Cheapest return flights from Detroit to Porto in July from $694

AirHint found the following cheapest return flights from Detroit (DTW) to Porto (OPO) in July 2026 (see full year).

Return flights

21 Jul - 28 Jul Delta
30 Jul - 06 Aug United
23 Jul - 30 Jul United
16 Jul - 23 Jul Delta
28 Jul - 04 Aug United
14 Jul - 21 Jul United
15 Jul - 22 Jul United
29 Jul - 05 Aug United
13 Jul - 20 Jul WestJet
22 Jul - 29 Jul Air France
31 Jul - 07 Aug Air France
10 Jul - 17 Jul WestJet
17 Jul - 24 Jul WestJet
11 Jul - 18 Jul United

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

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