$167+ Cheap flights from Portland, ME to San Diego (PWM - SAN)
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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAN
Aug 19 — Aug 261
Round-trip
1 adult, Economy
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Find cheap flights from Portland to San Diego 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.Cheap flight deals from Portland to San Diego
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to San DiegoExplore the most affordable flight options available from Portland to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 20, 2026.
Explore the most affordable flight options available from Portland to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 20, 2026.
This American Airlines deal was found by Cheapflights users on 7/20. 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 9/54:07 pm
PWM
- SAN
1 stop8h 15m
American Airlines
Fri 9/1110:04 am
SAN
- PWM
1 stop10h 43m
American Airlines
Deal found 7/20![American Airlines logo]()
$332
This United Airlines deal was found by Cheapflights users on 7/15. 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 9/56:00 am
PWM
- SAN
1 stop9h 47m
United Airlines
Sat 10/109:20 pm
SAN
- PWM
1 stop8h 48m
United Airlines
Deal found 7/15![United Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 7/15. 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 9/56:05 am
PWM
- SAN
1 stop8h 15m
Delta
Tue 9/156:15 am
SAN
- PWM
2 stops14h 15m
Delta
Deal found 7/15![Delta logo]()
$338
This Delta deal was found by Cheapflights users on 7/15. 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 9/56:00 am
PWM
- SAN
2 stops12h 51m
Delta
Mon 9/149:45 pm
SAN
- PWM
2 stops10h 10m
Delta
Deal found 7/15![Delta logo]()
$343
This American Airlines deal was found by Cheapflights users on 7/18. 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 9/125:30 am
PWM
- SAN
1 stop8h 37m
American Airlines
Sat 10/1710:06 am
SAN
- PWM
1 stop10h 37m
American Airlines
Deal found 7/18![American Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 7/17. 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 9/126:02 am
PWM
- SAN
1 stop8h 34m
Delta
Sat 10/176:15 am
SAN
- PWM
2 stops11h 46m
Delta
Deal found 7/17![Delta logo]()
$351
This Southwest deal was found by Cheapflights users on 7/15. 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 9/57:25 am
PWM
- SAN
2 stops9h 50m
Southwest
Sat 10/106:15 am
SAN
- PWM
1 stop12h 55m
Southwest
Deal found 7/15![Southwest logo]()
$357
This Delta deal was found by Cheapflights users on 7/20. 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 8/116:05 am
PWM
- SAN
1 stop9h 28m
Delta
Tue 8/1810:37 am
SAN
- PWM
1 stop9h 36m
Delta
Deal found 7/20![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 7/15. 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
- SAN
2 stops10h 15m
Southwest
Sat 9/2610:40 pm
SAN
- PWM
2 stops14h 00m
Southwest
Deal found 7/15![Southwest logo]()
$362
This Delta deal was found by Cheapflights users on 7/19. 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 8/1112:47 pm
PWM
- SAN
1 stop8h 27m
Delta
Sat 8/2910:25 pm
SAN
- PWM
2 stops10h 37m
Delta
Deal found 7/19![Delta logo]()
$364
This Delta deal was found by Cheapflights users on 7/15. 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 9/22:53 pm
PWM
- SAN
1 stop11h 50m
Delta
Tue 9/1510:56 am
SAN
- PWM
1 stop9h 34m
Delta
Deal found 7/15![Delta logo]()
$366
Best flights from Portland to San DiegoDiscover carefully curated flight deals from Portland to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 20, 2026.
Discover carefully curated flight deals from Portland to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 20, 2026.
This Delta deal was found by Cheapflights users on 7/15. 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 9/56:05 am
PWM
- SAN
1 stop8h 15m
Delta
Tue 9/156:15 am
SAN
- PWM
2 stops14h 15m
Delta
Deal found 7/15![Delta logo]()
$338
This Southwest deal was found by Cheapflights users on 7/17. 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 10/35:35 am
PWM
- SAN
1 stop8h 10m
Southwest
Wed 10/76:50 am
SAN
- PWM
1 stop7h 30m
Southwest
Deal found 7/17![Southwest logo]()
$359
This Delta deal was found by Cheapflights users on 7/18. 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 10/64:15 pm
PWM
- SAN
1 stop10h 31m
Delta
Sat 10/106:15 am
SAN
- PWM
2 stops11h 46m
Delta
Deal found 7/18![Delta logo]()
$364
This Southwest deal was found by Cheapflights users on 7/18. 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 10/175:35 am
PWM
- SAN
1 stop8h 10m
Southwest
Wed 10/219:30 am
SAN
- PWM
2 stops10h 05m
Southwest
Deal found 7/18![Southwest logo]()
$394
This Delta deal was found by Cheapflights users on 7/17. 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 8/112:14 pm
PWM
- SAN
1 stop8h 21m
Delta
Tue 8/186:15 am
SAN
- PWM
2 stops13h 58m
Delta
Deal found 7/17![Delta logo]()
$364
This Southwest deal was found by Cheapflights users on 7/17. 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 9/197:25 am
PWM
- SAN
2 stops10h 45m
Southwest
Sat 9/2610:40 pm
SAN
- PWM
1 stop8h 55m
Southwest
Deal found 7/17![Southwest logo]()
$394
This Delta deal was found by Cheapflights users on 7/19. 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 8/136:00 am
PWM
- SAN
2 stops14h 04m
Delta
Wed 8/267:59 pm
SAN
- PWM
2 stops11h 46m
Delta
Deal found 7/19![Delta logo]()
$370
This Delta deal was found by Cheapflights users on 7/15. 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 9/212:47 pm
PWM
- SAN
1 stop8h 27m
Delta
Mon 9/149:59 pm
SAN
- PWM
1 stop14h 40m
Delta
Deal found 7/15![Delta logo]()
$400
This Delta deal was found by Cheapflights users on 7/15. 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 9/42:53 pm
PWM
- SAN
1 stop11h 50m
Delta
Sat 9/126:15 am
SAN
- PWM
2 stops12h 10m
Delta
Deal found 7/15![Delta logo]()
$415
This Delta deal was found by Cheapflights users on 7/19. 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 8/172:53 pm
PWM
- SAN
1 stop11h 50m
Delta
Fri 8/216:15 am
SAN
- PWM
2 stops13h 58m
Delta
Deal found 7/19![Delta logo]()
$428
Last-minute flights from Portland to San DiegoDiscover last-minute flight deals from Portland to San Diego. Data last updated July 20, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Diego. Data last updated July 20, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/20. 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 8/116:05 am
PWM
- SAN
1 stop9h 28m
Delta
Tue 8/1810:37 am
SAN
- PWM
1 stop9h 36m
Delta
Deal found 7/20![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 7/19. 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 8/1112:47 pm
PWM
- SAN
1 stop8h 27m
Delta
Sat 8/2910:25 pm
SAN
- PWM
2 stops10h 37m
Delta
Deal found 7/19![Delta logo]()
$364
This Delta deal was found by Cheapflights users on 7/19. 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 8/1112:47 pm
PWM
- SAN
2 stops13h 13m
Delta
Thu 8/276:15 am
SAN
- PWM
2 stops13h 58m
Delta
Deal found 7/19![Delta logo]()
$370
This Delta deal was found by Cheapflights users on 7/19. 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 8/112:53 pm
PWM
- SAN
1 stop11h 50m
Delta
Mon 8/3110:37 am
SAN
- PWM
1 stop9h 36m
Delta
Deal found 7/19![Delta logo]()
$423
This American Airlines deal was found by Cheapflights users on 7/16. 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 8/117:28 am
PWM
- SAN
2 stops10h 58m
American Airlines
Tue 8/186:15 am
SAN
- PWM
1 stop8h 17m
American Airlines
Deal found 7/16![American Airlines logo]()
$425
This Delta deal was found by Cheapflights users on 7/19. 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 8/122:14 pm
PWM
- SAN
1 stop8h 21m
Delta
Wed 8/2610:37 am
SAN
- PWM
1 stop9h 36m
Delta
Deal found 7/19![Delta logo]()
$389
This Delta deal was found by Cheapflights users on 7/19. 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 8/146:30 am
PWM
- SAN
2 stops17h 28m
Delta
Sat 8/298:00 am
SAN
- PWM
1 stop10h 31m
Delta
Deal found 7/19![Delta logo]()
$428
This American Airlines deal was found by Cheapflights users on 7/15. 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 8/297:05 am
PWM
- SAN
1 stop8h 43m
American Airlines
Sat 9/2610:04 am
SAN
- PWM
1 stop10h 43m
American Airlines
Deal found 7/15![American Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 7/19. 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 8/297:25 am
PWM
- SAN
2 stops11h 10m
Southwest
Sat 9/2610:40 pm
SAN
- PWM
2 stops14h 00m
Southwest
Deal found 7/19![Southwest logo]()
$430
One-way flights from Portland to San DiegoSearch for one-way flight options from Portland to San Diego. Find affordable one-way fares based on user searches. Data last updated July 20, 2026.
Search for one-way flight options from Portland to San Diego. Find affordable one-way fares based on user searches. Data last updated July 20, 2026.
This Southwest deal was found by Cheapflights users on 7/16. 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 9/115:55 am
PWM
- SAN
1 stop9h 05m
Southwest
Deal found 7/16![Southwest logo]()
$167
This Delta deal was found by Cheapflights users on 7/19. 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 8/172:53 pm
PWM
- SAN
1 stop11h 50m
Delta
Deal found 7/19![Delta logo]()
$180
This Delta deal was found by Cheapflights users on 7/18. 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 8/1311:50 am
PWM
- SAN
2 stops13h 26m
Delta
Deal found 7/18![Delta logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 9/248:14 pm
PWM
- SAN
3 stops46h 27m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Fri 9/116:00 am
PWM
- SAN
3 stops36h 41m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 7/15. 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.
Fri 9/116:00 am
PWM
- SAN
1 stop9h 00m
Breeze Airways
Deal found 7/15![Breeze Airways logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 7/19. 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.
Tue 9/295:09 pm
PWM
- SAN
3 stops33h 50m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$213
This Southwest deal was found by Cheapflights users on 7/16. 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 8/133:40 pm
PWM
- SAN
2 stops9h 15m
Southwest
Deal found 7/16![Southwest logo]()
$240
This Southwest deal was found by Cheapflights users on 7/19. 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 12/2512:50 pm
PWM
- SAN
1 stop11h 05m
Southwest
Deal found 7/19![Southwest logo]()
$244
Find flight deals from Portland to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to San Diego (SAN). 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 July 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $332 (American Airlines) |
One-way from | $167 (Southwest) |
Popular in | March |
Cheapest in | September |
Average price | $581 |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland to San Diego 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 July 20, 2026.
Use the filters below to find and compare flights from Portland to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 9/5
6:05 am-11:20 am
1 stop8h 15m
San Diego
Tue 9/15
6:15 am-11:30 pm
2 stops14h 15m
$338
Quickest round-trip
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 10/3
5:35 am-10:45 am
1 stop8h 10m
San Diego
Wed 10/7
6:50 am-5:20 pm
1 stop7h 30m
$359
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 10/6
4:15 pm-11:46 pm
1 stop10h 31m
San Diego
Sat 10/10
6:15 am-9:01 pm
2 stops11h 46m
$364
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 8/11
2:14 pm-7:35 pm
1 stop8h 21m
San Diego
Tue 8/18
6:15 am-11:13 pm
2 stops13h 58m
$364
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Thu 8/13
6:00 am-5:04 pm
2 stops14h 04m
San Diego
Wed 8/26
7:59 pm-10:45 am
2 stops11h 46m
$370
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 10/17
5:35 am-10:45 am
1 stop8h 10m
San Diego
Wed 10/21
9:30 am-10:35 pm
2 stops10h 05m
$394
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 9/19
7:25 am-3:10 pm
2 stops10h 45m
San Diego
Sat 9/26
10:40 pm-10:35 am
1 stop8h 55m
$394
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 9/2
12:47 pm-6:14 pm
1 stop8h 27m
San Diego
Mon 9/14
9:59 pm-3:39 pm
1 stop14h 40m
$400
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 9/4
2:53 pm-11:43 pm
1 stop11h 50m
San Diego
Sat 9/12
6:15 am-9:25 pm
2 stops12h 10m
$415
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Mon 8/17
2:53 pm-11:43 pm
1 stop11h 50m
San Diego
Fri 8/21
6:15 am-11:13 pm
2 stops13h 58m
$428
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Portland to San Diego
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 Diego in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Portland, Maine-San Diego 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 Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland, Maine-San Diego 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 Diego 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 Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Portland with our price prediction graph.
PWM-SAN
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 Diego
How far ahead should I book a flight from Portland, Maine to San Diego?
To ensure you get the cheapest price possible for a flight from Portland, Maine to San Diego, you should look to book at least 16 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Portland, Maine to San Diego?
Currently, September is the cheapest month in which you can book a flight from Portland, Maine to San Diego (average of $399). Flying from Portland, Maine to San Diego in March is currently the most expensive (average of $687). 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 Diego?
Reviews of airlines servicing San Diego
Get insights into the airlines that provide service to San Diego. 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 Diego. Reviews last updated July 20, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Portland to San Diego. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
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 Diego. 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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Top 4 airlines flying from Portland to San Diego
Discover the top 4 airlines that operate flights from Portland to San Diego. 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 July 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$304 | Average$547 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$311 | Average$480 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$312 | Average$483 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$325 | Average$497 | FlexibilityNo cancel fee | On-time63% |