Thomas Cook and TUI could raise £120 million between them if the sale of their share in air traffic control system, NATS, goes ahead.
The tour operators are part of a seven-strong consortium called the Airline Group which owns 42% of NATS and includes British Airways, Virgin Atlantic and easyJet.
The Government is the biggest shareholder with 49%.
NATS is valued at about £1bn reports the Sunday Times so the 12% held by Thomas Cook and Tui could see them share £120m.
But the sale may not be imminent as The Airlines Group instructed investment bank Rothschild to look into potential investors last September, see previous story.
