LA → Paris
LAX to Paris Jet Lag: How Long It Lasts and How to Beat It
Paris is nine hours ahead of Los Angeles. Untreated, the adjustment runs about seven days. You land around noon Paris time with your body reading 3am, which is the worst possible combination of arrival hour and body clock position. Keep bright light off you until roughly 2pm Paris on day one, then go get it.
Try Flightmode — Save 50%Why nine hours is the tipping point
At eight hours, a strong arrival day can leave you functional by dinner. At nine, one good day barely registers. You need pre-shift progress plus a precise first two days, or you are looking at a full week before Paris time feels normal.
A noon landing with nowhere to check in sends most people into bright outdoor queues or sunny terrace lunches. Both feel like the right thing to do and both set you back. Indoor plans until mid-afternoon, then a long walk, is the difference between day-three recovery and day-six recovery.
How It Works
- Begin shifting east from LA. Starting two days out, you'll move bedtime earlier, from midnight to 11 p.m., with morning light when you wake. Paris is nine hours ahead, and this gets your body moving before the flight.
- Use LA afternoon light to your advantage. Seek bright light from 10 a.m. to 5 p.m. before you fly. It tells your body daytime is ending sooner, which makes Paris mornings less of a shock.
- Turn the afternoon departure into sleep. Leaving at 2:30 p.m. and arriving at 10:25 a.m., you'll take Flightmode Sleep around 5 p.m. and sleep through the bulk of the crossing. Have lunch before boarding so you're not hungry when you should be sleeping.
- Anchor to Paris from landing day. Get outside from 4 p.m. to 10 p.m. on arrival day and take Flightmode Sleep around 1 a.m. By the second morning you're on a Paris schedule after a 9-hour jump.
- Flightmode Sleep and Wake support the shift. Sleep reinforces bedtime on LA and Paris time, and Wake handles the afternoon slump when your body is still on Pacific hours.
Your LA → Paris jet lag plan
UA990 · 9-hour eastbound shift
Times shown in departure airport time.
Beat the LA → Paris shift
Your Jet Lag Plan, in a Gummy
On a nine hour shift the light windows move fast and the wrong call costs you a day. The Travel Planner tracks the crossover against your real flight and your actual pre-shift progress.
- Sleep gummy + Wake gummy in every kit
- AI planner timed to LA → Paris
- Melatonin-free, no morning grogginess
- 30-day First Flight guarantee
What transatlantic travelers say
"No jet lag flying solo. Flying over and flying back I had absolutely no jet lag. Everyone else on the plane was feeling the effects — I was perfectly fine."
"No more 3am wakeups. Usually I wake at odd hours for a week after a big time change. With Flightmode, I slept through the night faster."
"I was full of energy and started my trip immediately. Do not waste your first day in a new time zone dealing with jet lag."
Frequently asked questions
How long does jet lag last flying from LA to Paris?
Around seven days untreated, three to four with a pre-shift.
Is a stopover in New York better for jet lag?
Slightly, if the layover is long enough for daylight exposure. For most people the nonstop is worth more than the marginal gain.
Should I nap when I land in Paris?
Twenty minutes before 1pm. Nothing longer. On a nine hour shift a long arrival nap costs you the first night and the next day.
Why do I feel fine on arrival then terrible on day two?
Travel adrenaline carries the first evening. Day two and three are when the shift actually registers.
Do I need to pre-adjust for a five day trip?
On this route especially. Without a pre-shift you will be adjusting for the entire trip.