Seattle to Boston time converter

Boston is 3 hours ahead of Seattle. When it is 9:00 AM in Seattle, it is 12:00 PM in Boston.

Seattle PDT

Saturday, October 17, 2026

Boston EDT

Saturday, October 17, 2026

Seattle
Washington, United States
Sat, Oct 17
PDTUTC-7
Boston
Massachusetts, United States
Sat, Oct 17
EDTUTC-4+3h
Finding your time zone…
Shared working hours (9:00–18:00)

Seattle to Boston conversion table

Every hour of today in Seattle and the matching time in Boston. Light rows are typical working hours (9:00–18:00).

SeattleBoston
12:00 AM3:00 AM
1:00 AM4:00 AM
2:00 AM5:00 AM
3:00 AM6:00 AM
4:00 AM7:00 AM
5:00 AM8:00 AM
6:00 AM9:00 AM
7:00 AM10:00 AM
8:00 AM11:00 AM
9:00 AM12:00 PM
10:00 AM1:00 PM
11:00 AM2:00 PM
12:00 PM3:00 PM
1:00 PM4:00 PM
2:00 PM5:00 PM
3:00 PM6:00 PM
4:00 PM7:00 PM
5:00 PM8:00 PM
6:00 PM9:00 PM
7:00 PM10:00 PM
8:00 PM11:00 PM
9:00 PM12:00 AM+1 day
10:00 PM1:00 AM+1 day
11:00 PM2:00 AM+1 day

Best time to call or meet

Both sides are at work from 9:00 AM – 3:00 PM in Seattle (12:00 PM – 6:00 PM in Boston).

Daylight saving time and the difference

The difference changes during the year because Seattle and Boston switch clocks on different dates:

  • Oct 17, 2026 – Oct 31, 2026: +3h
  • Oct 31, 2026 – Nov 1, 2026: +2h
  • Nov 1, 2026 – Mar 13, 2027: +3h
  • Mar 13, 2027 – Mar 14, 2027: +4h
  • Mar 14, 2027 – Oct 17, 2027: +3h

Distance

Seattle and Boston are 4,000 km (2,485 miles) apart in a straight line.

More conversions

Boston to SeattleSeattle to New YorkSeattle to LondonSeattle to Los AngelesSeattle to ChicagoSeattle to TorontoSeattle to São PauloSeattle to ParisSeattle to BerlinSeattle to MoscowSeattle to DubaiSeattle to New DelhiSeattle to Bangkok
New York to BostonLondon to BostonLos Angeles to BostonChicago to BostonToronto to BostonSão Paulo to BostonParis to BostonBerlin to BostonMoscow to BostonDubai to BostonNew Delhi to BostonBangkok to Boston

Questions and answers

What is the time difference between Seattle and Boston?

Boston is 3 hours ahead of Seattle.

What time is it in Boston when it is 9 AM in Seattle?

When it is 9:00 AM in Seattle, it is 12:00 PM in Boston.

When is the best time to call Boston from Seattle?

Both sides are at work from 9:00 AM – 3:00 PM in Seattle (12:00 PM – 6:00 PM in Boston).

Does the time difference between Seattle and Boston change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.