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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SFO
Mar 7 — Mar 141
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to San Francisco Bay Area with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 5, 2026.

This Delta deal was found by Cheapflights users on 2/1. 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.
Tue 2/245:31 am
PWM
-
SFO
2 stops15h 25m
Delta
Tue 3/310:45 pm
SFO
-
PWM
1 stop10h 15m
Delta
Deal found 2/1$262
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 3/33:05 pm
PWM
-
SFO
1 stop11h 52m
United Airlines
Tue 3/107:00 am
SFO
-
PWM
1 stop8h 25m
United Airlines
Deal found 2/3$279
This Delta deal was found by Cheapflights users on 2/1. 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 2/2812:45 pm
PWM
-
SFO
1 stop8h 51m
Delta
Wed 3/115:50 am
SFO
-
PWM
1 stop7h 16m
Delta
Deal found 2/1$282
This American Airlines deal was found by Cheapflights users on 2/1. 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 3/35:40 pm
PWM
-
SFO
1 stop9h 07m
American Airlines
Tue 3/107:00 pm
SFO
-
PWM
2 stops12h 28m
American Airlines
Deal found 2/1$284
This Delta deal was found by Cheapflights users on 2/1. 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 2/2812:45 pm
PWM
-
SFO
1 stop8h 51m
Delta
Thu 3/125:50 am
SFO
-
PWM
2 stops15h 09m
Delta
Deal found 2/1$287
This Delta deal was found by Cheapflights users on 2/1. 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.
Tue 3/32:35 pm
PWM
-
SFO
2 stops12h 14m
Delta
Mon 3/99:35 pm
SFO
-
PWM
2 stops11h 34m
Delta
Deal found 2/1$292
This American Airlines deal was found by Cheapflights users on 2/5. 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.
Thu 4/95:51 pm
PWM
-
SFO
1 stop9h 08m
American Airlines
Mon 4/1310:35 pm
SFO
-
PWM
1 stop8h 48m
American Airlines
Deal found 2/5$307
This Delta deal was found by Cheapflights users on 2/3. 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.
Fri 3/612:13 pm
PWM
-
SFO
1 stop9h 23m
Delta
Tue 3/1010:35 pm
SFO
-
PWM
2 stops12h 15m
Delta
Deal found 2/3$312
This Delta deal was found by Cheapflights users on 2/1. 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.
Fri 3/65:31 am
PWM
-
SFO
2 stops15h 25m
Delta
Mon 3/99:35 pm
SFO
-
PWM
2 stops11h 34m
Delta
Deal found 2/1$317
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 4/2211:56 am
PWM
-
SFO
1 stop11h 16m
American Airlines
Wed 4/296:00 am
SFO
-
PWM
1 stop8h 21m
American Airlines
Deal found 2/3$324
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 2/265:31 am
PWM
-
SJC
1 stop10h 08m
Delta
Mon 3/26:25 pm
SJC
-
PWM
2 stops14h 35m
Delta
Deal found 2/4$364
This Delta deal was found by Cheapflights users on 2/3. 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.
Tue 5/121:18 pm
PWM
-
SJC
2 stops12h 37m
Delta
Tue 5/1912:08 pm
SJC
-
PWM
1 stop8h 10m
Delta
Deal found 2/3$372

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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$262
(Delta)

One-way from

$126
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$420
Provider with most accurate pricing for Portland-San Francisco flight deals.
Provider most trusted by Cheapflights users for Portland-San Francisco flights.
From Portland to San Francisco Bay Area
One-way flight from Portland to San Francisco Bay Area
Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Average for round-trip flights in February 2026

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 February 5, 2026.
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 2/28

12:45 pm-6:36 pm

1 stop8h 51m

San Francisco

Tue 3/10

11:35 pm-4:06 pm

2 stops13h 31m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 2/28

12:45 pm-6:36 pm

1 stop8h 51m

San Francisco

Thu 3/12

5:50 am-11:59 pm

2 stops15h 09m

$287

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 3/4

2:35 pm-11:47 pm

2 stops12h 12m

San Francisco

Wed 3/11

10:40 pm-1:50 pm

2 stops12h 10m

$292

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Thu 4/9

5:51 pm-11:59 pm

1 stop9h 08m

San Francisco

Mon 4/13

10:35 pm-10:23 am

1 stop8h 48m

$307

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 4/25

7:33 pm-1:17 am

1 stop8h 44m

San Francisco

Sat 5/2

11:05 pm-10:18 am

1 stop8h 13m

$307

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 4/8

12:51 pm-7:07 pm

1 stop9h 16m

San Francisco

Wed 4/15

5:50 am-3:57 pm

1 stop7h 07m

$307

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 4/8

12:51 pm-7:07 pm

1 stop9h 16m

San Francisco

Tue 4/14

5:50 am-3:57 pm

1 stop7h 07m

$307

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 3/6

12:13 pm-6:36 pm

1 stop9h 23m

San Francisco

Tue 3/10

10:35 pm-1:50 pm

2 stops12h 15m

$312

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 3/21

12:51 pm-7:07 pm

1 stop9h 16m

San Francisco

Tue 3/24

6:28 pm-12:09 pm

2 stops14h 41m

$312

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 3/21

12:51 pm-7:07 pm

1 stop9h 16m

San Francisco

Mon 3/23

10:40 pm-11:04 am

2 stops9h 24m

$312

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 52 results
1
2
3
...
6

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 January is currently the most expensive (average of $181). 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.

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 February 5, 2026.
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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

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 8h 51m. Fly via Delta, American Airlines, or Southwest 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?

  • 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 January is currently the most expensive (average of $181). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to San Francisco Bay Area

See prices for flight routes from nearby airports that may be better suited for you.

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 February 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$423FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$238Average$386FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$268Average$527FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$272Average$476FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$320Average$495FlexibilityNo cancel feeOn-time62%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.