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Cheap flights from Portland, Maine to San Francisco from $109

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 8/30. 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

American Airlines Logo
3:53 pm - 10:12 pmPWM-SFO
9h 19m1 stop
American Airlines Logo
11:14 pm - 12:07 pmSFO-PWM
9h 53m1 stop
$251American Airlines
Find Deal
Wed, Nov 5 - Tue, Nov 11
American Airlines Logo
2:42 pm - 10:45 pmPWM-SFO
11h 03m2 stops
American Airlines Logo
11:25 pm - 11:41 amSFO-PWM
9h 16m1 stop
$252American Airlines
Find Deal
Mon, Oct 27 - Fri, Oct 31
American Airlines Logo
6:00 am - 3:09 pmPWM-SFO
12h 09m2 stops
American Airlines Logo
11:25 pm - 11:49 amSFO-PWM
9h 24m1 stop
$256American Airlines
Find Deal
Sat, Sep 6 - Sat, Sep 13
Delta Logo
6:00 am - 11:38 amPWM-SFO
8h 38m1 stop
Delta Logo
11:57 pm - 12:29 pmSFO-PWM
9h 32m1 stop
$277Delta
Find Deal
Sat, Sep 6 - Sun, Sep 14
Delta Logo
12:40 pm - 5:47 pmPWM-SFO
8h 07m1 stop
Delta Logo
12:45 am - 1:00 pmSFO-PWM
9h 15m2 stops
$282Delta
Find Deal
Fri, Sep 19 - Mon, Sep 22
United Airlines Logo
8:00 am - 1:50 pmPWM-SFO
8h 50m1 stop
United Airlines Logo
1:02 pm - 11:59 pmSFO-PWM
7h 57m1 stop
$305United Airlines
Find Deal
Tue, Sep 30 - Thu, Oct 2
United Airlines Logo
6:00 am - 11:20 amPWM-SFO
8h 20m1 stop
United Airlines Logo
9:00 pm - 9:11 amSFO-PWM
9h 11m1 stop
$313United Airlines
Find Deal
Sat, Sep 27 - Sat, Sep 27
JetBlue Logo
2:17 pm - 11:42 pmPWM-SFO
12h 25m1 stop
JetBlue Logo
10:30 pm - 1:22 pmSFO-PWM
11h 52m1 stop
$330JetBlue
Find Deal
Mon, Sep 29 - Mon, Oct 6
JetBlue Logo
2:17 pm - 11:43 pmPWM-SFO
12h 26m1 stop
JetBlue Logo
10:30 pm - 1:22 pmSFO-PWM
11h 52m1 stop
$370JetBlue
Find Deal
Tue, Oct 7 - Fri, Oct 10
Southwest Logo
5:35 am - 3:40 pmPWM-SFO
13h 05m1 stop
Southwest Logo
6:20 am - 11:20 pmSFO-PWM
14h 00m2 stops
$411Southwest
Find Deal
Sun, Sep 7 - Mon, Sep 15

American Airlines flights from Portland, Maine to San Francisco

Our best American Airlines deals on Portland, Maine to San Francisco flight tickets
American Airlines
Nov 5
PWM3:53 pmPortland
9h 19m
1 stop
SFO10:12 pmSan Francisco
Nov 11
SFO11:14 pmSan Francisco
9h 53m
1 stop
PWM12:07 pmPortland
$251
Find similar
American Airlines
Oct 27
PWM2:42 pmPortland
11h 03m
2 stops
SFO10:45 pmSan Francisco
Oct 31
SFO11:25 pmSan Francisco
9h 16m
1 stop
PWM11:41 amPortland
$252
Find similar
American Airlines
Sep 6
PWM6:00 amPortland
12h 09m
2 stops
SFO3:09 pmSan Francisco
Sep 13
SFO11:25 pmSan Francisco
9h 24m
1 stop
PWM11:49 amPortland
$256
Find similar

Delta flights from Portland, Maine to San Francisco

Our best Delta deals on Portland, Maine to San Francisco flight tickets
Delta
Sep 6
PWM6:00 amPortland
8h 38m
1 stop
SFO11:38 amSan Francisco
Sep 14
SFO11:57 pmSan Francisco
9h 32m
1 stop
PWM12:29 pmPortland
$277
Find similar
Delta
Sep 19
PWM12:40 pmPortland
8h 07m
1 stop
SFO5:47 pmSan Francisco
Sep 22
SFO12:45 amSan Francisco
9h 15m
2 stops
PWM1:00 pmPortland
$282
Find similar
Delta
Aug 28
PWM11:48 amPortland
9h 00m
1 stop
SFO5:48 pmSan Francisco
Aug 31
SFO12:35 amSan Francisco
7h 07m
1 stop
PWM10:42 amPortland
$285
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 July 31, 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

Wed 11/5

3:53 pm-10:12 pm

1 stop9h 19m

San Francisco

Tue 11/11

11:14 pm-12:07 pm

1 stop9h 53m

$251

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Mon 10/27

2:42 pm-10:45 pm

2 stops11h 03m

San Francisco

Fri 10/31

11:25 pm-11:41 am

1 stop9h 16m

$252

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 9/6

6:00 am-3:09 pm

2 stops12h 09m

San Francisco

Sat 9/13

11:25 pm-11:49 am

1 stop9h 24m

$256

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 9/6

6:00 am-11:38 am

1 stop8h 38m

San Francisco

Sun 9/14

11:57 pm-12:29 pm

1 stop9h 32m

$277

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 9/19

12:40 pm-5:47 pm

1 stop8h 07m

San Francisco

Mon 9/22

12:45 am-1:00 pm

2 stops9h 15m

$282

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 9/30

8:00 am-1:50 pm

1 stop8h 50m

San Francisco

Thu 10/2

1:02 pm-11:59 pm

1 stop7h 57m

$305

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sat 9/27

6:00 am-11:20 am

1 stop8h 20m

San Francisco

Sat 9/27

9:00 pm-9:11 am

1 stop9h 11m

$313

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Mon 9/29

2:17 pm-11:42 pm

1 stop12h 25m

San Francisco

Mon 10/6

10:30 pm-1:22 pm

1 stop11h 52m

$330

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 10/7

2:17 pm-11:43 pm

1 stop12h 26m

San Francisco

Fri 10/10

10:30 pm-1:22 pm

1 stop11h 52m

$370

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Sun 9/7

5:35 am-3:40 pm

1 stop13h 05m

San Francisco

Mon 9/15

6:20 am-11:20 pm

2 stops14h 00m

$411

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 $362.

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 $437 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 $345 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 July 2025, prices for Portland, Maine to San Francisco flights are approximately 38% 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

Best Price Found

$109

Fastest flight time

7h 47m

Direct flights

None

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from Portland, Maine in the past 72 hours is $109. The best round-trip flight deal from Portland, Maine to San Francisco found on momondo in the last 72 hours is $251.
The fastest flight from Portland, Maine to San Francisco takes 7h 47m
There are no direct flights from Portland, Maine to San Francisco. Popular non-direct route for this connection is Portland Airport - San Francisco Airport.
There is 1 airport near San Francisco: 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 7h 47m.

  • 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 $218Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $266Free CancellationRating
8.0
7,981 reviews
Search Delta flights
SouthwestPriceFrom $272Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
8,900 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
Calistoga
Hayward
Bodega Bay
Sonoma
Roseville
Santa Clara
Big Sur
Daly City
Berkeley
Walnut Creek
Fremont
Half Moon Bay
South San Francisco
Redwood City
Vallejo
Sunnyvale
Pacific Grove

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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