Public transport is the term used in the Air Navigation Order 2016, which governs non-Part-21 aircraft such as permit aircraft and microlights. The legislation cited here doesn't quote the ANO's own definition, so this entry relies on the CAA's explanation. CAP 1590 (guidance), para 4 says that, as with CAT, "Under the UK Air Navigation Order 2016 (the Order), similar circumstances exist where the flight would be defined as a Public Transport (PT) flight."
CAP 1590 para 7 explains that "Article 13 of the Order also allows cost-sharing for what would otherwise be a PT flight". Article 13 is headed "Public transport and commercial operations – exceptions – cost sharing", and it treats a flight as non-commercial if the only valuable consideration is a contribution to the direct costs and the criteria in art. 13(2) are met.
The ANO wording differs from NCO.GEN.102 in a few places. The safety warning under art. 13(2)(f) refers to "a Commercial Air Transport (CAT) or Public Transport (PT) flight", and art. 13(3)(a) allows an advert to be placed "by the pilot or operator of the flight".
If a flight is PT, CAP 1590 para 5 says it needs an AOC, a pilot with at least a CPL and suitably certificated aircraft. Flying for public transport without an AOC is listed in ANO Schedule 13 Part 3 (art. 101(1)).
Source: CAP 1590 (guidance), paras 4-5 and 7; ANO 2016, art. 13
Read more in our guides
- Is my flight legal? A cost-sharing decision flowchart Eight yes-or-no questions that tell you whether your flight qualifies as a legal UK cost-shared flight under the rules in force since October 2025.
- What changed on 1 October 2025 for cost sharing A before and after table of the UK cost sharing rule changes from 1 October 2025, and what they mean in practice for private pilots flying passengers.
- Cost sharing vs charter: when you need an AOC How a cost sharing flight differs from commercial air transport, when an AOC and a CPL are needed, what valuable consideration means, and the penalties.
Related terms
Back to the glossary. Definitions summarise the legislation and CAA guidance and are not legal advice.