Typically an e-visa takes 72 hours for processing, and in case more documents are required on your visa you will be intimated of the same within 48 hours and you need to comply in the next 72 hours. In case you take any longer than that, your visa application will be deemed cancelled. For a visa within Asia, you can expect it processed in 5 working days, but for a US visa you will have to wait for 3 to 5 weeks for your visa application to be processed. After processing, you can expect a positive response to your application and the consulate will deliver the document in two working days. Generally, it takes about 5 working days for you to receive your passport once your visa interview is a success. But for a US visa this could be about 10 days. A UK visa, on the other hand, is normally processed within 15 days. Though you are advised to apply about a month prior to your date of travel. You can always track your e-visa application status online.