Paris → Seoul jet lag
Seoul is 7 hours ahead of Paris until October 24, 2026 and from March 28, 2027; it is 8 hours ahead from October 25, 2026 to March 27, 2027. The gap varies with summer and winter time. Eastward: your body clock has to move earlier. This is usually the harder direction.
Your flight, your plan
The calculator is pre-filled with a typical flight on this route. Change the date, time or duration to match yours.
Eastward: your body clock has to move earlier. This is usually the harder direction. Without a strategy, allow about 8 days for your body clock to fully adjust: on average it shifts by about 1 hour per day eastward and 1.5 hours per day westward (CDC).
Your in-flight plan · Paris → Seoul
All times are shown in destination time.
Boarding: switch to Seoul time
It is 21:30 in Seoul. Set your watch and live on destination time from now on.
Sleep from 23:00 to 06:00 (7 h)
It is night in Seoul. Eye mask, earplugs, no screens. Skip the meal if it falls in this window.
Wake up at 06:00
Open the window shade or switch on the light, have breakfast and move a little before landing.
Landing at 10:40 local time
Hold on until the evening: get outside in daylight, no nap longer than 20 minutes, go to bed around 10–11 pm.
First days at destination
- Light: with a shift this large, avoid bright light early in the morning for the first two days (before about 10 am) and seek it late in the morning and around midday. In the evening, keep lights and screens dim.
- Naps: if you need one during the day at destination, keep it to 20 or 30 minutes so you can still sleep at night.
- Caffeine: no coffee or tea in the 6 hours before you plan to sleep.
- Hydration: drink water regularly and go easy on alcohol, which disrupts sleep and makes symptoms worse.
That is the general rule. The EOLE app adapts it to you.
The app builds your plan from your chronotype and your itinerary, then guides you through the flight: when to seek or avoid light, guided breathing and movement, hydration reminders, and an arrival plan for your first days. It works offline, in airplane mode. Free to download on iOS and Android.
General guidance based on chronobiology, not medical advice. If you have a health condition, are pregnant or take medication, ask a health professional.
How to handle jet lag on this route
- Light: with a shift this large, avoid bright light early in the morning for the first two days (before about 10 am) and seek it late in the morning and around midday. In the evening, keep lights and screens dim.
- Naps: if you need one during the day at destination, keep it to 20 or 30 minutes so you can still sleep at night.
- Caffeine: no coffee or tea in the 6 hours before you plan to sleep.
- Hydration: drink water regularly and go easy on alcohol, which disrupts sleep and makes symptoms worse.
Frequently asked questions
What is the time difference between Paris and Seoul?
Seoul is 7 hours ahead of Paris until October 24, 2026 and from March 28, 2027; it is 8 hours ahead from October 25, 2026 to March 27, 2027. The gap varies with summer and winter time.
How long is the flight from Paris to Seoul?
About 13 h 10 non-stop. This is indicative and varies with the airline, the aircraft and the season.
Should I sleep on the Paris to Seoul flight?
Yes, for a 13:30 departure: sleep during the Seoul night, about 7 h on board. The calculator above adapts this to your exact schedule.
How long does jet lag last after flying Paris to Seoul?
Without a strategy, the body clock adapts by about 1 hour per day after an eastward flight and 1.5 hours per day after a westward one (CDC Yellow Book 2026). For this route, allow about 8 days for a full adjustment. Symptoms are usually strongest in the first days and vary a lot between people.