Cheapest one-way flights from Boston to Buenos Aires in December from 259€

AirHint found the following cheapest one-way flights from Boston (BOS) to Buenos Aires (AEP) in December 2025 (see full year).

One-Way flights

05 Dec Frontier Airlines
08 Dec Spirit Airlines
09 Dec Avianca
04 Dec Frontier Airlines
14 Dec Frontier Airlines
11 Dec Avianca
16 Dec Spirit Airlines
19 Dec Spirit Airlines
02 Dec LATAM Airlines Group
10 Dec LATAM Airlines Group

Also check the deals for return flights from Boston to Buenos Aires in December.

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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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