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Niagara Falls

Cheap flights from Denver (DEN) to Niagara Falls, Canada

DEN — YYZ
Oct 29 — Nov 51
Thu 10/29
Thu 11/5
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Niagara Falls are usually found in March or January, booked 68 days in advance, depart on a Friday or Thursday and return on a Thursday

Find flight deals from Denver to Niagara Falls

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

February

Cheapest in

March

Average price

$642
Provider with most accurate pricing for Denver Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Toronto (YTO) flights.
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High demand for flights, 4% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Cheapflights Insights

Everything you need to know about your flight from Denver to Niagara Falls

What is the cheapest time of day to fly from DEN to NI4?

When flying from Denver 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.

Reviews of airlines servicing Niagara Falls

Get a feel of what it's like to fly with United Airlines and Air Canada from Denver to Niagara Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,251 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
10,251 reviews
United Airlines
7.4
Good
10,251 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Air Canada
7.1
Good
11,703 reviews
United Airlines
7.4
Good
10,251 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

  • What airport do you fly from for flights from Denver to Niagara Falls?

    If you book a flight to Niagara Falls from Denver, you will be flying from Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 18.5 mi from the center of Denver. There are 9 flights from Denver Intl to Niagara Falls per day from 2 different airlines.

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

    Consider Air Canada Rouge (100%), Air Canada (74%) or United Airlines (69%) when booking your flight. These represent the most reliable airlines when flying from Denver to Niagara Falls.

  • What are the cheapest flights from Denver to Niagara Falls?

    While on average a flight from Denver to Niagara Falls is generally $2,344, our data shows the cheapest flight currently is $164. When looking at the most popular route, (Denver Intl - Toronto Pearson Intl), you can expect to pay $350 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver 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.

See more FAQs

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Alternative routes for Denver to Niagara Falls

Denver to Pearson Intl flights
Denver to Ottawa flights
Denver to Hamilton flights
Denver to London flights
Colorado Springs to Ottawa flights
Aspen to Ottawa flights

Top 2 airlines flying from Denver to Niagara Falls

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$222Average$596FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$279Average$661FlexibilityNo cancel feeOn-time69%

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