Cheap flights from San Francisco to Porto from $400
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Porto departing on 9/1. 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.
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 San Francisco to Porto
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
American Airlines flights from San Francisco to Porto
Our best American Airlines deals on San Francisco to Porto flight tickets
Air Transat flights from San Francisco to Porto
Our best Air Transat deals on San Francisco to Porto flight tickets
See travel insights to Porto from
How to get the cheapest flight ticket from San Francisco to Porto
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 Porto?
The month of January is, on average, the cheapest month to fly to Porto from San Francisco, with most prices found around $690. If you aren’t able to travel during the month of January, then book flights to Porto from San Francisco during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $725.
What is the cheapest day to depart on your flight to Porto?
The cheapest day to depart on your flight to Porto is on a Thursday when prices can be found for as low as $981. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,148. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.
What is the cheapest time of day to depart on your flight to Porto?
In the afternoon is the cheapest time of day to fly from San Francisco to Porto when you can find flight prices for as low as $896. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,138 on average. Flights to Porto from San Francisco in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to Porto?
You are more likely to see cheaper flights to Porto from San Francisco when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $969 when searching 20 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from San Francisco for as low as $877 on momondo.
What is the cheapest airline that flies from San Francisco to Porto?
Scandinavian Airlines, KLM, and SWISS are the most popular carriers operating from San Francisco to Porto
What airlines fly to Porto?
TAP AIR PORTUGAL, United Airlines and SWISS are the top three most popular airlines that fly to Porto from San Francisco according to our data. TAP AIR PORTUGAL is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 11 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.
When to book flights from San Francisco to Porto
Cheap San Francisco to Porto (SFO to OPO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco to Porto
How far is San Francisco to Porto by plane?
Porto is 5565.0 mi away from San Francisco. Typically, this will take 13h 40m by plane in normal conditions.
When did momondo last update prices for flights from San Francisco Airport to Porto Airport?
Prices for flights from San Francisco Airport to Porto Airport were last updated today.
How many operators does momondo search for flights from San Francisco Airport to Porto Airport?
There are 11 operators available for flights from San Francisco Airport to Porto Airport as of March 2025.
How old do you have to be to fly from San Francisco Airport to Porto 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 San Francisco Airport to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The necessary travel and health documents for your Porto 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 San Francisco to Porto?
Based on momondo bookings for flights between San Francisco and Porto, the leading airline is TAP AIR PORTUGAL, making up 27% of the total bookings. Other popular airlines include United Airlines with 21%, SWISS with 15%, and Lufthansa with 9%.
Best airlines flying from San Francisco to Porto
Compare and see reviews for airlines that fly from San Francisco to Porto with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $375 | Free Cancellation | Rating 7.1 1,827 reviews | |||
| PriceFrom $556 | Free Cancellation | Rating 7.0 2,651 reviews | |||
| PriceFrom $653 | Free Cancellation | Rating 7.0 8,981 reviews | |||
| PriceFrom $685 | Free Cancellation | Rating 8.0 7,895 reviews | |||
| PriceFrom $702 | Free Cancellation | Rating 7.8 1,321 reviews | |||
| PriceFrom $706 | Free Cancellation | Rating 7.4 8,603 reviews | |||
| PriceFrom $713 | Free Cancellation | Rating 7.5 1,570 reviews | |||
| PriceFrom $781 | Free Cancellation | Rating 7.8 381 reviews | |||
| PriceFrom $786 | Free Cancellation | Rating 7.1 1,146 reviews | |||
| PriceFrom $814 | Free Cancellation | Rating 6.7 6,955 reviews |
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from San Francisco to Porto?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from San Francisco.
Can I find flights from San Francisco to Porto with flexible booking policies on momondo?
Flights from San Francisco to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from San Francisco to Porto?
Once all potential San Francisco to Porto 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 San Francisco to Porto right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Porto, momondo offers a useful price alert feature which will track prices for flights to Porto from San Francisco and alert you when they change.