AirHint found the following cheapest return flights from Washington (IAD) to Buenos Aires (EZE) in March 2026 (see full year).
Return flights
| 09 Mar - 15 Mar | Copa | ||
| 09 Mar - 13 Mar | Avianca | ||
| 20 Mar - 24 Mar | United | ||
| 12 Mar - 26 Mar | Copa | ||
| 01 Mar - 07 Mar | United | ||
| 27 Mar - 10 Apr | Avianca |
Also check the deals for one-way flights from Washington to Buenos Aires in March.
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