For quick plans if you're not interested in hazards, bathymetry, actual navigation, etc, and just want some rough distances, there's always Skyvector (SkyVector: Flight Planning / Aeronautical Charts
). It's really best for flight simulators, but it can plot multi-segment paths using click-and-drag lat/lon points, and give you leg distances (in nautical miles), times and totals.
As long as you can recognise significant places by the outline of the coast, it might be sufficient. It's certainly no substitute for a real chart, though.