She is scheduled to go on a business trip to London next week.
Literal
She [topic-は] next-week London [toward-へ] business-trip do schedule is.
出張する予定だ — 出張 (しゅっちょう, 'business trip') is combined with the schedule pattern ~予定だ ('is scheduled to'). ロンドンへ uses へ for direction. A standard business-context sentence.