Lao 15/30 visa is a short stay Laos tourist e-Visa.
The maximum length of validity for this Lao Visa is only two days (validity can be reduced) but it's the cheapest option with fees starting from less than USD6， and valid for up to one month after arrival in country(this means that you have time to do what ever you want before leaving the country on your flight back home).
It will cost less if booked online at http：//www.visalao.com or http：//visa-laos.net. If booking offline， prices are about double and there is a high risk of getting scammed as well by fake travel agencies all over SE Asia， so we suggest paying extra money via the web sites above！ It would take around 72 hours processing the application.
Note： You need an internet connection when booking these visas and some websites may block access if you use VPN etc to prevent fraudulent payment. You could try to book them directly through Facebook too， just search "VISALAO" on Facebook（the account has been created since Januaray）， but I found out last week they were not able to print receipts until they got approval from their boss. We still managed to get our passes printed yesterday， no worries～．
