Porto (OPO) → San Francisco (SFO)
About Porto to San Francisco Flights
Discover the best flights from Porto to San Francisco, covering 8,964 km in approximately 11h 42m. Porto (OPO) to San Francisco (SFO) is one of the major long-haul routes connecting Portugal and United States. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Porto to San Francisco.
12-Month Price History
Flight prices from Porto to San Francisco vary significantly throughout the year. February typically offers the best deals with average prices around $1614, while July sees the highest prices, averaging $2738. Savvy travelers can save up to 41% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
149 days
For best prices
Booking Tips
For the best prices on Porto to San Francisco flights, we recommend booking 77 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
Delta Air Lines DL | $2800 | $11470 | $16930 |
American Airlines AA | $2860 | $11290 | $15420 |
Alaska Airlines AS | $2940 | $9940 | $18060 |
British Airways BA | $2950 | $11430 | $19400 |
Portugália Airlines NI | $2950 | $10700 | $17630 |
TAP Air Portugal TP | $3050 | $11990 | $18750 |
United Airlines UA | $3230 | $10040 | $17710 |
Delta Air Lines
DL
Economy
$2800
Business
$11470
First
$16930
American Airlines
AA
Economy
$2860
Business
$11290
First
$15420
Alaska Airlines
AS
Economy
$2940
Business
$9940
First
$18060
British Airways
BA
Economy
$2950
Business
$11430
First
$19400
Portugália Airlines
NI
Economy
$2950
Business
$10700
First
$17630
TAP Air Portugal
TP
Economy
$3050
Business
$11990
First
$18750
United Airlines
UA
Economy
$3230
Business
$10040
First
$17710
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Porto → San Jose
Francisco Sá Carneiro (OPO) to San Jose International (SJC)
Distance: 8,956 km
Average price: $1876
Porto → Oakland
Francisco Sá Carneiro (OPO) to Oakland International (OAK)
Distance: 8,946 km
Average price: $1874
Porto → Sacramento
Francisco Sá Carneiro (OPO) to Sacramento International (SMF)
Distance: 8,830 km
Average price: $1852
Porto → San Jose
Francisco Sá Carneiro (OPO) to San Jose International (SJC)
Distance: 8,956 km
Average price: $1876
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Frequently Asked Questions
How long is the flight from Porto to San Francisco?
The flight time from Porto (OPO) to San Francisco (SFO) is approximately 11 hours and 42 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Porto and San Francisco?
The aerial distance between Porto and San Francisco is 8,964 kilometers (5,570 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Porto to San Francisco?
Several airlines operate flights between Porto and San Francisco, including United Airlines, Alaska Airlines, TAP Air Portugal and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Porto to San Francisco?
Based on historical data, February typically offers the lowest airfares for flights from Porto to San Francisco. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to San Francisco?
For the best prices on Porto to San Francisco flights, we recommend booking 155 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Porto to San Francisco?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of Portugal traveling to United States should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Porto and San Francisco?
Porto operates on Europe/Lisbon time zone, while San Francisco is in the America/Los_Angeles time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.