Istanbul to Custoias time converter

Custoias is 2 hours behind Istanbul. When it is 9:00 AM in Istanbul, it is 7:00 AM in Custoias.

Istanbul TRT

Tuesday, October 20, 2026

Custoias WEST

Tuesday, October 20, 2026

Istanbul
Turkey
Tue, Oct 20
TRTUTC+3
Custoias
Portugal
Tue, Oct 20
WESTUTC+1-2h
Finding your time zone…
Shared working hours (9:00–18:00)

Istanbul to Custoias conversion table

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

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

Best time to call or meet

Both sides are at work from 11:00 AM – 6:00 PM in Istanbul (9:00 AM – 4:00 PM in Custoias).

Daylight saving time and the difference

The difference changes during the year because Istanbul and Custoias switch clocks on different dates:

  • Oct 20, 2026 – Oct 25, 2026: -2h
  • Oct 25, 2026 – Mar 28, 2027: -3h
  • Mar 28, 2027 – Oct 20, 2027: -2h

Distance

Istanbul and Custoias are 3,019 km (1,876 miles) apart in a straight line.

More conversions

Custoias to IstanbulIstanbul to New YorkIstanbul to LondonIstanbul to Los AngelesIstanbul to ChicagoIstanbul to TorontoIstanbul to São PauloIstanbul to ParisIstanbul to BerlinIstanbul to MoscowIstanbul to DubaiIstanbul to New DelhiIstanbul to Bangkok
New York to CustoiasLondon to CustoiasLos Angeles to CustoiasChicago to CustoiasToronto to CustoiasSão Paulo to CustoiasParis to CustoiasBerlin to CustoiasMoscow to CustoiasDubai to CustoiasNew Delhi to CustoiasBangkok to Custoias

Questions and answers

What is the time difference between Istanbul and Custoias?

Custoias is 2 hours behind Istanbul.

What time is it in Custoias when it is 9 AM in Istanbul?

When it is 9:00 AM in Istanbul, it is 7:00 AM in Custoias.

When is the best time to call Custoias from Istanbul?

Both sides are at work from 11:00 AM – 6:00 PM in Istanbul (9:00 AM – 4:00 PM in Custoias).

Does the time difference between Istanbul and Custoias change?

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