“Frequent flyer miles (US preferred). Hand out a flier (US preferred).”
Spelling Entry 1058 / 1605 60-second read
Flier vs. Flyer
American versus British preference — both valid.
The comparisoni
“AP uses FLIER for person; FLYER for handbill. OED treats as interchangeable.”
The ruleii
¶
Both are standard.
FLIER is older and still preferred by AP and Chicago for a person who flies. FLYER is preferred for a handbill and is standard in British English. Most editors now accept either.
Memory aidiii
Remember it like this
Either works; pick one and stay consistent.