Cheapest return flights from Chicago to Porto in March from 482€

Best time to book flights for Chicago (ORD) to Porto (OPO) flights at AirHint

AirHint found the following cheapest return flights from Chicago (ORD) to Porto (OPO) in March 2025 (see full year).

Return flights

26 Mar - 03 Apr Air Canada
24 Mar - 01 Apr Air Canada
04 Mar - 11 Mar SWISS
25 Mar - 02 Apr Air Canada
23 Mar - 31 Mar Air Canada
27 Mar - 04 Apr United
29 Mar - 06 Apr Air Canada
28 Mar - 05 Apr United
07 Mar - 16 Mar Spirit Airlines
13 Mar - 21 Mar SWISS
16 Mar - 22 Mar Turkish Airlines
20 Mar - 27 Mar Spirit Airlines
21 Mar - 29 Mar Spirit Airlines

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

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Porto

Cheap car rent in Porto