City comparison · time difference and converter
Reykjavik is 3 hours behind Cairo right now. Cairo sits in Egypt on Cairo; Reykjavik sits in Iceland on Reykjavik. They are roughly 5,271 km apart (3,275 mi), a flight of about 7h 12m. Cairo's metro holds around 21.7 million people; Reykjavik's around 0.2 million.
Slot 1
12:00 / 09:00
Cairo / Reykjavik
Both inside business hoursSlot 2
13:00 / 10:00
Cairo / Reykjavik
Both inside business hoursSlot 3
14:00 / 11:00
Cairo / Reykjavik
Both inside business hoursEach row is one hour in Cairo. Green rows are inside business hours in both cities; amber means only one side is at their desk; grey rows fall outside business hours in both.
Icelandic National Day
Reykjavik, Iceland · Þjóðhátíðardagurinn
Wed, Jun 17
Great-circle distance
5,271 km
(3,275 mi)
Approximate flight
7h 12m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
3h
Roughly 1 day to adjust per timezone crossed
The heatmap gives you the shape of the day. If you need to convert one specific hour — say a customer call or a release window — open the converter with both cities already loaded.
Open in converter →The difference between Cairo and Reykjavik is not really a number, it's a daily rhythm. Reykjavik is 3 hours behind Cairo on the clock today, but the lived version is that Cairo is ahead in the calendar, so by the time Reykjavik comes online, half of Cairo's day is already gone. That gap, more than the raw offset, is what teams have to design around.
In Cairo, the working day picks up earliest in the financial districts — Cairo's downtown core wakes early and breaks for lunch at the usual hour. The mood in Reykjavik is its own story: Reykjavik settles into the evening at the usual hour, with the local commuter pattern setting the pace. If you are scheduling between the two, the heatmap above marks the rows where both patterns line up.
Daylight saving is the other thing to keep an eye on. Egypt either observes DST or holds a fixed offset year-round; Iceland follows the EU calendar (last Sunday of March and October). When the two changes are weeks apart, the offset between Cairo and Reykjavik is one hour off the usual for that stretch — a cliff that catches recurring calendar invites unless your calendar app rebases them automatically. Pin the meeting to a city, not an offset, and the tool handles the rest.
For travellers, the 7h 12m flight is the short version of the story. The longer one is jet lag: roughly one day of adjustment per timezone crossed, which means a trip across the 3-hour gap costs about 3 groggy days on each side. Pilots and cabin crew swear by morning sunlight and an early walk; whatever your routine, the wall-clock numbers above are the source of truth for your first morning in the new city.