AirHint found the following cheapest return flights from Seattle (SEA) to Buenos Aires (EZE) in November 2025 (see full year).

Return flights

03 Nov - 25 Nov	Alaska Airlines
14 Nov - 03 Dec	Hawaiian Airlines
11 Nov - 25 Nov	Alaska Airlines
06 Nov - 17 Nov	LATAM Airlines Group
01 Nov - 27 Nov	LATAM Airlines Group
07 Nov - 18 Nov	LATAM Airlines Group
05 Nov - 16 Nov	Delta
29 Nov - 06 Dec	Hawaiian Airlines

Also check the deals for one-way flights from Seattle to Buenos Aires in November.

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 Seattle to Buenos Aires in November from 868€

Return flights