Cheapest return flights from Chicago to Porto in July from $603

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 July 2025 (see full year).

Return flights

07 Jul - 16 Jul Air Canada
09 Jul - 16 Jul United
15 Jul - 22 Jul United
16 Jul - 23 Jul United
22 Jul - 29 Jul United
23 Jul - 30 Jul United
29 Jul - 05 Aug United
07 Jul - 14 Jul Air Canada
14 Jul - 21 Jul Lufthansa
02 Jul - 09 Jul Delta
10 Jul - 17 Jul United
28 Jul - 04 Aug United
31 Jul - 07 Aug Iberia
30 Jul - 06 Aug United
25 Jul - 01 Aug British Airways
27 Jul - 03 Aug Iberia
26 Jul - 02 Aug TAP

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

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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