A brand new ATR 72 version 600 of Air Serbia. Note how the passengers move in and out only via the back door and there's a large cargo compartment in the front. This was normal practise with the smaller ATR 42 planes but not normal with these bigger ATR 72 models.
Picture from Sarajevo, Bosnia and Herzegovina 11.10.2023 by Markku Salo.

Carpatair is a Romanian private company which flies with Airbus A319 and A320 aircraft. Their main business is flying leisure flights but during silent months in that business they also do "wet leasing" of their planes. Here this Carpatait A319 YR-ABA was flying on behalf of Air Baltic on their route from Helsinki to Riga.
Picture from Helsinki-Vantaa airport 24.8.2024 by Markku Salo.

Smartwings Hungary Kft., formerly named Travel Service Hungary, is an airline based in Budapest, Hungary, operating charter flights out of Budapest Ferihegy International Airport. It was founded in 2001 and is a subsidiary of Smartwings from the Czech Republic.

HA-LKG is a Boeing B737-800 jet which was delivered as OK-TVB in 2002 to the Czech Travel Services group. It has a long list of registered users and owners, but in practise it has all the time been a leisure flights machine for the Travel Services group, which was later renamed to Smartwings.
Picture from Paris Charles de Gaulle international airport 11.11.2019 by Ilkka Siissalo.

OK-TSM still carries the paintings/tapings of Travel services, although the name of the company group has changed from Travel services to Smartwings already in 2018. This machine belongs now to Smartwings of Czech Republic, which is the parent company of the group. Smartwings operates leisure flights from the Czech Republic and Hungary to Near East arab countries as well as major European capitals.

This machine OK-TSM is a Boeing B737-800 NG extended range machine. It was originally delivered to SpiceJet of India in 2007 where it served until 2014. Then it was returned to the BBAM Aircraft Leasing & Management Integrated Marketing Agency of USA. Then it was rented for a while to Sunexpress of Turkey. It came back to BBAM in 2015. From January 2015 it has worked as a leased machine for Travel Services / Smartwings.
Picture from Paris Charles de Gaulle international airport 11.11.2019 by Ilkka Siissalo.