my son has a british passport.Is it possible for him to travel to USA without visa?

as long as there is at least 6 months left on passport before the date u travel and he had no criminal convictions he should be fine

NO HE NEEDS A VISA

He will probably not need a full blown Visa, but he will need to do the online Visa waiver bit (See URL below) - basically it is like the repalcement for the old Visa waiver that used to be handed out on the plane.

No. You must have a visa and it has to be applied for online now before you reach the airport or you cannot fly.

Yes, he can travel under the Visa Waiver scheme.

See: http://london.usembassy.gov/cons_new/visa/niv/mrp_bio.html

For full details.

Edit: When you book your flight ticket you will be directed to the page where you fill in the new style visa waiver form, it's the same questions as the old form but it must be completed online at least 48 hours prior to travel.

"Mrs. Bewick" gave you the correct answer. he does not need a visa. However, he does need to register for the new ESTA program on-line. See site below.

If he has no criminal history he can travel from the UK to the USA without a visa, but must register on the Electronic System for Travel Authorisation (ESTA) online at:

https://esta.cbp.dhs.gov/

By the way, DO NOT use any websites that try to charge an "arrangement fee" for registering you with ESTA. This is a scam! Registering on ESTA is totally free and can be done on the website linked above.

This is a news story about the scam:

http://www.bviplatinum.com/news.php?section=article&source=1232300796

Most UK citizens can enter the US under the Visa Waiver Program and therefore, as the name suggests, with the need for a visa. There are exceptions susch as if he has a criminal record.

Your son will need to apply for a travel authorisation. This can done be online https://esta.cbp.dhs.gov/esta/esta.html?_flowExecutionKey=_c172C5C08-8422-03AD-07D1-01A3CB67F67B_k42475F87-1075-7F9A-C314-044CF17C7107 and should be done as immigration will take a bit longer.