Alongside British Airways flights, we list many codeshare services on ba.com operated by our oneworld partners as well as Aer Lingus, airBaltic, Airlink, Bangkok Airways, China Southern, Fiji Airways, IndiGo, Kenya Airways, Loganair, Vistara and Vueling Airlines.

Yes, Aer Lingus and British Airways are close partners and are both owned by the same parent company, International Airlines Group (IAG). While they operate as separate brands with distinct hubs (Dublin for Aer Lingus and London for British Airways), they share extensive codeshare agreements and loyalty integration. In 2026, members of the British Airways Executive Club can earn and redeem Avios on Aer Lingus flights, and vice versa. However, a key distinction remains: while British Airways is a founding member of the oneworld alliance, Aer Lingus is not currently a member of the alliance. This means that while you can use Avios across both, you may not receive the same "oneworld Sapphire" or "Emerald" perks (like lounge access or extra baggage) when flying Aer Lingus unless you are specifically booked on a BA-coded flight or hold specific status that transcends the alliance through IAG’s internal "AerClub" and "Executive Club" reciprocal agreements.