If you are seeking a immediate flight from Brazil to London Heathrow, there are actually two airports from which to choose. Experience was likely the best I’ve had on BA for many years. Only issue is A380 is aged now https://forums.rivals.com/threads/%F0%9F%93%9E-1-857-346-0204-kuwait-airways-modify-booking-how-to-change-flights-and-dates-efficiently.1154305/