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Niagara Falls

$114+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — YYZ
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 67 days in advance, depart on a Thursday or Friday and return on a Sunday

Cheap 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 February 4, 2026.

This Flightnetwork deal was found by Cheapflights users on 2/3. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:05 pm
MIA
-
YYZ
Nonstop3h 21m
Multiple Airlines
Thu 3/59:40 am
YYZ
-
MIA
Nonstop3h 29m
Multiple Airlines
Deal found 2/3$268
This Mytrip deal was found by Cheapflights users on 2/3. 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.
Tue 3/37:05 am
MIA
-
YYZ
2 stops16h 15m
Multiple Airlines
Tue 3/103:40 pm
YYZ
-
MIA
2 stops20h 36m
Multiple Airlines
Deal found 2/3$279
This Mytrip deal was found by Cheapflights users on 2/3. 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 3/1211:38 am
MIA
-
YYZ
1 stop9h 04m
Multiple Airlines
Fri 3/203:40 pm
YYZ
-
MIA
2 stops27h 36m
Multiple Airlines
Deal found 2/3$306
This Mytrip deal was found by Cheapflights users on 2/2. 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 2/267:05 am
MIA
-
YYZ
2 stops16h 15m
Multiple Airlines
Mon 3/93:40 pm
YYZ
-
MIA
2 stops20h 36m
Multiple Airlines
Deal found 2/2$307

Find 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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$268
(Flightnetwork)

One-way from

$114
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$324
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. 3% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 4, 2026.
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

Wed 4/1

2:10 pm-5:30 pm

Nonstop3h 20m

Toronto Pearson Intl

Wed 4/8

10:05 am-5:08 pm

1 stop7h 03m

$325

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Fri 4/3

2:10 pm-5:30 pm

Nonstop3h 20m

Toronto Pearson Intl

Mon 4/6

9:40 am-1:09 pm

Nonstop3h 29m

$325

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Wed 3/4

11:34 am-10:54 pm

1 stop11h 20m

Toronto Pearson Intl

Sat 3/7

10:15 am-6:54 pm

1 stop8h 39m

$329

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Tue 3/24

3:31 pm-10:58 pm

1 stop7h 27m

Toronto Pearson Intl

Sun 3/29

6:10 pm-12:52 am

1 stop6h 42m

$330

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Fri 3/20

6:06 am-10:40 pm

1 stop16h 34m

Toronto Pearson Intl

Mon 3/23

9:40 am-1:09 pm

Nonstop3h 29m

$333

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Tue 3/10

12:01 pm-5:00 pm

1 stop4h 59m

Toronto Pearson Intl

Tue 3/17

3:59 pm-9:18 pm

1 stop5h 19m

$335

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Sat 2/28

6:00 am-8:11 pm

2 stops14h 11m

Toronto Pearson Intl

Thu 3/5

9:40 am-1:09 pm

Nonstop3h 29m

$345

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Fri 6/19

7:00 am-12:16 pm

1 stop5h 16m

Toronto Pearson Intl

Tue 6/23

5:50 pm-6:07 am

1 stop12h 17m

$352

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Thu 4/2

2:10 pm-5:30 pm

Nonstop3h 20m

Toronto Pearson Intl

Mon 4/6

9:40 am-1:09 pm

Nonstop3h 29m

$354

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Mon 3/16

7:04 pm-2:20 pm

2 stops19h 16m

Toronto Pearson Intl

Mon 3/23

9:40 am-1:09 pm

Nonstop3h 29m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

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 January 30, 2026.

Booking 67 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, March is the cheapest month in which you can book a flight from Key Largo to Niagara Falls (average of $73). Flying from Key Largo to Niagara Falls in August is currently the most expensive (average of $108). 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 February 4, 2026.

A simple way to save on the total cost of your ticket is to fly from Key Largo to Niagara Falls at noon. If you’re flexible enough to do this you can expect to save up to 10% 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 January 31, 2026.

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 at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to Niagara Falls

Explore weekly flight availability from Key Largo to Niagara Falls. 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 February 4, 2026.

The most flights from KE9 to NI4 are scheduled on a Monday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (7 on average).

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 February 4, 2026.
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
7.9
Good
412 reviews

Crew

8.6

Food

7.5

Comfort

7.9

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews

Crew

8.6

Food

7.5

Comfort

7.9

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Delta
7.9
Good
8,139 reviews
Porter Airlines
7.9
Good
412 reviews

Crew

8.6

Food

7.5

Comfort

7.9

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
American Airlines
7.2
Good
11,218 reviews
Porter Airlines
7.9
Good
412 reviews

Crew

8.6

Food

7.5

Comfort

7.9

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,685 reviews
Porter Airlines
7.9
Good
412 reviews

Crew

8.6

Food

7.5

Comfort

7.9

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Flair Airlines
6.0
Okay
263 reviews
Porter Airlines
7.9
Good
412 reviews

Crew

8.6

Food

7.5

Comfort

7.9

Entertainment

6.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

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 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 cheapest airlines to fly from Key Largo to Niagara Falls one-way?

    One-way options have recently been found by users for as low as $30 on Flair Airlines. Other airlines that offer cheap prices include WestJet from $80 and Porter Airlines from $87 one-way.

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

    Consider Envoy Air (88%), GOL (84%) or American Airlines (75%) 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 $474, our data indicates the cheapest price to be $101. The most popular route (Miami - Toronto Pearson Intl), is priced around $268.

  • 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, March is the cheapest month in which you can book a flight from Key Largo to Niagara Falls (average of $73). Flying from Key Largo to Niagara Falls in August is currently the most expensive (average of $108). 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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapest$30Average$146FlexibilityNo cancel feeOn-timeN/A
Porter AirlinesCheapest$82Average$227FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$84Average$301FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$86Average$315FlexibilityNo cancel feeOn-time67%
WestJetCheapest$97Average$305FlexibilityNo cancel feeOn-time60%
DeltaCheapest$127Average$346FlexibilityNo cancel feeOn-timeN/A
Air TransatCheapest$132Average$193FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$243Average$408FlexibilityNo cancel feeOn-time71%

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