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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 3/4. 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.
Delta Logo
6:00 am - 5:49 pm
PWM
-
SFO
14h 49m
2 stops
Delta Logo
10:45 pm - 12:00 pm
SFO
-
PWM
10h 15m
1 stop
$262Delta
Tue, Feb 24 - Wed, Mar 4
Delta Logo
6:00 am - 5:49 pm
PWM
-
SFO
14h 49m
2 stops
Delta Logo
8:00 am - 11:20 pm
SFO
-
PWM
12h 20m
2 stops
$267Delta
Tue, Feb 24 - Wed, Mar 4
United Airlines Logo
3:05 pm - 11:57 pm
PWM
-
SFO
11h 52m
1 stop
United Airlines Logo
7:00 am - 6:25 pm
SFO
-
PWM
8h 25m
1 stop
$279United Airlines
Tue, Mar 3 - Tue, Mar 10
Delta Logo
12:45 pm - 6:36 pm
PWM
-
SFO
8h 51m
1 stop
Delta Logo
5:50 am - 4:06 pm
SFO
-
PWM
7h 16m
1 stop
$282Delta
Sat, Feb 28 - Wed, Mar 11
American Airlines Logo
5:40 pm - 11:47 pm
PWM
-
SFO
9h 07m
1 stop
American Airlines Logo
11:29 pm - 12:14 pm
SFO
-
PWM
9h 45m
2 stops
$284American Airlines
Tue, Mar 3 - Tue, Mar 10
Delta Logo
12:45 pm - 6:36 pm
PWM
-
SFO
8h 51m
1 stop
Delta Logo
5:50 am - 11:59 pm
SFO
-
PWM
15h 09m
2 stops
$287Delta
Sat, Feb 28 - Thu, Mar 12
Delta Logo
12:43 pm - 11:49 pm
PWM
-
SFO
14h 06m
2 stops
Delta Logo
10:35 pm - 1:50 pm
SFO
-
PWM
12h 15m
2 stops
$292Delta
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
5:51 pm - 11:59 pm
PWM
-
SFO
9h 08m
1 stop
American Airlines Logo
10:35 pm - 10:23 am
SFO
-
PWM
8h 48m
1 stop
$307American Airlines
Thu, Apr 9 - Mon, Apr 13
United Airlines Logo
7:10 pm - 1:16 am
PWM
-
SFO
9h 06m
1 stop
United Airlines Logo
10:35 pm - 10:02 am
SFO
-
PWM
8h 27m
1 stop
$309United Airlines
Tue, May 19 - Sun, May 24
Delta Logo
5:31 am - 12:50 pm
PWM
-
SFO
10h 19m
1 stop
Delta Logo
5:50 am - 11:59 pm
SFO
-
PWM
15h 09m
2 stops
$312Delta
Fri, Mar 6 - Thu, Mar 12

United Airlines flights from Portland, Maine to San Francisco

Our best United Airlines deals on Portland, Maine to San Francisco flight tickets
United Airlines
Mar 3
PWM3:05 pmPortland
11h 52m
1 stop
SFO11:57 pmSan Francisco
Mar 10
SFO7:00 amSan Francisco
8h 25m
1 stop
PWM6:25 pmPortland
$279
United Airlines
May 19
PWM7:10 pmPortland
9h 06m
1 stop
SFO1:16 amSan Francisco
May 24
SFO10:35 pmSan Francisco
8h 27m
1 stop
PWM10:02 amPortland
$309
United Airlines
Jun 25
PWM7:15 pmPortland
9h 01m
1 stop
SFO1:16 amSan Francisco
Jul 6
SFO9:30 pmSan Francisco
9h 32m
1 stop
PWM10:02 amPortland
$339

Delta flights from Portland, Maine to San Francisco

Our best Delta deals on Portland, Maine to San Francisco flight tickets
Delta
Feb 24
PWM6:00 amPortland
14h 49m
2 stops
SFO5:49 pmSan Francisco
Mar 4
SFO10:45 pmSan Francisco
10h 15m
1 stop
PWM12:00 pmPortland
$262
Delta
Feb 24
PWM6:00 amPortland
14h 49m
2 stops
SFO5:49 pmSan Francisco
Mar 4
SFO8:00 amSan Francisco
12h 20m
2 stops
PWM11:20 pmPortland
$267
Delta
Feb 28
PWM12:45 pmPortland
8h 51m
1 stop
SFO6:36 pmSan Francisco
Mar 11
SFO5:50 amSan Francisco
7h 16m
1 stop
PWM4:06 pmPortland
$282

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 February 5, 2026.
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

Tue 2/24

6:00 am-5:49 pm

2 stops14h 49m

San Francisco

Wed 3/4

10:45 pm-12:00 pm

1 stop10h 15m

$262

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 2/24

6:00 am-5:49 pm

2 stops14h 49m

San Francisco

Wed 3/4

8:00 am-11:20 pm

2 stops12h 20m

$267

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 3/3

3:05 pm-11:57 pm

1 stop11h 52m

San Francisco

Tue 3/10

7:00 am-6:25 pm

1 stop8h 25m

$279

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 2/28

12:45 pm-6:36 pm

1 stop8h 51m

San Francisco

Wed 3/11

5:50 am-4:06 pm

1 stop7h 16m

$282

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 3/3

5:40 pm-11:47 pm

1 stop9h 07m

San Francisco

Tue 3/10

11:29 pm-12:14 pm

2 stops9h 45m

$284

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

Tue 3/3

12:43 pm-11:49 pm

2 stops14h 06m

San Francisco

Tue 3/10

10:35 pm-1:50 pm

2 stops12h 15m

$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

Tue 5/19

7:10 pm-1:16 am

1 stop9h 06m

San Francisco

Sun 5/24

10:35 pm-10:02 am

1 stop8h 27m

$309

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 3/6

5:31 am-12:50 pm

1 stop10h 19m

San Francisco

Thu 3/12

5:50 am-11:59 pm

2 stops15h 09m

$312

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 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 Portland to San Francisco flight route?

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

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 $434 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.

What cabin class options are available on Portland to San Francisco flights?

There is only 1 cabin class available to choose from on Portland to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of February 2026, prices for Portland, Maine to San Francisco flights are approximately 26% more expensive 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

6h 35m

Direct flights

Sun

Airports in San Francisco

1 airport
The fastest flight from Portland, Maine to San Francisco takes 6h 35m
Direct flights go from Portland, Maine to San Francisco on Sunday. There are no airlines offering direct flights.
There is 1 airport in San Francisco. From Portland, Maine there are direct flights to San Francisco (SFO).
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 6h 35m.

  • 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 $238Free CancellationRating
7.2
11,237 reviews
Search American Airlines flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
9,240 reviews
Search United Airlines flights
SouthwestPriceFrom $272Free CancellationRating
8.0
4,275 reviews
Search Southwest flights
DeltaPriceFrom $276Free CancellationRating
7.9
8,151 reviews
Search Delta flights
JetBluePriceFrom $320Free CancellationRating
7.2
2,893 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
Santa Clara
Walnut Creek
Berkeley
Big Sur
Fremont
Half Moon Bay
Daly City
Salinas
Vallejo
Sunnyvale
Livermore
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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