Probably the easiest and most direct way that an online school student can attend prom is by going as the date of a student who is enrolled in a traditional school that is hosting a prom. There may be a few boxes to check in order for this to happen – many schools require guests of students to fill out attendance forms prior to the dance – but overall, it is a very simple process.
In addition, there may be an option for online students to attend the prom of a local traditional school. This very much depends on your local school district's rules, but it could be a very attractive option for students learning from home if they are already involved in the school in some way, such as extracurricular activities or other afterschool programs there, and if they already have some friends who they know will be at the prom with them.