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Cheap flights from Hamilton, Ontario to Seattle from C$ 187

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Hamilton, Ontario to Seattle departing on 28/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Hamilton, Ontario to Seattle

Cheap round-trip flights

WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
2:05 p.m. - 12:40 a.m.SEA-YHM
7h 35m1 stop
C$ 274WestJet
Find Deal
Tue, 23 Sep - Tue, 30 Sep
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
2:05 p.m. - 12:40 a.m.SEA-YHM
7h 35m1 stop
C$ 275WestJet
Find Deal
Tue, 23 Sep - Tue, 30 Sep
WestJet Logo
6:00 a.m. - 12:58 p.m.YHM-SEA
9h 58m1 stop
WestJet Logo
2:05 p.m. - 12:41 a.m.SEA-YHM
7h 36m1 stop
C$ 307WestJet
Find Deal
Fri, 22 Aug - Tue, 26 Aug
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
2:05 p.m. - 12:40 a.m.SEA-YHM
7h 35m1 stop
C$ 336WestJet
Find Deal
Tue, 7 Oct - Tue, 14 Oct
WestJet Logo
6:00 a.m. - 12:58 p.m.YHM-SEA
9h 58m1 stop
WestJet Logo
7:05 a.m. - 12:40 a.m.SEA-YHM
14h 35m1 stop
C$ 344WestJet
Find Deal
Sun, 31 Aug - Tue, 2 Sep
WestJet Logo
6:00 a.m. - 12:58 p.m.YHM-SEA
9h 58m1 stop
WestJet Logo
7:05 a.m. - 12:41 a.m.SEA-YHM
14h 36m1 stop
C$ 347WestJet
Find Deal
Fri, 22 Aug - Sat, 30 Aug
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
1:50 p.m. - 12:40 a.m.SEA-YHM
7h 50m1 stop
C$ 356WestJet
Find Deal
Tue, 16 Sep - Wed, 17 Sep
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
1:50 p.m. - 12:40 a.m.SEA-YHM
7h 50m1 stop
C$ 363WestJet
Find Deal
Tue, 7 Oct - Wed, 15 Oct
Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
Logo
7:15 p.m. - 12:40 a.m.SEA-YHM
26h 25m2 stops
C$ 422
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
Logo
5:30 a.m. - 12:40 a.m.SEA-YHM
16h 10m3 stops
C$ 464
Find Deal
Tue, 23 Sep - Tue, 30 Sep

WestJet flights from Hamilton, Ontario to Seattle

Our best WestJet deals on Hamilton, Ontario to Seattle flight tickets
WestJet
23 Sep
YHM6:00 a.m.Hamilton
9h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
30 Sep
SEA2:05 p.m.Seattle/Tacoma Intl
7h 35m
1 stop
YHM12:40 a.m.Hamilton
C$ 274
Find similar
WestJet
23 Sep
YHM6:00 a.m.Hamilton
9h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
30 Sep
SEA2:05 p.m.Seattle/Tacoma Intl
7h 35m
1 stop
YHM12:40 a.m.Hamilton
C$ 275
Find similar
WestJet
22 Aug
YHM6:00 a.m.Hamilton
9h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl
26 Aug
SEA2:05 p.m.Seattle/Tacoma Intl
7h 36m
1 stop
YHM12:41 a.m.Hamilton
C$ 307
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Hamilton, Ontario 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, momondo users made 96,600 searches. Data last updated 11 August 2025.
Use the filters below to find and compare flights from Hamilton, Ontario to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 23/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 30/9

2:05 p.m.-12:40 a.m.

1 stop7h 35m

C$ 274

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 23/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 30/9

2:05 p.m.-12:40 a.m.

1 stop7h 35m

C$ 275

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Fri 22/8

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Tue 26/8

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 307

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 7/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 14/10

2:05 p.m.-12:40 a.m.

1 stop7h 35m

C$ 336

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Sun 31/8

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Tue 2/9

7:05 a.m.-12:40 a.m.

1 stop14h 35m

C$ 344

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Fri 22/8

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Sat 30/8

7:05 a.m.-12:41 a.m.

1 stop14h 36m

C$ 347

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 16/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Wed 17/9

1:50 p.m.-12:40 a.m.

1 stop7h 50m

C$ 356

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 7/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Wed 15/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

C$ 363

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 23/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 30/9

7:15 p.m.-12:40 a.m.

2 stops26h 25m

C$ 422

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 23/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 30/9

5:30 a.m.-12:40 a.m.

3 stops16h 10m

C$ 464

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Hamilton, Ontario to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Seattle?

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 560. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around C$ 732. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Hamilton, Ontario to Seattle during this time can be as low as C$ 476. Flights in the morning are often more expensive with an average ticket price of C$ 823.

When to book flights from Hamilton, Ontario to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Hamilton, Ontario to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Hamilton, Ontario to Seattle (YHM to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Hamilton, Ontario to Seattle

Best price found

C$ 187

Fastest flight time

9h 45m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Hamilton, Ontario in the past 72 hours is C$ 187. The best round-trip flight deal from Hamilton, Ontario to Seattle found on momondo in the last 72 hours is C$ 274.
The fastest flight from Hamilton, Ontario to Seattle takes 9h 45m
There are no direct flights from Hamilton, Ontario to Seattle. Popular non-direct route for this connection is Hamilton Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • How far is Hamilton to Seattle/Tacoma Intl by plane?

    Seattle/Tacoma Intl is 3306.3 km away from Hamilton. Typically, this will take 9h 58m by plane in normal conditions.

  • When did momondo last update prices for flights from Hamilton Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Hamilton Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Hamilton Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Hamilton Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Hamilton Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Hamilton, Ontario to Seattle?

Best airlines flying from Hamilton, Ontario to Seattle

Compare and see reviews for airlines that fly from Hamilton, Ontario to Seattle with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 256Free CancellationRating
7.2
3,007 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 387Free CancellationRating
7.1
9,915 reviews
Search Air Canada flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
Marysville
Tacoma
SeaTac
Kirkland
Redmond
Olympia
Ocean Shores
Shoreline
Ellensburg
Tukwila
Gig Harbor
Renton
Mukilteo
Cle Elum
Poulsbo
Puyallup
Kent
Centralia

Why use momondo?

Why should I use momondo to find a flight deal from Hamilton to Seattle?

Finding the right flight to Seattle from Hamilton is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Hamilton to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Hamilton on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Hamilton to Seattle?

momondo helps you find the best flight between Hamilton and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Hamilton to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Hamilton to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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