Druk Air

DRUK AIR is the only airline in Bhutan.  It has two Airbus A319, flying from and to Bangkok (Thailand), Kathmandu (Nepal), Kolkata (India), Dhaka (Bangladesh), Delhi (India), Bagdogra (India), Guwahati (Indai).
http://www.drukair.com.bt/

Usually, people take flight from Bangkok(BKK) to Paro(PBH).  During summer, there is 1 direct flight flying between BKK & PBH per week.

Sat  KB129  depart BKK at 08:45pm, arrive PBH at 10:45am
Fri   KB128  depart PBH at 12:15pm, arrive BKK at 16:15pm

Vaccination

Recommended Vaccinations for travelling to Bhutan

Typhoid fever 傷寒

Polio 小兒麻痺

Cholera 霍亂

MMR 德國麻疹及流行性腮腺炎

DPT 白喉 / 百日咳 / 破傷風

Rabies 狂犬病

Hep A & Hep B 甲型&乙型肝炎

BCG 卡介苗 (預防肺結核)

Malarone for Malaria 瘧疾

此藥應在訪疫區前一天開始服食，在旅途中每天服食，離開疫區後繼續服食七天。

Acetazolamide for Mountain Sickness 高山症

在登山前一天開始服食，直至登山後數天才可停藥

Betadine (iodine based antiseptic) for insect bites

Lamisil / Clotrimazole for Fungal rash

Loperamide for diarrhoea

Links
http://wwwnc.cdc.gov/travel/destinations/bhutan.htm

http://www.travelhealth.gov.hk/tc_chi/vaccine_prophylaxis/vaccine_prophylaxis.html