Cheapest one-way flights from Washington to Buenos Aires in March from $261

AirHint found the following cheapest one-way flights from Washington (IAD) to Buenos Aires (EZE) in March 2026 (see full year).

One-Way flights

03 Mar United
18 Mar Copa
31 Mar Copa
17 Mar Copa
22 Mar Copa
23 Mar Copa
16 Mar Copa
08 Mar United
15 Mar United
21 Mar Delta

Also check the deals for return flights from Washington to Buenos Aires in March.

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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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