Q: What is the typical price of a round-trip flight between Portland, Maine and San Francisco?

Prices are currently low for flights on this route. Typical prices usually range from $567 to $358. The lowest price recently found on this route was $369.

Question 1

Which layover airport offers the lowest fares from Portland, Maine to San Francisco?

Accepted Answer

Flights via Chicago (ORD) offer the lowest average round-trip price of $285.

Question 2

How far in advance should I book a flight from Portland, Maine to San Francisco?

Accepted Answer

You are more likely to see cheaper flights to San Francisco from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $473 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, Maine for as low as $318 on momondo.

Question 3

What is the typical price of a round-trip flight between Portland, Maine and San Francisco?

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from $567 to $358.
The lowest price recently found on this route was $369.

Question 4

Which layover airport has the shortest connection time from Portland, Maine to San Francisco?

Accepted Answer

Chicago (ORD) has the shortest average layover time for this route: 1h 02m.

Question 5

What is the cheapest Portland to San Francisco flight route?

Accepted Answer

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

Question 6

What airlines fly to San Francisco?

Accepted Answer

JetBlue, United Airlines and Delta are the top three most popular airlines that fly to San Francisco from Portland, Maine according to our data. JetBlue is the first choice among our users, with 42% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 9 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Question 7

What is the cheapest airline that flies from Portland to San Francisco?

Accepted Answer

Southwest and Delta are the most popular carriers operating from Portland to San Francisco

Question 8

Which layover airport has the shortest travel time from Portland, Maine to San Francisco?

Accepted Answer

Flights connecting via Newark (EWR) have the shortest average one-way travel time: 8h 33m.

Question 9

How have Portland, Maine to San Francisco flight prices changed over time?

Accepted Answer

As of May 2026, prices for Portland, Maine to San Francisco flights are approximately 13% cheaper when compared to flights at the same time last year.

Question 10

Which airport is the most popular layover for flights between Portland, Maine and San Francisco?

Accepted Answer

Chicago (ORD) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Question 11

Can stopping save me money on Portland, Maine to San Francisco flights?

Accepted Answer

You could potentially save up to 39% on your flight if you consider stops on a Portland, Maine to San Francisco flight.

Question 12

What is the cheapest month to fly to San Francisco?

Accepted Answer

If you aren’t able to travel to San Francisco during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $379.

Question 13

When did momondo last update prices for flights from Portland Airport to San Francisco Airport?

Accepted Answer

Prices for flights from Portland Airport to San Francisco Airport refresh daily.

Question 14

How many operators does momondo search for flights from Portland Airport to San Francisco Airport?

Accepted Answer

There are 4 operators available for flights from Portland Airport to San Francisco Airport as of May 2026.

Question 15

How old do you have to be to fly from Portland Airport to San Francisco Airport?

Accepted Answer

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to San Francisco Airport.

Question 16

What documentation or ID do you need to fly to San Francisco Airport?

Accepted Answer

The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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