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Cheap flights from Hamilton, ON to Seattle from C$ 267

YHM — SEA
7 Oct — 14 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Hamilton to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Hamilton to Seattle

Tue 15/96:10 p.m. -
1 stop18h 30m
Thu 17/97:35 p.m. -
1 stop18h 40m
Deal found 3/9C$ 475
Fri 11/96:10 p.m. -
1 stop18h 30m
Tue 15/97:35 p.m. -
1 stop18h 40m
Deal found 4/9C$ 476
Fri 11/96:10 p.m. -
1 stop18h 30m
Thu 17/97:35 p.m. -
1 stop18h 40m
Deal found 4/9C$ 477
Mon 14/96:10 p.m. -
1 stop27h 35m
Wed 16/97:35 p.m. -
1 stop18h 40m
Deal found 4/9C$ 479
Fri 18/96:10 p.m. -
1 stop18h 30m
Thu 24/910:30 a.m. -
1 stop27h 45m
Deal found 3/9C$ 480
Fri 11/96:10 p.m. -
1 stop18h 30m
Mon 21/97:35 p.m. -
1 stop18h 40m
Deal found 2/9C$ 493
Fri 2/106:10 p.m. -
1 stop18h 30m
Tue 6/107:35 p.m. -
1 stop18h 40m
Deal found 3/9C$ 497
Thu 1/106:10 p.m. -
1 stop27h 35m
Sat 3/107:35 p.m. -
1 stop18h 40m
Deal found 2/9C$ 498
Wed 7/106:10 p.m. -
1 stop18h 30m
Wed 21/107:35 p.m. -
1 stop18h 40m
Deal found 2/9C$ 499

Find flight deals from Hamilton to Seattle

Round-trip from

C$ 475

One-way from

C$ 267

Popular in

June

Cheapest in

February

Average price

C$ 562
WestJet
  • WestJet
  • 16/9-23/9
  • 2 total stops
  • 37h 10m total
  • Hamilton to Seattle
Search Deals
WestJet
  • WestJet
  • 15/9-31/12
  • 1 total stop
  • 18h 30m total
  • Hamilton to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Hamilton to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Wed 16/9

6:10 p.m.-9:40 a.m.

1 stop18h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 271

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Thu 15/10

6:10 p.m.-9:40 a.m.

1 stop18h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 281

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Tue 13/10

6:10 p.m.-6:45 p.m.

1 stop27h 35m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 282

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Sun 4/10

6:10 p.m.-9:40 a.m.

1 stop18h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 285

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Thu 10/9

6:10 p.m.-9:40 a.m.

1 stop18h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 297

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Tue 13/10

6:05 a.m.-6:45 p.m.

3 stops15h 40m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 325
Quickest round-trip

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Fri 2/10

7:00 a.m.-6:45 p.m.

2 stops14h 45m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 338

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Thu 15/10

6:05 a.m.-6:45 p.m.

2 stops15h 40m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 371

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Thu 22/10

6:05 a.m.-6:45 p.m.

3 stops15h 40m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 410

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Wed 18/11

6:05 a.m.-6:22 p.m.

3 stops15h 17m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 412

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Hamilton to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Hamilton with our price prediction graph.
Estimated round-trip price

Related info for your journey

  • How long is the flight from Hamilton, Ontario to Seattle?

    WestJet can get you from Hamilton, Ontario to Seattle in just under 18h 30m. Your travel time can differ by up to . Airlines will cover a distance of 3304 km.

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

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

  • How can I find direct flights from Hamilton to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Hamilton 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
Kent
Mukilteo
Leavenworth
Tacoma
Renton
Cashmere
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
Kirkland

Browse thousands of different options on Cheapflights for your next trip

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