A thirty-minute travel budget may cover very different distances by walking, car or public transport. A radius based on miles alone hides waiting time and the journey home.
Wording you can adapt
Compare both people’s total available window, then estimate the travel share before discussing a broad meeting area.
What this clears up
The travel estimator uses a simple speed assumption and a range. It does not use traffic, routes or live departures. Check an actual journey before turning its range into a firm plan.