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 United Airlines, with prices starting from $99 and $109, respectively.

Weekly flight availability from Seattle to Niagara Falls

The most flights from SEA to NI4 are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

In terms of precipitation, rainfall in Niagara Falls ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Niagara Falls when rainfall is around 2.0 in.

If weather is an important factor for your trip to Niagara Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

What are the cheapest flights from Seattle to Niagara Falls?

While on average a flight from Seattle to Niagara Falls is generally $872, our data shows the cheapest flight currently is $214. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $378 for that flight.

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

Consider Qatar Airways (98%), Alaska Airlines (98%) or United Airlines (96%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Niagara Falls.

What are the most popular airlines that fly from Seattle to Niagara Falls?

Consider Alaska Airlines, WestJet or Air Canada when booking your flight. These represent the most popular airlines when flying from Seattle to Niagara Falls.

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.

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.

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Niagara Falls are usually found in January or February, booked 65 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	December
Cheapest in	January
Average price	$623

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. 16% potential increase in price ($93 potential increase over avg. RT price).

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Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).

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Average for round-trip flights in November 2026

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

Prices

Airlines

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

13,158 reviews

Reviews

1 / 20

10.0

Excellent

Parduman,Nov 2026

SEA - LHR

Super, I would love to fly out again and again with my favourite Alaska Airlines

Alaska Airlines

7.9

Good

13,158 reviews

Alaska Airlines

7.9

Good

13,158 reviews

Reviews

1 / 20

10.0

Excellent

Parduman,Nov 2026

SEA - LHR

Super, I would love to fly out again and again with my favourite Alaska Airlines

Delta

7.8

Good

8,701 reviews

Alaska Airlines

7.9

Good

13,158 reviews

Reviews

1 / 20

10.0

Excellent

Parduman,Nov 2026

SEA - LHR

Super, I would love to fly out again and again with my favourite Alaska Airlines

United Airlines

7.3

Good

10,471 reviews

Alaska Airlines

7.9

Good

13,158 reviews

Reviews

1 / 20

10.0

Excellent

Parduman,Nov 2026

SEA - LHR

Super, I would love to fly out again and again with my favourite Alaska Airlines

WestJet

7.2

Good

3,436 reviews

Alaska Airlines

7.9

Good

13,158 reviews

Reviews

1 / 20

10.0

Excellent

Parduman,Nov 2026

SEA - LHR

Super, I would love to fly out again and again with my favourite Alaska Airlines

Air Canada

7.1

Good

11,880 reviews

Alaska Airlines

7.9

Good

13,158 reviews

Reviews

1 / 20

10.0

Excellent

Parduman,Nov 2026

SEA - LHR

Super, I would love to fly out again and again with my favourite Alaska Airlines

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 United Airlines, with prices starting from $99 and $109, respectively.
What are the most reliable airlines from Seattle to Niagara Falls?
Consider Qatar Airways (98%), Alaska Airlines (98%) or United Airlines (96%) 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 $872, our data shows the cheapest flight currently is $214. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $378 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.

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Top 5 airlines flying from Seattle to Niagara Falls

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$142	Average$490	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$162	Average$445	FlexibilityNo cancel fee	On-time67%
WestJet	Cheapest$240	Average$366	FlexibilityNo cancel fee	On-time60%
Alaska Airlines	Cheapest$245	Average$541	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$277	Average$579	FlexibilityNo cancel fee	On-time69%

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

Find cheap flights from Seattle to Niagara Falls with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Seattle to Niagara Falls

Most accurate provider

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Popular in

Cheapest in

Average price

Cheapflights Insights

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.

Weekly flight availability from Seattle to Niagara Falls

The most flights from SEA to NI4 are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

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.

Related info for your journey

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

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

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

What are the cheapest flights from Seattle to Niagara Falls?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Niagara Falls

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Complete your trip

Complete your trip to Niagara Falls by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Seattle to Niagara Falls by cabin class

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Seattle and Niagara Falls flights

Browse other Seattle and Niagara Falls flight options. Last updated on November 11, 2026.

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