Cheapest return flights from Boston to Santiago in May from $359

AirHint found the following cheapest return flights from Boston (BOS) to Santiago (STI) in May 2026 (see full year).

Return flights

20 May - 24 May Spirit Airlines
22 May - 24 May jetBlue direct
22 May - 25 May jetBlue direct
21 May - 24 May jetBlue direct
14 May - 18 May jetBlue direct
15 May - 19 May Spirit Airlines
20 May - 23 May Spirit Airlines
14 May - 19 May Spirit Airlines
20 May - 05 Jun Spirit Airlines
20 May - 24 May jetBlue direct
15 May - 18 May Spirit Airlines
21 May - 05 Jun Spirit Airlines
22 May - 05 Jun Spirit Airlines

Also check the deals for one-way flights from Boston to Santiago in May.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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