The cost of airfare is going up because of what?

• rising fuel prices
  The cost of travel is going up, and it's not just about the expense of buying a ticket. With airlines struggling to operate due to rising fuel prices and bad management over the past several years, passengers are bearing the brunt of increased costs associated with air travel. When is the cheapest time to fly?
• bad airline management
  The cost of travel is going up, and it's not just about the expense of buying a ticket. With airlines struggling to operate due to rising fuel prices and bad management over the past several years, passengers are bearing the brunt of increased costs associated with air travel. When is the cheapest time to fly?
• all of the above
  The cost of travel is going up, and it's not just about the expense of buying a ticket. With airlines struggling to operate due to rising fuel prices and bad management over the past several years, passengers are bearing the brunt of increased costs associated with air travel. When is the cheapest time to fly?