In an article that looks at primes and zooms, one of their top choices for travelers using the Sony α6300 Mirrorlessons suggests the Sony E PZ 18-105mm f/4 G OSS.  

They write, "[T]he optical quality is very good through the aperture range and across the focal lengths, making it useful for a wide variety of applications. Thanks to its built-in optical stabilisation that works for stills and video, you can easily use the non-stabilised α6300 at slow shutter speeds. The lens also features a constant f/4 aperture which, although not extremely bright, is better than the maximum aperture of f/5.6 or f/6.3 many zooms offer. Finally, it comes with an electronic zoom switch on the side of the barrel, allowing for seamless zooms in video mode." -BestMirrorlessBlogs

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