- Plan, book, fly with confidence
- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 30% on select hotels after you book a flight*
Cheap Flights from San Francisco to Porto (SFO-OPO)
Prices were available within the past 7 days and start at $452 for one-way flights and $599 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Frequently asked questions
Travel information
Travel information
Origin airport | San Francisco Intl. |
Destination airport | Dr. Francisco de Sa Carneiro |
Airlines serving | Air Canada, Air Europa, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, ITA Airways, Iberia, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United |
Roundtrip price | $599 |
Distance | 5570 mi |
Book with confidence
Book with confidence
The cheapest times to fly from San Francisco to Porto
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to Porto are during the month of October. You can find some of the cheapest flights from San Francisco to Porto with Expedia's search tool and vast selection of airlines.
The best time to book a flight from San Francisco to Porto
Sunday is one of the best days to book for cheap flights from San Francisco to Porto: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from San Francisco to Porto
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to Porto in 2025. You can also book with separate airlines for your outbound and return journeys, from $452 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to Porto flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to Porto airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
Be inspired and discover more with Expedia
Be inspired and discover more with Expedia
Flights
- EVA Airways San Francisco (SFO) to Bangkok (BKK) flights
- Alaska Airlines San Francisco (SFO) to Puerto Vallarta (PVR) flights
- Asiana Airlines San Francisco (SFO) to Manila (MNL) flights
- Alaska Airlines San Francisco (SFO) to New York (JFK) flights
- Air India San Francisco (SFO) to Delhi (DEL) flights
- Alaska Airlines San Francisco (SFO) to Los Angeles (LAX) flights
- Alaska Airlines San Francisco (SFO) to San Diego (SAN) flights
- Aeromexico San Francisco (SFO) to Mexico City (MEX) flights
- TAP Portugal Newark Liberty Intl. Airport (EWR) to Porto (OPO) flights
- Air Europa Madrid (MAD) to Porto (OPO) flights
- Alaska Airlines San Francisco (SFO) to Newark Liberty Intl. Airport (EWR) flights
- Alaska Airlines San Francisco (SFO) to Honolulu (HNL) flights
- Alaska Airlines
- Air Canada
- Asiana Airlines
- Delta
- Cathay Pacific
- JetBlue Airways
- American Airlines
- All Nippon Airways
- Turkish Airlines
- EVA Airways
- Japan Airlines
- Korean Air
- British Airways
- United
- Frontier Airlines
- Lufthansa
- Flights to Lagoa
- Flights to Portimão
- Flights to Tavira
- Flights to Santa Cruz
- Flights to Faro
- Flights to Calheta
- Flights to Lisbon District
- Flights to Braga
- Flights to Vila Nova de Gaia
- Flights to Évora
- Flights to Obidos
- Flights to Coimbra
- Flights to Albufeira
- Flights to Olhao
- Flights to Porto
- Flights to Ponta Delgada
- Flights to Lagos
- Flights to Loulé
- Flights to Aveiro
- Flights to Nazaré
- Flights from Los Angeles (LAX) to Bangkok (BKK)
- Flights from San Francisco (SFO) to Bangkok (BKK)
- Flights from Los Angeles (LAX) to Chicago (ORD)
- Flights from San Francisco (SFO) to Puerto Vallarta (PVR)
- Flights from Los Angeles (LAX) to Paris (CDG)
- Flights from Los Angeles (LAX) to Cancun (CUN)
- Flights from Los Angeles (LAX) to Miami (MIA)
- Flights from Los Angeles (LAX) to Seoul (ICN)
- Flights from San Francisco (SFO) to Mumbai (BOM)
- Flights from San Francisco (SFO) to Manila (MNL)
- Flights from Los Angeles (LAX) to Manila (MNL)
- Flights from Los Angeles (LAX) to New York (NYC)
- Flights from Los Angeles (LAX) to Seattle (SEA)
- Flights from San Francisco (SFO) to New York (JFK)
- Flights from Los Angeles (LAX) to London (LHR)
- Flights from Los Angeles (LAX) to Dallas (DFW)
- Flights from San Francisco (SFO) to Delhi (DEL)
- Flights from Chicago (ORD) to Los Angeles (LAX)
- Flights from Houston (IAH) to Los Angeles (LAX)
- Flights from Atlanta (ATL) to Los Angeles (LAX)
- Flights from Portland (PDX) to Los Angeles (LAX)
- Flights from New York (NYC) to Los Angeles (LAX)
- Flights from San Francisco (SFO) to Los Angeles (LAX)
- Flights from Dallas (DFW) to Los Angeles (LAX)
- Flights from Seattle (SEA) to Los Angeles (LAX)
- Flights from Las Vegas (LAS) to Los Angeles (LAX)
- Flights from San Francisco (SFO) to San Diego (SAN)
- Flights from Los Angeles (LAX) to San Francisco (SFO)
- Flights from San Francisco (SFO) to Mexico City (MEX)
- Flights from Los Angeles (LAX) to Mexico City (MEX)
- Flights from Newark Liberty Intl. Airport (EWR) to Porto (OPO)
- Flights from Minneapolis (MSP) to Porto (OPO)
- Flights from Milan (MXP) to Porto (OPO)
- Flights from Chicago (ORD) to Porto (OPO)
- Flights from Boston (BOS) to Porto (OPO)
- Flights from Washington (IAD) to Porto (OPO)
- Flights from Miami (MIA) to Porto (OPO)
- Flights from Washington (DCA) to Porto (OPO)
- Flights from Fort Lauderdale (FLL) to Porto (OPO)
- Flights from Los Angeles (LAX) to Porto (OPO)
- Flights from New York (LGA) to Porto (OPO)
- Flights from New York (JFK) to Porto (OPO)
- Flights from San Diego (SAN) to Las Vegas (LAS)
- Flights from Los Angeles (LAX) to Las Vegas (LAS)
- Flights from San Francisco (SFO) to Las Vegas (LAS)
- Flights from Los Angeles (LAX) to Tokyo (NRT)
- Flights from San Francisco (SFO) to Tokyo (NRT)
- Flights from San Francisco (SFO) to Hong Kong (HKG)
- Flights from San Francisco (SFO) to Newark Liberty Intl. Airport (EWR)
- Flights from Los Angeles (LAX) to Honolulu (HNL)
- Flights from San Francisco (SFO) to Honolulu (HNL)
- Flights from Buchanan Field
- Flights from Modesto City - County
- Flights from Stockton Municipal
- Flights from Monterey Peninsula
- Flights from Oakland Intl.
- Flights from Salinas Municipal
- Flights from Norman Y. Mineta San Jose Intl.
- Flights from San Carlos
- Flights from Watsonville Municipal
- Flights from Sonoma County