Business Class upgrade from £99pp one way is valid on the inbound flight only. Upgrade both ways from £799pp. Flying with Air China from London Heathrow. Valid for travel 16 Oct - 06 Dec 2018 and 01 Jan - 31 May 2019. Subject to availability. Lounge access applicable when connecting to a business class flight only. Chauffeur airport transfers not permitted. A larger deposit may be required when booking. On sale 13 May - 11 June 2018 unless sold out prior.