Time Difference and Jet Lag to Popular Destinations: A Traveler’s Guide

Tokyo is 14 hours ahead of New York in winter and 13 hours ahead in summer, yet Tokyo never changes its clocks. The extra hour comes from the US side. Bangkok, Bali, Singapore, Manila and Dubai also stay on one time all year, so the gap you plan around in January is not the gap you live with in July. The table below gives both numbers for 11 destinations.

After the table comes the plan: which dates the gap shifts in 2026 and 2027, what to do on each of the first three days by flight direction, when to land, and how to schedule a first tour and a hotel check-in around a body clock that is still on home time.

Time Difference and Jet Lag Table for 11 Destinations

Each cell shows January / July. A plus sign means the destination clock is ahead of the starting point, so +13 / +12 under US Eastern means 13 hours ahead in January and 12 hours ahead in July. A minus sign means behind.

The offsets and daylight saving rules match the IANA time zone database, and the 2026 and 2027 changeover dates below were cross-checked against the UK government and timeanddate.com. For US Central, add 1 hour to the US Eastern column. For US Mountain, subtract 1 hour from the US Pacific column. Hawaii and most of Arizona skip daylight saving, so their gap to a fixed-clock Asian city never changes.

Two rows need a note. Indonesia has three time zones and Bali sits in the central one (WITA), the same clock as Singapore and Manila, but Jakarta is an hour behind. Mexico City abolished daylight saving in October 2022, which means it is now the one row on this list where only the US side moves.

How the Jet-Lag Rating Works

The rating counts the clock shift from US Eastern the short way round, in either season. Tokyo at +14 hours is the same shift as 10 hours the other way, so it rates as 10. The scale is a planning label for how much you should adjust your schedule, not a medical measure.

• Minimal. 1 to 3 hours. Mexico City from either US coast.
• Moderate. 4 to 6 hours. London, Paris and Rome from the US.
• High. 7 to 9 hours. Dubai from the US East Coast, and Sydney in the northern winter.
• Very high. 10 to 12 hours. Tokyo, Osaka, Kyoto, Bangkok, Bali, Singapore and Manila from the US, and Sydney in July.

Around a 12-hour gap, flight direction barely matters. Local landing time and daylight matter more, which is why the plans below are built around those. The scale also changes with your starting point. From London, Bangkok is 7 hours ahead (6 in summer), rated high. From Sydney, Bali is only 2 or 3 hours behind, rated minimal.

Daylight Saving Traps: When the Time Difference Changes

The US, the UK and Europe, and Australia each change clocks on their own dates. For a few weeks a year the gap is neither the January number nor the July number. Japan, Thailand, Singapore, Indonesia, the Philippines and the UAE do not change clocks at all. Sydney is the odd case: it moves in October and April, the opposite season to the northern hemisphere. Queensland, Western Australia and the Northern Territory do not observe daylight saving, so check the state before using the Sydney row for Brisbane or Perth.

The UK government publishes its dates on the clock change page and timeanddate.com keeps a year-by-year daylight saving calendar. Treat any date more than a year out as the current rule, not a promise, because governments occasionally change them.

The Sydney to New York gap shows how many versions one route has. It runs 16 hours from 1 November 2026 to 13 March 2027, 15 hours from 14 March to 3 April, 14 hours from 4 April to 2 October, and 15 hours again from 3 October until the US changes back on 7 November 2027. Four different numbers in one year is why a fixed rule of thumb fails for Australia.

• Calls and deadlines. Write the city next to every time you share. Free-cancellation cutoffs, tour pickups and check-in windows are all in local time at the destination.
• The four-hour weeks. If you are meeting someone in London in March or late October, the gap to New York can be 4 hours, not 5, for a week or three.
• Travel across a changeover. Ticketed departure and arrival times are local, so a flight that crosses a clock change shows a duration an hour off what the clock difference alone suggests. Trust the booked duration.

Jet Lag Plan for the First 3 Days: Flying East to London, Paris, Rome and Dubai

Flying east from the US means a night flight that lands in the morning, when your body clock reads the middle of the night. Eastbound is the direction most travelers find harder, because you are asked to sleep earlier than your body wants. A widely quoted rule of thumb is about one day to adjust per time zone crossed, and it runs slower eastbound, but people vary, so treat it as a planning guide.

• Day 1, arrival. Get outside in daylight as soon as you land and keep moving. If you must nap, keep it to 20 or 30 minutes before early afternoon. Eat at local meal times and aim to stay awake until about 9 or 10pm local, even if dinner is a struggle.
• Day 2. Set an alarm for 7 or 8am local and get morning light. Plan a walking activity before lunch and your first booked tour in the afternoon. Expect an energy dip around 2 to 4pm, which is the time to stay on your feet.
• Day 3. Add an earlier start, such as a 9am museum slot. Most people feel close to normal by now on a 5 to 6 hour gap. Dubai, at 8 to 9 hours, can take a day longer.

Jet Lag Plan for the First 3 Days: Flying West to Asia and Sydney

From the US West Coast you fly across the Pacific, so the flight itself pushes your body clock west. From the East Coast, flights to Asia go over the Pacific or east through Europe or the Gulf. Either way the shift is about 12 hours, and your body will think it is noon when the destination is in the middle of the night. You also cross the date line: leave on a Monday evening and you can land on Wednesday local time, so your hotel night counts from the date you land, not the date you leave.

• Day 1, arrival. A late afternoon or evening landing is the easy case. Check in, have a local dinner, walk for 30 minutes and aim for a local bedtime of 10 or 11pm. Expect to wake at 3 or 4am. Stay in the room in low light, then go outside at sunrise. If you land in the morning, stay upright until early evening instead of crashing, and keep any nap short.
• Day 2. Get morning daylight and eat breakfast at the local hour. Keep the day light: a market, a temple, a neighborhood walk. Avoid driving a scooter or renting a car on Days 1 and 2.
• Day 3. Add your first early-start or physically demanding activity. Most travelers find the 3 or 4am waking has eased by now, though a full 12-hour shift can run into day 4 or 5.

Best Flight Arrival Times by Destination

Pick a landing window before you pick a fare. The rule that works across the table is to land between about 1pm and 9pm local in Asia and Sydney, and between about 7am and 10am in Europe and Dubai. Landing between 1am and 5am is the hardest slot because you cannot check in and the first meal is hours away.

• London, Paris, Rome and Dubai. Overnight flights land in the morning. Ask the hotel to store bags and plan a walking morning.
• Tokyo, Osaka and Kyoto. Nonstop flights from the US West Coast typically land in the afternoon or evening local time, which suits the rule. Trains in the big cities generally stop around midnight, so a landing after about 9pm calls for a transfer plan; the Japan airport guide covers the options.
• Bangkok. Flights from the US usually connect and land late at night or early morning. Last BTS trains leave around 11:30pm, so line up a taxi or ride-hail; the Bangkok airport guide has the routes.
• Singapore. Last MRT trains run around midnight and the airport is on the line, but check the Singapore airport guide for the late-night options.
• Bali. There is no metro, so the airport transfer is the plan. Pre-arrange a pickup with your flight number; the Bali airport guide covers arrival steps and transfers.
• Manila and Sydney. The same landing window applies. Sydney flights often arrive early morning, so treat Day 1 as the Europe-style morning-arrival plan.

Scheduling a First-Day Tour and Late Check-In

Book the first paid tour for Day 2 afternoon or Day 3, and choose free cancellation. A 4am Mt Fuji start or a dawn volcano trek on Day 1 is the classic way to waste a booking. The Mt Fuji day trip rests on a 5:30am go-or-skip decision, so it fits best from Day 3.

• Morning landing. Standard check-in is often mid-afternoon, but policies vary, so confirm yours. Either book the previous night so the room is ready on arrival, or ask for early check-in and store bags.
• After midnight landing. Tell the property your flight number and arrival time in writing. Some properties staff the front desk around the clock and others do not, so confirm a late arrival before you fly rather than at the door. Count the booking from the date you land locally.
• Tours. Pickup times are in destination local time. Match them to the day, not to the hour your body thinks it is.
• Itineraries. The first-timer plans for Bali, Bangkok, Japan, the Philippines and Singapore assume you start fresh. Slide the busiest stop on Day 1 to Day 2 and move the rest.

Time Difference on the Way Home

Flying back from Asia to the US you cross the date line the other way, so many flights land on the same calendar day they left, often earlier on the clock. The adjustment is westward on your body clock, which many travelers find easier. Keep local US hours from the moment you land, get daylight, and stay up until a normal bedtime. Check your return date against the table too: a flight home in the first week of November can cross the US changeover.

One more thing to sort before you fly: which plug adapter to pack for Southeast Asia and Japan.