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Jet lag plan

Colombo → Delhi

Colombo and Delhi share the same time zone.

About 2,439 km due north · approximately 3.8-hour non-stop flight · a long-haul flight.

On arrival

  • Colombo and Delhi are in the same time zone — no jet lag adjustment needed.

About the Colombo → Delhi route

The route from Colombo, Sri Lanka to Delhi, India covers roughly 2,439 kilometres in a due north direction. At standard jet cruise speed plus a one-hour allowance for taxi, climb, and descent, a non-stop flight takes about 3.8 hours. Both cities sit in the northern hemisphere, so the seasonal direction of daylight (longer days in June, shorter in December) matches between origin and destination.

Colombo sits within ten degrees of the equator, so day length is nearly constant year-round (about 12 hours). Sunset and sunrise stay close to 06:00 and 18:00 regardless of season. Delhi is in the subtropics. Day length varies by roughly two hours between summer and winter; light remains a reliable circadian cue most of the year.

Business-hours overlap

Standard 09:00–18:00 working hours at both ends of this route overlap by approximately 9 hours. In Colombo that window runs 09:00 to 18:00; in Delhi it is 09:00 to 18:00. This is the realistic window for live meetings, customer calls, or pair work without forcing either end out of normal hours.

Daylight saving on this route

Neither city observes daylight saving time, so the hour offset on this route is fixed year-round. This makes recurring schedules and calendar invites with collaborators on the other end safer than for DST-observing pairs.

Frequently asked questions

How long is the flight from Colombo to Delhi?

The great-circle distance from Colombo to Delhi is about 2,439 kilometres. A typical non-stop flight takes around 3.8 hours at standard cruise speed; routes with connections add two to four hours.

What is the time difference between Colombo and Delhi?

Colombo and Delhi share the same time zone, so there is no clock offset on this route.

Is jet lag worse flying east or west on this route?

No circadian shift is required between these two cities.

Should I take melatonin for the Colombo → Delhi trip?

For a shift of 0 hours, melatonin offers little benefit beyond what consistent light exposure already provides. The Cochrane review on jet-lag melatonin shows the strongest effects on shifts of five hours or more.

Do I need a pre-trip schedule shift for Colombo → Delhi?

For a shift under two hours, pre-trip adjustment is usually not worth the effort.

What chronotype handles this route best?

Chronotype does not affect adjustment on a same-time-zone route.

Sources

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