Depending on your usecase, you may be able to write/extend the JavaScript Code. During my research I did not find a built-in way to perform redirects with the website frontend Odoo JSON API (using JavaScript _rpc requests). Finally, I used a similar approach as you can see in 

\https://github.com/odoo/odoo/blob/14.0/addons/portal/static/src/js/portal_signature.js#L128

this._rpc({
  ...
}).then(function(data) {
  if (data.force_refresh) {
    if (data.redirect_url) {
      window.location = data.redirect_url;
    } else {
      \window.location.reload();
    }
    // to avoid triggering chained .then callbacks
    return Promise.reject();
  }
  ...
})

where the route returns a dict à la 

return {
    'force_refresh': True,
    'redirect_url': ...,
)
For the sake of completeness: in the admin backend there is a build-in way, return a URL action
return {
    'type': 'ir.actions.act_url',
    'url': url,
    'target': 'self',
}

Hi, you can check this:

https://youtu.be/zqFuvqnC3zs

Hope it helps