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Niagara Falls

$123+ Cheap flights from Key Largo, FL to Niagara Falls, ON, Canada

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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — YYZ
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Niagara Falls are usually found in March or January, booked 86 days in advance, depart on a Thursday or Friday and return on a Tuesday

Find flight deals from Key Largo to Niagara Falls

Cheapest flights from Key Largo to Niagara Falls
Explore the most affordable flight options available from Key Largo to Niagara Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:30 amMIA - YYZ
2 stops17h 50mMultiple Airlines
Wed 12/319:40 amYYZ - MIA
Nonstop3h 29mMultiple Airlines
Deal found 10/28$276
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:19 pmMIA - YYZ
2 stops25h 01mMultiple Airlines
Wed 12/319:40 amYYZ - MIA
Nonstop3h 29mMultiple Airlines
Deal found 10/29$293
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:10 pmMIA - YYZ
Nonstop3h 20mPorter Airlines
Wed 12/319:40 amYYZ - MIA
Nonstop3h 29mPorter Airlines
Deal found 10/30$295
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/192:10 pmMIA - YYZ
Nonstop3h 20mPorter Airlines
Mon 1/59:40 amYYZ - MIA
Nonstop3h 29mPorter Airlines
Deal found 10/29$297
This Mytrip deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/139:05 pmMIA - YYZ
Nonstop3h 21mMultiple Airlines
Fri 11/219:40 amYYZ - MIA
Nonstop3h 29mMultiple Airlines
Deal found 10/29$299
This Tripair deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/269:05 pmMIA - YYZ
Nonstop3h 21mMultiple Airlines
Wed 12/319:40 amYYZ - MIA
Nonstop3h 29mMultiple Airlines
Deal found 10/30$301
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:10 pmMIA - YYZ
Nonstop3h 20mPorter Airlines
Tue 12/309:40 amYYZ - MIA
Nonstop3h 29mPorter Airlines
Deal found 10/29$304
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:10 pmMIA - YYZ
Nonstop3h 20mPorter Airlines
Wed 12/319:40 amYYZ - MIA
Nonstop3h 29mPorter Airlines
Deal found 10/28$305
This Trip.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/199:05 pmMIA - YYZ
Nonstop3h 21mAir Canada
Tue 11/2511:55 amYYZ - MIA
Nonstop3h 26mAir Canada
Deal found 10/28$308
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:10 pmMIA - YYZ
Nonstop3h 20mPorter Airlines
Mon 1/59:40 amYYZ - MIA
Nonstop3h 29mPorter Airlines
Deal found 10/29$322

Cheap flight deals from Key Largo to Niagara Falls

Keep the following information in mind while searching for Key Largo to Niagara Falls flight deals. Data was last updated October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$276
(Kiwi.com)

One-way from

$123
(Air Canada)

Popular in

October

Cheapest in

March

Average price

$414
Provider with most accurate pricing for Miami-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Toronto (YTO) flights.
Search Deals
From Key Largo to Niagara Falls
Search Deals
One-way flight from Key Largo to Niagara Falls
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Niagara Falls 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 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Key Largo to Niagara Falls that are best for you.

Fly from

Key Largo

Fly to

Niagara Falls

Route

Depart

Return

Price

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Thu 2/19

2:10 pm-5:30 pm

Nonstop3h 20m

Toronto Pearson Intl

Mon 2/23

9:40 am-1:09 pm

Nonstop3h 29m

$328

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Sat 11/29

2:10 pm-5:30 pm

Nonstop3h 20m

Toronto Pearson Intl

Sat 12/6

3:15 pm-11:21 pm

1 stop8h 06m

$359

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Wed 12/31

6:00 am-11:08 am

1 stop5h 08m

Toronto Pearson Intl

Thu 1/1

12:14 pm-10:08 pm

1 stop9h 54m

$377

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Tue 12/23

6:00 am-11:08 am

1 stop5h 08m

Toronto Pearson Intl

Mon 12/29

6:17 pm-12:48 am

1 stop6h 31m

$377

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Thu 1/15

9:05 pm-12:26 am

Nonstop3h 21m

Toronto Pearson Intl

Sun 1/25

8:00 am-11:25 am

Nonstop3h 25m

$406

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Thu 2/19

2:10 pm-5:30 pm

Nonstop3h 20m

Toronto Pearson Intl

Mon 2/23

7:15 am-1:55 pm

1 stop6h 40m

$411

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Sun 12/7

7:00 am-2:20 pm

1 stop7h 20m

Toronto Pearson Intl

Sun 12/14

8:50 pm-12:16 am

Nonstop3h 26m

$416

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Mon 1/12

1:50 pm-10:51 pm

1 stop9h 01m

Toronto Pearson Intl

Sat 1/24

6:00 am-5:53 pm

2 stops11h 53m

$418

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Wed 1/14

6:20 pm-11:58 pm

1 stop5h 38m

Toronto Pearson Intl

Sat 1/24

6:00 am-5:53 pm

2 stops11h 53m

$418

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Thu 1/15

7:00 am-4:12 pm

1 stop9h 12m

Toronto Pearson Intl

Sat 1/24

6:00 am-5:53 pm

2 stops11h 53m

$418

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 22 results
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Best time to book a flight from Key Largo to Niagara Falls

Have a flexible travel schedule? Discover the best time to fly to Niagara Falls from Key Largo 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 Key Largo to Niagara Falls

How far ahead should I book a flight from Key Largo to Niagara Falls?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Niagara Falls. Price data was last updated on October 24, 2025.

Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights from Key Largo to Niagara Falls. 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 Key Largo to Niagara Falls?

Currently, November is the cheapest month in which you can book a flight from Key Largo to Niagara Falls (average of $63). Flying from Key Largo to Niagara Falls in August is currently the most expensive (average of $107). 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 KE9 to NI4?

Find hourly flight availability from Key Largo to Niagara Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Key Largo to Niagara Falls in the evening. If you’re flexible enough to do this you can expect to save up to 42% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Key Largo to Niagara Falls?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Niagara Falls. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Niagara Falls flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Key Largo to Niagara Falls?

Reviews of airlines servicing Niagara Falls

Get insights into the airlines that provide service to Niagara Falls. 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 Niagara Falls. Reviews last updated October 30, 2025.
See what other customers who have flown with Porter Airlines, Delta, and American Airlines from Key Largo to Niagara Falls have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews

Food

7.6

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews

Food

7.6

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Delta
7.9
Good
7,999 reviews
Porter Airlines
8.0
Very good
384 reviews

Food

7.6

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
American Airlines
7.2
Good
11,034 reviews
Porter Airlines
8.0
Very good
384 reviews

Food

7.6

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,383 reviews
Porter Airlines
8.0
Very good
384 reviews

Food

7.6

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Flair Airlines
6.0
Okay
252 reviews
Porter Airlines
8.0
Very good
384 reviews

Food

7.6

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Niagara Falls. 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 Key Largo to Niagara Falls?

    Departing from Key Largo to Niagara Falls will take you 3h 20m. Key Largo and Niagara Falls are separated by a distance of 1235 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most reliable airlines from Key Largo to Niagara Falls?

    Consider Air Canada Rouge (83%), Brussels Airlines (79%) or American Airlines (72%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Niagara Falls.

  • What are the cheapest flights from Key Largo to Niagara Falls?

    Looking for the cheapest flight from Key Largo to Niagara Falls? While on average our users pay $519, our data indicates the cheapest price to be $96. The most popular route (Miami - Toronto Pearson Intl), is priced around $277.

  • Can I find deals for flights from Key Largo to Niagara Falls that include hotel bookings?

    Yes. In addition to deals on Key Largo to Niagara Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Niagara Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Niagara Falls.

  • Can I find deals for business class flights from Key Largo to Niagara Falls?

    Yes. Cheapflights offers flight deals from Key Largo to Niagara Falls 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 Key Largo to Niagara Falls?

    Currently, November is the cheapest month in which you can book a flight from Key Largo to Niagara Falls (average of $63). Flying from Key Largo to Niagara Falls in August is currently the most expensive (average of $107). 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.

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Top 8 airlines flying from Key Largo to Niagara Falls

Discover the top 8 airlines that operate flights from Key Largo to Niagara Falls. 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 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapest$22Average$143FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$85Average$308FlexibilityNo cancel feeOn-time67%
Porter AirlinesCheapest$94Average$247FlexibilityNo cancel feeOn-time52%
WestJetCheapest$101Average$309FlexibilityNo cancel feeOn-time60%
DeltaCheapest$129Average$376FlexibilityNo cancel feeOn-timeN/A
Air TransatCheapest$133Average$304FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$220Average$389FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$227Average$321FlexibilityNo cancel feeOn-time69%

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