Cheapest return flights from Houston to Porto in July from $1147

Best time to book flights for Houston (IAH) to Porto (OPO) flights at AirHint

AirHint found the following cheapest return flights from Houston (IAH) to Porto (OPO) in July 2025 (see full year).

Return flights

22 Jul - 29 Jul Lufthansa
21 Jul - 28 Jul Lufthansa
03 Jul - 10 Jul Lufthansa
01 Jul - 08 Jul United
02 Jul - 09 Jul Lufthansa
23 Jul - 30 Jul United
28 Jul - 04 Aug Lufthansa
20 Jul - 27 Jul Lufthansa
19 Jul - 26 Jul Lufthansa
24 Jul - 31 Jul United
25 Jul - 01 Aug United
27 Jul - 03 Aug Lufthansa
26 Jul - 02 Aug United

Also check the deals for one-way flights from Houston 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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