AirHint found the following cheapest return flights from Houston (HOU) to Porto (OPO) in April 2026 (see full year).
Return flights
| 28 Apr - 05 May | British Airways | ||
| 27 Apr - 04 May | Air France | ||
| 19 Apr - 26 Apr | KLM | ||
| 30 Apr - 07 May | British Airways | ||
| 25 Apr - 09 May | British Airways | ||
| 24 Apr - 08 May | United | ||
| 24 Apr - 09 May | Spirit Airlines |
Also check the deals for one-way flights from Houston to Porto in April.
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