AP STYLE: Farther, Further
Farther references physical distance:
They traveled farther up the Amazon River.
Further references an extension of time or degree:
They investigated the matter further.
Are you writing about summer travel?
— APStylebook (@APStylebook) August 2, 2023
Farther refers to physical distance: Travelers are driving farther for their vacations.
Further refers to an extension of time or degree: She will look further into airline policies. pic.twitter.com/Zf5uCBlNzu
SCW 8.6.23
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