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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 10/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portland, Maine to San Francisco

Cheap round-trip flights

American Airlines Logo
1:14 pm - 7:08 pmPWM-SFO
8h 54m1 stop
American Airlines Logo
8:45 am - 10:32 pmSFO-PWM
10h 47m1 stop
$239American Airlines
Find Deal
Fri, Oct 31 - Sat, Nov 8
Southwest Logo
2:40 pm - 7:50 pmPWM-SFO
8h 10m1 stop
Southwest Logo
6:25 am - 9:55 pmSFO-PWM
12h 30m2 stops
$244Southwest
Find Deal
Fri, Oct 31 - Sat, Nov 8
Southwest Logo
5:25 am - 12:10 pmPWM-SFO
9h 45m2 stops
Southwest Logo
6:25 am - 9:55 pmSFO-PWM
12h 30m2 stops
$249Southwest
Find Deal
Fri, Oct 31 - Sat, Nov 8
American Airlines Logo
3:52 pm - 10:05 pmPWM-SFO
9h 13m1 stop
American Airlines Logo
9:00 am - 9:35 pmSFO-PWM
9h 35m1 stop
$251American Airlines
Find Deal
Wed, Nov 5 - Tue, Nov 11
American Airlines Logo
3:52 pm - 10:05 pmPWM-SFO
9h 13m1 stop
American Airlines Logo
7:10 am - 9:35 pmSFO-PWM
11h 25m2 stops
$256American Airlines
Find Deal
Wed, Nov 5 - Tue, Nov 11
Southwest Logo
12:45 pm - 10:30 pmPWM-SFO
12h 45m2 stops
Southwest Logo
8:20 am - 10:15 pmSFO-PWM
10h 55m2 stops
$261Southwest
Find Deal
Wed, Nov 12 - Wed, Nov 19
United Airlines Logo
7:25 pm - 12:55 amPWM-SFO
8h 30m1 stop
United Airlines Logo
5:15 am - 5:42 pmSFO-PWM
9h 27m1 stop
$269United Airlines
Find Deal
Wed, Oct 8 - Sun, Oct 12
Delta Logo
1:27 pm - 10:30 pmPWM-SFO
12h 03m1 stop
Delta Logo
5:55 am - 4:03 pmSFO-PWM
7h 08m1 stop
$277Delta
Find Deal
Sat, Nov 1 - Sat, Nov 8
United Airlines Logo
7:25 pm - 12:55 amPWM-SFO
8h 30m1 stop
United Airlines Logo
1:02 pm - 11:59 pmSFO-PWM
7h 57m1 stop
$280United Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
Delta Logo
4:48 pm - 10:35 pmPWM-SFO
8h 47m1 stop
Delta Logo
5:55 am - 4:03 pmSFO-PWM
7h 08m1 stop
$282Delta
Find Deal
Wed, Oct 29 - Sun, Nov 2

American Airlines flights from Portland, Maine to San Francisco

Our best American Airlines deals on Portland, Maine to San Francisco flight tickets
American Airlines
Oct 31
PWM1:14 pmPortland
8h 54m
1 stop
SFO7:08 pmSan Francisco
Nov 8
SFO8:45 amSan Francisco
10h 47m
1 stop
PWM10:32 pmPortland
$239
Find similar
American Airlines
Nov 5
PWM3:52 pmPortland
9h 13m
1 stop
SFO10:05 pmSan Francisco
Nov 11
SFO9:00 amSan Francisco
9h 35m
1 stop
PWM9:35 pmPortland
$251
Find similar
American Airlines
Nov 5
PWM3:52 pmPortland
9h 13m
1 stop
SFO10:05 pmSan Francisco
Nov 11
SFO7:10 amSan Francisco
11h 25m
2 stops
PWM9:35 pmPortland
$256
Find similar

United Airlines flights from Portland, Maine to San Francisco

Our best United Airlines deals on Portland, Maine to San Francisco flight tickets
United Airlines
Oct 8
PWM7:25 pmPortland
8h 30m
1 stop
SFO12:55 amSan Francisco
Oct 12
SFO5:15 amSan Francisco
9h 27m
1 stop
PWM5:42 pmPortland
$269
Find similar
United Airlines
Oct 15
PWM7:25 pmPortland
8h 30m
1 stop
SFO12:55 amSan Francisco
Oct 22
SFO1:02 pmSan Francisco
7h 57m
1 stop
PWM11:59 pmPortland
$280
Find similar
United Airlines
Nov 7
PWM7:22 pmPortland
8h 53m
1 stop
SFO1:15 amSan Francisco
Nov 11
SFO9:20 pmSan Francisco
9h 44m
1 stop
PWM10:04 amPortland
$311
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 September 16, 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

Fri 10/31

1:14 pm-7:08 pm

1 stop8h 54m

San Francisco

Sat 11/8

8:45 am-10:32 pm

1 stop10h 47m

$239

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 10/31

2:40 pm-7:50 pm

1 stop8h 10m

San Francisco

Sat 11/8

6:25 am-9:55 pm

2 stops12h 30m

$244

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 10/31

5:25 am-12:10 pm

2 stops9h 45m

San Francisco

Sat 11/8

6:25 am-9:55 pm

2 stops12h 30m

$249

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 11/5

3:52 pm-10:05 pm

1 stop9h 13m

San Francisco

Tue 11/11

9:00 am-9:35 pm

1 stop9h 35m

$251

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 11/5

3:52 pm-10:05 pm

1 stop9h 13m

San Francisco

Tue 11/11

7:10 am-9:35 pm

2 stops11h 25m

$256

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 11/12

12:45 pm-10:30 pm

2 stops12h 45m

San Francisco

Wed 11/19

8:20 am-10:15 pm

2 stops10h 55m

$261

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 10/8

7:25 pm-12:55 am

1 stop8h 30m

San Francisco

Sun 10/12

5:15 am-5:42 pm

1 stop9h 27m

$269

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 11/1

1:27 pm-10:30 pm

1 stop12h 03m

San Francisco

Sat 11/8

5:55 am-4:03 pm

1 stop7h 08m

$277

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 10/15

7:25 pm-12:55 am

1 stop8h 30m

San Francisco

Wed 10/22

1:02 pm-11:59 pm

1 stop7h 57m

$280

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 10/29

4:48 pm-10:35 pm

1 stop8h 47m

San Francisco

Sun 11/2

5:55 am-4:03 pm

1 stop7h 08m

$282

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 February is also cheap. Prices for this month can be found on momondo for an average of $376.

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 Friday when prices can be found for as low as $431. The most expensive day to fly to San Francisco is Monday, with ticket prices averaging around $740.

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 $422. Flights in the morning are often more expensive with an average ticket price of $509.

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 $445 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 $328 on momondo.

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

You could potentially save up to 9% 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 September 2025, prices for Portland, Maine to San Francisco flights are approximately 8% 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

Direct flights

None
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 06m.

  • 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 $232Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $272Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
DeltaPriceFrom $276Free CancellationRating
7.9
7,957 reviews
Search Delta flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
JetBluePriceFrom $320Free CancellationRating
7.2
2,914 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
Calistoga
Bodega Bay
Roseville
Hayward
Big Sur
Santa Clara
Daly City
Fremont
Berkeley
Half Moon Bay
Walnut Creek
Vallejo
Redwood City
Salinas
South San Francisco
Fairfield

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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