I've been analyzing airline ticket prices for years, and it's striking how much more expensive it is to fly from regional airports compared to major hubs. My last round trip from Da Nang to Singapore was nearly double what I'd pay from Ho Chi Minh City, even though the distance is shorter. This price gap seems unfair to people in smaller cities, but I wonder if it's actually justified by the higher operational costs and lower demand at these airports. Should regional airline tickets be subsidized to make air travel more affordable for everyone, or is the current market pricing a reasonable reflection of supply and demand?