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Cheap flights from Portland, Maine to San Francisco from $126

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to San Francisco departing on 1/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Portland, Maine to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 12:15 pm
PWM
-
SFO
9h 15m1 stop
United Airlines Logo
9:30 pm - 9:01 am
SFO
-
PWM
8h 31m1 stop
$251United Airlines
Sat, Jan 17 - Sat, Jan 24
American Airlines Logo
12:45 pm - 7:35 pm
PWM
-
SFO
9h 50m1 stop
American Airlines Logo
9:00 am - 10:07 pm
SFO
-
PWM
10h 07m1 stop
$252American Airlines
Sat, Jan 17 - Sat, Jan 24
American Airlines Logo
12:46 pm - 10:06 pm
PWM
-
SFO
12h 20m2 stops
American Airlines Logo
9:00 am - 10:07 pm
SFO
-
PWM
10h 07m1 stop
$256American Airlines
Sat, Jan 17 - Sat, Jan 24
American Airlines Logo
12:46 pm - 10:50 pm
PWM
-
SFO
13h 04m2 stops
American Airlines Logo
12:17 am - 3:31 pm
SFO
-
PWM
12h 14m2 stops
$261American Airlines
Sat, Jan 17 - Fri, Jan 23
Delta Logo
5:30 am - 3:08 pm
PWM
-
SFO
12h 38m2 stops
Delta Logo
10:54 pm - 12:03 pm
SFO
-
PWM
10h 09m1 stop
$262Delta
Sat, Jan 17 - Sat, Jan 24
Delta Logo
1:13 pm - 11:25 pm
PWM
-
SFO
13h 12m2 stops
Delta Logo
10:54 pm - 11:20 am
SFO
-
PWM
9h 26m2 stops
$267Delta
Sat, Jan 17 - Sat, Jan 24
United Airlines Logo
2:31 pm - 10:57 pm
PWM
-
SFO
11h 26m1 stop
United Airlines Logo
9:30 pm - 9:01 am
SFO
-
PWM
8h 31m1 stop
$269United Airlines
Thu, Jan 15 - Tue, Jan 20
American Airlines Logo
6:00 am - 3:05 pm
PWM
-
SFO
12h 05m2 stops
American Airlines Logo
11:13 pm - 12:05 pm
SFO
-
PWM
9h 52m1 stop
$274American Airlines
Thu, Jan 15 - Tue, Jan 20
American Airlines Logo
6:00 am - 3:05 pm
PWM
-
SFO
12h 05m2 stops
American Airlines Logo
8:00 am - 11:43 pm
SFO
-
PWM
12h 43m2 stops
$279American Airlines
Thu, Jan 15 - Tue, Jan 20
Delta Logo
12:50 pm - 7:07 pm
PWM
-
SFO
9h 17m1 stop
Delta Logo
10:50 pm - 12:00 pm
SFO
-
PWM
10h 10m1 stop
$287Delta
Tue, Mar 17 - Tue, Mar 24

American Airlines flights from Portland, Maine to San Francisco

Our best American Airlines deals on Portland, Maine to San Francisco flight tickets
American Airlines
Jan 17
PWM12:45 pmPortland
9h 50m
1 stop
SFO7:35 pmSan Francisco
Jan 24
SFO9:00 amSan Francisco
10h 07m
1 stop
PWM10:07 pmPortland
$252
Find similar
American Airlines
Jan 17
PWM12:46 pmPortland
12h 20m
2 stops
SFO10:06 pmSan Francisco
Jan 24
SFO9:00 amSan Francisco
10h 07m
1 stop
PWM10:07 pmPortland
$256
Find similar
American Airlines
Jan 17
PWM12:46 pmPortland
13h 04m
2 stops
SFO10:50 pmSan Francisco
Jan 23
SFO12:17 amSan Francisco
12h 14m
2 stops
PWM3:31 pmPortland
$261
Find similar

Delta flights from Portland, Maine to San Francisco

Our best Delta deals on Portland, Maine to San Francisco flight tickets
Delta
Jan 17
PWM5:30 amPortland
12h 38m
2 stops
SFO3:08 pmSan Francisco
Jan 24
SFO10:54 pmSan Francisco
10h 09m
1 stop
PWM12:03 pmPortland
$262
Find similar
Delta
Jan 17
PWM1:13 pmPortland
13h 12m
2 stops
SFO11:25 pmSan Francisco
Jan 24
SFO10:54 pmSan Francisco
9h 26m
2 stops
PWM11:20 amPortland
$267
Find similar
Delta
Mar 17
PWM12:50 pmPortland
9h 17m
1 stop
SFO7:07 pmSan Francisco
Mar 24
SFO10:50 pmSan Francisco
10h 10m
1 stop
PWM12:00 pmPortland
$287
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine to San Francisco 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, momondo users made 832,500 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Portland, Maine 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

6:00 am-12:15 pm

1 stop9h 15m

San Francisco

Sat 1/24

9:30 pm-9:01 am

1 stop8h 31m

$251

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 1/17

12:45 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

12:46 pm-10:06 pm

2 stops12h 20m

San Francisco

Sat 1/24

9:00 am-10:07 pm

1 stop10h 07m

$256

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

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

Sat 1/17

1:13 pm-11:25 pm

2 stops13h 12m

San Francisco

Sat 1/24

10:54 pm-11:20 am

2 stops9h 26m

$267

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

Thu 1/15

6:00 am-3:05 pm

2 stops12h 05m

San Francisco

Tue 1/20

8:00 am-11:43 pm

2 stops12h 43m

$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

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Portland, Maine to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $361.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Portland, Maine to San Francisco is on a Wednesday when prices can be found for as low as $382. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $549.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Portland, Maine to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $336. Flights at noon are often more expensive with an average ticket price of $525.

How far in advance should I book a flight to San Francisco?

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 $429 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 $320 on momondo.

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

You could potentially save up to 28% on your flight if you consider stops on a Portland, Maine to San Francisco flight.

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

As of December 2025, prices for Portland, Maine to San Francisco flights are approximately 12% cheaper when compared to flights at the same time last year.

When to book flights from Portland, Maine to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland, Maine to San Francisco (PWM to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to San Francisco

Fastest flight time

8h 41m

Direct flights

None
The fastest flight from Portland, Maine to San Francisco takes 8h 41m
There are no direct flights from Portland, Maine to San Francisco. There are no popular flight routes from Portland, Maine to San Francisco.
Search flight deals

  • How far is Portland to San Francisco by plane?

    Portland and San Francisco are 2713.8 mi apart from one another. In terms of flight time, this usually takes a little over 8h 41m.

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

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

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

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

    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.

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

    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.

  • What is the most popular airline from Portland, Maine to San Francisco?

Best airlines flying from Portland, Maine to San Francisco

Compare and see reviews for airlines that fly from Portland, Maine to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $233Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
SouthwestPriceFrom $272Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
DeltaPriceFrom $276Free CancellationRating
7.9
8,005 reviews
Search Delta flights
JetBluePriceFrom $320Free CancellationRating
7.2
2,897 reviews
Search JetBlue flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Bodega Bay
Roseville
Hayward
Calistoga
Big Sur
Berkeley
Santa Clara
Walnut Creek
Fremont
Daly City
Half Moon Bay
Vallejo
Salinas
Livermore
Sunnyvale
Turlock

Why use momondo?

Why should I use momondo to find a flight deal from Portland to San Francisco?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to San Francisco for you.

Can I find flights from Portland to San Francisco with flexible booking policies on momondo?

Yes. All flights to San Francisco from Portland on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Portland to San Francisco?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from Portland.

I’m not ready to book a flight from Portland to San Francisco right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Portland to San Francisco now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Francisco and let you know when they change.

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