AirHint found the following cheapest return flights from Boston (BOS) to Praia, Santiago Island (RAI) in August 2025 (see full year).

Return flights

29 Aug - 12 Sep	Azores Airlines
17 Aug - 26 Aug	TAP
04 Aug - 11 Aug	TAP
01 Aug - 04 Aug	TAP
12 Aug - 15 Aug	TAP
08 Aug - 11 Aug	TAP
07 Aug - 11 Aug	TAP
07 Aug - 12 Aug	TAP
10 Aug - 14 Aug	TAP
07 Aug - 10 Aug	TAP
06 Aug - 11 Aug	TAP

Also check the deals for one-way flights from Boston to Praia, Santiago Island in August.

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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Cheapest return flights from Boston to Praia, Santiago Island in August from 662€

Return flights