How much time do you have between legs before it counts as a separate trip?
Figured this one needed a separate post. A canned one I've used before, so it's mostly a cut and paste:
Rule of thumb: unless you are being ridiculous, what you consider to be a cross country flight is pretty much up to you.
The old, orphaned, disowned Part 61 FAQ answered this type of question with "The 'original point of departure' for the purpose of a cross country does not change with a new day or delay."
More recently, in 2009, in answering a number of question questions about cross country logging (mostly regarding safety pilot scenarios), the FAA Chief Counsel made the following observation in response to a question about repositioning fights:
There is nothing in § 61.1(b)(3)(ii) or previous FAA interpretations dictating how separate flights must be logged. Accordingly, the pilot may choose what is considered a discreet flight and what is merely a segment of a flight, and then log that time appropriately when the flight is conducted. Section 61.1(b)(3)(ii) requires that the flight include a landing at a point other than the point of departure.
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[2009 Glenn Interpretation](
http://bit.ly/2ct04o2)
To me, it's about goal and intent and where and when that changes. The goal and intent of a cross country flight (plain English) is to go to a destination. Activities involved in doing that are part and parcel of of that process.
So, for example, my commercial solo cross country involved a 2-day trip in which I diverted overnight for weather. The goal was a flight to the final destination, so that was my cross country "flight." Having to divert or even make a planned stop overnight to rest. Change that stop to a 3 day planned vacation, and I would personally consider that it broke the chain of a single flight, although I wouldn't argue with with anyone who thought it was still part of the same "flight".
What is "ridiculous"? I'm not aware of anything by way of example from the FAA. It's just a sense that, as in other areas, the FAA may look at a scenario and say, "that's a sham" (nice way of saying "that's BS"). So I guess you'll know it when you see it.