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Cheap flights from Seattle to Hamilton, ON from C$ 357

SEA — YHM
24 Nov — 1 Dec1
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

Wed 18/112:30 p.m. -
1 stop20h 55m
Thu 26/113:25 p.m. -
1 stop25h 15m
Deal found 23/10C$ 802
Sat 28/112:20 p.m. -
1 stop21h 05m
Sat 5/127:05 a.m. -
1 stop8h 56m
Deal found 23/10C$ 913
Sat 5/122:20 p.m. -
1 stop21h 05m
Sun 13/123:25 p.m. -
1 stop25h 15m
Deal found 24/10C$ 917
Sat 21/112:20 p.m. -
1 stop21h 05m
Tue 1/123:25 p.m. -
1 stop25h 15m
Deal found 24/10C$ 935
Mon 16/112:30 p.m. -
1 stop20h 55m
Thu 19/113:25 p.m. -
1 stop25h 15m
Deal found 22/10C$ 938
Wed 18/112:30 p.m. -
1 stop20h 55m
Fri 20/117:05 a.m. -
1 stop8h 51m
Deal found 24/10C$ 972
Sat 21/112:20 p.m. -
1 stop21h 05m
Sat 28/116:05 a.m. -
2 stops11h 37m
Deal found 24/10C$ 975
Wed 18/112:30 p.m. -
1 stop20h 55m
Wed 25/117:05 a.m. -
1 stop8h 51m
Deal found 21/10C$ 997
Sat 21/112:20 p.m. -
1 stop21h 05m
Sun 29/117:05 a.m. -
1 stop10h 37m
Deal found 23/10C$ 1,000
Fri 20/115:48 p.m. -
2 stops25h 17m
Fri 27/117:05 a.m. -
1 stop27h 02m
Deal found 21/10C$ 1,024

Find flight deals from Seattle to Hamilton

Round-trip from

C$ 802

One-way from

C$ 357

Popular in

July

Cheapest in

January

Average price

C$ 828
WestJet
  • WestJet
  • 18/11-26/11
  • 2 total stops
  • 46h 10m total
  • Seattle to Hamilton
Search Deals
WestJet
  • WestJet
  • 23/11-31/12
  • 1 total stop
  • 20h 55m total
  • Seattle to Hamilton
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 243 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 41 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 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

Mon 23/11

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$ 357

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Mon 30/11

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$ 389

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Sat 5/12

2:20 p.m.-2:25 p.m.

1 stop21h 05m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 417

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Sat 21/11

2:20 p.m.-2:25 p.m.

1 stop21h 05m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 426

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Thu 3/12

9:34 p.m.-12:05 a.m.

1 stop23h 31m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 529

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Tue 24/11

5:48 p.m.-5:26 p.m.

1 stop20h 38m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 566

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Sat 9/1

8:15 p.m.-2:25 p.m.

2 stops15h 10m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 574

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Wed 4/11

3:51 p.m.-7:53 p.m.

1 stop25h 02m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 581
Quickest round-trip

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Sun 10/1

11:26 a.m.-11:52 p.m.

1 stop9h 26m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 604

SeattleHamilton

SEA Seattle/Tacoma Intl - YHM Hamilton

SEAYHM

Seattle/Tacoma Intl

Fri 6/11

11:26 a.m.-12:08 a.m.

1 stop9h 42m

Hamilton

Wed 31/12

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

Nonstop0h 00m

C$ 616

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/10

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 20h 55m. 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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Yes! Cheapflights helps users easily find flights from Seattle to Hamilton with no change fees.

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