The cheapest times to fly from PWM to SFO are

  • January 1st to March 4th
  • August 20th to November 18th (except the week of October 8th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from PWM to SFO is late January. Prices can be as high as $1613 for Sunday flights during mid May, or as low as $291 for Tuesday flights around late January.


When to Fly to San Francisco

Flying from Portland, ME (PWM) to San Francisco, CA (SFO) will usually cost between $294 to $697 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $311. Due to high demand the most expensive time to fly is mid May, with an average price of $742. Planning your trip to low-cost times can easily save you $431 on economy flights and even more on first-class flights. Generally, any price below $407 can be considered a good price for a round-trip PWM to SFO flight.

See below for a graph of average weekly prices for the PWM to SFO route. All prices are for round-trip tickets in USD.

PWM to SFO Flight Prices

Compared to other flights, the PWM to SFO flight is much cheaper than the average and costs less than the average flight leaving from Portland. The average price per mile (for a direct flight) is $0.09, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $196 (36%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $350. Return trip prices are from the SFO to PWM flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from PWM to SFO can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 5 hour 52 minutes may not be realistic.


Flight Questions Answered

Still have questions about flying from PWM to SFO? We’ve got answers.

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Alaska, American, Cape Air, Delta, Emirates, Frontier, Hawaiian, JetBlue, Southwest, United, and potentially more during busy seasons.

How far away is it from San Francisco International Airport to Portland International Jetport Airport?

The distance between the two airports is roughly 2716 miles or 4371 kilometers.

How long does it take to fly from PWM to SFO?

The real-world flight time for a nonstop PWM to SFO flight is about 5 hour 52 minutes.

How many flights go between Portland, ME and San Francisco, CA?

It depends on the day of the week and the date, but a typical day might have around 77 available flights from PWM to SFO.


Airport Location Info


Departing Airport

Origination code PWM
Origination airport name Portland International Jetport Airport
City Portland, ME
Country the United States
Latitude 43.6
Longitude -70.3

Return Airport

Destination code SFO
Destination airport name San Francisco International Airport
City San Francisco, CA
Country the United States
Latitude 37.6
Longitude -122.4


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.