In pictures: Busiest first class air travel routes in the world

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  1st: London Heathrow to JFK, New York (pictured). 1,116 first class seats, 159 average daily first class seats. Spencer Platt / Getty Images / AFP

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  3rd: Heathrow to Chicago O'Hare. 658 first class seats, 94 average daily first class seats. Carolyn Kaster / AP Photo

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  4th: London Heathrow (pictured) to Chhatrapati Shivaji International Airport. 504 first class seats, 72 average daily first class seats. Edmond Terakopian / AFP

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  5th: Miami International Airport to Sao Paulo-Guarulhos International Airport. 504 first class seats, 72 average daily first class seats. Gernot Hensel / EPA

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  6th: London Heathrow to Singapore Changri. 460 first class seats, 66 average daily first class seats. Roslan Rahman / AFP

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  7th - London Heathrow to Boston Logan. 384 first class seats, 55 average daily first class seats. Michael Dwyer / AP Photo

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  8th: Heathrow to Dallas Fort Worth. 378 first class seats, 54 average daily first class seats. Tony Gutierrez / AP Photo

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  9th: Heathrow to Indira Gandhi International Airport, New Delhi, India. 372 first class seats, 53 average daily first class seats. Pankaj Nangia / Bloomberg

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  10th: London Heathrow to Miami International. 364 first class seats, 52 average daily first class seats. Lynne Sladky / AP Photo

While the likes of Etihad and Emirates are going from strength-to-strength with their first class offerings, the trend of long-haul first class travel elsewhere is one of decline, according to Capa. Find out how many of the routes involve the UAE.