Cheapest return flights from Chicago to Porto in May from 580€

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 May 2025 (see full year).

Return flights

10 May - 17 May TAP
04 May - 11 May TAP
16 May - 23 May TAP
09 May - 16 May Scandinavian Airlines
11 May - 18 May TAP
15 May - 22 May SWISS
27 May - 03 Jun United
28 May - 04 Jun United
26 May - 02 Jun British Airways
22 May - 29 May United
23 May - 30 May United
24 May - 31 May United

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

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.

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