Korean Air will expand its use of sustainable aviation fuels, operating a SAF blend on more flights to Japan.

The SkyTeam operator says it will use a 1% SAF blend on flights between Seoul Incheon and Kobe, as well as between Seoul Gimpo and Osaka through 31 December 2026.

The airline's SAF is sourced from domestic suppliers HD Hyundai Oilbank and GS Caltex with used cooking oil as its feedstock.

This comes after the carrier used a SAF blend on flights between Seoul Incheon and Tokyo Haneda for a trial period between August 2024 and August 2025.

On 18 September, several major international operators - including the likes of American Airlines, Cathay Pacific, Singapore Airlines and IAG - rolled out a new investment fund aimed at scaling SAF production.

The fund has raised over $150 million and will support next-generation SAF production, as well as growth of "alternative fuel markets" and supply chains to meet the airline sector's projected long-term demand.