| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2026 | KR Reykjavik | Icelandic Cup | 1 | 0 | 0 | 1 | 0 | – |
| 2025 | Valur | Icelandic Cup | 3 | 0 | 0 | 0 | 0 | – |
| 2025 | Valur | League Cup | 7 | 1 | 0 | 1 | 0 | – |
| 2025 | Valur | Reykjavik Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2024 | Fylkir | Icelandic Cup | 3 | 0 | 0 | 1 | 0 | – |
| 2024 | Valur | League Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2024 | Valur | Reykjavik Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2023 | Valur | Icelandic Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2023 | Valur | League Cup | 6 | 0 | 0 | 0 | 0 | – |
| 2023 | Valur | Reykjavik Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2022 | Valur | Icelandic Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2022 | Valur | League Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2022 | Valur | Reykjavik Cup | 3 | 1 | 0 | 0 | 0 | – |
| 2021 | Fylkir | Icelandic Cup | 2 | 1 | 0 | 0 | 0 | – |
| 2021 | Fylkir | League Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2021 | Fylkir | Reykjavik Cup | 2 | 1 | 0 | 0 | 0 | – |
| Total | 45 | 4 | 0 | 3 | 0 | – | ||
| Fecha | Desde | Hacia | Tipo | |
|---|---|---|---|---|
| 08 may 2025 | Valur | KR Reykjavik | Free agent | |
| - | Fylkir | Valur | Return from loan | |
| 04 may 2024 | Valur | Fylkir | Loan | |
| 01 jul 2022 | Fylkir | Valur | Transfer | |
| - | Heerenveen | Fylkir | Transfer | |
| - | Fylkir | Heerenveen | Transfer |
O. Kjartansson career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.