Cheapest one-way BWI–OPO flights, May

AirHint found the following cheapest one-way flights from Baltimore (BWI) to Porto (OPO) in May 2026 (see full year).

One-Way flights

27 May Frontier Airlines
09 May British Airways
10 May British Airways
11 May British Airways

Also check the deals for return flights from Baltimore to Porto in May.

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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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