mWestJet
Deal found 3/4C$ 437

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 4 April 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

Sat 24/5

6:45 a.m.-12:55 p.m.

1 stop6h 10m

Miami

Sat 31/5

1:55 p.m.-7:57 p.m.

1 stop6h 02m

C$ 338

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Mon 12/5

9:30 a.m.-1:18 p.m.

Nonstop3h 48m

Miami

Thu 15/5

7:55 a.m.-11:37 a.m.

Nonstop3h 42m

C$ 349

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Thu 10/4

6:15 a.m.-2:55 p.m.

1 stop8h 40m

Miami

Thu 10/4

6:05 p.m.-9:47 p.m.

Nonstop3h 42m

C$ 363

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 19/4

6:35 p.m.-11:24 a.m.

1 stop16h 49m

Miami

Sat 26/4

6:22 a.m.-2:24 p.m.

1 stop8h 02m

C$ 384

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 13/4

7:00 a.m.-4:57 p.m.

1 stop9h 57m

Miami

Thu 17/4

8:10 a.m.-4:52 p.m.

1 stop8h 42m

C$ 392

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sat 24/5

7:00 a.m.-10:40 a.m.

Nonstop3h 40m

Miami

Sat 31/5

7:20 a.m.-3:25 p.m.

1 stop8h 05m

C$ 396

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Fri 18/4

6:00 p.m.-12:48 a.m.

1 stop6h 48m

Miami

Mon 28/4

6:00 a.m.-11:33 a.m.

1 stop5h 33m

C$ 437

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Sun 20/4

6:45 a.m.-1:05 p.m.

1 stop6h 20m

C$ 195

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Wed 23/4

9:00 a.m.-12:48 p.m.

Nonstop3h 48m

C$ 212

MontrealMiami

YUL - MIA

YULMIA

Montreal Pierre Elliott Trudeau Intl

Tue 3/6

6:35 p.m.-4:12 p.m.

1 stop21h 37m

C$ 221

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 15 results
1
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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 28 March 2025.

Booking 66 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, April is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 251). Flying from Montreal to Key Largo in August is currently the most expensive (average of C$ 369). 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 4 April 2025.

When flying from Montreal to Key Largo, 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 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 mornings 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 4 April 2025.

The most flights from YMQ to KE9 are scheduled on a Friday (7 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Key Largo by month

Plan your trip to Key Largo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key Largo ranges from 41.0 - 252.0 mm per month. September is typically the wettest month, when rainfall can reach 252.0 mm. January is typically the driest time to visit Key Largo when rainfall is around 41.0 mm.

Temperature in Key Largo by month

Plan your trip to Key Largo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key Largo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 20.0 C).

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 4 April 2025.
Peruse reviews from past customers who have flown with Delta, Porter Airlines and United Airlines from Montreal to Key Largo to help guide your decision. 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
7,897 reviews
Check prices

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
Porter Airlines
7.9
Good
279 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
United Airlines
7.4
Good
8,618 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.
WestJet
7.2
Good
2,795 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
4.0
Okay

Richard,Sep 2023

YYZ - ATL

Four hour delay (missing two screws). Seats in need of repair.

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.

  • 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$ 195. Users have also found prices from C$ 212 and C$ 233 on Air Canada and United Airlines, 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: American Airlines (77%), Qatar Airways (77%), Avianca (76%).

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

    While on average a flight from Montreal to Key Largo is generally C$ 759, our data shows the cheapest flight currently is C$ 218. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Miami), you can expect to pay C$ 346 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.

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

    Currently, April is the cheapest month in which you can book a flight from Montreal to Key Largo (average of C$ 251). Flying from Montreal to Key Largo in August is currently the most expensive (average of C$ 369). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Montreal to Key Largo

Discover the top 9 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 4 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 126AverageC$ 307FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 166AverageC$ 427FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 174AverageC$ 389FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 196AverageC$ 481FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 221AverageC$ 434FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
American AirlinesCheapestC$ 239AverageC$ 640FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 249AverageC$ 778FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 316AverageC$ 452FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJet EncoreCheapestC$ 649AverageC$ 798FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore 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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