Board Thread:Questions and Answers/@comment-2054358-20130521231940/@comment-1038387-20130522144057

She doesn't always have a Javelin ready. And it's perfectly normal for her to have her own vehicle. And the standard explanation is that the jet's for long distance flights. She's not as fast a flyer as Supes or J'onn.

The true story is, in the Golden Age, Wonder Woman could not actually fly. So the plane was her main means of transportation.