Cheapest return flights from Chicago to Porto in May from $598
AirHint found the following cheapest return flights from Chicago (ORD) to Porto (OPO) in May 2025 (see full year).
Return flights
| 07 May - 18 May | Turkish Airlines | ||
| 02 May - 09 May | TAP | ||
| 01 May - 10 May | Turkish Airlines | ||
| 09 May - 18 May | Turkish Airlines | ||
| 14 May - 04 Jun | American Airlines | ||
| 19 May - 24 May | Spirit Airlines |
Also check the deals for one-way flights from Chicago to Porto in May.
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.
