Which airports can I use when flying from Seattle to Hamilton?

Flights from Seattle to Hamilton usually depart from Seattle/Tacoma Intl (SEA) and arrive at Hamilton (YHM).

What cabin classes can I book on flights from Seattle to Hamilton?

Only Economy Class is available on flights from Seattle to Hamilton.

Which airports do connecting flights from Seattle to Hamilton pass through?

Most connecting flights from Seattle to Hamilton pass through Calgary (YYC), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Can I save money by using flexible dates for flights from Seattle to Hamilton?

Yes. Being flexible with your travel dates can save you up to 40% on the Seattle to Hamilton route. Thursday is the cheapest departure day at $269 round-trip on average, while Wednesday is the most expensive at $447, a difference of $178. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Do I need a passport to fly from Seattle to Hamilton?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Seattle to Hamilton changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $385 to $1,630. That means the highest observed fare was about 4x higher than the lowest one.

How are flight prices from Seattle to Hamilton looking right now?

One-way fares from Seattle to Hamilton are currently lower than usual. Average one-way flight prices are about $189, which is 5% below the typical average for this route.

What is the time difference between Seattle and Hamilton?

Hamilton is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What is the cheapest airline to fly from Seattle to Hamilton?

WestJet ($385) offered the cheapest round-trip ticket from Seattle to Hamilton in the last 5 days.

What is the cheapest layover airport when flying from Seattle to Hamilton?

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of $410. Based on KAYAK data over the past 3 months.

When flying from Seattle to Hamilton which airport offers the shortest layover?

Calgary (YYC) had the shortest average connection time for Seattle to Hamilton layovers at 717 minutes over the past 3 months.

$181 CHEAP FLIGHTS from Seattle to Hamilton (SEA - YHM)

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Cheapest round-trip

$385

Typical prices: $268-$447

WestJet

Mon 9/17Sat 10/6

SEA - YHM • 1 stop

Cheapest one-way

$183

Typical prices: $184-$284

WestJet

Mon 9/24

SEA - YHM • 1 stop

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Flight Deals

Cheap Flights from Seattle to Hamilton (SEA-YHM)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Seattle to Hamilton

Thu, Sep 17 - Tue, Oct 6

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$385WestJet

Thu, Oct 8 - Tue, Oct 13

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$401WestJet

Wed, Sep 16 - Tue, Sep 22

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$404WestJet

Thu, Sep 17 - Tue, Sep 22

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$408WestJet

Thu, Sep 17 - Tue, Sep 22

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$409WestJet

Thu, Sep 17 - Tue, Oct 6

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 6:45 pmYHM Hamilton-SEA Seattle/Tacoma Intl

27h 35m1 stop Calgary

$413WestJet

Wed, Sep 16 - Mon, Sep 28

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 6:45 pmYHM Hamilton-SEA Seattle/Tacoma Intl

27h 35m1 stop Calgary

$416WestJet

Thu, Oct 8 - Mon, Oct 12

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 6:45 pmYHM Hamilton-SEA Seattle/Tacoma Intl

27h 35m1 stop Calgary

$417WestJet

Wed, Sep 16 - Tue, Sep 22

10:30 am - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

27h 45m1 stop Calgary

6:05 am - 6:45 pmYHM Hamilton-SEA Seattle/Tacoma Intl

15h 40m3 stops Montreal St Hubert Winnipeg Calgary

$420Multiple Airlines

Wed, Sep 16 - Wed, Sep 23

10:30 am - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

27h 45m1 stop Calgary

7:00 am - 6:45 pmYHM Hamilton-SEA Seattle/Tacoma Intl

14h 45m2 stops Winnipeg Calgary

$421Multiple Airlines

Recent last minute flight deals from Seattle to Hamilton

Sat, Sep 12 - Tue, Sep 22

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$404WestJet

Sat, Sep 12 - Tue, Sep 15

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$409WestJet

Sat, Sep 12 - Mon, Sep 14

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$418WestJet

Sat, Sep 12 - Tue, Sep 15

9:45 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

16h 30m2 stops Vancouver Intl Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$711WestJet

Wed, Sep 9 - Wed, Sep 23

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$726WestJet

Sat, Sep 12 - Tue, Sep 22

9:45 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

16h 30m2 stops Vancouver Intl Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$738WestJet

Sat, Sep 12 - Tue, Sep 15

10:30 am - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

27h 45m1 stop Calgary

6:10 pm - 6:45 pmYHM Hamilton-SEA Seattle/Tacoma Intl

27h 35m1 stop Calgary

$741WestJet

Thu, Sep 10 - Sun, Sep 13

9:45 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

16h 30m2 stops Vancouver Intl Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$749WestJet

Thu, Sep 10 - Sun, Sep 13

9:45 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

16h 30m2 stops Vancouver Intl Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$759WestJet

Sat, Sep 12 - Tue, Sep 15

7:35 pm - 5:15 pmSEA Seattle/Tacoma Intl-YHM Hamilton

18h 40m1 stop Calgary

6:10 pm - 9:40 amYHM Hamilton-SEA Seattle/Tacoma Intl

18h 30m1 stop Calgary

$762WestJet

Booking Insights

Price, demand and travel trends for Seattle to Hamilton flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Seattle to Hamilton with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Seattle to Hamilton?

Round-trip flights from Seattle to Hamilton start at $385. Prices are typical for this route right now, with typical round-trip fares ranging from $268 to $447. The lowest price found in the past 5 days was $385 on WestJet.

Find deals

Cheapest flight	$183

Flight from Seattle to Hamilton

When to book flights from Seattle to Hamilton

Are your dates flexible? Find out the best times to travel from Seattle to Hamilton based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Seattle to Hamilton?
Flights from Seattle to Hamilton usually depart from Seattle/Tacoma Intl (SEA) and arrive at Hamilton (YHM).
What cabin classes can I book on flights from Seattle to Hamilton?
Only Economy Class is available on flights from Seattle to Hamilton.
Which airports do connecting flights from Seattle to Hamilton pass through?
Most connecting flights from Seattle to Hamilton pass through Calgary (YYC), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.
Can I save money by using flexible dates for flights from Seattle to Hamilton?
Yes. Being flexible with your travel dates can save you up to 40% on the Seattle to Hamilton route. Thursday is the cheapest departure day at $269 round-trip on average, while Wednesday is the most expensive at $447, a difference of $178. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
Do I need a passport to fly from Seattle to Hamilton?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Seattle to Hamilton changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $385 to $1,630. That means the highest observed fare was about 4x higher than the lowest one.
How are flight prices from Seattle to Hamilton looking right now?
One-way fares from Seattle to Hamilton are currently lower than usual. Average one-way flight prices are about $189, which is 5% below the typical average for this route.
What is the time difference between Seattle and Hamilton?
Hamilton is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

If your dates can be flexible, aim for a Thursday departure instead of Wednesday. On this route, Thursday flights average $269 - about $178 less than Wednesday (40% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Hamilton Airport.
- Super 8 by Wyndham Mt Hope Hamilton Intl Arpt ON

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SEA - YHM

$181 Find Cheap Flights from Seattle to Hamilton - Compare and Save

Everything you should know

Cheap Flights from Seattle to Hamilton (SEA-YHM)

Recent round-trip flight deals from Seattle to Hamilton

Recent one-way flight deals from Seattle to Hamilton

Recent last minute flight deals from Seattle to Hamilton

Price, demand and travel trends for Seattle to Hamilton flights

How much is a round-trip flight from Seattle to Hamilton?

What is the cheapest airline to fly from Seattle to Hamilton?

What is the cheapest layover airport when flying from Seattle to Hamilton?

When flying from Seattle to Hamilton which airport offers the shortest layover?

Key details for Seattle to Hamilton flights

Cheapest flight

When to book flights from Seattle to Hamilton

Your Seattle to Hamilton flight questions, answered

Your guide to booking Seattle to Hamilton flights

More options for your flight from Seattle to Hamilton

Complete your trip to Hamilton with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Seattle to Hamilton

Find direct flights to and from Seattle and Hamilton

Flights from domestic origins to Hamilton

Flights to other popular destinations