To convert miles per hour to kilometers per hour, you can use the conversion factor that 1 mile is approximately equal to 1.60934 kilometers.
So, to convert 17 miles per hour to kilometers per hour:
\[ 17 \text{ miles/hour} \times 1.60934 \text{ km/mile} \approx 27.35978 \text{ km/hour} \]
Rounding it to two decimal places, Delta drives at an average speed of approximately 27.36 kilometers per hour.