AirHint found the following cheapest return flights from Chicago (MDW) to Buenos Aires (AEP) in March 2026 (see full year).
Return flights
| 19 Mar - 13 Apr | Porter Airlines (Canada) Ltd | ||
| 12 Mar - 16 Mar | Frontier Airlines | ||
| 20 Mar - 30 Mar | Porter Airlines (Canada) Ltd | ||
| 10 Mar - 21 Mar | Frontier Airlines |
Also check the deals for one-way flights from Chicago to Buenos Aires in March.
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