How long is the flight from Portland, Maine to San Francisco?

There are many flights that can get you from Portland, Maine to San Francisco in 9h 32m. Fly via United Airlines, American Airlines, or JetBlue to get the fastest option. Portland, Maine and San Francisco are separated by a distance of 2715 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from Portland, Maine to San Francisco round-trip?

American Airlines, at $233, was found to be the cheapest airline from Portland, Maine to San Francisco.Alternate airlines to your destination round-trip include United Airlines and Southwest. Users have found that American Airlines is 45% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Portland, Maine to San Francisco one-way?

The cheapest airlines for a one-way flight from Portland, Maine to San Francisco are American Airlines ($125), United Airlines ($128), and Delta ($138).

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What are the most popular airlines that fly from Portland, Maine to San Francisco?

When booking a flight from Portland, Maine to San Francisco, you may want to consider flying on American Airlines, United Airlines or Delta as they are the most popular for this route.

Most accurate provider : When it comes to deals on Portland, Maine-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland, Maine-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Portland, Maine-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Portland to San Francisco that include hotel bookings?

Yes. In addition to deals on Portland to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Portland to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to San Francisco.

Can I find deals for business class flights from Portland to San Francisco?

Yes. Cheapflights offers flight deals from Portland to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$126+ Flights from Portland, ME to San Francisco

Q: How much does it cost to fly round-trip from Portland, Maine to San Francisco?

Airfare is below average for this route at the moment. Portland, Maine to San Francisco flights typically cost between $282 and $574 in January. The cheapest round-trip price found within the last 3 days was $251 on United Airlines (Jan 17-Jan 24).

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Cheap flight deals from Portland to San Francisco

Cheapest flights from Portland to San Francisco
Explore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Sat 12/273:05 pmPWM - SFO

1 stop11h 20mSouthwest

Sun 12/289:25 pmSFO - PWM

1 stop14h 15mSouthwest

Deal found 12/27

$952

Best flights from Portland to San Francisco
Discover carefully curated flight deals from Portland to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

Sat 1/173:05 pmPWM - SFO

1 stop9h 32mUnited Airlines

Sat 1/249:30 pmSFO - PWM

1 stop8h 31mUnited Airlines

Deal found 12/26

$251

Sat 1/1712:46 pmPWM - SFO

2 stops13h 04mAmerican Airlines

Fri 1/2312:17 amSFO - PWM

2 stops12h 14mAmerican Airlines

Deal found 12/26

$261

Thu 4/96:00 amPWM - SFO

1 stop10h 56mJetBlue

Mon 4/1312:15 pmSFO - PWM

1 stop8h 32mJetBlue

Deal found 12/28

$265

Wed 2/185:31 amPWM - SFO

2 stops15h 25mDelta

Tue 2/2410:00 pmSFO - PWM

2 stops11h 00mDelta

Deal found 12/27

$267

Wed 1/216:16 amPWM - SFO

2 stops14h 27mDelta

Sun 1/2510:54 pmSFO - PWM

2 stops9h 26mDelta

Deal found 12/26

$282

Thu 1/228:40 amPWM - SFO

1 stop9h 55mUnited Airlines

Mon 1/269:30 pmSFO - PWM

1 stop8h 31mUnited Airlines

Deal found 12/26

$287

Mon 1/2612:40 pmPWM - SFO

1 stop12h 33mAmerican Airlines

Thu 1/2912:07 pmSFO - PWM

1 stop7h 47mAmerican Airlines

Deal found 12/26

$287

Tue 3/175:38 pmPWM - SFO

1 stop9h 07mAmerican Airlines

Tue 3/2411:50 pmSFO - PWM

1 stop9h 29mAmerican Airlines

Deal found 12/26

$287

Fri 1/1612:48 pmPWM - SFO

2 stops13h 37mDelta

Mon 1/1910:54 pmSFO - PWM

1 stop10h 09mDelta

Deal found 12/26

$292

Sun 1/185:30 amPWM - SFO

1 stop10h 25mDelta

Sun 1/1810:54 pmSFO - PWM

2 stops9h 26mDelta

Deal found 12/25

$292

Last-minute flights from Portland to San Francisco
Discover last-minute flight deals from Portland to San Francisco. Data last updated December 28, 2025 and is based on user searches.

Fri 1/1612:48 pmPWM - SFO

2 stops13h 37mDelta

Mon 1/1910:54 pmSFO - PWM

1 stop10h 09mDelta

Deal found 12/26

$292

Fri 1/1612:48 pmPWM - SFO

2 stops13h 37mDelta

Sun 1/1810:54 pmSFO - PWM

2 stops9h 26mDelta

Deal found 12/26

$297

Fri 1/1612:40 pmPWM - SFO

1 stop12h 33mAmerican Airlines

Mon 1/1911:13 pmSFO - PWM

1 stop9h 52mAmerican Airlines

Deal found 12/26

$323

Sat 1/173:05 pmPWM - SFO

1 stop9h 32mUnited Airlines

Sat 1/249:30 pmSFO - PWM

1 stop8h 31mUnited Airlines

Deal found 12/26

$251

Sat 1/1712:45 pmPWM - SFO

1 stop9h 50mAmerican Airlines

Fri 1/2312:17 amSFO - PWM

2 stops12h 14mAmerican Airlines

Deal found 12/26

$256

Sun 1/186:00 amPWM - SFO

2 stops12h 05mAmerican Airlines

Fri 1/2312:17 amSFO - PWM

2 stops12h 14mAmerican Airlines

Deal found 12/27

$279

Sun 1/186:00 amPWM - SFO

1 stop9h 15mUnited Airlines

Sun 1/189:30 pmSFO - PWM

1 stop8h 31mUnited Airlines

Deal found 12/26

$327

Wed 1/219:40 amPWM - SFO

1 stop10h 39mUnited Airlines

Sun 1/259:30 pmSFO - PWM

1 stop8h 31mUnited Airlines

Deal found 12/26

$269

Wed 1/2112:40 pmPWM - SFO

2 stops13h 32mAmerican Airlines

Sun 1/259:00 amSFO - PWM

1 stop10h 07mAmerican Airlines

Deal found 12/26

$274

Wed 1/216:16 amPWM - SFO

2 stops14h 27mDelta

Sun 1/2510:54 pmSFO - PWM

2 stops9h 26mDelta

Deal found 12/26

$282

Thu 1/228:40 amPWM - SFO

1 stop9h 55mUnited Airlines

Mon 1/269:30 pmSFO - PWM

1 stop8h 31mUnited Airlines

Deal found 12/26

$287

One-way flights from Portland to San Francisco
Search for one-way flight options from Portland to San Francisco. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

Tue 2/37:00 amPWM - SFO

1 stop9h 50mAmerican Airlines

Deal found 12/28

$126

Wed 3/412:13 pmPWM - SFO

1 stop9h 23mDelta

Deal found 12/26

$129

Tue 3/107:00 amPWM - SFO

1 stop10h 00mAmerican Airlines

Deal found 12/27

$144

Thu 3/512:43 pmPWM - SFO

2 stops13h 22mAmerican Airlines

Deal found 12/27

$149

Thu 3/56:00 amPWM - SFO

1 stop10h 38mUnited Airlines

Deal found 12/26

$176

Fri 3/612:43 pmPWM - SFO

1 stop10h 06mAmerican Airlines

Deal found 12/26

$194

Sun 2/1511:28 amPWM - SFO

1 stop11h 21mAmerican Airlines

Deal found 12/26

$210

Tue 3/106:14 pmPWM - SFO

3 stops49h 38mMultiple Airlines

Deal found 12/27

$246

Find flight deals from Portland to San Francisco

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$251 (American Airlines)
One-way from	$126 (American Airlines)
Popular in	December
Cheapest in	September
Average price	$591

Provider with most accurate pricing for Portland-San Francisco flight deals.

Search Deals

Provider most trusted by Cheapflights users for Portland-San Francisco flights.

Search Deals

From Portland to San Francisco

Search Deals

One-way flight from Portland to San Francisco

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($11 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 1/17

3:05 pm-9:37 pm

1 stop9h 32m

San Francisco

Sat 1/24

9:30 pm-9:01 am

1 stop8h 31m

$251

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 1/17

12:46 pm-10:50 pm

2 stops13h 04m

San Francisco

Fri 1/23

12:17 am-3:31 pm

2 stops12h 14m

$261

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Thu 4/9

6:00 am-1:56 pm

1 stop10h 56m

San Francisco

Mon 4/13

12:15 pm-11:47 pm

1 stop8h 32m

$265

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 2/18

5:31 am-5:56 pm

2 stops15h 25m

San Francisco

Tue 2/24

10:00 pm-12:00 pm

2 stops11h 00m

$267

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 1/21

6:16 am-5:43 pm

2 stops14h 27m

San Francisco

Sun 1/25

10:54 pm-11:20 am

2 stops9h 26m

$282

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Thu 1/22

8:40 am-3:35 pm

1 stop9h 55m

San Francisco

Mon 1/26

9:30 pm-9:01 am

1 stop8h 31m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Mon 1/26

12:40 pm-10:13 pm

1 stop12h 33m

San Francisco

Thu 1/29

12:07 pm-10:54 pm

1 stop7h 47m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 3/17

5:38 pm-11:45 pm

1 stop9h 07m

San Francisco

Tue 3/24

11:50 pm-12:19 pm

1 stop9h 29m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 1/16

12:48 pm-11:25 pm

2 stops13h 37m

San Francisco

Mon 1/19

10:54 pm-12:03 pm

1 stop10h 09m

$292

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sun 1/18

5:30 am-12:55 pm

1 stop10h 25m

San Francisco

Sun 1/18

10:54 pm-11:20 am

2 stops9h 26m

$292

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 15 results

Compare providers for flights from Portland to San Francisco

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to San Francisco in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Portland, Maine-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland, Maine-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Portland, Maine-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Portland with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to San Francisco

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

The best time to book flights from Portland, Maine to San Francisco is 77 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland, Maine to San Francisco?

Currently, March is the cheapest month in which you can book a flight from Portland, Maine to San Francisco (average of $103). Flying from Portland, Maine to San Francisco in May is currently the most expensive (average of $179). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PWM to SFO?

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from Portland, Maine to San Francisco by exploring options for tickets in the evening.

How much does it cost to fly round-trip from Portland, Maine to San Francisco?

Reviews of airlines servicing San Francisco

See what other customers who have flown with Southwest, Delta, and United Airlines from Portland to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,256 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

7.9

Good

8,019 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

9,113 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

11,073 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

JetBlue

7.2

Good

2,901 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

How long is the flight from Portland, Maine to San Francisco?
There are many flights that can get you from Portland, Maine to San Francisco in 9h 32m. Fly via United Airlines, American Airlines, or JetBlue to get the fastest option. Portland, Maine and San Francisco are separated by a distance of 2715 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from Portland, Maine to San Francisco round-trip?
American Airlines, at $233, was found to be the cheapest airline from Portland, Maine to San Francisco.Alternate airlines to your destination round-trip include United Airlines and Southwest. Users have found that American Airlines is 45% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Portland, Maine to San Francisco one-way?
The cheapest airlines for a one-way flight from Portland, Maine to San Francisco are American Airlines ($125), United Airlines ($128), and Delta ($138).
Can I find deals for flights from Portland to San Francisco that include hotel bookings?
Yes. In addition to deals on Portland to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to San Francisco.
Can I find deals for business class flights from Portland to San Francisco?
Yes. Cheapflights offers flight deals from Portland to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Portland, Maine to San Francisco?
Currently, March is the cheapest month in which you can book a flight from Portland, Maine to San Francisco (average of $103). Flying from Portland, Maine to San Francisco in May is currently the most expensive (average of $179). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Roseville

South San Francisco

Santa Cruz

Livermore

Turlock

Manteca

Watsonville

Redwood City

Sunnyvale

San Bruno

Daly City

Santa Clara

San Carlos

Vallejo

Hollister

San Ramon

Foster City

Union City

Davis

Emeryville

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Portland to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$233	Average$406	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$272	Average$477	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$276	Average$499	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$276	Average$386	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$320	Average$495	FlexibilityNo cancel fee	On-time62%

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$126+ Cheap flights from Portland, ME to San Francisco (PWM - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to San Francisco with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to San Francisco

Cheapest flights from Portland to San FranciscoExplore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Explore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Find flight deals from Portland to San Francisco

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to San Francisco that are best for you.

Compare providers for flights from Portland to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to San Francisco in December.

Best time to book a flight from Portland to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Portland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portland to San Francisco

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

What is the cheapest month to book a flight from Portland, Maine to San Francisco?

What is the cheapest time of day to fly from PWM to SFO?

How much does it cost to fly round-trip from Portland, Maine to San Francisco?

Reviews of airlines servicing San Francisco

See what other customers who have flown with Southwest, Delta, and United Airlines from Portland to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portland to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Portland, Maine to San Francisco?

What are the cheapest airlines flying from Portland, Maine to San Francisco round-trip?

What are the cheapest airlines to fly from Portland, Maine to San Francisco one-way?

Can I find deals for flights from Portland to San Francisco that include hotel bookings?

How can I find direct flights from Portland to San Francisco?

Can I find deals for business class flights from Portland to San Francisco?

What is the cheapest month to book a flight from Portland, Maine to San Francisco?

Traveling to a place near San Francisco?

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Alternative routes for Portland to San Francisco

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Top 5 airlines flying from Portland to San Francisco

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Cheapest flights from Portland to San Francisco
Explore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.