Flight Okayama - Niigata prices from $123.08

Air Do is a Japanese airline that operates domestic flights within Japan. The airline was established in 1996 and is based in Sapporo, Hokkaido. Air Do operates a fleet of Boeing 737 aircraft and serves destinations such as Tokyo, Osaka, and Fukuoka. The airline's name is derived from the Hokkaido dialect, where "air" means "love" and "do" means "way". Air Do aims to provide a comfortable and convenient travel experience for its passengers, with a focus on safety and reliability. The airline also offers a frequent flyer program called "Mileage Do" for its loyal customers.

Asiana Airlines is a South Korean airline that was founded in 1988. It operates both domestic and international flights to over 90 destinations across Asia, Europe, North America, and Oceania. Asiana Airlines is a member of the Star Alliance, which is the world's largest airline alliance. The airline has won numerous awards for its service, including the Skytrax 5-star rating for 12 consecutive years. Asiana Airlines is known for its comfortable seating, in-flight entertainment, and high-quality meals. The airline also offers a frequent flyer program called Asiana Club, which allows members to earn and redeem miles for flights, upgrades, and other benefits.

Hong Kong Airlines is a full-service airline based in Hong Kong. It was founded in 2006 and operates flights to over 30 destinations across Asia, Europe, North America, and Oceania. The airline's fleet consists of Airbus A320, A330, and A350 aircraft. Hong Kong Airlines offers a range of cabin classes, including Economy, Premium Economy, and Business Class. The airline is known for its affordable fares and quality service, with a focus on providing a comfortable and enjoyable travel experience for its passengers. Hong Kong Airlines is a member of the HNA Group, one of China's largest conglomerates.

Japan Airlines (JAL) is the flag carrier airline of Japan, headquartered in Tokyo. It was founded in 1951 and operates a fleet of over 170 aircraft, serving 92 destinations in 20 countries. JAL is a member of the Oneworld airline alliance and has codeshare agreements with several other airlines. The airline offers a range of classes, including first, business, premium economy, and economy. JAL has won numerous awards for its service, including being named the World's Best Economy Class and Best Economy Class Airline Seat by Skytrax in 2019. The airline is committed to sustainability and has implemented various initiatives to reduce its environmental impact.

Korean Air is the largest airline and flag carrier of South Korea, headquartered in Seoul. It operates a vast network of domestic and international flights to over 125 destinations in 43 countries. The airline is a founding member of the SkyTeam alliance and has codeshare agreements with several other airlines. Korean Air offers a range of cabin classes, including First Class, Prestige Class (Business Class), and Economy Class, and provides various in-flight services such as entertainment, dining, and duty-free shopping. The airline has won numerous awards for its service quality, safety, and sustainability initiatives.

Skymark Airlines is a low-cost Japanese airline based in Tokyo. It was founded in 1996 and operates domestic flights within Japan. Skymark Airlines has a fleet of Airbus A330 and Boeing 737 aircraft and serves destinations such as Sapporo, Fukuoka, Okinawa, and Kagoshima. The airline offers a range of fare options, including basic economy and premium economy, and has a frequent flyer program called Skymark Smile Club. Skymark Airlines has faced financial difficulties in the past, including bankruptcy in 2015, but has since restructured and continues to operate as a budget carrier in Japan.