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San Francisco Bay Area

$126+ Cheap flights from Portland, ME (PWM) to San Francisco Bay Area

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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SFO
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Portland to San Francisco Bay Area

Cheapest flights from Portland to San Francisco Bay Area
Explore the most affordable flight options available from Portland to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:37 pmPWM - SFO
1 stop9h 28mAmerican Airlines
Fri 1/912:17 amSFO - PWM
2 stops12h 14mAmerican Airlines
Deal found 12/17$531
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:48 pmPWM - SFO
1 stop8h 41mDelta
Sat 1/105:45 amSFO - PWM
2 stops13h 42mDelta
Deal found 12/16$534
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:45 amPWM - SFO
1 stop10h 07mDelta
Mon 1/1910:54 pmSFO - PWM
1 stop10h 09mDelta
Deal found 12/16$544
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:10 pmPWM - SFO
1 stop9h 45mUnited Airlines
Sat 1/109:30 pmSFO - PWM
1 stop8h 31mUnited Airlines
Deal found 12/17$626
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:48 pmPWM - SFO
1 stop8h 41mDelta
Fri 12/265:50 amSFO - PWM
1 stop7h 18mDelta
Deal found 12/17$700
This American Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/165:34 amPWM - SFO
2 stops14h 46mAmerican Airlines
Thu 12/189:15 amSFO - PWM
2 stops11h 27mAmerican Airlines
Deal found 12/15$702
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/214:10 pmPWM - SJC
1 stop9h 24mUnited Airlines
Mon 12/2910:30 pmSJC - PWM
2 stops12h 09mUnited Airlines
Deal found 12/17$992
This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:10 pmPWM - SJC
1 stop9h 24mUnited Airlines
Tue 12/3010:30 pmSJC - PWM
1 stop12h 44mUnited Airlines
Deal found 12/16$1,031
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/229:30 amPWM - SJC
2 stops14h 46mUnited Airlines
Sun 12/2810:30 pmSJC - PWM
1 stop19h 59mUnited Airlines
Deal found 12/17$1,201
This Southwest deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:15 pmPWM - OAK
2 stops12h 05mSouthwest
Tue 12/3011:15 amOAK - PWM
2 stops9h 50mSouthwest
Deal found 12/16$1,255
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:45 amPWM - OAK
2 stops13h 19mDelta
Sun 12/285:53 amOAK - PWM
2 stops13h 50mDelta
Deal found 12/16$1,780
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:45 amPWM - OAK
2 stops13h 19mDelta
Tue 12/305:53 amOAK - PWM
2 stops13h 50mDelta
Deal found 12/16$1,811

Find flight deals from Portland to San Francisco Bay Area

Keep the following information in mind while searching for Portland to San Francisco Bay Area flight deals. Data was last updated December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$251
(United Airlines)

One-way from

$126
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$447
Provider with most accurate pricing for Boston Logan Intl-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-San Francisco flights.
Search Deals
From Portland to San Francisco Bay Area
Search Deals
One-way flight from Portland to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to San Francisco Bay Area that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Portland to San Francisco Bay Area that are best for you.

Fly from

Portland

Fly to

San Francisco Bay Area

Route

Depart

Return

Price

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 1/17

12:45 pm-7:35 pm

1 stop9h 50m

San Francisco

Sat 1/24

9:00 am-10:07 pm

1 stop10h 07m

$252

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 1/17

5:30 am-3:08 pm

2 stops12h 38m

San Francisco

Sat 1/24

10:54 pm-12:03 pm

1 stop10h 09m

$262

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 1/20

4:10 pm-11:00 pm

1 stop9h 50m

San Francisco

Mon 1/26

9:30 pm-9:01 am

1 stop8h 31m

$269

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Thu 1/15

2:31 pm-10:57 pm

1 stop11h 26m

San Francisco

Tue 1/20

9:30 pm-9:01 am

1 stop8h 31m

$269

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Thu 1/15

6:00 am-3:05 pm

2 stops12h 05m

San Francisco

Tue 1/20

11:13 pm-12:05 pm

1 stop9h 52m

$274

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 1/20

5:20 am-2:37 pm

2 stops12h 17m

San Francisco

Sun 1/25

12:17 am-3:31 pm

2 stops12h 14m

$279

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 3/17

12:50 pm-7:07 pm

1 stop9h 17m

San Francisco

Tue 3/24

10:50 pm-12:00 pm

1 stop10h 10m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Mon 5/4

7:06 pm-1:16 am

1 stop9h 10m

San Francisco

Mon 5/11

10:36 pm-10:24 am

1 stop8h 48m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Thu 4/9

6:01 am-11:47 am

1 stop8h 46m

San Francisco

Mon 4/13

11:08 pm-12:00 pm

1 stop9h 52m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Mon 2/9

12:46 pm-10:34 pm

2 stops12h 48m

San Francisco

Thu 2/12

8:57 am-10:51 pm

1 stop10h 54m

$292

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 34 results
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Best time to book a flight from Portland to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area 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 Bay Area

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

Currently, March is the cheapest month in which you can book a flight from Portland, Maine to San Francisco Bay Area (average of $103). Flying from Portland, Maine to San Francisco Bay Area 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 XIH?

Find hourly flight availability from Portland to San Francisco Bay Area. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

One of the essential ways to save on airfare from Portland, Maine to San Francisco Bay Area is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 55% on airfare.

What is the cheapest day to fly from Portland, Maine to San Francisco Bay Area?

Use this chart to determine the cheapest time to fly round-trip from Portland to San Francisco Bay Area. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland, Maine to San Francisco Bay Area flight should consider departing on Saturday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing San Francisco Bay Area

Get insights into the airlines that provide service to San Francisco Bay Area. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco Bay Area. Reviews last updated December 18, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Portland to San Francisco Bay Area to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.5

Comfort

8.0

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
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.5

Comfort

8.0

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.
Delta
7.9
Good
8,005 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.5

Comfort

8.0

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.
United Airlines
7.4
Good
9,091 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.5

Comfort

8.0

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.
American Airlines
7.2
Good
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.5

Comfort

8.0

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.
JetBlue
7.2
Good
2,897 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.5

Comfort

8.0

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.

Related info for your journey

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

  • What airport do you fly from for flights from Portland to San Francisco Bay Area?

    Most people fly from Portland (PWM) if they book a flight from Portland to San Francisco Bay Area. Portland is conveniently located just 2.9 mi from Portland’s city center.

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

    There are many flights that can get you from Portland, Maine to San Francisco Bay Area in 9h 50m. Fly via American Airlines, Delta, or United Airlines to get the fastest option. Airlines will cover a distance of 2715 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $125. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Portland, Maine to San Francisco Bay Area for a low price.

  • What are the most popular routes from Portland, Maine to San Francisco Bay Area?

    The most popular route from Portland, Maine to San Francisco Bay Area is Portland - San Francisco. You may also consider Portland - Oakland or Portland - San Jose.

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

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

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

    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 Bay Area.

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

    Yes. Cheapflights offers flight deals from Portland to San Francisco Bay Area 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 Bay Area?

    Currently, March is the cheapest month in which you can book a flight from Portland, Maine to San Francisco Bay Area (average of $103). Flying from Portland, Maine to San Francisco Bay Area 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.

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Top 5 airlines flying from Portland to San Francisco Bay Area

Discover the top 5 airlines that operate flights from Portland to San Francisco Bay Area. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$233Average$405FlexibilityNo cancel feeOn-time71%
DeltaCheapest$253Average$424FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$272Average$441FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$276Average$501FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$320Average$495FlexibilityNo cancel feeOn-time62%

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