Vietnam Airlines reported strong profit growth for the first half of 2018, and the carrier is also making progress on plans to increase productivity and reduce staff numbers.

Avianca Holdings had an unadjusted net loss of $35.7 million for the 2018 second quarter, reversed from a $10.6 million net profit in 2Q 2017, as the Colombia-based company faced currency volatility, increased fuel prices, infrastructure disruptions and continuing after-effects of a 51-day pilots’ strike in 4Q 2017.

Aircraft lessor BOC Aviation recorded a $297 million net profit for the six months to June 30, marking a 24% increase on its 2017 interim figures.

Higher fuel costs and deeper foreign exchange losses offset rising revenue for Korean Air, sending the carrier deeper into the red for the second quarter.

Airbus and Boeing commercial aircraft deliveries for 2018 year-to-date, sorted by most-recent delivery date.