Cheap Flights from Porto to San Francisco
No deal from Porto to San Francisco has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from Porto to San Francisco, the lowest round-trip fare we recorded was $713, in October. The typical fare was $771. October was the cheapest month we saw and July the dearest.
The most recent price we saw on this route was $799 on Tap Air Portugal, seen Oct 15. It is an unverified observation and may have changed.
See every deal <a href="/from/porto">from Porto</a>, <a href="/to/san-francisco">to San Francisco</a>, or the return direction <a href="/from/san-francisco/to/porto">San Francisco to Porto</a>.
Latest price we saw: Porto to San Francisco
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Porto (OPO) to San Francisco (SFO) | $799 | 7.2¢ | Jan 18 – Jan 25 | Tap Air Portugal | Oct 15 | Check price |
Price history: Porto to San Francisco
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $713 | $777 | 4 |
| Sep 2026 | $730 | $756 | 2 |
| Aug 2026 | $757 | $788 | 8 |
| Jul 2026 | $764 | $764 | 1 |
Frequently asked questions
How many flight deals from Porto to San Francisco are on Sparkflights right now?
There are 0 verified deals from Porto to San Francisco on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Porto to San Francisco?
The lowest fare we've recorded from Porto to San Francisco is $713, based on 15 price observations over 4 months.
How much does a flight from Porto to San Francisco cost?
The typical round-trip fare we observed from Porto to San Francisco is $771, against a recorded low of $713. These are observations, not quotes.
When is the cheapest month to fly Porto to San Francisco?
October was the cheapest month we observed from Porto to San Francisco and July the dearest, over 4 months of data.
What is the current price from Porto to San Francisco?
The most recent fare our sweep saw from Porto to San Francisco is $799, on Oct 15. It is an unverified observation rather than a verified deal, so check it before booking.