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Cheap flights from Hamilton, ON to Seattle from C$ 364

YHM — SEA
24 Nov — 1 Dec1
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 24/113:25 p.m. -
1 stop25h 15m
Mon 30/112:30 p.m. -
1 stop20h 55m
Deal found 22/10C$ 671
Thu 17/123:25 p.m. -
1 stop25h 15m
Wed 13/12:30 p.m. -
1 stop20h 55m
Deal found 22/10C$ 692
Thu 26/113:25 p.m. -
1 stop25h 15m
Mon 30/112:30 p.m. -
1 stop20h 55m
Deal found 25/10C$ 693
Thu 26/113:25 p.m. -
1 stop25h 15m
Wed 2/122:30 p.m. -
1 stop20h 55m
Deal found 23/10C$ 710
Thu 3/123:25 p.m. -
1 stop25h 15m
Sat 5/122:20 p.m. -
1 stop21h 05m
Deal found 23/10C$ 713
Tue 17/113:25 p.m. -
1 stop25h 15m
Sat 21/112:20 p.m. -
1 stop21h 05m
Deal found 24/10C$ 721
Thu 19/113:25 p.m. -
1 stop25h 15m
Sun 22/115:48 p.m. -
1 stop20h 38m
Deal found 25/10C$ 737
Thu 12/113:25 p.m. -
1 stop25h 15m
Mon 16/112:30 p.m. -
1 stop20h 55m
Deal found 22/10C$ 889
Sun 29/117:05 a.m. -
1 stop10h 37m
Wed 2/1210:35 a.m. -
2 stops24h 35m
Deal found 24/10C$ 906
Sat 21/116:20 a.m. -
2 stops19h 18m
Sat 28/115:48 p.m. -
1 stop27h 28m
Deal found 22/10C$ 923

Find flight deals from Hamilton to Seattle

Round-trip from

C$ 671

One-way from

C$ 364

Popular in

June

Cheapest in

February

Average price

C$ 630
WestJet
  • WestJet
  • 17/12-13/1
  • 2 total stops
  • 46h 10m total
  • Hamilton to Seattle
Search Deals
WestJet
  • WestJet
  • 26/11-31/12
  • 1 total stop
  • 25h 15m total
  • Hamilton to Seattle
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
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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

Tue 24/11

3:25 p.m.-1:40 p.m.

1 stop25h 15m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 368

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Tue 16/3

4:25 p.m.-2:40 p.m.

1 stop25h 15m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 368

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Tue 17/11

3:25 p.m.-1:40 p.m.

1 stop25h 15m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 392

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Thu 10/12

12:10 p.m.-3:43 p.m.

3 stops30h 33m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 427

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Sun 20/12

3:25 p.m.-1:40 p.m.

1 stop25h 15m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 550

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Sat 5/12

7:05 a.m.-1:01 p.m.

1 stop8h 56m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 574

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Sat 31/10

7:05 a.m.-2:51 p.m.

1 stop10h 46m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 585
Quickest round-trip

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Mon 23/11

7:05 a.m.-12:56 p.m.

1 stop8h 51m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 594

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Fri 6/11

7:05 a.m.-2:44 p.m.

1 stop10h 39m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 612

HamiltonSeattle

YHM Hamilton - SEA Seattle/Tacoma Intl

YHMSEA

Hamilton

Thu 26/11

3:25 p.m.-1:40 p.m.

1 stop25h 15m

Seattle/Tacoma Intl

Mon 30/11

2:30 p.m.-2:25 p.m.

1 stop20h 55m

C$ 693

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/10

Showing 1-10 of 18 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 25h 15m. 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
Tukwila
Mukilteo
Ellensburg
Renton
Lynnwood
Cashmere
Tacoma
Marysville
Federal Way
Kirkland
Leavenworth

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

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Yes! Cheapflights helps users easily find flights from Hamilton to Seattle with no change fees.

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Yes! Start tracking prices for Hamilton to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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