LONDON (TIP): British Airways has signed a revenue-sharing agreement with Qatar Airways, allowing the pair to co-operate on scheduling and pricing, BA’s owner IAG said in a statement on Sept 28.

State-owned Qatar Airways owns 20 percent of IAG as a result of a stake it has been building since 2015, and the companies had said further commercial agreements between the groups could come as a result of that investment.

Airlines often use revenue-share deals where they carry each other’s passengers on certain routes, giving customers a greater choice of flights and generating cost and revenue synergies for the carriers.

IAG already operates such a deal with American Airlines Group on the North Atlantic, for example.

IAG chief executive Willie Walsh said in a statement that the tie-up followed a deal IAG Cargo had signed with Qatar two years ago.

“It will also allow us to provide easier journeys with better aligned schedules, more frequencies and improved flight transfers,” Walsh said of the new deal.