Flight time & jet lag: Calgary to Seattle

Calgary to Seattle: Route overview

This short-haul route from Calgary (YYC) to Seattle (SEA) covers 727 km in approximately 1h 28m to 1h 57m, crossing 1 time zone westbound. With only a 1-hour time difference, most travelers adjust within a day, though the short-haul journey may still cause travel fatigue. Both cities sit at similar temperate latitudes, meaning daylight patterns will feel familiar upon arrival — a helpful factor for circadian adjustment.

What makes the Calgary–Seattle route different

With only 1 hour of time difference, this route sits at the threshold where jet lag is barely noticeable for most travelers. The bigger factor is likely the 1h 28m to 1h 57m flight duration itself and any associated sleep deprivation.

Arrival strategy for Seattle

Arriving in Seattle after a 1-hour westward shift gives you a slightly longer day. Your body clock will be 1 hours ahead of local time, so you may feel sleepy earlier than locals. Compensate by seeking bright afternoon and evening light in Seattle, which helps delay your body clock. Try to stay awake until at least 21:00 local time on your first evening.

Circadian rhythm analysis: Calgary → Seattle

When you arrive in Seattle, your circadian rhythm is still running on Calgary time. At 09:00 Seattle time, your body reads 10:00 — a reasonable waking hour internally, so morning performance should be manageable. The main westbound challenge is that by 22:00 local, your body clock reads 23:00 — past your natural bedtime. You will likely feel premature sleepiness in the late afternoon or early evening. Your circadian system adjusts at roughly 1 to 1.5 hours per day, so expect 1 day for full alignment.

Your body clock in Seattle (day 1)

How your body clock maps to local time upon arrival, before any adjustment.

Pre-departure preparation

With minimal time zone change, no pre-departure sleep adjustment is necessary for this Calgary to Seattle route. Focus instead on arriving well-rested: maintain your normal sleep schedule in the days before travel, stay hydrated, and avoid alcohol on the flight.

Your first 72 hours in Seattle

Day 1: Arrive in Seattle and follow local time immediately. Eat meals at normal local hours and get outside in daylight. Day 2: You should feel fully adjusted. Resume normal activities. Day 3: No residual effects expected.

Recovery timeline

Full circadian adjustment for the Calgary → Seattle route typically takes 1 day, based on the body's natural adaptation rate of ~1 to 1.5 hours per day for westbound travel. During this period, expect gradually improving sleep quality, with the most noticeable symptoms (fatigue, difficulty concentrating, appetite changes) during the first 1 days. By day 1, most travelers report feeling fully synchronized with Seattle's schedule.

Route Planner

Adjust departure date for DST-accurate results.

Business hours: Calgary vs Seattle

Seasonal and climate factors

Short-haul flight times on this short-haul route are less affected by seasonal wind patterns, though winter weather can cause delays at both Calgary and Seattle airports. Seattle at 47°N experiences moderate seasonal daylight variation. Summer offers longer evenings useful for westward adjustment, while winter's earlier sunsets support eastward adjustment schedules.

How the Calgary–Seattle flight time is estimated

The 1h 28m to 1h 57m estimate for Calgary to Seattle is derived from the 727-km great-circle distance. As a short-haul route, a larger proportion of flight time is spent climbing and descending rather than at optimal cruise altitude, resulting in a lower effective speed of 650–750 km/h. An additional 30–50 minutes accounts for taxi, takeoff, climb, descent, approach, and taxi at both YYC and SEA. Actual routing through controlled airspace may add 3–8% distance beyond the great-circle path due to air traffic corridors and restricted zones along the way.

Wind patterns and flight duration

On this short 727-km route, wind effects are relatively minor compared to the fixed overhead of taxi, takeoff, and landing. The main variable in flight time is airport congestion and weather at YYC and SEA.

Practical travel context

This short-haul route connects Calgary (Canada) with Seattle (United States).

Frequently asked questions: Calgary to Seattle

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