Cheapest return flights from Chicago to Buenos Aires in March from $799

AirHint found the following cheapest return flights from Chicago (ORD) to Buenos Aires (EZE) in March 2026 (see full year).

Return flights

08 Mar - 16 Mar Frontier Airlines
19 Mar - 17 Apr Frontier Airlines
08 Mar - 15 Mar Frontier Airlines
22 Mar - 26 Mar Copa
26 Mar - 30 Mar Spirit Airlines
14 Mar - 18 Mar Spirit Airlines
09 Mar - 16 Mar Copa
23 Mar - 01 Apr Copa
27 Mar - 05 Apr Spirit Airlines
28 Mar - 06 Apr Copa
19 Mar - 29 Mar Copa
28 Mar - 05 Apr United

Also check the deals for one-way flights from Chicago to Buenos Aires in March.

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