Cheap flights from Porto to San Francisco from $363
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to San Francisco departing on 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Porto to San Francisco
Cheap round-trip flights
Cheap one-way flights
TAP AIR PORTUGAL flights from Porto to San Francisco
Our best TAP AIR PORTUGAL deals on Porto to San Francisco flight tickets
American Airlines flights from Porto to San Francisco
Our best American Airlines deals on Porto to San Francisco flight tickets
See travel insights to San Francisco from
How to get the cheapest flight ticket from Porto to San Francisco
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to San Francisco?
If you aren’t able to travel to San Francisco during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $683.
What is the cheapest day to depart on your flight to San Francisco?
The cheapest day to depart from Porto to San Francisco is on a Wednesday when prices can be found for as low as $668. The most expensive day to fly to San Francisco is Saturday, with ticket prices averaging around $941.
When to book flights from Porto to San Francisco
Cheap Porto to San Francisco (OPO to SFO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Porto to San Francisco
How far is Porto to San Francisco by plane?
There are 5565.0 mi between Porto and San Francisco. Typically, this will take 15h 30m by plane in normal conditions.
When did momondo last update prices for flights from Porto Airport to San Francisco Airport?
Prices for flights from Porto Airport to San Francisco Airport refresh daily.
How many operators does momondo search for flights from Porto Airport to San Francisco Airport?
The number of operators available for flights from Porto Airport to San Francisco Airport is 2 as of June 2025.
How old do you have to be to fly from Porto Airport to San Francisco Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Porto Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Porto to San Francisco?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Porto to San Francisco is Lufthansa (59% of total bookings). The next most popular airline is United Airlines (41%).
Best airlines flying from Porto to San Francisco
Compare and see reviews for airlines that fly from Porto to San Francisco with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $657 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $665 | Free Cancellation | Rating 6.7 7,139 reviews |
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Porto to San Francisco?
It is quick and easy to find Porto to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.
Can I find flights from Porto to San Francisco with flexible booking policies on momondo?
Yes. All flights to San Francisco from Porto on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Porto to San Francisco?
Once all potential Porto to San Francisco flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Porto to San Francisco right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Porto to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.