AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Porto (OPO) in August 2025 (see full year).
Return flights
| 13 Aug - 21 Aug | Air Canada | ||
| 13 Aug - 20 Aug | Lufthansa | ||
| 16 Aug - 23 Aug | Frontier Airlines |
Also check the deals for one-way flights from Raleigh-durham to Porto in August.
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.
Find us on social media