30 day visas can be obtained on arrival at most entry points into Laos. In most cases it is cheaper and easier to get the visa at the border than at an embassy or consulate.
At the more out of the way entry points you may have to wait some time while immigration issues a visa.
You will need the following documentation:
Passport sized photograph
Visa fee of $US 35
Foreigner entry points are;
All international airports;
Cambodia;
Dong Kralor - Veun Kham.
Xieng Kok River port.
Sobhun Checkpoint.
China;
Mohan - Boten.
Xiengkok riverport. (No visa on Arrival)
Sohun Checkpoint. (No visa on Arrival)
Thailand;
Chiang Khong - Houy Xai: (Chiang Rai Province - Bokeo province)
Nakaxeng - Kaenthao (Loei province - Sayabouly Province)
Nong Khai - Vientiane (Thai-Lao - Friendship bridge)
Bungkan - Pakxan (Nong Khai province - Bolikhamxai province), (No visa on arrival)
Nakorn Phanom - Thakhaek (Nakorn Phanom province - Khammouane province)
Mukdaharn - Savannakhet (Mukdaharn province - Savannakhet province via Thai-Lao Friendship border 2)
Chong Mek - Vangtao (Ubon Rathchathani Province - Champassak Province)
Vietnam;
Tay Trang- Sobhoun (Laichau to Pongsaly)
Nameo - Banteui (Thanh Hua to Huaphanh)
Namkan - NamCan (Nge An to Xiengkhuang)
Keoneua - Namphao (Hatinh to Bolikhamxai)
Chalo - Napao (Guangbinh to Khammoun) (No visa on arrival)
Lao Bao - Dansavanh (Quang Tri to Savannakhet)
Bo Y - Phukeua (KonTum to Attapu)
Laos visa information
Laos embassies