Are your friends coming to the airport to see you off?

Literal

Friends [topic-は] airport [to-へ] see-off-[purpose-に] come-[nominal-のですか]?

のですか is the full polite form of んですか — the explanatory question marker. 見送りに来る ('come to see off') pairs 見送り (seeing off, as a noun) with the purpose-に. The whole sentence is naturally flowing polite conversation.