Born in Espoo, Peltola started playing football in Belgium, where his family lived for a couple of years due to father's work. After returning to Finland, Peltola joined Keimolan Kaiku youth team in Vantaa.[3]
On 21 August 2020, Peltola signed a professional contract with the club, on a two-year deal with an option for an additional year.[5]
On 23 August 2022, HJK announced that they had exercised their option to keep Peltola in Helsinki for the 2023 season.[6][7] He scored his first goal in the league on 9 May 2023 in away game against KTP.[8]
D.C. United
On February 2, 2024, Peltola signed with Major League Soccer (MLS) franchise D.C. United on a four-year contract, with the option to extend,[9] as a Young Designated Player. D.C. United had earlier acquired Peltola’s MLS Discovery Priority rights from Minnesota United for $75,000.[10] He debuted in MLS with his new team on 25 February 2024 in the 2024 season opening game, after being named in the starting line-up in a 3–1 home win against an old rival franchise New England Revolution.[11][12]
International career
Peltola represented Finland at various youth national teams, from under-16 to under-21 levels.