Question : What is the cheapest round-trip ticket you can get to Porto?
Answer : SWISS is offering the best deal at $321. Better snatch it up quickly because prices range up to $364 over the next three months.
Question : How much should a trip from London (LCY) to Porto (OPO) cost?
Answer : Flight prices fluctuate a lot less than most routes from the United Kingdom for LCY to OPO. They range from $321 to $364. The further out you book a route, the more likely you are to save.
Question : Is there an alternative to London City Airport (LCY) for getting you to Porto?
Answer : Lucky for you, there is another airport near London. London Heathrow Airport (LHR) is 22 miles away, and over the next two months, flights are being priced 34% cheaper than flights from London City Airport.