Cheapest return flights from Houston to Porto in May from 492€

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

Return flights

11 May - 19 May Air France
13 May - 19 May Air France
10 May - 19 May KLM
07 May - 12 May British Airways
07 May - 13 May British Airways
07 May - 18 May British Airways
07 May - 19 May British Airways
09 May - 19 May British Airways
07 May - 17 May British Airways
10 May - 17 May British Airways
26 May - 03 Jun Spirit Airlines
25 May - 02 Jun British Airways
30 May - 07 Jun Spirit Airlines
28 May - 04 Jun Spirit Airlines
27 May - 04 Jun Spirit Airlines
28 May - 05 Jun Spirit Airlines
31 May - 08 Jun Air Canada
29 May - 06 Jun Spirit Airlines

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.