$643 Cheap United flights Detroit (DTW) to Porto (OPO)

View $643 flight on Thu, Jul 31, 2025Opens in a new window

$643 Cheap United flights Detroit (DTW) to Porto (OPO)

Prices were available within the past 7 days and start at $643 for one-way flights and $942 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
United
Mon, Jul 28 - Wed, Aug 6
DTW
Detroit
OPO
Porto
$942
Roundtrip
Found 3 days ago
Select United flight, departing Mon, Jul 28 from Detroit to Porto, returning Wed, Aug 6, priced at $942 Found 3 days ago
United
Wed, Jul 30 - Tue, Aug 12
DTW
Detroit
OPO
Porto
$1,052
Roundtrip
Found 3 days ago
Select United flight, departing Wed, Jul 30 from Detroit to Porto, returning Tue, Aug 12, priced at $1,052 Found 3 days ago
United
Sat, Aug 2 - Tue, Aug 12
DTW
Detroit
OPO
Porto
$1,127
Roundtrip
Found 3 days ago
Select United flight, departing Sat, Aug 2 from Detroit to Porto, returning Tue, Aug 12, priced at $1,127 Found 3 days ago
United
Wed, Jul 30 - Wed, Aug 6
DTW
Detroit
OPO
Porto
$1,142
Roundtrip
Found 3 days ago
Select United flight, departing Wed, Jul 30 from Detroit to Porto, returning Wed, Aug 6, priced at $1,142 Found 3 days ago
United
Wed, Jul 30 - Fri, Aug 8
DTW
Detroit
OPO
Porto
$1,149
Roundtrip
Found 3 days ago
Select United flight, departing Wed, Jul 30 from Detroit to Porto, returning Fri, Aug 8, priced at $1,149 Found 3 days ago
United
Wed, Jul 30 - Sun, Aug 10
DTW
Detroit
OPO
Porto
$1,219
Roundtrip
Found 3 days ago
Select United flight, departing Wed, Jul 30 from Detroit to Porto, returning Sun, Aug 10, priced at $1,219 Found 3 days ago
Flights from Detroit (DTW) to Porto (OPO)
Origin airport
Detroit Metropolitan Wayne County
Destination airport
Dr. Francisco de Sa Carneiro
Distance
5951 km