$139+ 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 8/21. 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
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 October, booked 55 days in advance, depart on a Friday or Wednesday and return on a Tuesday
Cheap flight deals from Portland to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated junio 12, 2025.
Round-trip from | $251 (American Airlines) |
|---|---|
One-way from | $139 (United Airlines) |
Popular in | August |
Cheapest in | February |
Average price | $386 |
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 junio 12, 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 junio 12, 2025.
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This JetBlue deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Sun Country Air deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Portland 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, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
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
sáb. 9/6
9:18 am-3:09 pm
1 stop8h 51m
San Francisco
sáb. 9/13
11:52 pm-1:53 pm
1 stop11h 01m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
mar. 7/1
12:55 pm-6:47 pm
1 stop8h 52m
San Francisco
lun. 7/7
12:50 am-10:35 am
1 stop6h 45m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
vie. 9/5
7:30 am-4:54 pm
1 stop12h 24m
San Francisco
lun. 9/8
8:00 am-10:02 pm
1 stop11h 02m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
mar. 7/1
5:30 am-5:50 pm
1 stop15h 20m
San Francisco
lun. 7/7
9:00 pm-9:45 am
1 stop9h 45m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
mar. 7/8
6:01 am-11:29 am
1 stop8h 28m
San Francisco
vie. 7/11
11:40 am-11:14 pm
1 stop8h 34m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
lun. 7/14
12:46 pm-11:05 am
1 stop25h 19m
San Francisco
sáb. 7/19
6:14 pm-11:45 am
1 stop14h 31m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
sáb. 8/23
8:07 pm-11:48 am
2 stops18h 41m
San Francisco
sáb. 8/30
12:24 pm-2:32 pm
3 stops23h 08m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
mié. 8/20
10:23 am-5:12 pm
2 stops33h 49m
San Francisco
sáb. 8/30
12:24 pm-8:12 pm
3 stops28h 48m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
jue. 8/21
6:14 am-11:32 am
1 stop8h 18m
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
mié. 8/6
6:00 am-2:50 pm
2 stops11h 50m
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 June 9, 2025.
The best time to book flights from Portland, Maine to San Francisco is 55 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 $364). 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?
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 junio 12, 2025.
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?
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.
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
Plan your trip to San Francisco by taking into account the average rainfall totals 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
Plan your trip to San Francisco by taking into account the average temperature totals 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
Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated junio 12, 2025.
Read reviews from past customers who have flown Breeze Airways, Southwest and Delta from Portland to San Francisco. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Dena,Dec 2024
LAS - BDL
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Dena,Dec 2024
LAS - BDL
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Dena,Dec 2024
LAS - BDL
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Dena,Dec 2024
LAS - BDL
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Dena,Dec 2024
LAS - BDL
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Dena,Dec 2024
LAS - BDL
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.
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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
Discover the top 4 airlines that operate flights from Portland to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$216 | Average$397 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$386 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$276 | Average$489 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$320 | Average$535 | FlexibilityNo cancel fee | On-time62% |