🇺🇸 Philadelphia ↔ 🇺🇸 Seattle

Philadelphia is usually 3 hours ahead of Seattle. Both observe daylight saving time, so the difference shifts by an hour for a few weeks around the spring and autumn changeovers.

Sunrise 5:34 AMSunset 8:34 PM(local)

Sunrise 5:13 AMSunset 9:12 PM(local)

Philadelphia: daylight saving timeNow UTC-4 EDT. Next change: November 1, 2026 — clocks go back 1 hour.
Seattle: daylight saving timeNow UTC-7 PDT. Next change: November 1, 2026 — clocks go back 1 hour.
PhiladelphiaUTC-4EDT
SeattleUTC-7PDT

🇺🇸 Philadelphia

Dialing code+1
Population1,573,916
Coordinates39.95°N, 75.16°W
Elevation12 m

🇺🇸 Seattle

Dialing code+1
Population780,995
Coordinates47.61°N, 122.33°W
Elevation56 m

Best time for a call: 12:00–18:00 in PhiladelphiaAdd to calendar

Working hours assumed 9:00–18:00.

Frequently asked questions

What is the time difference between Philadelphia and Seattle?
Philadelphia is 3 hours ahead of Seattle. Use the side-by-side clocks and the day/night strips above to convert any hour between them.
When is the best time to call between Philadelphia and Seattle?
The best window to call is 12:00–18:00 Philadelphia time, when working hours overlap in both cities. Pick an hour on the strips to add it to your calendar.
Why does the time difference between Philadelphia and Seattle change?
Because at least one of Philadelphia and Seattle observes daylight saving time, the difference shifts by an hour when one city changes its clocks and the other has not yet (or does not).