Is there an easy way to make sessions timeout in flask?

flask sessions expire once you close the browser unless you have a permanent session. You can possibly try the following:

from datetime import timedelta
from flask import session, app

@app.before_request
def make_session_permanent():
    session.permanent = True
    app.permanent_session_lifetime = timedelta(minutes=5)

By default in Flask, permanent_session_lifetime is set to 31 days.