Flight Time
0 km
Distance
0 km
0 mi
Flight Time
9h 20m – 10h 35m
🇺🇸 Seattle → 🇯🇵 Tokyo
SEA to NRT — Complete travel planning guide
Time Difference
05:10
Seattle
+16h
difference
21:10
Tokyo
Jet Lag Severity
MildModerateSevere
severe
Severity
0h
Zones crossed
0d
To adjust
Adjustment Timeline
Day 1
07:00 – 20:00
Day 2
05:00 – 20:00
Day 3
05:00 – 20:00
Day 4
05:00 – 20:00
Day 5
05:00 – 20:00
Day 6
05:00 – 20:00
Day 7
05:00 – 20:00
Day 8
05:00 – 20:00
Day 9
05:00 – 20:00
Day 10
05:00 – 20:00
Day 11
05:00 – 22:00
Day 12
05:00 – 23:00
Flying the other way?Tokyo → Seattle
Flying from Seattle to Tokyo
The flight from Seattle (SEA) to Tokyo (NRT) covers approximately 7,656 kilometers (4,757 miles) based on the great-circle distance between both airports. This is the shortest theoretical path over Earth's surface, though actual flight paths may be slightly longer due to air traffic routing, weather avoidance, and airspace restrictions.
The estimated non-stop flight time is 9h 20m to 10h 35m, assuming a modern jet cruising at approximately 850 km/h. This gate-to-gate estimate includes time for taxi, takeoff, climb, cruise, descent, and landing. Actual duration varies based on wind conditions — particularly the jet stream — aircraft type, and airport congestion at both ends.
Tokyo is 16 hour(s) ahead of Seattle. Travelers crossing 16 time zone(s) eastward can expect severe jet lag, with full circadian adjustment typically taking about 12 day(s).
Since you're traveling eastward, your body clock needs to advance — meaning you'll need to go to bed earlier and wake up earlier than feels natural. Strategic morning light exposure at your destination is the most effective way to accelerate this adjustment.