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Cheap flights from Seattle to Hamilton, ON from C$ 253

SEA — YHM
10 Oct — 17 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Hamilton

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Hamilton

Thu 8/107:35 p.m. -
1 stop18h 40m
Mon 12/106:10 p.m. -
1 stop27h 35m
Deal found 9/9C$ 524
Wed 23/97:35 p.m. -
1 stop18h 40m
Tue 6/106:10 p.m. -
1 stop18h 30m
Deal found 9/9C$ 564
Wed 23/97:35 p.m. -
1 stop18h 40m
Sun 27/96:10 p.m. -
1 stop18h 30m
Deal found 9/9C$ 566
Tue 22/97:35 p.m. -
1 stop18h 40m
Fri 25/96:10 p.m. -
1 stop18h 30m
Deal found 8/9C$ 569
Thu 17/97:35 p.m. -
1 stop18h 40m
Tue 6/106:10 p.m. -
1 stop18h 30m
Deal found 6/9C$ 571
Tue 6/107:35 p.m. -
1 stop18h 40m
Fri 9/106:10 p.m. -
1 stop18h 30m
Deal found 8/9C$ 576
Tue 15/97:35 p.m. -
1 stop18h 40m
Fri 18/96:10 p.m. -
1 stop18h 30m
Deal found 6/9C$ 578
Thu 8/107:35 p.m. -
1 stop18h 40m
Sun 11/106:10 p.m. -
1 stop18h 30m
Deal found 6/9C$ 593
Wed 25/112:30 p.m. -
1 stop20h 55m
Tue 1/123:25 p.m. -
1 stop25h 15m
Deal found 7/9C$ 597
Thu 15/1010:30 a.m. -
1 stop27h 45m
Sun 18/106:10 p.m. -
1 stop27h 35m
Deal found 9/9C$ 600

Find flight deals from Seattle to Hamilton

Round-trip from

C$ 524

One-way from

C$ 253

Popular in

July

Cheapest in

January

Average price

C$ 801
WestJet
  • WestJet
  • 8/10-12/10
  • 2 total stops
  • 46h 15m total
  • Seattle to Hamilton
Search Deals
WestJet
  • WestJet
  • 26/9-31/12
  • 1 total stop
  • 18h 40m total
  • Seattle to Hamilton
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 251 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 41 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 Seattle to Hamilton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Sat 19/9

7:35 p.m.-5:15 p.m.

1 stop18h 40m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 257

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Thu 15/10

7:35 p.m.-5:15 p.m.

1 stop18h 40m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 287
Quickest round-trip

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Sun 4/10

10:30 a.m.-10:09 p.m.

2 stops8h 39m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 314

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Wed 25/11

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

1 stop20h 55m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 327

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Tue 13/10

7:35 p.m.-3:05 p.m.

2 stops16h 30m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 332

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Fri 9/10

10:30 a.m.-11:13 p.m.

1 stop9h 43m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 345

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Fri 16/10

5:50 a.m.-6:00 p.m.

1 stop9h 10m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 352

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Thu 1/10

10:30 a.m.-10:34 p.m.

2 stops9h 04m

Hamilton

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 370

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Thu 8/10

7:35 p.m.-5:15 p.m.

1 stop18h 40m

Hamilton

Mon 12/10

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

1 stop27h 35m

C$ 531

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Thu 8/10

7:35 p.m.-5:15 p.m.

1 stop18h 40m

Hamilton

Tue 13/10

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

1 stop18h 30m

C$ 576

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

Showing 1-10 of 17 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Hamilton

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

Related info for your journey

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

    WestJet can get you from Seattle to Hamilton, Ontario in just under 18h 40m. Your travel time can differ by up to . Airlines will cover a distance of 3304 km.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Hamilton 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

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Cheapflights helps you find that perfect flight to Hamilton from Seattle by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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