User: What's the shortest way to travel, between Seattle, and Walla Walla Washington? Flying, boat, or car? Please answer in 100 words or less.
Assistant: The shortest likely route between Seattle, Washington and Walla Walla, Washington is by air, as the driving distance of approximately 480 miles is too far to be practical by car.  There are no scheduled ferry services between these two locations, however, the water distance can be reduced by some 75 miles by taking a ferry to/from Vancouver, British Columbia in Canada, and then driving down the I-5 interstate highway.   Using a commercial flight is the fastest way to travel between these two locations, with flights taking approximately one and a half hours on average.