I booked a first-class seat on a train from Paris to Barcelona for $177, and I didn't even care that it was 5 hours longer than the flight I paid $177 for a first-class train ticket from Paris to Barcelona. Although it was longer than a flight, it was a greener, less burdensome option. https://www.insider.com/first-class-train-paris-to-barcelona-review-worth-it-2023-11