Air Belgium is a small Belgian cargo and charted flights operator based in Brussels. This machine OO-ABF apparently carries rather tourists than totally cargo? This is an Airbus A330 version 941. It had its first flight in March 2019 as a machine of Air Berlin. After Air Berlin went bankrupt, this one flew for a while for Air Rwndair and now since Dec 2021 for Air Belgium. Back to basics - it's again an "AB" machine.
Picture from Amsterdam Schiphol 12.6.2023 by Ilkka Siissalo.

Chair is a very small Swiss leisure flights operator. Chair has only this one A320 and two old A319 machines. Formerly Chair was known as Germania Flug and used also the marketing name Holiday Jet. Chair operates flights from Switzerland, Germany and France (Basel EuroAirport) mainly to destinations in the eastern European area and eastern Mediterranean.
Picture from Zürich Kloten 15.5.2023 by Ilkka Siissalo.

The airline Plus Ultra Líneas Aéreas was founded by a manager of the earlier Air Madrid, which went bankrupt. Plus Ultra is a long distance flights airline specialising in connections from Madrid Barajas to Latin American countries such as Cuba, Chile, Colombia, Dominican Republic, Equador, Equatorial Guinea, Peru and Venezuela. Many of its routes have lately been terminated or suspended. The company has five Airbus A330 machines and this one A340 (says Wikipedia, but that's wrong... See below.). This one is an old A340-300 EC-NBU which is planned to be retired in 2025.
Picture from Madrid Barajas 12.6.2023 by Ilkka Siissalo.

The same A340-300 EC-NBU just about to leave.
Picture from Madrid Barajas 12.6.2023 by Ilkka Siissalo.

This is an absolutely lousy picture because of the heat and long distance, but I just put it here to prove that what is written in Wikipedia that Plus Ultra would have just one Airbus A340 cannot be true, if even I can take photos of two of them on the same day and they even have differing painting schemes :-P
Picture from Madrid Barajas 12.6.2023 by Ilkka Siissalo.

Privilege Style Air is a small Spanish company that offers aircraft and personnel for lease to other airlines. This machine EC-NLJ was between 1.6.2023 and 31.10.2023 flying for KLM Cityhopper using Privilege's personnel, mainly between Amsterdam Schiphol and various Spanish leisure flight destinations. EC-NLJ is an Airbus A321 version 231 taken first in use in 2007. Before Privilege Style Air it has been flying for Qatar Airways and Srilankan Airlines. The leasing contract with KLM Cityhopper ended at the end of October 2023.
Picture from Amsterdam Schiphol 12.6.2023 by Ilkka Siissalo.

The same Privilege Style Air A321 as shown above, here parked at the terminal.
Picture from Amsterdam Schiphol 12.6.2023 by Ilkka Siissalo.

Wamos Air is a leisure journeys and cargo airline from Spain, which nowadays operates only with Airbus A330 planes, some of them only for cargo, some for tourists. Earlier they used also Boeing B747-400 jumbo jets. Wamos is flying to Cuba, Dominican Republic, Mexico and of course Spain. Earlier the company was called Pullmantur. This is the Airbus A330 EC-NCK.
Picture from Frankfurt airport 29.5.2022 by Ilkka Siissalo.