YHM - SEA

C$ 204 Find Cheap Flights from Hamilton to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Hamilton to Seattle departing on 21/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Hamilton to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Hamilton to Seattle, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Hamilton to Seattle (YHM-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Hamilton to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Hamilton to Seattle

Thu, 8 Jan - Thu, 22 Jan
WestJet Logo
6:10 p.m. - 2:20 p.m.YHM-SEA
23h 10m1 stop
WestJet Logo
3:10 p.m. - 1:22 p.m.SEA-YHM
19h 12m1 stop
C$ 348WestJet
Find Deal
Thu, 20 Nov - Sun, 23 Nov
WestJet Logo
6:10 p.m. - 2:20 p.m.YHM-SEA
23h 10m1 stop
WestJet Logo
3:10 p.m. - 5:17 p.m.SEA-YHM
23h 07m1 stop
C$ 499WestJet
Find Deal
Sun, 23 Nov - Sun, 30 Nov
WestJet Logo
6:10 p.m. - 2:20 p.m.YHM-SEA
23h 10m1 stop
WestJet Logo
3:10 p.m. - 5:17 p.m.SEA-YHM
23h 07m1 stop
C$ 507WestJet
Find Deal
Thu, 18 Dec - Tue, 6 Jan
WestJet Logo
6:10 p.m. - 2:20 p.m.YHM-SEA
23h 10m1 stop
WestJet Logo
3:10 p.m. - 5:17 p.m.SEA-YHM
23h 07m1 stop
C$ 544WestJet
Find Deal
Thu, 5 Feb - Mon, 9 Feb
Multiple Airlines Logo
6:10 p.m. - 2:19 p.m.YHM-SEA
23h 09m1 stop
Multiple Airlines Logo
3:10 p.m. - 1:20 a.m.SEA-YHM
7h 10m1 stop
C$ 551Multiple Airlines
Find Deal
Thu, 8 Jan - Thu, 22 Jan
WestJet Logo
6:10 p.m. - 10:23 a.m.YHM-SEA
19h 13m2 stops
WestJet Logo
3:10 p.m. - 1:22 p.m.SEA-YHM
19h 12m1 stop
C$ 562WestJet
Find Deal
Thu, 5 Feb - Mon, 9 Feb
Multiple Airlines Logo
6:10 p.m. - 10:21 a.m.YHM-SEA
19h 11m2 stops
Multiple Airlines Logo
3:10 p.m. - 1:20 a.m.SEA-YHM
7h 10m1 stop
C$ 567Multiple Airlines
Find Deal
Thu, 20 Nov - Tue, 25 Nov
WestJet Logo
6:10 p.m. - 2:20 p.m.YHM-SEA
23h 10m1 stop
WestJet Logo
3:10 p.m. - 5:17 p.m.SEA-YHM
23h 07m1 stop
C$ 569WestJet
Find Deal
Sun, 7 Dec - Wed, 10 Dec
WestJet Logo
6:10 p.m. - 2:20 p.m.YHM-SEA
23h 10m1 stop
WestJet Logo
3:10 p.m. - 5:17 p.m.SEA-YHM
23h 07m1 stop
C$ 580WestJet
Find Deal
Sat, 22 Nov - Sat, 29 Nov
Multiple Airlines Logo
8:15 a.m. - 7:16 p.m.YHM-SEA
14h 01m1 stop
Multiple Airlines Logo
5:50 a.m. - 7:00 p.m.SEA-YHM
10h 10m1 stop
C$ 616Multiple Airlines
Find Deal

Everything you should know

Cheapest round-trip
C$ 348
WestJet
Thu 8/1Thu 22/1
YHM - SEA • 1 stop
Cheapest one-way flights
C$ 204
WestJet
Wed 21/1
YHM - SEA • 1 stop
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Booking Insights

KAYAK's insights & trends for Hamilton to Seattle flights

Get data-powered insights and trends into flights from Hamilton to Seattle to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly direct between Hamilton and Seattle?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Hamilton to Seattle.

There are 2 airlines that fly direc from Hamilton to Seattle. They are Air Canada and WestJet. The cheapest airline for this route is WestJet, with the best round-trip deal found costing C$ 217. On average, the best prices for this route can be found at WestJet.

Good to know

Low seasonAugust
Cheapest flightC$ 204
Best time to beat the crowds (32% less expensive on average)
Most popular time to fly and prices are also 32% lower on average.
Flight from Hamilton to Seattle

When to book flights from Hamilton to Seattle

Are your dates flexible? Find out the best times to travel from Hamilton to Seattle 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.

FAQs for booking flights from Hamilton to Seattle

  • What is the cheapest flight from Hamilton to Seattle?

    In the last 3 days, the lowest price for a flight from Hamilton to Seattle was C$ 204 for a one-way ticket and C$ 348 for a round-trip.

  • Which aircraft models fly most regularly from Hamilton to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Hamilton to Seattle?

    Star Alliance is the only airline alliance operating flights between Hamilton and Seattle.

  • Which is the best airline for flights from Hamilton to Seattle, WestJet or Air Canada?

    The two airlines most popular with KAYAK users for flights from Hamilton to Seattle are WestJet and Air Canada. With an average price for the route of C$ 397 and an overall rating of 7.2, WestJet is the most popular choice. Air Canada is also a great choice for the route, with an average price of C$ 693 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Hamilton to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Hamilton to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Hamilton to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Hamilton is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Hamilton to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Hamilton with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Hamilton to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Hamilton up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Hamilton to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Hamilton to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Hamilton to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
WestJetOverall score based on 3148 reviews
6.2Food
7.9Crew
6.1Entertainment
7.1Comfort
7.4Boarding
Airline reviews

We landed 26 min early. It was awesome! Smooth ride too.

10.0 ExcellentKonstantine, Oct 2025YYZ - NAS
Read more WestJet reviews

We landed 26 min early. It was awesome! Smooth ride too.

There is no snack and nit much that would be considered gluten free in yiur food selections. One of your snacks should be a gluten free cookie or small bar etc. maybe it was me but I didn’t see any free movies just internet connection and YouTube .

I like how spacious the plane was but I did not like the fact that there was no entertainment

No dogs! Can we have no dogs in the cabin? Why was there a yappy little dog behind me? Lucky I had ear plugs. Sorry for others without

In spite of purchasing premium, I felt it was perhaps the most uncomfortable seat I have flown in. The base was either broken or poorly made and had no support. Even placing pillows and blankets on the seat (1D aisle) didn’t help. It made for a long and mostly sleepless six hour flight. Crew also were very loudly talking to each other through the night making it very hard to sleep. It was purchased for the price, so I get the risk, but was not impressed.

Good value, minor delay due to waiting for inbound plane but they gave accurate information about wait time. Able to switch to a seat by my husband thanks to a kind flight attendant

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Arrival at Comox from, London,ON 6 hours later... No bueano

Generally good. However. The flight left 30 mins behind schedule with no reason given.

Flight delayed, missed my pick-up had to Uber, plus missed dinner and medication, so sad!

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

Extremely turbulent landing. Crew was friendly and plane comfortable. Airport and US pre clearance was understaffed

The airplane is way too tight, you can hardly enter into your row to sit.. more like kids seats than adults.

Wifi was great. Kind air crew and comfortable seating. Also liked the entertainment options.

First message when all on board was that we didnt have a pilot, then they found one, then it was something about the bridge something not working, they will either fix or do manually. Flight of course was leaving late with all the cruise guests worrying about making it to their ship in time. Then only some luggage made it off the ship. Around 15 to 20 people waiting. 45 min later arrived except mine. I asked the rep at the luggage conveyor, he asked me my name. Then said it was not picked up with the first batch so they put it in a room. I was going to take public transport but now worried about time so took a taxi that cost me $65 USD

The flight was very smooth and good. Boarding was fast, but the staff was just decently friendly.

Air Canada flight staff are in contact negotiations and they are less than happy and it show. The process of self checking baggage is less than desirable with lack of support staff to help

A sandwich and a drink would have been better thank a snack bar...

I liked the behaviour of the crew members.The flight was good.

I swear airplane seats keep getting smaller and smaller but everything else was great. Smooth sailing and we got in early.

Everything you need to know for your flight from Hamilton to Seattle

Information on your arrival and departure airports

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