AirHint found the following cheapest return flights from San Francisco (SFO) to Quito (UIO) in December 2025 (see full year).

Return flights

19 Dec - 31 Dec	Copa
04 Dec - 18 Dec	United
12 Dec - 31 Dec	Hawaiian Airlines
17 Dec - 31 Dec	Hawaiian Airlines
18 Dec - 31 Dec	Hawaiian Airlines
19 Dec - 01 Jan	Avianca
18 Dec - 05 Jan	Avianca
23 Dec - 04 Jan	Avianca
22 Dec - 04 Jan	Avianca
21 Dec - 04 Jan	Avianca
19 Dec - 08 Jan	Avianca
19 Dec - 02 Jan	Avianca
18 Dec - 04 Jan	Hawaiian Airlines
19 Dec - 05 Jan	Aeromexico

Also check the deals for one-way flights from San Francisco to Quito in December.

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 San Francisco to Quito in December from 597€

Return flights