Twenty hours with children, done properly.

The shape of the journey

There is no nonstop service between the mainland United States or Canada and Bangkok. Every journey is at least one stop. From the East Coast, total elapsed time typically runs nineteen to twenty three hours; from the West Coast, seventeen to twenty one; from Toronto or Montreal, around twenty to twenty three. Bangkok is eleven hours ahead of New York and fourteen ahead of Los Angeles when the northern hemisphere is on daylight time, and twelve and fifteen respectively when it is not. That is close to a full inversion of the clock, which is the real problem to be solved. The flying is merely tedious. The time shift is what costs you days.

Two structural facts help. First, westbound travel across many time zones is generally the harder direction for the body clock, meaning the outbound trip usually hurts more than the return. Plan the soft landing at the Thai end, not the American one. Second, the journey has a natural asymmetry: one very long leg and one shorter one. Which comes first depends on the routing, and it is a genuine choice rather than an accident of the schedule.

Routing via the Gulf

From the East Coast and the eastern half of the country, the Gulf corridor through Doha, Dubai or Abu Dhabi is the natural line: a twelve to fourteen hour leg eastbound out of New York, Boston, Washington, Miami, Chicago, Dallas or Houston, then six to seven hours southeast to Bangkok. The advantages are real. The hard leg comes first, while everybody still has reserves. The connecting airports are modern, well equipped and comfortable with families, with lounges, showers and quiet areas that make a four hour layover restorative rather than punishing. And the second leg arrives in Bangkok at a civilised hour on many schedules.

The disadvantage is total elapsed time, which is usually a little longer than the Pacific route, and the fact that a delay on the first leg puts you a long way from home with a missed connection. For families we generally prefer this corridor from anywhere east of the Mississippi, and we build in a connection of three to five hours rather than the tightest legal one, because the buffer buys you a shower, a real meal and a walk, and because a two hour connection with three children and a delayed inbound is a scenario nobody enjoys twice.

Routing via East Asia

From the West Coast and from Vancouver, the Pacific corridor through Tokyo, Seoul, Taipei or Hong Kong is usually faster and, in our experience, gentler. The first leg runs ten to thirteen hours across the Pacific and the second is a short five to six hours into Bangkok. The North Asian hub airports are among the calmest and best organised in the world, with excellent food, genuinely good family facilities and transit processes that do not test anyone's patience.

The trade off is that the short leg comes last, at the point when everybody is most tired and least tolerant of another boarding process, and that some of these connections land in Bangkok late in the evening. Where the schedules allow, we look for a Pacific routing with a mid to late afternoon Bangkok arrival, which is the single most valuable piece of scheduling in the whole exercise. From the middle of the country either corridor works, and the honest tiebreaker is usually which alliance holds your status, because status is worth more on a journey like this than on any other.

The cabin decision

On a journey of this length the cabin is not a luxury question, it is a recovery question, and we say that to clients who are otherwise indifferent to such things. A flat bed on the long leg means an adult who arrives able to make decisions. For children the calculus is different and less obvious: small children sleep well almost anywhere and gain relatively little from a flat bed, while teenagers gain a great deal. Many families we book put the adults and older children in the premium cabin on the long leg and take a more modest cabin on the short leg, which is where the money does the least work.

• Book seats at the moment of ticketing, not at check in. Family seating is the first thing to disappear on a full long haul flight.
• Bassinet positions at the bulkhead must be requested with the airline directly and confirmed; they are allocated separately from ordinary seats and by weight and age limits.
• Avoid the last row of a cabin with children if you can, because of seat recline limits and galley noise.
• Check the aircraft type as well as the airline. The cabin product on the same route can differ substantially between aircraft.
• For a family of four or five, a two by two configuration on the long leg is often more workable than a wider premium layout that separates the group.
• Confirm special meals at least seventy two hours out and then again at check in, because they are the most commonly missed item on a long itinerary.

The connection is the part people get wrong

Families instinctively book the shortest connection because it minimises the number on the itinerary. That is the wrong optimisation. A ninety minute connection at a large hub, with a long inbound behind you, a terminal change ahead of you and a stroller to retrieve, is where family journeys fall apart. Three to five hours is our default for a family, and at hubs with good lounge and shower facilities we will go longer without hesitation.

Use the time deliberately. Shower if the facility exists, and every major Gulf and North Asian hub has them in one form or another. Feed everyone a proper meal on the ground rather than relying on a second airline dinner. Walk the children until they are genuinely tired. Change into fresh clothes for the second leg. And reset watches and phones to Bangkok time at the connection, not on arrival, because the mental transition matters more than most people credit. A stopover of a full night in Doha, Dubai, Tokyo or Hong Kong is also a legitimate strategy for families with young children, and for some it converts the worst part of the trip into the first good part of the holiday.

Jet lag, managed rather than endured

The general principles are well established and we set them out here as travel practice, not as medical guidance. Adopt destination time as early as you can, including sleeping and eating on the new schedule during the second leg. Get outdoor daylight on the first morning in Bangkok, which is easy in a country with reliable sun. Keep everybody hydrated and go easy on alcohol on the aircraft. Keep the first afternoon nap short and early if one is unavoidable, and get everyone through to a normal local bedtime on night one even if it is unpleasant. Eating on local mealtimes helps more than people expect.

A rough working expectation for a shift of this size is around a day of adjustment per two time zones for adults, less for young children, who often reset faster than their parents and simply do it on their own timetable rather than yours. Families that plan a demanding first two days, meetings, a school visit, a domestic flight to an island, routinely regret it. Anything involving sleep aids, melatonin or medication for children is a conversation for your own physician and not for a travel guide, and we will not offer a view on it.

The first forty eight hours in Bangkok

How you handle arrival day sets the week. Suvarnabhumi immigration queues vary enormously by hour, and the arrival of several wide bodies together can mean a long stand after a long flight. Fast track and meet and assist services exist and, for a family arriving with grandparents or small children, are among the better value items on the whole trip. Pre arranged transport with the correct number of car seats, arranged in advance rather than negotiated at the kerb, is the other. Bangkok traffic on the expressway from the airport can run forty minutes or ninety depending on when you land.

For the first two days we plan light and local: a hotel with a pool, meals nearby, an outdoor morning, nothing that requires the family to cross the city or catch anything. Do not schedule the domestic flight to Phuket or Samui for the morning after arrival if it can be avoided; a night or two in Bangkok first costs a little and saves a great deal. And do not book the school visit, the property viewing or the bank appointment before day three, because you will not be at your best and the people you are meeting will remember the version of you they met.

Handle the paperwork before you fly. The Thailand Digital Arrival Card is completed online in advance and airlines increasingly check it at departure, so it belongs on the pre flight list with passports and insurance rather than being discovered at the check in desk. Confirm current requirements before every trip.

Flight schedules, aircraft types, transit facilities and arrival formalities change frequently, and nothing here is medical advice. Verify current entry requirements and the Thailand Digital Arrival Card process with the Thai Immigration Bureau or the Royal Thai Embassy before every trip, confirm cabin product and family seating policy with the operating airline, and take any question about sleep aids or travelling with a medical condition to your own physician.

This briefing is general information, not legal, tax or investment advice. Thai rules change frequently and individual cases differ. Verify current requirements with the relevant authorities, including the Immigration Bureau, the Board of Investment, the Land Department, the Department of Business Development and the Revenue Department, and take advice on your own facts before acting.