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Cheap flights from Niagara Falls, ON to Seattle from C$ 204

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 30/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Niagara Falls to Seattle/Tacoma Intl are usually found in February or January, booked 86 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Niagara Falls to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Niagara Falls to Seattle
Explore the most affordable flight options available from Niagara Falls to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2026.

Fri 1/512:30 a.m.
YYZ
-
SEA
2 stops12h 35m
Air Canada
Sat 9/57:20 p.m.
SEA
-
YYZ
2 stops9h 50m
Air Canada
Deal found 21/3C$ 331
Sat 2/54:55 p.m.
YYZ
-
SEA
Nonstop5h 28m
Multiple Airlines
Sat 9/58:00 a.m.
SEA
-
YYZ
Nonstop4h 50m
Multiple Airlines
Deal found 21/3C$ 333
Thu 23/47:30 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Wed 29/48:00 a.m.
SEA
-
YYZ
Nonstop4h 54m
Air Canada
Deal found 19/3C$ 343
Fri 1/54:55 p.m.
YYZ
-
SEA
Nonstop5h 28m
Multiple Airlines
Sat 9/58:00 a.m.
SEA
-
YYZ
Nonstop4h 50m
Multiple Airlines
Deal found 18/3C$ 346
Wed 15/47:30 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Tue 21/410:20 a.m.
SEA
-
YYZ
1 stop10h 13m
Air Canada
Deal found 18/3C$ 347
Tue 14/47:30 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Tue 21/43:45 p.m.
SEA
-
YYZ
2 stops10h 44m
Air Canada
Deal found 19/3C$ 348
Sat 18/44:00 p.m.
YYZ
-
SEA
2 stops9h 53m
Air Canada
Tue 12/52:55 p.m.
SEA
-
YYZ
1 stop7h 43m
Air Canada
Deal found 17/3C$ 350
Wed 20/57:45 a.m.
YYZ
-
SEA
2 stops9h 35m
Air Canada
Wed 3/62:55 p.m.
SEA
-
YYZ
1 stop7h 43m
Air Canada
Deal found 18/3C$ 357
Wed 15/47:30 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Mon 20/48:00 p.m.
SEA
-
YYZ
1 stop14h 05m
Air Canada
Deal found 19/3C$ 358
Fri 17/410:00 a.m.
YYZ
-
SEA
2 stops12h 20m
Air Canada
Tue 12/55:40 a.m.
SEA
-
YYZ
2 stops10h 47m
Air Canada
Deal found 17/3C$ 359

Find flight deals from Niagara Falls to Seattle

Keep the following information in mind while searching for Niagara Falls to Seattle flight deals. Data was last updated 22 March 2026.

Round-trip from

C$ 331

One-way from

C$ 204

Popular in

July

Cheapest in

February

Average price

C$ 439
Air Canada
  • Air Canada
  • 1/5-9/5
  • 4 total stops
  • 22h 25m total
  • Niagara Falls to Seattle
Search Deals
Air Canada
  • Air Canada
  • 30/4
  • Nonstop
  • 5h 23m total
  • Niagara Falls to Seattle
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 123 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Niagara Falls to Seattle 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 629,999 searches. Data last updated 22 March 2026.
Use the filters below to find and compare flights from Niagara Falls to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 1/5

7:22 p.m.-11:54 p.m.

1 stop7h 32m

Seattle/Tacoma Intl

Sat 9/5

5:30 a.m.-3:19 p.m.

1 stop6h 49m

C$ 381

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 9/5

2:20 p.m.-10:48 p.m.

1 stop11h 28m

Seattle/Tacoma Intl

Sun 17/5

5:30 a.m.-3:14 p.m.

1 stop6h 44m

C$ 381

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 27/4

7:22 p.m.-11:54 p.m.

1 stop7h 32m

Seattle/Tacoma Intl

Fri 1/5

11:59 p.m.-11:32 a.m.

1 stop8h 33m

C$ 381

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 1/5

7:22 p.m.-11:54 p.m.

1 stop7h 32m

Seattle/Tacoma Intl

Sun 10/5

5:30 a.m.-4:33 p.m.

1 stop8h 03m

C$ 383

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 29/4

9:46 a.m.-2:17 p.m.

1 stop7h 31m

Seattle/Tacoma Intl

Mon 4/5

11:15 p.m.-12:19 p.m.

1 stop10h 04m

C$ 418

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 25/4

3:53 p.m.-11:12 p.m.

1 stop10h 19m

Seattle/Tacoma Intl

Tue 28/4

5:00 a.m.-10:23 p.m.

2 stops14h 23m

C$ 468

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 22/5

4:18 p.m.-8:00 a.m.

1 stop18h 42m

Seattle/Tacoma Intl

Sat 30/5

5:00 p.m.-9:54 a.m.

1 stop13h 54m

C$ 479

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 14/4

10:45 a.m.-9:06 p.m.

2 stops13h 21m

Seattle/Tacoma Intl

Tue 21/4

8:55 a.m.-11:59 p.m.

2 stops12h 04m

C$ 538

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 8/9

7:00 a.m.-11:17 a.m.

1 stop7h 17m

Seattle/Tacoma Intl

Mon 14/9

11:56 p.m.-2:24 p.m.

1 stop11h 28m

C$ 562
Cheapest one-way

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 25/4

1:30 p.m.-10:56 p.m.

1 stop12h 26m

C$ 228

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/3

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Niagara Falls to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Niagara Falls 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 Niagara Falls to Seattle

How far ahead should I book a flight from Niagara Falls to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Niagara Falls to Seattle. Price data was last updated on 13 March 2026.

The best time to book flights from Niagara Falls to Seattle is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Niagara Falls to Seattle?

Currently, December is the cheapest month in which you can book a flight from Niagara Falls to Seattle (average of C$ 180). Flying from Niagara Falls to Seattle in July is currently the most expensive (average of C$ 324). 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 NI4 to SEA?

Find hourly flight availability from Niagara Falls to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Niagara Falls to Seattle as you normally would.

Weekly flight availability from Niagara Falls to Seattle

Explore weekly flight availability from Niagara Falls to Seattle. 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 22 March 2026.

The most flights from NI4 to SEA are scheduled on a Friday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 22 March 2026.
See what other customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Niagara Falls to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,093 reviews
Check prices

Overall

7.9

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
7.9
Good
12,093 reviews
Alaska Airlines
7.9
Good
12,093 reviews
Check prices

Overall

7.9

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,314 reviews
Alaska Airlines
7.9
Good
12,093 reviews
Check prices

Overall

7.9

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,455 reviews
Alaska Airlines
7.9
Good
12,093 reviews
Check prices

Overall

7.9

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
WestJet
7.2
Good
3,300 reviews
Alaska Airlines
7.9
Good
12,093 reviews
Check prices

Overall

7.9

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Air Canada
7.1
Good
10,830 reviews
Alaska Airlines
7.9
Good
12,093 reviews
Check prices

Overall

7.9

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

Find useful and relevant information for your journey from Niagara Falls to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly into when you book flights from Niagara Falls to Seattle. 6 airlines have flights to Seattle/Tacoma Intl from Niagara Falls on a regular basis. Booking flights from Niagara Falls to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 3 inbound flights from Niagara Falls per day.

  • How long is the flight from Niagara Falls to Seattle?

    Air Canada can get you from Niagara Falls to Seattle in just under 12h 35m. Your travel time can differ by up to . There are 3306 km between Niagara Falls and Seattle.

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

    The cheapest airlines for a one-way flight from Niagara Falls to Seattle are Delta (C$ 152), Alaska Airlines (C$ 168), and WestJet (C$ 181).

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

    Before booking your flight to Seattle from Niagara Falls, check out the most reliable airlines to get you to your destination on time: Air Tahiti Nui (80%), Qatar Airways (79%), Alaska Airlines( 75%).

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

    While on average a flight from Niagara Falls to Seattle is generally C$ 435, our data shows the cheapest flight currently is C$ 254. When looking at the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), you can expect to pay C$ 353 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Niagara Falls to Seattle 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 Niagara Falls to Seattle?

    Currently, December is the cheapest month in which you can book a flight from Niagara Falls to Seattle (average of C$ 180). Flying from Niagara Falls to Seattle in July is currently the most expensive (average of C$ 324). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Leavenworth
Mukilteo
Tacoma
Kent
Bothell
Cashmere
Tukwila
Olympia
Renton
Marysville
Lynnwood
Kirkland

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Niagara Falls to Seattle

Discover the top 6 airlines that operate flights from Niagara Falls to Seattle. 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 629,999 searches. Data last updated 22 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 127AverageC$ 339FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 271AverageC$ 452FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapestC$ 277AverageC$ 486FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 312AverageC$ 590FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 341AverageC$ 622FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Hawaiian AirlinesCheapestC$ 408AverageC$ 460FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Niagara Falls to Seattle?

When you search for this flight from Niagara Falls to Seattle, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Niagara Falls to Seattle?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Niagara Falls to Seattle.

Can Cheapflights find flights from Niagara Falls to Seattle with no change fees?

Certainly. Search results for flights to Seattle from Niagara Falls shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Niagara Falls to Seattle become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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