$184+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SFO
Jul 8 — Jul 151
Round-trip
1 adult, Economy
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Find cheap flights from Portland to San Francisco with Cheapflights
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Portland to San Francisco
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Best
Last-minute
One-way
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 June 8, 2026.
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 June 8, 2026.
This Southwest deal was found by Cheapflights users on 6/8. 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.
Tue 9/225:45 am
PWM
- SFO
1 stop8h 50m
Southwest
Fri 9/2510:30 pm
SFO
- PWM
1 stop8h 25m
Southwest
Deal found 6/8![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 6/3. 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.
Tue 9/111:50 am
PWM
- SFO
1 stop8h 28m
Delta
Tue 9/156:00 am
SFO
- PWM
1 stop6h 55m
Delta
Deal found 6/3![Delta logo]()
$305
This Southwest deal was found by Cheapflights users on 6/5. 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.
Tue 9/15:45 am
PWM
- SFO
2 stops11h 20m
Southwest
Wed 9/910:30 pm
SFO
- PWM
1 stop8h 20m
Southwest
Deal found 6/5![Southwest logo]()
$310
This JetBlue deal was found by Cheapflights users on 6/7. 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.
Sat 10/316:30 am
PWM
- SFO
1 stop10h 08m
JetBlue
Tue 11/312:15 pm
SFO
- PWM
1 stop8h 28m
JetBlue
Deal found 6/7![JetBlue logo]()
$318
This Southwest deal was found by Cheapflights users on 6/5. 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.
Tue 8/257:45 am
PWM
- SFO
1 stop8h 10m
Southwest
Sat 8/2910:30 pm
SFO
- PWM
1 stop9h 05m
Southwest
Deal found 6/5![Southwest logo]()
$321
This Delta deal was found by Cheapflights users on 6/3. 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.
Wed 9/96:30 am
PWM
- SFO
1 stop11h 47m
Delta
Mon 9/1411:35 am
SFO
- PWM
1 stop9h 24m
Delta
Deal found 6/3![Delta logo]()
$337
This Southwest deal was found by Cheapflights users on 6/4. 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.
Mon 10/265:30 am
PWM
- SFO
1 stop8h 45m
Southwest
Sat 10/319:40 pm
SFO
- PWM
1 stop10h 50m
Southwest
Deal found 6/4![Southwest logo]()
$342
Best flights from Portland to San FranciscoDiscover 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 June 8, 2026.
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 June 8, 2026.
This Southwest deal was found by Cheapflights users on 6/5. 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.
Tue 8/257:45 am
PWM
- SFO
1 stop8h 10m
Southwest
Sat 8/2911:05 pm
SFO
- PWM
2 stops10h 40m
Southwest
Deal found 6/5![Southwest logo]()
$326
This Delta deal was found by Cheapflights users on 6/3. 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.
Wed 7/86:00 am
PWM
- SFO
1 stop9h 19m
Delta
Mon 7/1311:59 pm
SFO
- PWM
1 stop10h 01m
Delta
Deal found 6/3![Delta logo]()
$384
This Southwest deal was found by Cheapflights users on 6/3. 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.
Thu 8/202:10 pm
PWM
- SFO
1 stop10h 45m
Southwest
Wed 8/267:40 am
SFO
- PWM
2 stops10h 30m
Southwest
Deal found 6/3![Southwest logo]()
$358
This Southwest deal was found by Cheapflights users on 6/7. 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.
Wed 8/195:45 am
PWM
- SFO
1 stop8h 50m
Southwest
Tue 8/2510:30 pm
SFO
- PWM
1 stop8h 25m
Southwest
Deal found 6/7![Southwest logo]()
$369
This Southwest deal was found by Cheapflights users on 6/7. 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.
Sat 8/225:40 am
PWM
- SFO
2 stops13h 10m
Southwest
Sat 8/2910:30 pm
SFO
- PWM
1 stop9h 05m
Southwest
Deal found 6/7![Southwest logo]()
$374
This Southwest deal was found by Cheapflights users on 6/5. 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.
Wed 12/25:10 am
PWM
- SFO
2 stops11h 50m
Southwest
Tue 12/87:15 pm
SFO
- PWM
2 stops11h 40m
Southwest
Deal found 6/5![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 6/7. 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.
Tue 7/75:30 am
PWM
- SFO
2 stops11h 10m
Southwest
Tue 7/145:30 am
SFO
- PWM
2 stops13h 05m
Southwest
Deal found 6/7![Southwest logo]()
$438
This Southwest deal was found by Cheapflights users on 6/3. 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.
Wed 7/85:30 am
PWM
- SFO
2 stops11h 10m
Southwest
Mon 7/135:50 am
SFO
- PWM
1 stop13h 25m
Southwest
Deal found 6/3![Southwest logo]()
$461
This Southwest deal was found by Cheapflights users on 6/4. 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.
Wed 7/155:30 am
PWM
- SFO
2 stops11h 10m
Southwest
Tue 7/215:30 am
SFO
- PWM
2 stops13h 05m
Southwest
Deal found 6/4![Southwest logo]()
$474
This Southwest deal was found by Cheapflights users on 6/8. 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.
Sat 7/410:35 am
PWM
- SFO
1 stop10h 05m
Southwest
Sat 7/1110:10 am
SFO
- PWM
2 stops10h 35m
Southwest
Deal found 6/8![Southwest logo]()
$513
Last-minute flights from Portland to San FranciscoDiscover last-minute flight deals from Portland to San Francisco. Data last updated June 8, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Francisco. Data last updated June 8, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/5. 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.
Thu 6/256:57 pm
PWM
- SFO
1 stop8h 48m
Delta
Mon 8/312:12 am
SFO
- PWM
1 stop7h 33m
Delta
Deal found 6/5![Delta logo]()
$382
This American Airlines deal was found by Cheapflights users on 6/4. 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.
Thu 6/256:54 pm
PWM
- SFO
1 stop9h 19m
American Airlines
Sun 7/56:04 am
SFO
- PWM
1 stop9h 48m
American Airlines
Deal found 6/4![American Airlines logo]()
$393
This American Airlines deal was found by Cheapflights users on 6/3. 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.
Tue 6/303:05 pm
PWM
- SFO
1 stop10h 38m
American Airlines
Mon 7/612:48 am
SFO
- PWM
1 stop10h 28m
American Airlines
Deal found 6/3![American Airlines logo]()
$305
This American Airlines deal was found by Cheapflights users on 6/5. 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.
Tue 6/305:36 pm
PWM
- SFO
1 stop10h 12m
American Airlines
Tue 7/712:48 am
SFO
- PWM
1 stop10h 28m
American Airlines
Deal found 6/5![American Airlines logo]()
$361
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Wed 7/17:16 pm
PWM
- SFO
1 stop8h 59m
United Airlines
Sat 7/49:30 pm
SFO
- PWM
1 stop9h 37m
United Airlines
Deal found 6/8![United Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Thu 7/26:00 am
PWM
- SFO
1 stop8h 38m
United Airlines
Wed 7/89:15 pm
SFO
- PWM
1 stop8h 56m
United Airlines
Deal found 6/5![United Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 6/4. 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.
Fri 7/32:56 pm
PWM
- SFO
1 stop8h 51m
American Airlines
Mon 7/612:48 am
SFO
- PWM
1 stop10h 28m
American Airlines
Deal found 6/4![American Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 6/3. 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.
Wed 7/86:00 am
PWM
- SFO
1 stop9h 19m
Delta
Mon 7/1311:59 pm
SFO
- PWM
1 stop10h 01m
Delta
Deal found 6/3![Delta logo]()
$384
This Southwest deal was found by Cheapflights users on 6/4. 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.
Wed 7/155:30 am
PWM
- SFO
2 stops11h 10m
Southwest
Tue 7/215:15 am
SFO
- PWM
1 stop13h 20m
Southwest
Deal found 6/4![Southwest logo]()
$415
One-way flights from Portland to San FranciscoSearch for one-way flight options from Portland to San Francisco. Find affordable one-way fares based on user searches. Data last updated June 8, 2026.
Search for one-way flight options from Portland to San Francisco. Find affordable one-way fares based on user searches. Data last updated June 8, 2026.
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Tue 7/215:00 pm
PWM
- SFO
1 stop10h 32m
United Airlines
Deal found 6/4![United Airlines logo]()
$184
This Southwest deal was found by Cheapflights users on 6/6. 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.
Sat 8/225:40 am
PWM
- SFO
1 stop8h 15m
Southwest
Deal found 6/6![Southwest logo]()
$185
This Southwest deal was found by Cheapflights users on 6/4. 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.
Tue 8/185:45 am
PWM
- SFO
2 stops11h 55m
Southwest
Deal found 6/4![Southwest logo]()
$190
This Delta deal was found by Cheapflights users on 6/3. 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.
Wed 7/86:00 am
PWM
- SFO
1 stop9h 19m
Delta
Deal found 6/3![Delta logo]()
$200
This Delta deal was found by Cheapflights users on 6/5. 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.
Wed 8/56:00 am
PWM
- SFO
1 stop9h 19m
Delta
Deal found 6/5![Delta logo]()
$205
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Wed 7/17:16 pm
PWM
- SFO
1 stop8h 59m
United Airlines
Deal found 6/4![United Airlines logo]()
$208
This American Airlines deal was found by Cheapflights users on 6/7. 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.
Thu 7/26:59 pm
PWM
- SFO
1 stop9h 00m
American Airlines
Deal found 6/7![American Airlines logo]()
$209
This Southwest deal was found by Cheapflights users on 6/6. 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.
Tue 8/115:45 am
PWM
- SFO
2 stops11h 20m
Southwest
Deal found 6/6![Southwest logo]()
$214
This United Airlines deal was found by Cheapflights users on 6/6. 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.
Sat 7/115:00 pm
PWM
- SFO
1 stop10h 32m
United Airlines
Deal found 6/6![United Airlines logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:00 am
PWM
- SFO
3 stops41h 38m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$246
This Sun Country Air deal was found by Cheapflights users on 6/7. 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.
Sat 6/2712:58 pm
PWM
- SFO
1 stop22h 15m
Sun Country Air
Deal found 6/7![Sun Country Air logo]()
$248
This Southwest deal was found by Cheapflights users on 6/4. 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.
Tue 7/215:30 am
PWM
- SFO
2 stops11h 10m
Southwest
Deal found 6/4![Southwest logo]()
$249
Find 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 June 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $266 (Southwest) |
One-way from | $184 (United Airlines) |
Popular in | June |
Cheapest in | September |
Average price | $573 |
Good round-trip deal | $723 or less |
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 June 8, 2026.
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
Cheapest round-trip
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Tue 8/25
7:45 am-12:55 pm
1 stop8h 10m
San Francisco
Sat 8/29
11:05 pm-12:45 pm
2 stops10h 40m
$326
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Thu 8/20
2:10 pm-9:55 pm
1 stop10h 45m
San Francisco
Wed 8/26
7:40 am-9:10 pm
2 stops10h 30m
$358
Quickest round-trip
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 8/19
5:45 am-11:35 am
1 stop8h 50m
San Francisco
Tue 8/25
10:30 pm-9:55 am
1 stop8h 25m
$369
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sat 8/22
5:40 am-3:50 pm
2 stops13h 10m
San Francisco
Sat 8/29
10:30 pm-10:35 am
1 stop9h 05m
$374
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 12/2
5:10 am-2:00 pm
2 stops11h 50m
San Francisco
Tue 12/8
7:15 pm-9:55 am
2 stops11h 40m
$379
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 7/8
6:00 am-12:19 pm
1 stop9h 19m
San Francisco
Mon 7/13
11:59 pm-1:00 pm
1 stop10h 01m
$384
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Tue 7/7
5:30 am-1:40 pm
2 stops11h 10m
San Francisco
Tue 7/14
5:30 am-9:35 pm
2 stops13h 05m
$438
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 7/8
5:30 am-1:40 pm
2 stops11h 10m
San Francisco
Mon 7/13
5:50 am-10:15 pm
1 stop13h 25m
$461
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 7/15
5:30 am-1:40 pm
2 stops11h 10m
San Francisco
Tue 7/21
5:30 am-9:35 pm
2 stops13h 05m
$474
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sat 7/4
10:35 am-5:40 pm
1 stop10h 05m
San Francisco
Sat 7/11
10:10 am-11:45 pm
2 stops10h 35m
$513
Showing 1-10 of 20 resultsSorted by cheapest first
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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 FlightHub the most. FlightHub 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.
PWM-SFO
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 59 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, September is the cheapest month in which you can book a flight from Portland, Maine to San Francisco (average of $383). Flying from Portland, Maine to San Francisco in June is currently the most expensive (average of $573). 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.
How much does it cost to fly round-trip from Portland, Maine to San Francisco?
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 June 8, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Portland to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
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.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Cruz
Santa Clara
Fairfield
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Cupertino
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Turlock
Sunnyvale
Vallejo
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Portland and San Francisco flights
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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 June 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$251 | Average$456 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$268 | Average$529 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$272 | Average$541 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$276 | Average$462 | FlexibilityNo cancel fee | On-timeN/A |