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Niagara Falls

Cheap flights from Seattle (SEA) to Niagara Falls, Canada

SEA — YYZ
Oct 22 — Oct 291
Thu 10/22
Thu 10/29
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Niagara Falls are usually found in January or February, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Find flight deals from Seattle to Niagara Falls

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

September

Cheapest in

January

Average price

$572
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
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Highest demand for flights based on searches. 19% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 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 Seattle to Niagara Falls

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

When flying from Seattle 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

Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Seattle to Niagara Falls to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,953 reviews

Food

7.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska Airlines
7.9
Good
12,953 reviews
Alaska Airlines
7.9
Good
12,953 reviews

Food

7.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Delta
7.8
Good
8,597 reviews
Alaska Airlines
7.9
Good
12,953 reviews

Food

7.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
United Airlines
7.4
Good
10,222 reviews
Alaska Airlines
7.9
Good
12,953 reviews

Food

7.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
WestJet
7.2
Good
3,446 reviews
Alaska Airlines
7.9
Good
12,953 reviews

Food

7.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Air Canada
7.1
Good
11,663 reviews
Alaska Airlines
7.9
Good
12,953 reviews

Food

7.0

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Related info for your journey

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

    If you book a flight to Niagara Falls from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 3 flights from Seattle/Tacoma Intl to Niagara Falls per day from 5 different airlines.

  • What are the cheapest airlines to fly from Seattle to Niagara Falls one-way?

    $80 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Air Canada and WestJet, with prices starting from $99 and $102, respectively.

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

    Consider Qatar Airways (95%), Alaska Airlines (95%) or Air Canada (89%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Niagara Falls.

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

    While on average a flight from Seattle to Niagara Falls is generally $738, our data shows the cheapest flight currently is $201. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $394 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Seattle to Niagara Falls

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$132Average$393FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$132Average$444FlexibilityNo cancel feeOn-time67%
WestJetCheapest$229Average$362FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$250Average$488FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$579FlexibilityNo cancel feeOn-time69%

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