Trip made in December 2022.
From Barcelona to Madrid with OUIGO, a lowcost train company of French origin that operates fast trains in France and Spain.
The ticket cost me €27, but it is XL seat and additional luggage. However, they can be found from €9.
Operator: OUIGO 🇫🇷
Train: 6740 🚅
Car: 1 (start) 🚃
Seat: 32 A (XL) 💺
From: Barcelona-Sants station, Barcelona, Spain 🇪🇸
To: Madrid Puerta de Atocha Station, Madrid, Spain 🇪🇸