A student pilot can have any current CFI review their flight plan and provide the endorsement for a solo cross-country flight, not just the CFI who initially soloed them. This is permissible provided ...
There is no indication that the flight needs to be accomplished in one day. Just make sure to double-check at least one leg ...
For the first solo cross-country, CFIs often have learners fly to an airport previously visited with an instructor, where they must demonstrate PIC abilities, diverse navigation (pilotage, dead ...
Sometimes when a private pilot does flight planning, weather is an important part of the planning. Sometimes, no matter how well a pilot does cross country flight planning, the weather can be tricky.