Cheap Flights Porto to San Francisco (OPO-SFO)

If you're travelling from Porto Airport to SFO, round-trip journeys start from . This price is based on airfares available within the last 7 days on Expedia for flights departing within the next year, so don't delay. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply.

This varies between air carriers, as each has its own set of terms and conditions. Head to the Customer Service Portal, where you'll find simple instructions on how to cancel online.

Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Porto Airport to San Francisco Intl. Airport (SFO) flights, you'll see a "no change fees" filter for you to select.

Averaging 14 hours and 37 minutes, the flight from Porto Airport to San Francisco Airport is a long one. To make your in-flight experience more relaxing, bring a quality travel pillow and a pair of noise-cancelling earplugs.

You'll have 9 000 kilometres to cover on the long-haul Maia to San Francisco route. Wear layers of comfy clothes and consider taking a pair of noise-cancelling earphones.

Unfortunately, there are no airlines that directly fly between Dr. Francisco de Sa Carneiro Airport (OPO) and San Francisco Airport. You'll need to book a flight with one or more stops.

Last-minute planners can sometimes nab a bargain, with some of the cheapest airfares from OPO to San Francisco Intl. Airport (SFO) emerging a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continuously — as early as 12 months in advance in some cases. It depends on the carrier though, as not all airlines advertise prices so far in advance.