LA → London
LAX to London Jet Lag: How Long It Lasts and How to Beat It
London is eight hours ahead of Los Angeles, a shift that takes about six and a half days untreated. Flights leave in the afternoon and land mid-morning, so you arrive at 11am London time when your body reads 3am. On day one, London morning light pushes your clock later rather than earlier. Stay out of it until early afternoon, then take as much daylight as the weather gives you.
Try Flightmode — Save 50%Why West Coast to London is a different problem than East Coast to London
Boarding at 5 p.m. Pacific means you are fully alert through dinner service. The airline schedules that meal exactly when you need to be winding down. Eating at the airport and treating the flight as a single sleep block works better than trying to sync with cabin service.
You also carry three extra hours of shift compared to New York. That moves your recovery from a manageable four-day window to something closer to six. Pre-adjusting even two nights before departure closes enough of the gap to make the first London morning survivable.
How It Works
- Shift earlier from LA before the overnight. Two days before you fly, you'll pull bedtime from midnight toward 11 p.m. and get bright light when you wake. LA to London is an 8-hour eastbound jump, and this pre-shift takes a real bite out of it.
- Catch afternoon light in LA. You'll want bright light from 10 a.m. to 4 p.m. on pre-flight days. It pushes your clock forward so landing at Heathrow in late morning doesn't feel like the middle of the night.
- Sleep through the LA to London crossing. Departing at 5:05 p.m. and landing at 11:35 a.m., you'll take Flightmode Sleep soon after takeoff and treat the flight as one long sleep window. Eat at the airport so you're not choosing between the dinner cart and rest.
- Settle into London on arrival day. Once you land, get outside from 3 p.m. to 9 p.m. and take Flightmode Sleep around 1 a.m. that night. By day two you're waking and caffeinating on London time after an 8-hour clock shift.
- Flightmode Sleep and Wake hold the schedule. Sleep backs each bedtime cue, and Wake keeps caffeine timed to London, not LA.
Your LA → London jet lag plan
BA280 · 8-hour eastbound shift
Times shown in departure airport time.
Beat the LA → London shift
Your Jet Lag Plan, in a Gummy
The Travel Planner sets the crossover point for your specific flight and pre-shift, which on an eight hour route is the difference between recovering in three days and six.
- Sleep gummy + Wake gummy in every kit
- AI planner timed to LA → London
- 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 London?
About six and a half days untreated, three with a pre-shift.
Is LA to London worse than New York to London?
Meaningfully worse. Eight zones instead of five, plus a longer flight and a departure time that makes sleeping harder.
Should I take the earlier or later LAX departure?
Earlier. A 3pm departure gives you a longer sleep window and a slightly later arrival, both of which help.
Do I get morning light when I land in London?
Not on day one. Wait until early afternoon unless you pre-shifted, in which case mid-morning is fine.
Is coming home from London easier?
Yes, by roughly a third. Westbound is a delay and delays are easier.