English-to-Spanish Translators on Upwork cost $18–$28/hr.

• An experienced English-to-Spanish translator may command higher fees but also work faster, have more-specialized areas of expertise, and deliver higher-quality work.
• A contractor who is still in the process of building a client base may price their English-to-Spanish translation services more competitively. 

Rates typically charged by English-to-Spanish translator on Upwork are:

• Beginner: $15 per hour
• Intermediate: $25 per hour
• Advanced: $40 per hour

Which one is right for you will depend on the specifics of your project.