Virgin Atlantic has announced it wants to fly to Guernsey and Jersey from Heathrow in future.
It is part of plans to fly to 84 new destinations from Heathrow after a third runway is opened.
The airline says the transformation of its route network depends on how many additional take-off and landing slots it has if the UK's busiest airport is expanded.
A group of councils, residents, environmental charities and London Mayor Sadiq Khan lost a High Court challenge against the Government’s decision to approve the plans for the third runway in May. But in July they were given the go-ahead to challenge the ruling.
Construction could begin in 2021 and the new runway could be opened by 2026.
Twelve of the 84 new destinations Virgin Atlantic plans to serve from Heathrow are in the UK or Channel Islands.
- Belfast City
Virgin Atlantic's planned 35 new long-haul routes include airports in North and South America, Asia and Africa.