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Cheap flights from Niagara Falls to Seattle from C$ 211

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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Niagara Falls to Seattle/Tacoma Intl are usually found in February or January, booked 70 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap 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 16 September 2025.

Round-trip from

C$ 297

One-way from

C$ 211

Popular in

July

Cheapest in

February

Average price

C$ 511
WestJet
  • WestJet
  • 10/12-27/2
  • 2 total stops
  • 30h 23m total
  • Niagara Falls to Seattle
Search Deals
United Airlines
  • United Airlines
  • 17/10
  • 1 total stop
  • 11h 45m total
  • Niagara Falls to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 122 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 September 2025
Search Deals

Find flight deals from Niagara Falls to Seattle

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 16 September 2025.

Wed 10/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Fri 27/23:10 p.m.SEA - YYZ
1 stop20h 48mWestJet
Deal found 16/9C$ 296
Wed 10/124:45 p.m.YYZ - SEA
Nonstop5h 33mAlaska Airlines
Sat 28/28:00 a.m.SEA - YYZ
Nonstop4h 35mAlaska Airlines
Deal found 16/9C$ 300
Sat 13/124:45 p.m.YYZ - SEA
Nonstop5h 33mMultiple Airlines
Fri 27/23:10 p.m.SEA - YYZ
2 stops11h 48mMultiple Airlines
Deal found 16/9C$ 303
Tue 9/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Fri 27/23:10 p.m.SEA - YYZ
2 stops11h 48mWestJet
Deal found 16/9C$ 304
Fri 3/106:45 a.m.YYZ - SEA
1 stop8h 50mWestJet
Wed 8/108:40 a.m.SEA - YYZ
1 stop12h 42mWestJet
Deal found 16/9C$ 305
Wed 10/127:45 a.m.YYZ - SEA
1 stop9h 35mMultiple Airlines
Tue 24/28:00 a.m.SEA - YYZ
Nonstop4h 35mMultiple Airlines
Deal found 16/9C$ 307
Tue 2/127:45 a.m.YYZ - SEA
1 stop9h 35mMultiple Airlines
Sat 6/127:55 a.m.SEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 16/9C$ 308
Tue 9/127:45 a.m.YYZ - SEA
1 stop9h 35mMultiple Airlines
Tue 24/28:00 a.m.SEA - YYZ
Nonstop4h 35mMultiple Airlines
Deal found 16/9C$ 311
Wed 10/124:45 p.m.YYZ - SEA
Nonstop5h 33mAlaska Airlines
Thu 26/28:00 a.m.SEA - YYZ
Nonstop4h 35mAlaska Airlines
Deal found 16/9C$ 312
Fri 24/101:30 p.m.YYZ - SEA
1 stop8h 51mWestJet
Sun 2/1111:55 a.m.SEA - YYZ
2 stops8h 44mWestJet
Deal found 16/9C$ 314
Tue 7/1012:00 p.m.YYZ - SEA
1 stop10h 31mAir Canada
Mon 20/102:55 p.m.SEA - YYZ
1 stop7h 11mAir Canada
Deal found 15/9C$ 315
Tue 7/104:00 p.m.YYZ - SEA
2 stops9h 31mMultiple Airlines
Wed 8/101:50 p.m.SEA - YYZ
1 stop7h 32mMultiple Airlines
Deal found 14/9C$ 316

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 16 September 2025.
Use the filters below to find and compare flights from Niagara Falls to Seattle that are best for you.

Fly from

Niagara Falls

Fly to

Seattle

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 12/12

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

Seattle/Tacoma Intl

Sun 1/3

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

C$ 323

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 8/12

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

Seattle/Tacoma Intl

Sun 1/3

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

C$ 323

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 8/10

7:00 a.m.-11:31 a.m.

1 stop7h 31m

Seattle/Tacoma Intl

Sat 18/10

1:57 p.m.-11:58 p.m.

1 stop7h 01m

C$ 325

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 3/11

6:40 p.m.-11:11 a.m.

1 stop19h 31m

Seattle/Tacoma Intl

Fri 7/11

8:15 a.m.-3:58 p.m.

Nonstop4h 43m

C$ 333

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 12/10

6:45 a.m.-12:35 p.m.

1 stop8h 50m

Seattle/Tacoma Intl

Mon 20/10

8:40 a.m.-12:31 a.m.

2 stops12h 51m

C$ 333

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 8/10

7:00 a.m.-11:31 a.m.

1 stop7h 31m

Seattle/Tacoma Intl

Sat 11/10

3:28 p.m.-7:00 a.m.

1 stop12h 32m

C$ 334

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 29/10

6:52 a.m.-11:43 a.m.

1 stop7h 51m

Seattle/Tacoma Intl

Wed 5/11

7:00 a.m.-11:59 p.m.

1 stop13h 59m

C$ 334

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 25/10

7:00 a.m.-11:31 a.m.

1 stop7h 31m

Seattle/Tacoma Intl

Sat 1/11

5:05 a.m.-3:02 p.m.

1 stop6h 57m

C$ 334

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 22/10

9:00 p.m.-9:43 a.m.

1 stop15h 43m

Seattle/Tacoma Intl

Tue 28/10

11:59 p.m.-9:58 a.m.

1 stop6h 59m

C$ 334

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 13/12

5:55 p.m.-12:59 a.m.

1 stop10h 04m

Seattle/Tacoma Intl

Sat 21/2

7:00 a.m.-7:38 p.m.

1 stop9h 38m

C$ 337

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 21 results
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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 12 September 2025.

The best time to book flights from Niagara Falls to Seattle is 70 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, January is the cheapest month in which you can book a flight from Niagara Falls to Seattle (average of C$ 262). Flying from Niagara Falls to Seattle in December is currently the most expensive (average of C$ 353). 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 16 September 2025.

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.

What is the cheapest day to fly from Niagara Falls to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Niagara Falls to Seattle. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Niagara Falls to Seattle flight should consider departing on Friday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 16 September 2025.

The most flights from NI4 to SEA are scheduled on a Tuesday (6 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Niagara Falls to Seattle?

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 16 September 2025.
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
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
WestJet
7.2
Good
3,093 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 4 inbound flights from Niagara Falls per day.

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

    Alaska Airlines, United Airlines, and WestJet can get you from Niagara Falls to Seattle in just under 5h 33m. Your travel time can differ by up to 3h 17m. There are 3306 km between Niagara Falls and Seattle. Both multi-stop and direct flights can be found to your destination and back.

  • 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: Alaska Airlines (93%), Hawaiian Airlines (93%), Air Tahiti Nui( 89%).

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

    While on average a flight from Niagara Falls to Seattle is generally C$ 733, our data shows the cheapest flight currently is C$ 251. When looking at the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), you can expect to pay C$ 300 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, January is the cheapest month in which you can book a flight from Niagara Falls to Seattle (average of C$ 262). Flying from Niagara Falls to Seattle in December is currently the most expensive (average of C$ 353). 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
Leavenworth
SeaTac
Tukwila
Tacoma
Bothell
Cashmere
Renton
Olympia
Marysville
Lynnwood

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Alternative routes for Niagara Falls to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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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 16 September 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 183AverageC$ 403FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 322AverageC$ 518FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 343AverageC$ 563FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 368AverageC$ 643FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 377AverageC$ 501FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Hawaiian AirlinesCheapestC$ 411AverageC$ 464FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights

Fly with Cheapflights

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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.

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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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