Is the pro rata share that a passenger pays limited to the time he spends in the plane, or can it apply to the whole “operation”? Let’s say my friend, who lives 100 miles away, asks me to fly him on a tour of his hometown. I take off from my home airport, fly 2 hours to his local airport, and land to pick him up. After flying him on a 1 hour tour, I drop him off and return, solo, to my home airport. Upon landing, 2 hours later, I refuel and, finding that I spent 100 dollars on gas for the entire day, prompt him to pay me 50 bucks. Given I made all legs of the flight for the sole purpose of entertaining his desire. Is my request for 50 dollars legal? Or, given that he was only in the plane for 1 hour out of 5, am I only entitled to 20?

  • 1
    $\begingroup$ This is a violation of the FARs, but this kind of thing happens all the time. The FAA neither notices nor cares about it unless there is some other reason for them to get involved in the flight. $\endgroup$
    – JScarry
    Commented Oct 23, 2018 at 18:28
  • $\begingroup$ "asks me to fly him on a tour of his hometown" - you are breaking the law. You wouldn't have made the flight without being asked. $\endgroup$
    – Steve Kuo
    Commented Oct 24, 2018 at 15:48
  • $\begingroup$ @Steve Kyoto, BS. Quote me the CFR that describes who is allowed to come up with the idea of going flying. Now I agree that this particular case is on or past the edge due to the multiple legs, but friends go flying all the time. Nothing says it always has to be the pilot’s idea. $\endgroup$ Commented Aug 6, 2020 at 6:00

2 Answers 2


The situation you're describing is a commercial operation. Without a commercial certificate (and a part 135 operation) you may not receive any compensation at all.

The FAA has consistently held that the 61.113's non-compensation exemption in 61.113(c) requires common purpose for the pilot and passengers (Bobertz - 2009, p.2):

Absent a bona fide common purpose for their travel, reimbursement for the pro rata share of operating expenses constitutes compensation and the flights would be considered a commercial operation for which a part 119 certificate is required.

There is unfortunately not a strict definition of common purpose. However, the basic ground rule is that to fall under 61.113(c), the pilot must have their own reason for making the flight, independent of the passenger's.

The Bobertz interpretation presents an illustrative example: if a pilot wanted to go to a race, they could bring contestants to the race as passengers, and receive compensation. Because the pilot was flying there for the purpose of attending the race, common purpose is established, and pro-rata cost sharing is permitted.

However, if not all of the members of the race team could fit in the plane, the pilot could not share the cost to go back to the origin to make a second trip: there's no independent reason to do so. This crosses the line into a commercial operation, so no compensation is allowed.

Applying these guidelines to your question, the key phrase here is:

I made all legs of the flight for the sole purpose of entertaining his desire.

There is clearly no common purpose. Therefore, accepting any compensation for the flight, even a pro-rata cost, is compensation in violation of 61.113.

  • $\begingroup$ There's a grey area here for sure but in practice I don't think the FAA would have any interest in this scenario. They just don't care about a pilot taking a friend for a flight - it happens every day - and private pilots have to be able to use their privileges otherwise what's the point? If the friend offers to pay all the costs, or asks the pilot to take him somewhere on business, or to fly him somewhere every week, that's clearly commercial. $\endgroup$
    – Pondlife
    Commented Mar 11, 2018 at 15:50
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    $\begingroup$ @Pondlife There isn't a grey area at all. The FAA has consistently held this position since at least 1985. Whether they would consider this situation not big enough to enforce is unknown, but the rules themselves are 100% clear - and the question was "is this legal", not "could I get away with this". $\endgroup$
    – NathanG
    Commented Mar 11, 2018 at 16:26
  • $\begingroup$ Agree...this is pretty clear cut. Chris is probably a commercial op in this scenario. He could be dinged even without any money changing hands. $\endgroup$
    – acpilot
    Commented Mar 11, 2018 at 20:52
  • $\begingroup$ Fair enough, I re-read Bobertz and it does indeed seem like a very similar scenario to this one so I've deleted my answer. $\endgroup$
    – Pondlife
    Commented Mar 16, 2018 at 18:57

Past FAA legal interpretations have held that "building flight time" is considered compensation. So any expense (e.g. fuel cost) relating to the solo flight time you acquired enroute to your friend's house, if reimbursed to you in part by him, would be considered compensation and not allowed under the circumstances you describe. Once he is onboard 61.113(c) specifically allows a pro rata share of operating expenses to be paid by him to you.

Here is a relevant excerpt from a legal interpretation. Although the underlying circumstances prompting the interpretation are different (glider towing), the essential principle (compensation) is the same.

(emphasis mine)

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Here is a copy of the complete interpretation: (legal interpretation)


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