Cheapest return flights from Boston to Santiago in January from $260

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

Return flights

29 Jan - 30 Jan Spirit Airlines
25 Jan - 30 Jan Spirit Airlines
29 Jan - 11 Feb Spirit Airlines
29 Jan - 07 Feb Spirit Airlines
29 Jan - 03 Feb Spirit Airlines
25 Jan - 11 Feb Spirit Airlines
25 Jan - 07 Feb Spirit Airlines
25 Jan - 03 Feb Spirit Airlines
30 Jan - 11 Feb Spirit Airlines
30 Jan - 07 Feb Spirit Airlines
30 Jan - 03 Feb Spirit Airlines
22 Jan - 30 Jan Spirit Airlines
19 Jan - 30 Jan Spirit Airlines
22 Jan - 11 Feb Spirit Airlines
23 Jan - 30 Jan Spirit Airlines
22 Jan - 23 Jan Spirit Airlines
19 Jan - 23 Jan Spirit Airlines
22 Jan - 24 Jan Spirit Airlines
19 Jan - 24 Jan Spirit Airlines
23 Jan - 24 Jan Spirit Airlines

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

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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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