Cheapest return flights from Washington to Santiago in December from 423€

AirHint found the following cheapest return flights from Washington (IAD) to Santiago (SCL) in December 2025 (see full year).

Return flights

04 Dec - 11 Dec LATAM Airlines Group
04 Dec - 13 Dec LATAM Airlines Group
08 Dec - 11 Dec LATAM Airlines Group
05 Dec - 21 Dec LATAM Airlines Group
12 Dec - 16 Jan Avianca
12 Dec - 19 Dec Avianca
16 Dec - 11 Jan Avianca
29 Dec - 01 Jan LATAM Airlines Group
20 Dec - 10 Jan Frontier Airlines
23 Dec - 04 Jan Frontier Airlines
27 Dec - 03 Jan Frontier Airlines
18 Dec - 03 Jan Frontier Airlines
11 Dec - 03 Jan Copa

Also check the deals for one-way flights from Washington to Santiago in December.

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