The cheapest times to fly from YHM to SEA are

  • January 8th to March 4th (except the week of February 12th)
  • March 26th to April 8th
  • August 27th to December 9th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from YHM to SEA is mid October. Prices can be as high as $751 for Sunday flights during late December, or as low as $463 for Tuesday flights around mid October.


When to Fly to Seattle

Flying from Hamilton (YHM) to Seattle, WA (SEA) will usually cost between $501 to $694 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid October with an average ticket price of $496. Due to high demand the most expensive time to fly is late December, with an average price of $710. Planning your trip to low-cost times can easily save you $213 on economy flights and even more on first-class flights. Generally, any price below $604 can be considered a good price for a round-trip YHM to SEA flight.

See below for a graph of average weekly prices for the YHM to SEA route. All prices are for round-trip tickets in USD.

YHM to SEA Flight Prices

Compared to other flights, the YHM to SEA flight is cheaper than the average and costs less than the average flight leaving from Hamilton. The average price per mile (for a direct flight) is $0.18, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to SEA, and Wednesday the cheapest day to fly back into YHM. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $63 (9%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $574. Return trip prices are from the SEA to YHM flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from YHM to SEA can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 4 hour 41 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from YHM to SEA while comparing.

Destination alternative #1: Abbotsford Airport (YXX) in Abbotsford

  • 108 miles (174 km) away from SEA
  • Usually 37.25% less expensive than SEA
  • Nonstop flights available

See YHM to YXX flights

Destination alternative #2: Portland International Airport (PDX) in Portland, OR

  • 129 miles (208 km) away from SEA
  • Usually 20.86% less expensive than SEA
  • 1-layover flights available

See YHM to PDX flights


Flight Hacking YHM to SEA

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from YHM to SEA — but Champion Traveler does!

Hack #1: Las Vegas, NV (YHM > LAS > SEA)

  • Price for both tickets: $562
  • Average savings: $42 (6.95%)

See YHM to flights


Flight Questions Answered

Still have questions about flying from YHM to SEA? We’ve got answers.

Which airlines fly this route?

You can find 4 major airlines flying this route most often: Alaska, Delta, United, WestJet, and potentially more during busy seasons.

How far away is it from Seattle/Tacoma International Airport to John C. Munro Hamilton International Airport?

The distance between the two airports is roughly 2054 miles or 3306 kilometers.

How long does it take to fly from YHM to SEA?

The real-world flight time for a nonstop YHM to SEA flight is about 4 hour 41 minutes.

How many flights go between Hamilton and Seattle, WA?

It depends on the day of the week and the date, but a typical day might have around 66 available flights from YHM to SEA.


Airport Location Info


Departing Airport

Origination codeYHM
Origination airport nameJohn C. Munro Hamilton International Airport

Return Airport

Destination codeSEA
Destination airport nameSeattle/Tacoma International Airport
CitySeattle, WA
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.