The current Kia Optima covers up to 1,296 km on a full tank, based on combined-cycle consumption. Figures below are the best-range variant in each generation.
| Years | Powertrain | Range |
|---|---|---|
| 2012–2015 | Combustion | 1,275 |
| 2015–2018 | Electric | 54 |
| 2018–2020 | Combustion | 1,296 |
Range is the manufacturer-rated maximum for the longest-range variant in each generation. Electric generations use the rated battery range; combustion generations are calculated from tank capacity and combined-cycle consumption. Figures outside a plausible range are excluded rather than shown with a guessed correction.