The European aerospace firm is to take a majority stake in Bombardier's C-Series jet project.
The failing Italian airline has received seven offers from interested companies.
The Irish airline says it will take the €210m deal to European competition authorities.
How are passengers affected?
What would make your flight more fun?
The return of supersonic travel to traffic-beating flying cars
Few big orders for Boeing and Airbus this year
Why did it take BA so long to fix its problems?
Can long-haul air travel also be low cost?
Fasten your seatbelts for a short flight across the history of Britain's love affair with air travel.