$185+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SFO
Jun 13 — Jun 201
Round-trip
1 adult, Economy
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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 May 14, 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 May 14, 2026.
This American Airlines deal was found by Cheapflights users on 5/9. 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.
Sat 5/306:54 pm
PWM
- SFO
1 stop9h 24m
American Airlines
Sun 5/315:00 am
SFO
- PWM
1 stop9h 07m
American Airlines
Deal found 5/9![American Airlines logo]()
$363
This American Airlines deal was found by Cheapflights users on 5/13. 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 6/255:36 pm
PWM
- SFO
1 stop10h 12m
American Airlines
Sun 7/56:00 am
SFO
- PWM
1 stop9h 34m
American Airlines
Deal found 5/13![American Airlines logo]()
$369
This American Airlines deal was found by Cheapflights users on 5/13. 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.
Wed 9/210:56 am
PWM
- SFO
2 stops11h 09m
American Airlines
Wed 9/165:51 am
SFO
- PWM
1 stop8h 04m
American Airlines
Deal found 5/13![American Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 5/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:16 am
PWM
- SFO
2 stops11h 50m
American Airlines
Tue 7/1411:20 pm
SFO
- PWM
2 stops10h 15m
American Airlines
Deal found 5/10![American Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 5/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/143:45 pm
PWM
- SFO
2 stops11h 25m
Southwest
Wed 7/225:15 am
SFO
- PWM
1 stop13h 15m
Southwest
Deal found 5/12![Southwest logo]()
$380
This American Airlines deal was found by Cheapflights users on 5/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/194:03 pm
PWM
- SFO
1 stop8h 55m
American Airlines
Sat 9/265:51 am
SFO
- PWM
1 stop8h 04m
American Airlines
Deal found 5/11![American Airlines logo]()
$389
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Thu 7/162:25 pm
PWM
- SFO
1 stop10h 42m
American Airlines
Sun 7/195:00 am
SFO
- PWM
1 stop9h 10m
American Airlines
Deal found 5/12![American Airlines logo]()
$393
This American Airlines deal was found by Cheapflights users on 5/13. 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.
Sat 9/262:54 pm
PWM
- SFO
1 stop10h 46m
American Airlines
Sat 10/311:25 pm
SFO
- PWM
2 stops9h 23m
American Airlines
Deal found 5/13![American Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 5/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:37 am
PWM
- SFO
2 stops11h 25m
American Airlines
Sat 8/2211:30 pm
SFO
- PWM
2 stops10h 10m
American Airlines
Deal found 5/10![American Airlines logo]()
$403
This Southwest deal was found by Cheapflights users on 5/10. 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.
Tue 7/75:30 am
PWM
- SFO
2 stops11h 10m
Southwest
Tue 7/285:15 am
SFO
- PWM
1 stop13h 15m
Southwest
Deal found 5/10![Southwest logo]()
$404
This Delta deal was found by Cheapflights users on 5/13. 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 6/212:50 pm
PWM
- SFO
1 stop7h 59m
Delta
Wed 2/109:00 pm
SFO
- PWM
1 stop9h 30m
Delta
Deal found 5/13![Delta logo]()
$409
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 May 14, 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 May 14, 2026.
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Fri 9/43:37 pm
PWM
- SFO
1 stop10h 18m
United Airlines
Mon 9/711:30 pm
SFO
- PWM
1 stop7h 42m
United Airlines
Deal found 5/11![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 5/12. 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 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
Thu 8/2711:05 pm
SFO
- PWM
1 stop11h 20m
Southwest
Deal found 5/12![Southwest logo]()
$374
This Delta deal was found by Cheapflights users on 5/13. 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.
Sat 6/272:51 pm
PWM
- SFO
1 stop9h 09m
Delta
Sat 7/45:40 am
SFO
- PWM
1 stop7h 15m
Delta
Deal found 5/13![Delta logo]()
$434
This American Airlines deal was found by Cheapflights users on 5/13. 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.
Wed 5/271:35 pm
PWM
- SFO
2 stops11h 55m
American Airlines
Sun 5/315:00 am
SFO
- PWM
1 stop9h 07m
American Airlines
Deal found 5/13![American Airlines logo]()
$454
This United Airlines deal was found by Cheapflights users on 5/9. 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 6/35:00 pm
PWM
- SFO
1 stop9h 02m
United Airlines
Sat 6/69:15 pm
SFO
- PWM
1 stop8h 59m
United Airlines
Deal found 5/9![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 5/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/143:45 pm
PWM
- SFO
2 stops11h 25m
Southwest
Wed 7/225:30 am
SFO
- PWM
2 stops13h 00m
Southwest
Deal found 5/12![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 5/9. 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 8/85:40 am
PWM
- SFO
2 stops13h 10m
Southwest
Sat 8/1511:05 pm
SFO
- PWM
1 stop14h 30m
Southwest
Deal found 5/9![Southwest logo]()
$439
This United Airlines deal was found by Cheapflights users on 5/13. 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 6/66:00 am
PWM
- SFO
1 stop8h 44m
United Airlines
Sat 6/139:30 pm
SFO
- PWM
1 stop9h 37m
United Airlines
Deal found 5/13![United Airlines logo]()
$463
This United Airlines deal was found by Cheapflights users on 5/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/273:30 pm
PWM
- SFO
1 stop11h 35m
United Airlines
Fri 7/312:50 am
SFO
- PWM
1 stop10h 41m
United Airlines
Deal found 5/10![United Airlines logo]()
$479
This Southwest deal was found by Cheapflights users on 5/9. 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 8/65:55 am
PWM
- SFO
1 stop10h 05m
Southwest
Thu 8/1311:05 pm
SFO
- PWM
1 stop11h 20m
Southwest
Deal found 5/9![Southwest logo]()
$492
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Mon 6/87:16 pm
PWM
- SFO
1 stop8h 59m
United Airlines
Sun 6/1411:59 pm
SFO
- PWM
1 stop10h 26m
United Airlines
Deal found 5/9![United Airlines logo]()
$479
This United Airlines deal was found by Cheapflights users on 5/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/289:45 am
PWM
- SFO
2 stops12h 11m
United Airlines
Sat 10/3110:55 pm
SFO
- PWM
1 stop9h 49m
United Airlines
Deal found 5/10![United Airlines logo]()
$484
Last-minute flights from Portland to San FranciscoDiscover last-minute flight deals from Portland to San Francisco. Data last updated May 14, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Francisco. Data last updated May 14, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Wed 5/272:24 pm
PWM
- SFO
1 stop11h 25m
American Airlines
Sun 5/315:00 am
SFO
- PWM
1 stop9h 07m
American Airlines
Deal found 5/12![American Airlines logo]()
$449
This American Airlines deal was found by Cheapflights users on 5/9. 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.
Sat 5/306:54 pm
PWM
- SFO
1 stop9h 24m
American Airlines
Sun 5/315:00 am
SFO
- PWM
1 stop9h 07m
American Airlines
Deal found 5/9![American Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 5/13. 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 6/22:05 pm
PWM
- SFO
1 stop9h 59m
Delta
Sun 2/79:00 pm
SFO
- PWM
1 stop9h 30m
Delta
Deal found 5/13![Delta logo]()
$409
This American Airlines deal was found by Cheapflights users on 5/13. 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 6/26:00 am
PWM
- SFO
2 stops12h 03m
American Airlines
Mon 2/812:17 am
SFO
- PWM
2 stops12h 14m
American Airlines
Deal found 5/13![American Airlines logo]()
$419
This American Airlines deal was found by Cheapflights users on 5/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:36 pm
PWM
- SFO
1 stop10h 12m
American Airlines
Tue 7/1411:20 pm
SFO
- PWM
2 stops10h 15m
American Airlines
Deal found 5/10![American Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 5/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:30 am
PWM
- SFO
2 stops11h 10m
Southwest
Tue 6/238:55 am
SFO
- PWM
2 stops11h 00m
Southwest
Deal found 5/12![Southwest logo]()
$427
This American Airlines deal was found by Cheapflights users on 5/13. 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 6/255:36 pm
PWM
- SFO
1 stop10h 12m
American Airlines
Sun 7/56:00 am
SFO
- PWM
1 stop9h 34m
American Airlines
Deal found 5/13![American Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 5/13. 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.
Sat 6/272:51 pm
PWM
- SFO
1 stop9h 09m
Delta
Sat 7/45:40 am
SFO
- PWM
1 stop7h 15m
Delta
Deal found 5/13![Delta logo]()
$434
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 May 14, 2026.
Search for one-way flight options from Portland to San Francisco. Find affordable one-way fares based on user searches. Data last updated May 14, 2026.
This Southwest deal was found by Cheapflights users on 5/9. 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 6/63:00 pm
PWM
- SFO
1 stop9h 10m
Southwest
Deal found 5/9![Southwest logo]()
$185
This Southwest deal was found by Cheapflights users on 5/13. 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 9/1510:30 am
PWM
- SFO
2 stops11h 35m
Southwest
Deal found 5/13![Southwest logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Wed 9/165:09 pm
PWM
- SFO
3 stops44h 38m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 5/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:00 am
PWM
- SFO
1 stop32h 02m
Breeze Airways
Deal found 5/11![Breeze Airways logo]()
$201
This Delta deal was found by Cheapflights users on 5/13. 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.
Fri 6/52:38 pm
PWM
- SFO
1 stop11h 11m
Delta
Deal found 5/13![Delta logo]()
$209
This American Airlines deal was found by Cheapflights users on 5/13. 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 6/53:05 pm
PWM
- SFO
2 stops10h 18m
American Airlines
Deal found 5/13![American Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 6/19:52 am
PWM
- SFO
2 stops33h 38m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$224
This Southwest deal was found by Cheapflights users on 5/9. 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 5/284:50 pm
PWM
- SFO
1 stop9h 30m
Southwest
Deal found 5/9![Southwest logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 5/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:56 pm
PWM
- SFO
3 stops55h 27m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 5/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:00 am
PWM
- SFO
3 stops31h 38m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Thu 5/287:56 pm
PWM
- SFO
3 stops55h 27m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$239
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 May 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $363 (American Airlines) |
One-way from | $185 (Southwest) |
Popular in | February |
Cheapest in | October |
Average price | $451 |
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 May 14, 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
Fri 9/4
3:37 pm-10:55 pm
1 stop10h 18m
San Francisco
Mon 9/7
11:30 pm-10:12 am
1 stop7h 42m
$369
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 6/3
5:00 pm-11:02 pm
1 stop9h 02m
San Francisco
Sat 6/6
9:15 pm-9:14 am
1 stop8h 59m
$369
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 8/19
5:45 am-11:35 am
1 stop8h 50m
San Francisco
Thu 8/27
11:05 pm-1:25 pm
1 stop11h 20m
$374
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Tue 7/14
3:45 pm-12:10 am
2 stops11h 25m
San Francisco
Wed 7/22
5:30 am-9:30 pm
2 stops13h 00m
$379
Quickest round-trip
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sat 6/27
2:51 pm-9:00 pm
1 stop9h 09m
San Francisco
Sat 7/4
5:40 am-3:55 pm
1 stop7h 15m
$434
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sat 8/8
5:40 am-3:50 pm
2 stops13h 10m
San Francisco
Sat 8/15
11:05 pm-4:35 pm
1 stop14h 30m
$439
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 5/27
1:35 pm-10:30 pm
2 stops11h 55m
San Francisco
Sun 5/31
5:00 am-5:07 pm
1 stop9h 07m
$454
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sat 6/6
6:00 am-11:44 am
1 stop8h 44m
San Francisco
Sat 6/13
9:30 pm-10:07 am
1 stop9h 37m
$463
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sat 6/27
3:30 pm-12:05 am
1 stop11h 35m
San Francisco
Fri 7/3
12:50 am-2:31 pm
1 stop10h 41m
$479
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Mon 6/8
7:16 pm-1:15 am
1 stop8h 59m
San Francisco
Sun 6/14
11:59 pm-1:25 pm
1 stop10h 26m
$479
Showing 1-10 of 23 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 May.
| 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, October is the cheapest month in which you can book a flight from Portland, Maine to San Francisco (average of $376). Flying from Portland, Maine to San Francisco in February 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 May 14, 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.
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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
Rancho Cordova
San Bruno
Watsonville
San Ramon
Vacaville
Roseville
San Carlos
Redwood City
Sunnyvale
Turlock
Vallejo
San Lorenzo
Davis
Emeryville
Manteca
Elk Grove
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Portland and San Francisco flights
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Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on May 14, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 14, 2026.
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 May 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$250 | Average$441 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$268 | Average$519 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$272 | Average$541 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$276 | Average$432 | FlexibilityNo cancel fee | On-timeN/A |