- JAL Express, also known as JEX, is a regional airline based in Tokyo, Japan. It is a subsidiary of Japan Airlines (JAL) and operates flights within Japan. JAL Express was established in 1997 and began operations in 1998. It operates a fleet of Boeing 737 aircraft and focuses on connecting smaller cities in Japan. JAL Express offers a no-frills service with a focus on efficiency and affordability. The airline is known for its punctual and reliable operations, and it provides a convenient option for domestic travel within Japan.