[3][4] Flynn made his international debut for the United States at the 2022 World Rowing Championships in the PR3 Mixed coxed four event.

[5] On July 12, 2023, he was selected to represent the United States at the 2023 World Rowing Championships.

[6] He won a silver medal in the PR3 Mixed coxed four event with a time of 7:25.01.

[7] On July 2, 2024, he was selected to represent the United States at the 2024 Summer Paralympics.

[8][9] He won a silver medal in the mixed coxed four event.