Cheap flights from Portland to San Francisco from £44

The month of January is, on average, the cheapest month to fly to San Francisco from Portland, with most prices found around £133. If you are unable to visit San Francisco during the month of January, then departing from Portland during the month October is also very affordable. Most momondo users find prices during this month for around £146.

The cheapest day to depart on your flight to San Francisco is on a Sunday when prices can be found for as low as £155. This is often the case because there is less demand to fly during this day of the week. Flights from Portland to San Francisco on a Friday will generally be more expensive and average around £183. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to San Francisco is at midday. Flights from Portland to San Francisco during this time can be as low as £66. Try not to purchase tickets in the morning because they tend to be around £357. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 £190 when searching weeks before you fly. 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 £131 on momondo.

There are 2 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.

Historically, on average around 26% 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 departing in the evening have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week that experiences the fewest 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 fewest delays on this route over the last 12 months, with about 25% of their flights experiencing any sort of delay.

As of October 2026, there are 31 flights per day flying from Portland to San Francisco. The most common time of day flights depart is 19:00, with 35% of flights taking off at midday.

218 flights are operational weekly from Portland to San Francisco as of October 2026. The most popular departure day for this route is Tue, with 25% of flights per week taking off on this day.