Cheapest return flights from Chicago to Porto in March from $516

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

Return flights

11 Mar - 15 Mar Spirit Airlines
10 Mar - 17 Mar Air Canada
24 Mar - 01 Apr Lufthansa
29 Mar - 07 Apr Air Canada
28 Mar - 07 Apr Turkish Airlines
31 Mar - 08 Apr Turkish Airlines
21 Mar - 29 Mar Spirit Airlines
20 Mar - 27 Mar Spirit Airlines

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

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