On arrival at Bangkok International Airport (BKK)
The new Suvarnabhumi airport caters reasonably well for new arrivals. You should have been given an immigration form to fill in on the plane, but if not, there would be some available before you enter the immigration queues. You may find however, that even if your aircraft is at a gate, it could still be quite a walk to the immigration counters, but it is quite well equipped with escalators which makes such an eventuality fairly straight forward.
Visa and Immigration
Depending on your nationality, you may require a visa. It is advised to check before travel, although some nationalities may be able to collect one upon arrival.
Transport
Transport from Suvarnabhumi airport to various locations in and around Bangkok can easily be arranged in the airport. Bangkok, Pattaya, Hua Hin and even places as far away away as Chiang Mai are readily available. The most common form of transport to Bangkok are public taxis, limosines or airport rail link. Counters for the public taxis will assist with addresses, and the phone number of the taxi used will be given to you in case you need to contact the driver. All public taxis are fitted with meters, and if this is not switched on immediately, you should ask the driver to turn it on. Public taxi fares are some of the lowest in the world, and a trip from the airport to downtown Bangkok will very seldom be higher than THB 350 (about USD 11).
Airport Authority of Thailand (AOT) operate an efficient and reasonably priced limousine service to all points in Bangkok as well as locations further afield such as Pattaya, Rayong, Hua Hin and Cha Am. The prices are fixed and payable at the many counters located within the baggage reclaim area and the arrivals hall. The rate will include the tolls fees. Note that this service must be paid in cash and they do not accept credit cards.
The Airport Rail Link offers a fast service into town, either the express service which runs directly to Phaya Thai and takes about 15 minutes, or an all stop service. Tickets can be purchased at the counter at the station and like most other forms of transportation is quite cheap at about THB 150. However, the Airport Rail Link is not so convenient if you have large suitcases as the stations in town do not have lifts.
There are coaches which run to most major hotels downtown, and tickets can be purchased at the Airport Express counter at a cost of about THB 150. There is a free shuttle bus that runs from the airport to the Airport Transport Center bus terminal and car rentals offices. Just follow the signs at the airport.
And if you're not looking to head out straight away, the Novotel Bangkok Suvarnabhumi Airport 600 room hotel is within easy walking distance of the airport and for those with large luggage, they offer a shuttle service.
