The Competition and Markets Authority (CMA) confirmed on Wednesday (9 June) it had opened enforcement cases into both carriers to establish whether either had broken consumer law.
It comes as part of a wider CMA investigation into the issue, which was launched in December.
The CMA said that during periods of lockdown in the UK, both British Airways and Ryanair refused to give people refunds for flights thy couldn’t take owing to Covid legislation.
It said BA instead offered vouchers or the opportunity to rebook, and Ryanair just the option to rebook.