HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Niagara Falls

$118+ Cheap flights from Key Largo, FL to Niagara Falls, 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — YYZ
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to Niagara Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Key Largo to Niagara Falls are usually found in December or March, booked 67 days in advance, depart on a Friday or Thursday and return on a Sunday

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 July 31, 2025.

Round-trip from

$279
(Flightnetwork)

One-way from

$118
(Air Canada)

Popular in

July

Cheapest in

December

Average price

$380
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. 9% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 31, 2025.

This Flightnetwork deal was found by Cheapflights users on 7/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/112:20 pmMIA - YYZ
1 stop8h 54mAir Canada
Thu 9/186:15 amYYZ - MIA
1 stop7h 05mAir Canada
Deal found 7/29$276
This Flightnetwork deal was found by Cheapflights users on 7/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:00 amMIA - YYZ
1 stop8h 40mMultiple Airlines
Mon 11/39:40 amYYZ - MIA
Nonstop3h 29mMultiple Airlines
Deal found 7/29$281
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/52:39 pmMIA - YYZ
1 stop7h 50mAmerican Airlines
Wed 9/105:17 pmYYZ - MIA
1 stop5h 38mAmerican Airlines
Deal found 7/29$343

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 July 31, 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 9/11

2:20 pm-11:14 pm

1 stop8h 54m

Toronto Pearson Intl

Thu 9/18

6:15 am-1:20 pm

1 stop7h 05m

$276

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Fri 9/19

11:45 am-9:07 pm

1 stop9h 22m

Toronto Pearson Intl

Sun 9/21

4:00 pm-5:33 pm

1 stop25h 33m

$283

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Fri 9/5

2:39 pm-10:29 pm

1 stop7h 50m

Toronto Pearson Intl

Wed 9/10

5:17 pm-10:55 pm

1 stop5h 38m

$343

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Wed 8/13

9:40 pm-12:59 am

Nonstop3h 19m

$118

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Fri 9/26

12:41 pm-9:07 pm

1 stop8h 26m

$123

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Tue 9/30

11:48 am-11:36 pm

1 stop11h 48m

$170

MiamiToronto

MIA - YYZ

MIAYYZ

Miami

Tue 8/12

5:18 am-2:54 pm

1 stop9h 36m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 July 25, 2025.

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, January is the cheapest month in which you can book a flight from Key Largo to Niagara Falls (average of $243). Flying from Key Largo to Niagara Falls in August is currently the most expensive (average of $348). 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 July 31, 2025.

When flying from Key Largo to Niagara Falls, 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 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 Saturday at noon when fares are most often at their lowest. Monday evenings 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 July 31, 2025.

The most flights from KE9 to NI4 are scheduled on a Monday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 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 July 31, 2025.
See what other customers who have flown with Delta, Air Transat, and United 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.
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Air Transat
7.7
Good
424 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Air Canada
7.1
Good
9,851 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

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.

  • 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 $118 on Air Canada. Other airlines that offer cheap prices include Air Transat from $139 and American Airlines from $143 one-way.

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

    Consider Brussels Airlines (91%), GOL (90%) or American Airlines (70%) 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 $1,891, our data indicates the cheapest price to be $107. The most popular route (Miami - Toronto Pearson Intl), is priced around $289.

  • 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, January is the cheapest month in which you can book a flight from Key Largo to Niagara Falls (average of $243). Flying from Key Largo to Niagara Falls in August is currently the most expensive (average of $348). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key Largo to Niagara Falls

See prices for flight routes from nearby airports that may be better suited for you.
Fort Lauderdale to Pearson Intl flights
Orlando to Pearson Intl flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
Miami to Pearson Intl flights
Tampa to Pearson Intl flights
Orlando to Pierre Elliott Trudeau Intl flights
Miami to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Toronto Island flights
Tampa to Pierre Elliott Trudeau Intl flights
Orlando to Toronto Island flights
Tampa to Toronto Island flights
West Palm Beach to Pearson Intl flights
Miami to Toronto Island flights
West Palm Beach to Pierre Elliott Trudeau Intl flights
Jacksonville to Pearson Intl flights
Fort Myers to Pearson Intl flights
Orlando to Ottawa flights
Sarasota to Pearson Intl flights
Tampa to Ottawa flights
Jacksonville to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Ottawa flights
Fort Myers to Pierre Elliott Trudeau Intl flights
Pensacola to Pierre Elliott Trudeau Intl flights
Miami to Ottawa flights
Daytona Beach to Pearson Intl flights
Pensacola to Pearson Intl flights
West Palm Beach to Ottawa flights
Melbourne to Pearson Intl flights
Orlando to Hamilton flights
Gainesville to Pearson Intl flights
Jacksonville to Toronto Island flights
Fort Lauderdale to Hamilton flights
Jacksonville to Ottawa flights
Sarasota to Pierre Elliott Trudeau Intl flights
West Palm Beach to Toronto Island flights
Orlando to London flights
Melbourne to Pierre Elliott Trudeau Intl flights
Panama City to Pierre Elliott Trudeau Intl flights
Panama City to Pearson Intl flights
Fort Myers to Ottawa flights
Daytona Beach to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Sudbury flights
Pensacola to Ottawa flights
Tallahassee to Pearson Intl flights
Miami to North Bay flights
Tampa to London flights
Jacksonville to London flights
Sarasota to Ottawa flights
Miami to Sudbury flights

Top 7 airlines flying from Key Largo to Niagara Falls

Discover the top 7 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapest$22Average$142FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$74Average$272FlexibilityNo cancel feeOn-time67%
Porter AirlinesCheapest$81Average$243FlexibilityNo cancel feeOn-time52%
WestJetCheapest$96Average$308FlexibilityNo cancel feeOn-time60%
DeltaCheapest$124Average$295FlexibilityNo cancel feeOn-timeN/A
Air TransatCheapest$133Average$338FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$178Average$373FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.