Oneworld alliance partners Iberia and Alaska Airlines are seeking permission to codeshare on almost 80 routes operated by the Seattle-based carrier from Los Angeles (LAX) and San Francisco (SFO).
If the plans are approved, the Spanish carrier will place its IB code on domestic and international routes operated by Alaska Airlines from Los Angeles and San Francisco.
As well as further growing its domestic network with seven new routes, the oneworld alliance member is adding more Boeing 787 and Airbus A330 flights within Australia.
Australian regulators have issued a draft rejection of an application by Qantas and Japan Airlines to cooperate more closely, although Qantas says it will argue to have the decision reversed in the final ruling.