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Cheap flights from Niagara Falls, ON to Seattle from C$ 219

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 25/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
4 Jun — 11 Jun1
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 Thursday or Friday and return on a Thursday

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 5 May 2026.

Thu 16/712:00 p.m.
YYZ
-
SEA
2 stops12h 00m
WestJet
Tue 28/710:30 a.m.
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 2/5C$ 305
Fri 25/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Sat 3/107:35 p.m.
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 3/5C$ 306
Sat 5/92:50 p.m.
YYZ
-
SEA
1 stop9h 10m
WestJet
Mon 14/910:30 a.m.
SEA
-
YYZ
1 stop7h 45m
WestJet
Deal found 1/5C$ 310
Fri 10/73:50 p.m.
YYZ
-
SEA
1 stop8h 10m
WestJet
Sun 19/710:30 a.m.
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 1/5C$ 312
Tue 19/512:00 p.m.
YYZ
-
SEA
1 stop9h 45m
WestJet
Tue 26/510:30 a.m.
SEA
-
YYZ
1 stop7h 45m
WestJet
Deal found 30/4C$ 313
Wed 22/73:50 p.m.
YYZ
-
SEA
1 stop8h 10m
WestJet
Mon 27/710:30 a.m.
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 5/5C$ 314
Wed 22/72:50 p.m.
YYZ
-
SEA
1 stop9h 10m
WestJet
Sun 26/710:30 a.m.
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 5/5C$ 316
Wed 22/72:50 p.m.
YYZ
-
SEA
1 stop9h 10m
WestJet
Sat 1/87:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 5/5C$ 317
Mon 27/712:00 p.m.
YYZ
-
SEA
2 stops9h 45m
WestJet
Sat 1/810:30 a.m.
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 4/5C$ 318
Thu 20/812:00 p.m.
YYZ
-
SEA
2 stops12h 00m
WestJet
Fri 28/87:00 a.m.
SEA
-
YYZ
2 stops11h 10m
WestJet
Deal found 4/5C$ 320
Thu 28/512:00 p.m.
YYZ
-
SEA
2 stops9h 45m
WestJet
Thu 4/610:30 a.m.
SEA
-
YYZ
1 stop7h 45m
WestJet
Deal found 30/4C$ 321
Thu 4/612:00 p.m.
YYZ
-
SEA
2 stops9h 45m
WestJet
Sat 13/610:30 a.m.
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 3/5C$ 322

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 5 May 2026.

Round-trip from

C$ 305

One-way from

C$ 219

Popular in

July

Cheapest in

February

Average price

C$ 472
WestJet
  • WestJet
  • 16/7-28/7
  • 4 total stops
  • 22h 29m total
  • Niagara Falls to Seattle
Search Deals
WestJet
  • WestJet
  • 25/7
  • 2 total stops
  • 14h 20m total
  • Niagara Falls to Seattle
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (C$ 129 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 5 May 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

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 16/5

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

1 stop11h 28m

Seattle/Tacoma Intl

Sun 24/5

9:30 a.m.-10:59 p.m.

1 stop10h 29m

C$ 437

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 4/6

5:45 p.m.-12:10 a.m.

1 stop9h 25m

Seattle/Tacoma Intl

Tue 9/6

11:59 p.m.-11:35 a.m.

1 stop8h 36m

C$ 522

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 23/6

2:29 p.m.-10:34 p.m.

1 stop11h 05m

Seattle/Tacoma Intl

Thu 2/7

5:30 a.m.-5:24 p.m.

1 stop8h 54m

C$ 535

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 17/5

12:29 p.m.-8:43 p.m.

1 stop11h 14m

Seattle/Tacoma Intl

Mon 25/5

11:05 p.m.-1:30 p.m.

1 stop11h 25m

C$ 541

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 20/5

5:45 p.m.-12:12 a.m.

1 stop9h 27m

Seattle/Tacoma Intl

Sun 24/5

11:05 p.m.-1:30 p.m.

1 stop11h 25m

C$ 570

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 19/7

2:24 p.m.-10:33 p.m.

1 stop11h 09m

Seattle/Tacoma Intl

Mon 3/8

9:45 a.m.-11:02 p.m.

1 stop10h 17m

C$ 596

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 18/7

1:30 p.m.-6:45 p.m.

1 stop8h 15m

Seattle/Tacoma Intl

Mon 3/8

7:35 p.m.-6:55 a.m.

1 stop8h 20m

C$ 610
Quickest round-trip

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 24/10

6:45 p.m.-9:04 p.m.

Nonstop5h 19m

Seattle/Tacoma Intl

Sun 1/11

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

C$ 616

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 14/6

1:30 p.m.-6:45 p.m.

1 stop8h 15m

Seattle/Tacoma Intl

Sat 20/6

7:35 p.m.-5:45 a.m.

1 stop7h 10m

C$ 637

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 26/6

3:50 p.m.-9:00 p.m.

1 stop8h 10m

Seattle/Tacoma Intl

Sat 4/7

7:35 p.m.-6:55 a.m.

1 stop8h 20m

C$ 637

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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

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 5 May 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 5 May 2026.

The most flights from NI4 to SEA are scheduled on a Monday (4 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 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 5 May 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
12,329 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Alaska Airlines
7.9
Good
12,329 reviews
Alaska Airlines
7.9
Good
12,329 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Delta
7.9
Good
8,459 reviews
Alaska Airlines
7.9
Good
12,329 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
United Airlines
7.4
Good
9,683 reviews
Alaska Airlines
7.9
Good
12,329 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
WestJet
7.2
Good
3,331 reviews
Alaska Airlines
7.9
Good
12,329 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Air Canada
7.1
Good
10,998 reviews
Alaska Airlines
7.9
Good
12,329 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

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 2 inbound flights from Niagara Falls per day.

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

    Delta can get you from Niagara Falls to Seattle in just under 11h 28m. 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 Alaska Airlines (C$ 167), WestJet (C$ 180), and Air Canada (C$ 210).

  • 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 (73%), Hawaiian Airlines (69%), Qatar Airways( 50%).

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

    While on average a flight from Niagara Falls to Seattle is generally C$ 603, our data shows the cheapest flight currently is C$ 263. When looking at the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), you can expect to pay C$ 320 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.

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
Kent
Tacoma
Bothell
Cashmere
Olympia
Renton
Marysville
Lynnwood
Kirkland
Tukwila

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 5 May 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 265AverageC$ 359FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 267AverageC$ 448FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapestC$ 275AverageC$ 483FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 290AverageC$ 587FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 349AverageC$ 658FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Hawaiian AirlinesCheapestC$ 368AverageC$ 641FlexibilityNo 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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