Like all other seats on the plane, business-class tickets are priced based on market demand, which means the cost can vary widely by airline, route and date. In general, prices for business-class tickets can range from $4,000 to $8,000 for a round-trip ticket, so travellers should be sure to research exactly what's included in the price tag for their chosen route, date and airline. It is common for airlines to retrofit and upgrade cabins on older aircraft, but this can take time, which can mean that even on the same airlines and aircraft, business class offerings can vary.