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Cheap flights from Hamilton, ON to Seattle from C$ 246

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
YHM — SEA
25 Feb — 4 Mar1
1 adult

Cheap flight deals from Hamilton to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Hamilton (YHM) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 February 2025.

Round-trip from

C$ 425

One-way from

C$ 246

Popular in

May

Cheapest in

August

Average price

C$ 378
WestJet
  • WestJet
  • 28/4-3/5
  • 2 total stops
  • 17h 49m total
  • Hamilton to Seattle
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WestJet
  • WestJet
  • 5/5
  • 1 total stop
  • 9h 58m total
  • Hamilton to Seattle
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 30 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Hamilton to Seattle

Cheapest flights from Hamilton to Seattle
Explore the most affordable flight options available from Hamilton to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Mon 28/46:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Sat 3/51:50 p.m.SEA - YHM
1 stop7h 51mWestJet
Deal found 20/2C$ 425

Find flights from Hamilton to Seattle within your budget

Customize your flight search to find flights from Hamilton 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, Cheapflights users made 629,999 searches. Data last updated 20 February 2025.

Fly from

Hamilton

Fly to

Seattle

Route

Depart

Return

Price

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Mon 28/4

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

1 stop9h 58m

Seattle/Tacoma Intl

Sat 3/5

1:50 p.m.-12:41 a.m.

1 stop7h 51m

C$ 425

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Mon 5/5

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

1 stop9h 58m

C$ 246

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Wed 25/6

8:20 a.m.-2:53 p.m.

1 stop9h 33m

C$ 537

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Best time to book a flight from Hamilton to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Hamilton with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Hamilton to Seattle

Get recent, data-driven insights about flights from Hamilton to Seattle including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Hamilton, Ontario to Seattle?

Currently, January is the cheapest month in which you can book a flight from Hamilton, Ontario to Seattle (average of C$ 262). Flying from Hamilton, Ontario to Seattle in April is currently the most expensive (average of C$ 382). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YHM to SEA?

Find hourly flight availability from Hamilton to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 February 2025.

It’s typically best to fly out from Hamilton, Ontario to Seattle at noon. Doing so could potentially save you 20% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 20 February 2025.
WestJet
7.2
Good
2,801 reviews
Check prices

Entertainment

6.1

Overall

7.2

Food

6.2

Crew

7.9

Boarding

7.4

Comfort

7.1

Reviews

1 / 20

6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

WestJet
7.2
Good
2,801 reviews
WestJet
7.2
Good
2,801 reviews
Check prices

Entertainment

6.1

Overall

7.2

Food

6.2

Crew

7.9

Boarding

7.4

Comfort

7.1

Reviews

1 / 20

6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Related info for your journey

Find useful and relevant information for your journey from Hamilton to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Hamilton, Ontario to Seattle round-trip?

    Cheapflights users have booked flights from Hamilton, Ontario to Seattle round-trip from C$ 425. WestJet is currently priced 26% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Hamilton to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Hamilton, Ontario to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Hamilton, Ontario to Seattle (average of C$ 262). Flying from Hamilton, Ontario to Seattle in April is currently the most expensive (average of C$ 382). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Hamilton?

Book flights to Hamilton if you plan to visit one of these locations
SeaTac
Tukwila
Marysville
Bothell
Leavenworth
Tacoma
Olympia
Lynnwood

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Hamilton to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Hamilton to Seattle

Discover the top airline that operate flights from Hamilton to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 20 February 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 328AverageC$ 568FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Hamilton to Seattle?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Hamilton to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Hamilton to Seattle?

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

Can Cheapflights find flights from Hamilton to Seattle with no change fees?

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

Can Cheapflights notify me if prices for flights from Hamilton to Seattle become cheaper?

Yes! Start tracking prices for Hamilton to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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