Usually there will be two ways to get to Koh Samui.
Go by plane
Koh Samui airport, but the airport should own relatively expensive airfares. You can fly to Koh Samui from Bangkok, Phuket, Singapore, Malaysia. Thus, most will not choose this option, unless you have a high level of payment. But if you come to Samui in this way can save one little money compared to alternatives taxi ferry, because the airport is located very close to the main beach of Koh Samui (like Chaweng, Bophut).
Go By ferry
In order to Donsak Ferry Koh Samui island, you have many options like fly from Bangkok to Surat Thani airport bus terminal and go Donsak. Or take the bus from the other provinces. Like this:
From Bangkok to Surat Thani and Samui
From Bangkok you can fly to Surat Thani airport, may choose Airasia or Nok Air. Maybe Bay early morning 6.20am flight to Surat Thani by Nok Air, if you or they can go to sleep in dust from Don Muang Airport from the night before to save money on hotels. Prices of Airasia from about $ 35.
Go to Surat Thani airport, you can easily find a bus and ferry tickets to go Samui right, price is 150bath bus, ferry is 200bath. So always buy the 2 for convenience. There are bus tickets to carmakers Phaptip you waiting for a trip to the ferry. Vehicles running about 90 minutes from the airport to the ferry Don Sak. This large ferry, carrying trucks, cars, on which, on ferries have air conditioning, there are shops selling food, play time is just 1 hour ferry trip from 7-19h 1. There are many firms ferry and speedboat however Phantip bus company in conjunction with the ferry company Seatrans.
From Phuket to Samui
The travel agent in Thailand doing pretty good, you can put the bus from Phuket to Samui and back away .. Often people buy tickets combined bus + ferry too. From Phuket to Koh Samui from Phuket bus you go to Surat Thani and then ferry from ferry to ferry Nathon Donsak of Samui. Ferry Route Phuket – Koh Samui (and vice versa), the company has 3 ferries: Songserm, Seatran, and Lomprayah. Experience is genuine quality Songserm cheapest but also the worst, Ferries as liner, dirt, and or late, go long. Seatran and Lomprayah 1 bit more expensive but much better service, very comfortable and clean. Fasteners are you should go Seatrans.
Advance to the next Samui Nathon ferry terminal, from where you’ll have to catch a taxi to get to other beaches, resorts and hotels. Taxi prices in Samui usually correct price, less if you bargain. Also you can go songthew taxi is much cheaper but per capita. This car or go Thai who is no longer unfamiliar, about 15 minutes with the Terminal 1. Be sure to ask the price before not to appear topless. Note that the vehicle is a station about 700m Songtheow, you should walk out in the street to start, do not be caught minivan which will be much higher price.
Reputable bus company go from Bangkok or Phuket to Surat Thani you should choose Phantrip. When buying bus tickets at the agents you should talk clearly about cars and car manufacturers, should go to 40-seat cars for comfort, do not go all kinds of mini bus 16 seats.
The other way to go to Koh Samui
In addition to the ferry terminal for normal Donsak, also has ports for fast train Tha Thong (price 380 baht, go faster), and port for ships night Ao Bandong (price only 100 baht, take these vessels you will sleep on cruise ships, each only 1 day trip departs at 11pm, said 5g30 morning after Koh Samui. Then this boat to Koh Phan said go ngan and Koh Tao finally at about 8:30).
With this train, you may not need to stay in Surat Thani 1 night (when traveling by plane to Surat but not in time to the harbor Donsak the train passed through the roof of the night, save costs and period 1 night in Surat Thani).