$156+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SFO
Jun 27 — Jul 41
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 28, 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 28, 2026.
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sun 9/137:30 am
PWM
- SFO
Nonstop6h 35m
United Airlines
Sun 9/209:30 pm
SFO
- PWM
1 stop9h 34m
United Airlines
Deal found 5/27![United Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 5/23. 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 10/225:30 am
PWM
- SFO
1 stop8h 45m
Southwest
Tue 10/279:40 pm
SFO
- PWM
1 stop9h 05m
Southwest
Deal found 5/23![Southwest logo]()
$364
This American Airlines deal was found by Cheapflights users on 5/28. 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 9/23:06 pm
PWM
- SFO
1 stop9h 03m
American Airlines
Wed 9/167:40 am
SFO
- PWM
1 stop11h 16m
American Airlines
Deal found 5/28![American Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 5/27. 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 6/266:57 pm
PWM
- SFO
1 stop8h 48m
Delta
Wed 7/295:40 am
SFO
- PWM
1 stop7h 21m
Delta
Deal found 5/27![Delta logo]()
$393
This American Airlines deal was found by Cheapflights users on 5/25. 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 7/95:40 pm
PWM
- SFO
1 stop10h 03m
American Airlines
Tue 7/1411:07 pm
SFO
- PWM
2 stops10h 28m
American Airlines
Deal found 5/25![American Airlines logo]()
$394
This Southwest deal was found by Cheapflights users on 5/26. 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 10/135:50 am
PWM
- SFO
1 stop10h 15m
Southwest
Sat 10/175:30 pm
SFO
- PWM
2 stops13h 15m
Southwest
Deal found 5/26![Southwest logo]()
$398
This American Airlines deal was found by Cheapflights users on 5/26. 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
2 stops10h 27m
American Airlines
Tue 7/711:07 pm
SFO
- PWM
2 stops10h 28m
American Airlines
Deal found 5/26![American Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 5/28. 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.
Fri 10/166:30 am
PWM
- SFO
2 stops11h 05m
Southwest
Mon 10/1910:50 pm
SFO
- PWM
2 stops11h 00m
Southwest
Deal found 5/28![Southwest logo]()
$403
This Delta deal was found by Cheapflights users on 5/27. 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 7/2712:35 am
SFO
- PWM
1 stop7h 07m
Delta
Deal found 5/27![Delta logo]()
$404
This Delta deal was found by Cheapflights users on 5/26. 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 10/136:50 pm
PWM
- SFO
2 stops20h 04m
Delta
Sat 10/176:00 am
SFO
- PWM
1 stop7h 10m
Delta
Deal found 5/26![Delta logo]()
$412
This American Airlines deal was found by Cheapflights users on 5/25. 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 8/57:22 am
PWM
- SFO
2 stops11h 40m
American Airlines
Wed 8/196:36 am
SFO
- PWM
1 stop9h 17m
American Airlines
Deal found 5/25![American Airlines logo]()
$414
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 28, 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 28, 2026.
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sun 9/137:30 am
PWM
- SFO
Nonstop6h 35m
United Airlines
Sun 9/209:30 pm
SFO
- PWM
1 stop9h 34m
United Airlines
Deal found 5/27![United Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 5/27. 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
Sun 7/2612:35 am
SFO
- PWM
1 stop7h 07m
Delta
Deal found 5/27![Delta logo]()
$404
This Southwest deal was found by Cheapflights users on 5/25. 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 8/315:55 am
PWM
- SFO
2 stops11h 45m
Southwest
Sun 9/69:10 am
SFO
- PWM
2 stops10h 45m
Southwest
Deal found 5/25![Southwest logo]()
$427
This United Airlines deal was found by Cheapflights users on 5/24. 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 9/125:15 am
PWM
- SFO
1 stop9h 00m
United Airlines
Mon 9/1411:14 pm
SFO
- PWM
1 stop7h 50m
United Airlines
Deal found 5/24![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 5/24. 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 7/316:59 pm
PWM
- SFO
1 stop8h 37m
Delta
Sun 8/212:12 am
SFO
- PWM
1 stop7h 33m
Delta
Deal found 5/24![Delta logo]()
$414
This Delta deal was found by Cheapflights users on 5/25. 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.
Mon 8/3112:47 pm
PWM
- SFO
1 stop8h 26m
Delta
Sun 9/65:36 am
SFO
- PWM
1 stop7h 25m
Delta
Deal found 5/25![Delta logo]()
$414
This Southwest deal was found by Cheapflights users on 5/23. 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 8/55:45 am
PWM
- SFO
2 stops11h 55m
Southwest
Wed 8/510:30 pm
SFO
- PWM
1 stop8h 20m
Southwest
Deal found 5/23![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 5/26. 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 7/133:20 pm
PWM
- SFO
2 stops12h 15m
Southwest
Wed 7/155:15 am
SFO
- PWM
1 stop13h 20m
Southwest
Deal found 5/26![Southwest logo]()
$485
This United Airlines deal was found by Cheapflights users on 5/25. 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 6/186:00 am
PWM
- SFO
1 stop8h 44m
United Airlines
Sun 6/216:00 am
SFO
- PWM
1 stop9h 35m
United Airlines
Deal found 5/25![United Airlines logo]()
$513
This Southwest deal was found by Cheapflights users on 5/27. 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.
Sun 9/136:10 am
PWM
- SFO
1 stop10h 00m
Southwest
Sun 9/207:50 pm
SFO
- PWM
2 stops11h 00m
Southwest
Deal found 5/27![Southwest logo]()
$493
This Delta deal was found by Cheapflights users on 5/27. 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 6/236:57 pm
PWM
- SFO
2 stops16h 26m
Delta
Tue 7/284:39 pm
SFO
- PWM
2 stops15h 03m
Delta
Deal found 5/27![Delta logo]()
$515
This Southwest deal was found by Cheapflights users on 5/24. 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.
Fri 7/3110:25 am
PWM
- SFO
2 stops12h 30m
Southwest
Mon 8/36:10 pm
SFO
- PWM
2 stops12h 45m
Southwest
Deal found 5/24![Southwest logo]()
$513
Last-minute flights from Portland to San FranciscoDiscover last-minute flight deals from Portland to San Francisco. Data last updated May 28, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Francisco. Data last updated May 28, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 5/26. 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 6/92:59 pm
PWM
- SFO
1 stop10h 36m
Delta
Sun 6/2112:40 am
SFO
- PWM
1 stop7h 03m
Delta
Deal found 5/26![Delta logo]()
$454
This Delta deal was found by Cheapflights users on 5/24. 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 6/162:59 pm
PWM
- SFO
1 stop10h 47m
Delta
Sun 6/2112:40 am
SFO
- PWM
1 stop7h 03m
Delta
Deal found 5/24![Delta logo]()
$414
This Delta deal was found by Cheapflights users on 5/28. 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 6/171:55 pm
PWM
- SFO
1 stop11h 54m
Delta
Mon 6/2212:40 am
SFO
- PWM
1 stop7h 03m
Delta
Deal found 5/28![Delta logo]()
$444
This Delta deal was found by Cheapflights users on 5/27. 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 6/236:57 pm
PWM
- SFO
2 stops16h 26m
Delta
Wed 7/295:40 am
SFO
- PWM
1 stop7h 21m
Delta
Deal found 5/27![Delta logo]()
$452
This American Airlines deal was found by Cheapflights users on 5/27. 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 6/252:24 pm
PWM
- SFO
1 stop11h 25m
American Airlines
Sun 7/56:04 am
SFO
- PWM
1 stop9h 48m
American Airlines
Deal found 5/27![American Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 5/27. 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
Wed 7/295:40 am
SFO
- PWM
1 stop7h 21m
Delta
Deal found 5/27![Delta logo]()
$404
This Delta deal was found by Cheapflights users on 5/27. 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 7/276:43 pm
SFO
- PWM
2 stops12h 59m
Delta
Deal found 5/27![Delta logo]()
$457
This Delta deal was found by Cheapflights users on 5/27. 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 6/266:57 pm
PWM
- SFO
1 stop8h 48m
Delta
Sun 7/2612:35 am
SFO
- PWM
1 stop7h 07m
Delta
Deal found 5/27![Delta logo]()
$393
This Delta deal was found by Cheapflights users on 5/27. 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 6/266:57 pm
PWM
- SFO
1 stop8h 48m
Delta
Tue 7/285:40 am
SFO
- PWM
2 stops14h 50m
Delta
Deal found 5/27![Delta logo]()
$455
This Delta deal was found by Cheapflights users on 5/27. 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 6/276:14 am
PWM
- SFO
1 stop11h 43m
Delta
Mon 7/276:43 pm
SFO
- PWM
2 stops12h 59m
Delta
Deal found 5/27![Delta logo]()
$422
This Delta deal was found by Cheapflights users on 5/27. 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 6/276:14 am
PWM
- SFO
1 stop11h 43m
Delta
Tue 7/285:40 am
SFO
- PWM
2 stops14h 50m
Delta
Deal found 5/27![Delta logo]()
$431
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 28, 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 28, 2026.
This Southwest deal was found by Cheapflights users on 5/25. 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 10/287:30 am
PWM
- SFO
1 stop8h 15m
Southwest
Deal found 5/25![Southwest logo]()
$156
This Southwest deal was found by Cheapflights users on 5/26. 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 7/21:00 pm
PWM
- SFO
1 stop9h 55m
Southwest
Deal found 5/26![Southwest logo]()
$185
This Delta deal was found by Cheapflights users on 5/27. 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 5/27![Delta logo]()
$209
This Southwest deal was found by Cheapflights users on 5/23. 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 6/107:30 am
PWM
- SFO
1 stop8h 05m
Southwest
Deal found 5/23![Southwest logo]()
$225
This Booking.com deal was found by Cheapflights users on 5/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1312:58 pm
PWM
- SFO
1 stop12h 55m
Sun Country Air
Deal found 5/27![Sun Country Air logo]()
$233
This Southwest deal was found by Cheapflights users on 5/27. 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
Deal found 5/27![Southwest logo]()
$235
This Booking.com deal was found by Cheapflights users on 5/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2712:58 pm
PWM
- SFO
1 stop12h 55m
Sun Country Air
Deal found 5/25![Sun Country Air logo]()
$253
This American Airlines deal was found by Cheapflights users on 5/27. 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 6/102:24 pm
PWM
- SFO
1 stop11h 25m
American Airlines
Deal found 5/27![American Airlines logo]()
$254
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 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $359 (United Airlines) |
One-way from | $156 (Southwest) |
Popular in | June |
Cheapest in | October |
Average price | $493 |
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 28, 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
Sun 9/13
7:30 am-11:05 am
Nonstop6h 35m
San Francisco
Sun 9/20
9:30 pm-10:04 am
1 stop9h 34m
$359
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sat 9/12
5:15 am-11:15 am
1 stop9h 00m
San Francisco
Mon 9/14
11:14 pm-10:04 am
1 stop7h 50m
$369
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Thu 6/25
6:57 pm-12:45 am
1 stop8h 48m
San Francisco
Sun 7/26
12:35 am-10:42 am
1 stop7h 07m
$404
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Fri 7/31
6:59 pm-12:36 am
1 stop8h 37m
San Francisco
Sun 8/2
12:12 am-10:45 am
1 stop7h 33m
$414
Quickest round-trip
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Mon 8/31
12:47 pm-6:13 pm
1 stop8h 26m
San Francisco
Sun 9/6
5:36 am-4:01 pm
1 stop7h 25m
$414
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Mon 8/31
5:55 am-2:40 pm
2 stops11h 45m
San Francisco
Sun 9/6
9:10 am-10:55 pm
2 stops10h 45m
$427
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Wed 8/5
5:45 am-2:40 pm
2 stops11h 55m
San Francisco
Wed 8/5
10:30 pm-9:50 am
1 stop8h 20m
$467
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Mon 7/13
3:20 pm-12:35 am
2 stops12h 15m
San Francisco
Wed 7/15
5:15 am-9:35 pm
1 stop13h 20m
$485
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Sun 9/13
6:10 am-1:10 pm
1 stop10h 00m
San Francisco
Sun 9/20
7:50 pm-9:50 am
2 stops11h 00m
$493
PortlandSan Francisco
PWM - SFO
PWMSFO
Portland
Thu 6/18
6:00 am-11:44 am
1 stop8h 44m
San Francisco
Sun 6/21
6:00 am-6:35 pm
1 stop9h 35m
$513
Showing 1-10 of 24 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 June is currently the most expensive (average of $568). 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 28, 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.
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.5
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
Cupertino
San Bruno
Watsonville
San Ramon
Vacaville
Roseville
San Carlos
Redwood City
Daly City
Sunnyvale
Turlock
Vallejo
San Lorenzo
Davis
Emeryville
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Portland and San Francisco flights
Browse other Portland and San Francisco flight options. Last updated on May 28, 2026.
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 28, 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 28, 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 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$250 | Average$447 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$268 | Average$530 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$272 | Average$541 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$276 | Average$457 | FlexibilityNo cancel fee | On-timeN/A |