。
She traveled from Boston to San Francisco via Chicago.
Literal
She [topic-は] Boston [from-から] Chicago [via-経由で] San-Francisco [to-へ] traveled.
This sentence chains three location particles in sequence: から (origin), 経由で (waypoint, 'by way of'), and へ (destination). 経由 is a Sino-Japanese noun ('via, by way of') and pairs with で in a fixed adverbial frame; the で here marks instrument/means rather than location. Three katakana place names in a row is a compact tour of how Japanese handles foreign geography — phonetic transcription, no kanji needed. ボストン, シカゴ, and サンフランシスコ all entered Japanese in the modern era through American contact.