Porto (OPO) to Chicago (ORD) flight deal in economy from $628

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
Round Trip•Economy
PortugalOPO

Francisco Sá Carneiro Airport

Porto, Portugal
United StatesORD

O'Hare International Airport

Chicago, United States
$844 USD
-26%$628 USD
Verified about 15 hours ago
Fair Availability
33% of dates checked are available within 10% of the lowest price

Friday, September 18th, 2026

6 round-trip options

Returning
Sat, Sep 26, 2026•8 Day Trip
$731 USD
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Returning
Sun, Sep 27, 2026•9 Day Trip
$887 USD
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Returning
Mon, Sep 28, 2026•10 Day Trip
$780 USD
Google Flights
Returning
Wed, Sep 30, 2026•12 Day Trip
$779 USD
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Returning
Thu, Oct 1, 2026•13 Day Trip
$684 USD
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Returning
Fri, Oct 2, 2026•14 Day Trip
$720 USD
Google Flights