Cheapest return flights from Houston to Porto in May from $599

AirHint found the following cheapest return flights from Houston (HOU) to Porto (OPO) in May 2026 (see full year).

Return flights

04 May - 21 May KLM
01 May - 21 May Air France
04 May - 09 May Delta
06 May - 24 May KLM
06 May - 27 May Spirit Airlines
16 May - 23 May British Airways
18 May - 25 May British Airways
20 May - 27 May British Airways
17 May - 24 May British Airways
19 May - 26 May British Airways

Also check the deals for one-way flights from Houston to Porto in May.

Powered by

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.

Book a cheap hotel in Porto

Cheap car rent in Porto

Feel free to contact us with any feedback or request another flight research.