Originally Posted by
malcolmkettering
Since both BCN-LEN and BCN-ABC are marketed by Iberia with an 8xxx flight numbers through their affiliate Air Nostrum, I think these would be allowed within a ONEWORLD ticket. LEN is Leon in north-central Spain and ABC is Albacete in south-eastern Spain. All Air Nostrum flights are ticketed as IB8XXX and Air Nostrum is an accepted OW affiliate. I think the Denim Air reference is to indicate it is operating the aircraft under a wet-lease agreement with Air Nostrum. Does that disqualify it? I believe I've earned AA miles on Air Nostrum flights such as this before so that leads me to believe these flights are eligible.
Denim Air is a extra capacity provider from the Netherlands. Air Nostrum has been contracting Denim Air from their first flight under a wet-lease contract, which means that (small) a part of the aircrafts of Air Nostrum (some of the Dash-8) belong to Denim Air, that also is in charge of contracting the pilots (but not the FAs), that usually are non-Spaniards (the majority are from Holland or from Belgium). This wet-lease helps Air Nostrum to deal with the demand as they can cut/increase temporary/permanently some aircrafts when they need it without having to hire / sack its own employees.
The "friendship" between both carriers is very deep. Now Air Nostrum has reduced considerably the weight of Denim Air, but some years ago Air Nostrum was by far one of the most important clients of Denim Air. So much that Air Nostrum bought the company and when they didn't need them that much, they sold it back to private investors from their home country.
Denim Air is not part of OneWorld, indeed, but it's not a codeshare but a wet-lease (by this I mean that the operator just follows the instructions of Air Nostrum). Denim Air "looses" its personality when they operate for Air Nostrum. The aircrafts have full Air Nostrum colours, service, interiors, etc..., and they carry the OneWorld tag.
Therefore, a Denim Air is a 100% Air Nostrum flight and there you earn points as if you had flown Air Nostrum.