[2] Jeon made her Bristol City debut on 26 January 2020 in their Women's FA Cup fourth round victory against Durham.

[11] Due to fixture cancellations caused by bad weather, Jeon's FA WSL debut came on 12 February 2020 away at league leaders Manchester City.

[14] She made her starting XI debut on 7 October 2020 in Reading's 4–0 home win over Charlton in the FA Women's League Cup.

On 12 August 2007, she made her senior debut in a 2–1 victory against Vietnam, before returning to the under-19 team to play at the 2007 AFC U-19 Women's Championship, where South Korea finished fourth.

In 2009, she helped South Korea win gold at the 2009 Summer Universiade, finishing as the top scorer of the tournament with 10 goals.

The following year, she scored the game-winning goal against Australia in the 2010 Peace Queen Cup final and was named the tournament's MVP.

Jeon played all four of South Korea's matches at the 2015 FIFA Women's World Cup, scoring a goal in a 2–2 draw with Costa Rica on 13 June 2015.