Cheapest return flights from Boston to Porto in May from $472

Best time to book flights for Boston (BOS) to Porto (OPO) flights at AirHint

AirHint found the following cheapest return flights from Boston (BOS) to Porto (OPO) in May 2025 (see full year).

Return flights

28 May - 04 Jun Iberia
29 May - 05 Jun Iberia
30 May - 06 Jun Iberia
18 May - 24 May KLM
14 May - 20 May Fly Play
25 May - 31 May British Airways
31 May - 07 Jun Iberia
16 May - 23 May Lufthansa
19 May - 02 Jun Iberia
29 May - 02 Jun British Airways
24 May - 02 Jun British Airways
22 May - 29 May SWISS
23 May - 15 Jun SWISS
28 May - 01 Jun Icelandair
23 May - 26 May SWISS
23 May - 01 Jun Lufthansa
18 May - 24 May TAP direct
14 May - 21 May TAP direct

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

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.

Book a cheap hotel in Porto

Cheap car rent in Porto