London to Cairo: a jet lag plan that fits the route.
London (LHR) sits in Europe/London. Cairo (CAI) is east of you, 2 hours ahead. The flight is around 4h 44m gate to gate.
London, United Kingdom to Cairo, Egypt crosses 2 time zones — and you’re going east, the harder direction. Cairo is 2 hours ahead of home, on a flight of about 4 hours.
Your body resists going to sleep earlier far more than going to sleep later. That’s why eastbound trips like this one chew up more days than the same number of zones in the other direction — your circadian clock has to be pulled forward, against its natural drift.
For most travelers, that translates to about 2 days of feeling off. We grade this route as easy. The plan below is built around the things that actually move your body clock — light, sleep timing, caffeine, and (if you want it) a small dose of melatonin — applied at the times when they actually work.
How to fly London → Cairo without losing the first three days.
- 1Three days before — start sleeping a little earlier
Move bedtime 40 minutes earlier each night for the three nights before you fly, and wake the same amount earlier. Get bright light within 30 minutes of waking. Skip evening light — sunglasses if you’re out late.
- 2On the plane — sleep when the destination sleeps
If you arrive in the morning, get four solid hours on board, aligned with night at the destination. Eye mask, no alcohol, water every hour. If you arrive in the evening, do the opposite — stay awake.
- 3Day one — sunlight in the morning, no big nap
Step outside within thirty minutes of waking. A short nap is fine before 14:00 if you’re wrecked, but keep it under thirty minutes. Eat on local meal times — meals are a circadian cue almost as strong as light.
- 4Optional — 0.5 mg melatonin half an hour before bed
Low-dose melatonin (0.5–1 mg) is the dose backed by research; high-dose pills are not better. Use it for the first three to five nights only. Talk to a doctor first if you take medication or are pregnant.
- 5Cut caffeine eight hours before bed
Caffeine has a half-life of about five hours; eight hours before bed clears most of it. If you’re sensitive, give yourself twelve. Strategic morning coffee is fine and helps you stay awake during the destination day.
More about flying London to Cairo
Flight basics: London → Cairo
Flights are 5-6 hours, mostly nonstop via British Airways and EgyptAir. Afternoon London departures arrive Cairo early evening. The short flight keeps fatigue minimal, but heat and altitude add stress.
When to go (and when to brace)
October–March is essential: Cairo warm but tolerable (15–28°C), London mild/cool. Avoid May–September (Cairo heat peaks at 38°C+; jet lag compounds thermal shock).
At London
Depart 2 pm from London. Arrive Cairo 6 pm fresh. Go directly to hotel, shower, rest 1 hour only, then walk the Nile Corniche at sunset for 90 minutes.
After landing in Cairo
Sunset walk along the Nile helps anchor your circadian rhythm. Dinner 8 pm local (late but Cairo eats late). Sleep by 11 pm. The 2-hour gap is forgiving—one intentional evening solves it.
What to actually expect
Cairo's 5-hour flight was almost too short to trigger jet lag. The Nile sunset walk was restorative, dinner aligned with local time, and I slept perfectly that night. Simplest transatlantic route I've done. The 2-hour gap is more forgiving than expected.
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Frequently asked
How many hours is the time difference between London and Cairo?+
Cairo is 2 hours ahead of London. The exact gap can shift by an hour twice a year if either city observes daylight saving time.
How bad is the jet lag from London to Cairo?+
You’re flying east, crossing 2 time zones. Most people need about 2 days to feel normal. The first 48 hours are the worst — that’s when sleep is the most fragmented and the afternoon energy crash is the deepest.
Should I take melatonin?+
For eastbound trips of this size, a low dose (0.5–1 mg) thirty minutes before your destination bedtime can shave a day or two off recovery. Use it for the first three to five nights, not indefinitely. Talk to a clinician first if you take other medication or are pregnant.
When is the best time to take a nap on arrival?+
Before 14:00 local time, no longer than 30 minutes. Naps later than that bleed into the evening and push your bedtime even further back, which is the opposite of what you want.
Does staying hydrated really help?+
Cabin air is 10–20% humidity (drier than the Sahara). Dehydration mimics the symptoms of jet lag — headache, fatigue, brain fog — so a hydrated traveler is just less miserable, even if their underlying clock hasn’t shifted yet. Alcohol multiplies the effect; skip it on the flight.