What are the cheapest airlines flying from Portland, Maine to San Francisco round-trip?

American Airlines, at $261, was found to be the cheapest airline from Portland, Maine to San Francisco.Alternate airlines to your destination round-trip include United Airlines and Delta. Users have found that American Airlines is 43% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Portland, Maine to San Francisco one-way?

The cheapest airlines for a one-way flight from Portland, Maine to San Francisco are Frontier ($106), American Airlines ($109), and Delta ($139).

What are the most popular airlines that fly from Portland, Maine to San Francisco?

When booking a flight from Portland, Maine to San Francisco, you may want to consider flying on American Airlines, JetBlue or Delta as they are the most popular for this route.

What is the cheapest day to fly round-trip from Portland, Maine to San Francisco?

Users have found that flying from Portland, Maine to San Francisco on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Portland, Maine to San Francisco?

To save on the cost of your flight from Portland, Maine to San Francisco, book at least 51 days before your planned departure. Booking around this time can save you about 177% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $466 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $688.

What is the cheapest month to fly from Portland, Maine to San Francisco?

February can be a great time to fly to San Francisco from Portland, Maine with a flight ticket averaging about $466. Cheapflights users have found deals in the month of February for as cheap as $253. The most expensive prices can be found in the month of June.

Most accurate provider : When it comes to deals on Portland, Maine-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Portland, Maine-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Portland to San Francisco that include hotel bookings?

Yes. In addition to deals on Portland to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Portland to San Francisco?

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.

Can I find deals for business class flights from Portland to San Francisco?

Yes. Cheapflights offers flight deals from Portland to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$106+ Flights from Portland, ME to San Francisco

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Find cheap flights from Portland to San Francisco 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.

Cheapflights Tip: The best prices from Portland to San Francisco are usually found in February or September, booked 50 days in advance, depart on a Friday or Wednesday and return on a Tuesday

Cheap flight deals from Portland to San Francisco

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$261 (American Airlines)
One-way from	$106 (Mytrip)
Popular in	June
Cheapest in	February
Average price	$557

Provider with most accurate pricing for Portland-San Francisco flight deals.

Search Deals

Provider most trusted by Cheapflights users for Portland-San Francisco flights.

Search Deals

From Portland to San Francisco

Search Deals

One-way flight from Portland to San Francisco

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($67 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Find flight deals from Portland to San Francisco

Cheapest flights from Portland to San Francisco
Explore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 14, 2025.

Tue 6/104:02 pmPWM - SFO

2 stops10h 50mAmerican Airlines

Tue 6/179:15 amSFO - PWM

2 stops10h 48mAmerican Airlines

Deal found 4/14

$261

Fri 8/157:15 pmPWM - SFO

1 stop8h 42mUnited Airlines

Sat 8/169:10 pmSFO - PWM

1 stop10h 00mUnited Airlines

Deal found 4/14

$264

Tue 6/1011:44 amPWM - SFO

1 stop8h 34mDelta

Tue 6/176:15 amSFO - PWM

1 stop8h 46mDelta

Deal found 4/14

$277

Wed 9/101:50 pmPWM - SFO

2 stops10h 50mSouthwest

Wed 9/179:05 pmSFO - PWM

1 stop9h 45mSouthwest

Deal found 4/14

$300

Fri 4/185:53 pmPWM - SFO

1 stop30h 37mFrontier

Sun 4/2010:30 pmSFO - PWM

1 stop12h 40mFrontier

Deal found 4/13

$330

Thu 10/212:16 pmPWM - SFO

1 stop7h 59mSun Country Air

Wed 10/81:03 pmSFO - PWM

1 stop19h 34mSun Country Air

Deal found 4/12

$335

Fri 5/23:20 pmPWM - SFO

1 stop11h 51mJetBlue

Mon 5/58:00 amSFO - PWM

1 stop10h 57mJetBlue

Deal found 4/13

$407

Fri 5/26:16 pmPWM - SFO

2 stops20h 23mMultiple Airlines

Wed 5/79:59 pmSFO - PWM

1 stop19h 30mMultiple Airlines

Deal found 4/13

$422

Wed 4/302:33 pmPWM - SFO

1 stop10h 10mAlaska Airlines

Wed 5/710:35 amSFO - PWM

2 stops10h 20mAlaska Airlines

Deal found 4/13

$594

Fri 11/146:05 pmPWM - SFO

2 stops20h 49mBreeze Airways

Mon 11/176:02 pmSFO - PWM

3 stops37h 34mBreeze Airways

Deal found 4/14

$784

Best flights from Portland to San Francisco
Discover carefully curated flight deals from Portland to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 14, 2025.

Tue 6/104:02 pmPWM - SFO

2 stops10h 50mAmerican Airlines

Tue 6/179:15 amSFO - PWM

2 stops10h 48mAmerican Airlines

Deal found 4/14

$261

Fri 8/157:15 pmPWM - SFO

1 stop8h 42mUnited Airlines

Sat 8/169:10 pmSFO - PWM

1 stop10h 00mUnited Airlines

Deal found 4/14

$264

Tue 6/106:00 amPWM - SFO

1 stop8h 43mDelta

Sun 6/1512:49 amSFO - PWM

1 stop6h 50mDelta

Deal found 4/14

$277

Wed 9/101:50 pmPWM - SFO

2 stops10h 50mSouthwest

Wed 9/179:05 pmSFO - PWM

1 stop9h 45mSouthwest

Deal found 4/14

$300

Thu 10/212:16 pmPWM - SFO

1 stop7h 59mSun Country Air

Wed 10/81:03 pmSFO - PWM

1 stop19h 34mSun Country Air

Deal found 4/12

$335

Fri 5/23:20 pmPWM - SFO

1 stop11h 51mJetBlue

Mon 5/58:00 amSFO - PWM

1 stop10h 57mJetBlue

Deal found 4/13

$407

Fri 5/26:16 pmPWM - SFO

2 stops20h 23mMultiple Airlines

Wed 5/79:59 pmSFO - PWM

1 stop19h 30mMultiple Airlines

Deal found 4/13

$422

Wed 4/302:33 pmPWM - SFO

1 stop10h 10mAlaska Airlines

Wed 5/710:35 amSFO - PWM

2 stops10h 20mAlaska Airlines

Deal found 4/13

$594

Mon 9/86:05 pmPWM - SFO

2 stops21h 00mBreeze Airways

Tue 9/1612:50 pmSFO - PWM

3 stops46h 40mBreeze Airways

Deal found 4/13

$787

Last-minute flights from Portland to San Francisco
Discover last-minute flight deals from Portland to San Francisco. Data last updated April 14, 2025 and is based on user searches.

Mon 4/213:11 pmPWM - SFO

1 stop25h 08mFrontier

Wed 4/3010:07 pmSFO - PWM

1 stop19h 22mFrontier

Deal found 4/12

$290

Mon 4/211:00 pmPWM - SFO

2 stops12h 38mDelta

Wed 4/3011:40 amSFO - PWM

1 stop10h 02mDelta

Deal found 4/12

$450

Mon 4/216:00 amPWM - SFO

1 stop9h 17mAmerican Airlines

Tue 4/2912:47 amSFO - PWM

2 stops11h 31mAmerican Airlines

Deal found 4/12

$516

Mon 4/2111:45 amPWM - SFO

1 stop10h 21mUnited Airlines

Tue 4/2912:08 amSFO - PWM

1 stop18h 27mUnited Airlines

Deal found 4/12

$679

Mon 4/2812:45 pmPWM - SFO

1 stop9h 21mUnited Airlines

Fri 5/29:10 pmSFO - PWM

1 stop9h 53mUnited Airlines

Deal found 4/13

$387

Wed 4/302:33 pmPWM - SFO

1 stop10h 10mAlaska Airlines

Wed 5/710:35 amSFO - PWM

2 stops10h 20mAlaska Airlines

Deal found 4/13

$594

Fri 5/23:20 pmPWM - SFO

1 stop11h 51mJetBlue

Mon 5/58:00 amSFO - PWM

1 stop10h 57mJetBlue

Deal found 4/13

$407

Fri 5/26:16 pmPWM - SFO

2 stops20h 23mMultiple Airlines

Wed 5/79:59 pmSFO - PWM

1 stop19h 30mMultiple Airlines

Deal found 4/13

$422

Tue 5/62:05 pmPWM - SFO

2 stops11h 28mAmerican Airlines

Tue 5/1311:49 pmSFO - PWM

2 stops10h 33mAmerican Airlines

Deal found 4/14

$261

Fri 5/91:30 pmPWM - SFO

1 stop9h 39mDelta

Tue 5/2011:43 amSFO - PWM

1 stop9h 16mDelta

Deal found 4/14

$277

Mon 5/1211:40 amPWM - SFO

2 stops12h 25mSouthwest

Tue 6/35:00 pmSFO - PWM

2 stops15h 30mSouthwest

Deal found 4/13

$401

Mon 5/122:52 pmPWM - SFO

3 stops47h 47mBreeze Airways

Tue 6/312:33 pmSFO - PWM

2 stops28h 07mBreeze Airways

Deal found 4/13

$825

One-way flights from Portland to San Francisco
Search for one-way flight options from Portland to San Francisco. Find affordable one-way fares based on user searches. Data last updated April 14, 2025.

Fri 5/99:30 pmPWM - SFO

1 stop18h 45mFrontier

Deal found 4/14

$106

Fri 7/46:00 amPWM - SFO

1 stop8h 19mAmerican Airlines

Deal found 4/14

$109

Fri 5/91:30 pmPWM - SFO

1 stop9h 39mDelta

Deal found 4/14

$139

Mon 7/217:15 pmPWM - SFO

1 stop8h 42mUnited Airlines

Deal found 4/13

$169

Fri 5/23:20 pmPWM - SFO

1 stop11h 51mJetBlue

Deal found 4/13

$214

Mon 7/215:40 amPWM - SFO

2 stops10h 35mSouthwest

Deal found 4/13

$229

Sat 8/912:32 pmPWM - SFO

1 stop22h 36mSun Country Air

Deal found 4/13

$248

Fri 5/232:52 pmPWM - SFO

3 stops29h 21mMultiple Airlines

Deal found 4/13

$345

Fri 5/97:18 pmPWM - SFO

3 stops43h 30mBreeze Airways

Deal found 4/14

$562

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 6/10

4:02 pm-11:52 pm

2 stops10h 50m

San Francisco

Tue 6/17

9:15 am-11:03 pm

2 stops10h 48m

$261

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 8/15

7:15 pm-12:57 am

1 stop8h 42m

San Francisco

Sat 8/16

9:10 pm-10:10 am

1 stop10h 00m

$264

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Tue 6/10

11:44 am-5:18 pm

1 stop8h 34m

San Francisco

Tue 6/17

6:15 am-6:01 pm

1 stop8h 46m

$277

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 9/10

1:50 pm-9:40 pm

2 stops10h 50m

San Francisco

Wed 9/17

9:05 pm-9:50 am

1 stop9h 45m

$300

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Thu 10/2

12:16 pm-5:15 pm

1 stop7h 59m

San Francisco

Wed 10/8

1:03 pm-11:37 am

1 stop19h 34m

$335

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 5/2

3:20 pm-12:11 am

1 stop11h 51m

San Francisco

Mon 5/5

8:00 am-9:57 pm

1 stop10h 57m

$407

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 5/2

6:16 pm-11:39 am

2 stops20h 23m

San Francisco

Wed 5/7

9:59 pm-8:29 pm

1 stop19h 30m

$422

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Wed 4/30

2:33 pm-9:43 pm

1 stop10h 10m

San Francisco

Wed 5/7

10:35 am-11:55 pm

2 stops10h 20m

$594

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Mon 9/8

6:05 pm-12:05 pm

2 stops21h 00m

San Francisco

Tue 9/16

12:50 pm-2:30 pm

3 stops46h 40m

$787

PortlandSan Francisco

PWM - SFO

PWMSFO

Portland

Fri 5/9

9:30 pm-1:15 pm

1 stop18h 45m

$106

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 18 results

Compare providers for flights from Portland to San Francisco

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to San Francisco in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Portland, Maine-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Portland, Maine-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco 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

How far ahead should I book a flight from Portland, Maine to San Francisco?

The best time to book flights from Portland, Maine to San Francisco is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland, Maine to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Portland, Maine to San Francisco (average of $276). Flying from Portland, Maine to San Francisco in June is currently the most expensive (average of $393). 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.

What is the cheapest time of day to fly from PWM to SFO?

Unlike in the morning, when flights are generally more expensive, you can save up to 18% on flights from Portland, Maine to San Francisco by exploring options for tickets in the evening.

What is the cheapest day to fly from Portland, Maine to San Francisco?

Travelers seeking maximum savings on their Portland, Maine to San Francisco flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in San Francisco by month

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

Read reviews from past customers who have flown Breeze Airways, Alaska Airlines and Southwest from Portland to San Francisco. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Breeze Airways

8.1

Very good

158 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Alaska Airlines

8.0

Very good

9,871 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Southwest

8.0

Very good

4,278 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Delta

8.0

Very good

7,917 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

United Airlines

7.4

Good

8,656 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Related info for your journey

What are the cheapest airlines flying from Portland, Maine to San Francisco round-trip?
American Airlines, at $261, was found to be the cheapest airline from Portland, Maine to San Francisco.Alternate airlines to your destination round-trip include United Airlines and Delta. Users have found that American Airlines is 43% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Portland, Maine to San Francisco one-way?
The cheapest airlines for a one-way flight from Portland, Maine to San Francisco are Frontier ($106), American Airlines ($109), and Delta ($139).
Can I find deals for flights from Portland to San Francisco that include hotel bookings?
Yes. In addition to deals on Portland to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to San Francisco?
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.
Can I find deals for business class flights from Portland to San Francisco?
Yes. Cheapflights offers flight deals from Portland to San Francisco 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?
Currently, January is the cheapest month in which you can book a flight from Portland, Maine to San Francisco (average of $276). Flying from Portland, Maine to San Francisco in June is currently the most expensive (average of $393). 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

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Top 4 airlines flying from Portland to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$216	Average$439	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$256	Average$412	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$276	Average$502	FlexibilityNo cancel fee	On-time69%
JetBlue	Cheapest$320	Average$495	FlexibilityNo cancel fee	On-time62%

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$106+ Cheap flights from Portland, ME to San Francisco (PWM - SFO)

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Portland to San Francisco are usually found in February or September, booked 50 days in advance, depart on a Friday or Wednesday and return on a Tuesday

Cheap flight deals from Portland to San Francisco

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portland to San Francisco

Cheapest flights from Portland to San FranciscoExplore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 14, 2025.

Explore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 14, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to San Francisco that are best for you.

Compare providers for flights from Portland to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to San Francisco in April.

Best time to book a flight from Portland to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Portland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portland to San Francisco

How far ahead should I book a flight from Portland, Maine to San Francisco?

Use this chart to determine the optimal time to book a round-trip flight from Portland to San Francisco. Price data was last updated on April 11, 2025.

What is the cheapest month to book a flight from Portland, Maine to San Francisco?

What is the cheapest time of day to fly from PWM to SFO?

Find hourly flight availability from Portland to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 14, 2025.

What is the cheapest day to fly from Portland, Maine to San Francisco?

Use this chart to determine the cheapest time to fly round-trip from Portland to San Francisco. Price data was last updated on December 16, 2024.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

Reviews of airlines servicing San Francisco

Read reviews from past customers who have flown Breeze Airways, Alaska Airlines and Southwest from Portland to San Francisco. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portland to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Portland, Maine to San Francisco round-trip?

What are the cheapest airlines to fly from Portland, Maine to San Francisco one-way?

Can I find deals for flights from Portland to San Francisco that include hotel bookings?

How can I find direct flights from Portland to San Francisco?

Can I find deals for business class flights from Portland to San Francisco?

What is the cheapest month to book a flight from Portland, Maine to San Francisco?

Traveling to a place near Portland?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portland to San Francisco

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

Top 4 airlines flying from Portland to San Francisco

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Cheapest flights from Portland to San Francisco
Explore the most affordable flight options available from Portland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 14, 2025.