Find Cheapest Airlines Flying from Calgary to Seattle

Choose from 1 carriers that fly from Calgary to Seattle, including Alaska Airlines, Enjoy the cheapest tickets on this route with WestJet.
Airlines are determined based on actual purchased flight tickets from Calgary to Seattle according to previous 12 months data from Trip.com.

Explore the cheapest flights from Calgary to Seattle in the next three months. Based on Trip.com's data from the latest 7 days, one-way direct flights start at AU$ 143, and round-trip direct tickets start at AU$ 237.

Displayed flight fares from Calgary to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Calgary to Seattle Flight Details

The distance between Calgary and Seattle is approximately 725.05km. It takes around 1 hour 56 minutes on average to fly from Calgary to Seattle. Based on Trip.com's data travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight priceAU$ 143
Cheapest return ticket priceAU$ 219
Off-season for travelOctober
Peak season for travelJuly
Flight distance725.05km
Average flight time1 hour 56 minutes
Popular airlineAlaska Airlines
Flight statistics for the Calgary–Seattle route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from Calgary to Seattle

What is the cheapest month for one-way flights from Calgary to Seattle?

Average price of one-way flights from Calgary to Seattle purchased by Trip.com users by month over the past 12 months.

According to Trip.com's data, the cheapest month for flights from Calgary to Seattle is Feb, with an average price of AU$ 200. Conversely, the most expensive month is typically Jan, with an average price of up to AU$ 346.

AU$ 346
AU$ 273
AU$ 200
AU$ 127
    Cheapest
  • AU$ 346
    Jan
  • AU$ 200
    Feb
  • AU$ 208
    Mar
  • AU$ 216
    Apr
  • AU$ 254
    May
  • AU$ 265
    Jun
  • AU$ 247
    Jul
  • AU$ 274
    Aug
  • AU$ 230
    Sep
  • AU$ 237
    Oct
  • AU$ 203
    Nov
  • AU$ 233
    Dec

What is the cheapest month for round-trip flights from Calgary to Seattle?

Average price of round-trip flights from Calgary to Seattle purchased by Trip.com users by month over the past 12 months.

According to Trip.com's data, the cheapest month for flights from Calgary to Seattle is Feb, with an average price of AU$ 250. Conversely, the most expensive month is typically Sep, with an average price of up to AU$ 555.

AU$ 555
AU$ 403
AU$ 250
AU$ 98
    Cheapest
  • AU$ 315
    Jan
  • AU$ 250
    Feb
  • AU$ 273
    Mar
  • AU$ 447
    Apr
  • AU$ 316
    May
  • AU$ 321
    Jun
  • AU$ 353
    Jul
  • AU$ 387
    Aug
  • AU$ 555
    Sep
  • AU$ 291
    Oct
  • AU$ 319
    Nov
  • AU$ 265
    Dec

What's the cheapest day to fly from Calgary to Seattle?

Data is based on the average flight price for each day of the week from Calgary to Seattle on Trip.com over the past 12 months.

Based on Trip.com data from the past 12 months, the cheapest day to fly from Calgary to Seattle is Mon, with average prices lower than on other days. Avoid Thu, as prices are usually highest then.

AU$ 271
AU$ 258
AU$ 245
AU$ 231
  • AU$ 244
    Mon
  • AU$ 252
    Tue
  • AU$ 264
    Wed
  • AU$ 271
    Thu
  • AU$ 261
    Fri
  • AU$ 268
    Sat
  • AU$ 259
    Sun

Flight FAQs

  • Which airlines offer the cheapest flights from Calgary (YYC) to Seattle (SEA)?

    Based on Trip.com data, WestJet offers one-way fares as low as AU$ 143 on Cheapest nonstop routes (e.g. YYC to SEA on Fri, Feb 20), while WestJet offers Cheapest nonstop round-trips from AU$ 219 departing on Fri, Feb 6 and returning on Fri, Feb 13.
  • At the moment, you can catch a direct flight from Calgary to Seattle with the following airlines, including: Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 1 hour 56 minutes to fly from Calgary (YYC) to Seattle (SEA).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Calgary to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 12 flight per week flying from Calgary to Seattle. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/T/W/T/F/S -- AS2308 (19:04)
  • To find best deals on flights from Calgary to Seattle, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Fri, Feb 20, with one-way flights priced at just AU$ 143.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is WestJet.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Calgary to Seattle is October, when demand for travel is lower.
  • After crunching the numbers on our January flight calendar, it's currently cheapest to fly from Calgary to Seattle on January 21, 2026 with WestJet, with prices starting at AU$ 134.
  • You can land at any one of the following hubs in Seattle, with Calgary International Airport to Seattle–Tacoma International Airport (YYC-SEA) is by far the most common option on this route: King County (Boeing Field) International Airport (BFI) Kenmore Air - Lake Union (LKE) Seattle–Tacoma International Airport (SEA).
  • The time difference between Seattle and Calgary is 1h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.