British Airways and Iberia parent International Consolidated Airlines Group said airline traffic, as measured in revenue passenger kilometres, rose 3.9% in June compared to the same month last year.
IAG, which also owns Aer Lingus and Spanish budget brand Vueling, said group capacity measured in available seat kilometres was up 3.5%.

Meanwhile, group premium traffic for the month of June increased by 6.8% compared to the previous year.

The load factor – which measures how full flights were – edged up to 84.3% from 84% a year ago, while for the year to date IAG's load factor nosed up to 80.9 for the first half of 2017 versus the 80.0 in 2016.

These numbers follow May's 1.8 % traffic increase and 0.9% capacity gain.

Spanish arm Iberia has been awarded a four star rating by Skytrax, which the FTSE 100 group noted reflected its punctuality improvement, product upgrades and excellent customer service.

Midway through last month, British Airways cabin crew called a two week strike and alongside union Unite threatened IAG with legal action after 1,400 cabin crew were sanctioned for striking as part of a long-running pay dispute.

The strike began on midnight on Saturday 1 July as is expected to run until Sunday 16 July, as the union accused BA of forming a blacklist to impose sanctions on striking cabin crew, which it said included the withdrawal of bonus payments “worth hundreds of pounds” and staff travel concessions.

BA pledged the airline would still fly all customers to their destinations.