Cheap flights from San Francisco to Portland from £67

The cheapest month to fly to Portland from San Francisco is in September. Flight prices, which tend to average around £176, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in September, then you should wait until October to fly from San Francisco, when ticket prices are also cheap, with an average price of £182.

The cheapest day to depart on your flight to Portland is on a Friday when prices can be found for as low as £118. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Thursday, with ticket prices averaging around £377.

Flying to Portland from San Francisco in the morning is the least expensive time of day to depart. momondo users have found prices as low as £149 when looking at flights departing in the morning. Try not to purchase tickets in the afternoon because they tend to be around £170. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to Portland from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around £205 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from San Francisco for as low as £122 on momondo.

Historically, on average around 14% of flights between San Francisco and Portland have experienced a delay on any given week. The average delay length over the past 12 months has been 122 minutes.

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

Tuesday 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 12% of their flights experiencing any sort of delay.

34 flights are operational daily from San Francisco to Portland as of May 2026. The most popular departure time for this route is 14:00, with 53% of flights per day taking off in the afternoon.

As of May 2026, 239 flights take off from San Francisco and land in Portland each week. The most common flight departure day for this route is Sun, with 21% of weekly flights taking off on this day.