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Cheap flights from Chicago (CHI) to Porto (OPO)

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from Chicago (CHI) to Porto (OPO)

How to find the cheapest flight from Chicago (CHI) to Porto (OPO)
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How to find the cheapest flight from Chicago (CHI) to Porto (OPO)
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How to find the cheapest flight from Chicago (CHI) to Porto (OPO)
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Cheap flights from Chicago to Porto in July , August 2026

29 Jul - 12 Aug $ 1,189.00
CHI
Chicago
Swiss International Air Lines
1 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
1 STOPS
CHI
Chicago
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29 Jul - 06 Aug $ 1,562.00
CHI
Chicago
TAP Portugal
1 STOPS
OPO
Porto
OPO
Porto
TAP Portugal
1 STOPS
CHI
Chicago
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30 Jul - 06 Aug $ 2,546.00
CHI
Chicago
TAP Portugal
1 STOPS
OPO
Porto
OPO
Porto
TAP Portugal
1 STOPS
CHI
Chicago
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Last minute flights from Chicago to Porto

27 Jul - 31 Jul $ 1,529.00
CHI
Chicago
Swiss International Air Lines
1 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
1 STOPS
CHI
Chicago
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29 Jul - 31 Jul $ 1,682.00
CHI
Chicago
Swiss International Air Lines
1 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
1 STOPS
CHI
Chicago
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29 Jul - 31 Jul $ 2,189.00
CHI
Chicago
TAP Portugal
1 STOPS
OPO
Porto
OPO
Porto
TAP Portugal
1 STOPS
CHI
Chicago
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One-way flights to Porto from Chicago

4:40 PM - 9:00 AM
TAP Portugal
1 Stops
11h 30m
CHI - OPO
$ 548
Kiwi
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4:40 PM - 4:00 PM
TAP Portugal
1 Stops
18h 20m
CHI - OPO
$ 549
Kiwi
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2:25 PM - 6:50 PM
United Airlines
1 Stops
10h 30m
CHI - OPO
$ 730
Kiwi
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How to find the cheapest flight from Chicago (CHI) to Porto (OPO)

Related info for your journey
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How to find the cheapest flight from Chicago (CHI) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.