AirHint found the following cheapest return flights from Washington (IAD) to Buenos Aires (EZE) in March 2026 (see full year).
Return flights
| 16 Mar - 20 Mar | Avianca | ||
| 04 Mar - 16 Mar | Delta | ||
| 08 Mar - 22 Mar | Delta | ||
| 05 Mar - 16 Mar | American Airlines | ||
| 06 Mar - 15 Mar | Avianca |
Also check the deals for one-way flights from Washington to Buenos Aires in March.
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