Abu Dhabi’s national carrier Etihad on Tuesday reported core operating losses of $400 million for the first half of the year, driven by a 68% drop in passenger revenue as highly contagious variants of the coronavirus course across the globe, AP reported.

The figure reflects the continued uncertain outlook for international travel. Over the last six months, the airline carried 1 million passengers who on average filled 24.9% of plane seats, down from 3.5 million passengers and 71% of seats filled in the first half of 2020. Tony Douglas, CEO of Etihad, lamented the “curveball of the Delta variant disrupting the global recovery in air travel.”

Etihad is one of the Middle East’s top carriers, but it was wracked by financial losses even before the pandemic clobbered the aviation industry worldwide.