For me it depended on freeway speed, ac/heater, outside temp, etc
But if I started at 270 miles I really only felt I got half that. The issue for me was range anxiety was constant on long drives because even if you had “miles” it was really hard to know if you could truly count on that when charging stations were separated by 70-100 miles, etc.
I had a 5 hour drive that had me stop for 3 charges with each charging station (electrify America) being a pain to use… though I probably could have made it with 2 charges I just couldn’t risk the last leg. Oh and that was with me using the heater just to warm me up enough before shutting it off to preserve battery .
I sold my car the next week.