AirHint found the following cheapest return flights from Chicago (ORD) to Buenos Aires (EZE) in March 2026 (see full year).
Return flights
| 05 Mar - 14 Mar | Frontier Airlines | ||
| 21 Mar - 28 Mar | Air Canada | ||
| 20 Mar - 25 Mar | Air Canada | ||
| 19 Mar - 17 Apr | Air Canada | ||
| 02 Mar - 26 Mar | American Airlines |
Also check the deals for one-way flights from Chicago to Buenos Aires in March.
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