Nice phrase for fast and advanced communication of distance to time:
Warsaw is within one-hour flying distance from Szczecin.
Bear in mind that you use singular time reference here, even if it will be 2 or 3 hours, as ‘hour’ becomes adjective here and it does not have pliural ‘-s’ form in English. Thus:
- London is within three-hour (not: hours) flying distance from Berlin.
In consequence, when you fly to Lake Garda to do some trekking there:
- Lake Garda is within three-hour trekking distance from Roveretto.
Or, if you fly to Venice to do some sailing somewhere there:
- Lido di Jesolo is within two-hour sailing distance from Venice.
Time superiority of aviation over driving is perfectly illustrated here:
- Barcelona is within two-day driving distance from Berlin- Barcelona is within three-hour flying distance from Berlin.