AirHint found the following cheapest return flights from Washington (IAD) to Buenos Aires (EZE) in January 2026 (see full year).
Return flights
| 05 Jan - 21 Jan | United | ||
| 23 Jan - 06 Feb | United | ||
| 09 Jan - 24 Jan | Copa | ||
| 15 Jan - 25 Jan | Delta | ||
| 29 Jan - 06 Feb | United | ||
| 29 Jan - 15 Feb | Copa | ||
| 05 Jan - 09 Jan | Avianca |
Also check the deals for one-way flights from Washington to Buenos Aires in January.
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