For making a new Spain visa application, one can send an application online. So, here is how the Schengen visa has to be applied online. With this, you can get your Spain visa in just one week.
This needs a covering letter where you need to clearly mention your plan. In case you are working somewhere, you will have to get a leave letter from the employer. And in case of students, you will need a no objection letter from authorities in the school.
In the flight itinerary for your visa application, there will be complete flight information, airport information, travel date, name of flight, etc. all of which needs to be received at the end of a travel agent. You will also need an accommodation proof which is the proof towards hostel boking or hotel booking at Spain.
You also need a health insurance of at least €30,000.