Yes - any 42mm Apple Watch band will fit your Apple Watch.
Non-Sport bands have different lengths, so check your wrist circumference and refer to the Apple Watch Sizing Guide (which compares all Apple bands) before buying separate bands:www.apple.com/shop/watch/si...
Trying them on at an Apple Retail Store is also a great option.
The Apple Watch Sport also has an anodized aluminum case, whereas non-Sport bands have different metals in their adapters and/or links (this does not affect compatibility, only appearance).
Information about how to change bands over: Change your Apple Watch band - Apple Support