Challenge yourself to add to your distance daily. I won't have the equipment I need on the road. I don't even have the space to pack running shoes. This one won't get you off the hook either. Call ahead to ask if yours does, and save yourself the added luggage.
Some hotels offer in-room workout equipment.
Again, call ahead to check. Laminate a sheet of instructions for an exercise routine, and keep it in your suitcase. Then you're ready to go, in every destination. Pack a jump rope, resistance bands, or aqua bells. They take up little room and can be part of a substantial workout.