Cheap flights from Portland to San Francisco from $70

If you aren’t able to travel to San Francisco during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $181.

The cheapest day to depart from Portland to San Francisco is on a Friday when prices can be found for as low as $380. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $724.

Our data shows that the cheapest Portland to San Francisco flights are usually those with departure times at noon. Our users have found flights to San Francisco at noon for as low as $312. Flights in the evening are often more expensive with an average ticket price of $644.

Fly from Portland to San Francisco for the best Portland - San Francisco flight prices

You are more likely to see cheaper flights to San Francisco from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $246 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Portland for as low as $174 on momondo.

There are 4 cabin classes available to choose from on Portland to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, United Airlines, and Alaska Airlines are the most popular carriers operating from Portland to San Francisco

Alaska Airlines, United Airlines and Southwest are the top three most popular airlines that fly to San Francisco from Portland according to our data. Alaska Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 7 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between Portland and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 113 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 19% of their flights experiencing any sort of delay.

Denver (DEN) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Flights via Seattle (SEA) offer the lowest average round-trip price of $136.

Flights connecting via Seattle (SEA) have the shortest average one-way travel time: 4h 09m.

Seattle (SEA) has the shortest average layover time for this route: 0h 57m.

37 flights are operational daily from Portland to San Francisco as of August 2026. The most popular departure time for this route is 8:00AM, with 51% of flights per day taking off at noon.

The number of flights available between Portland and San Francisco is 260 per week as of August 2026. The most frequent departure day is Fri, with 23% of weekly flights leaving on this day.