$149+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAN
Aug 14 — Aug 211
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 15, 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 15, 2026.
This American Airlines deal was found by Cheapflights users on 7/10. 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.
Sat 9/57:05 am
PWM
- SAN
1 stop8h 43m
American Airlines
Sat 10/246:20 am
SAN
- PWM
1 stop9h 36m
American Airlines
Deal found 7/10![American Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:00 am
PWM
- SAN
1 stop8h 23m
Delta
Sat 10/246:15 am
SAN
- PWM
2 stops11h 46m
Delta
Deal found 7/10![Delta logo]()
$302
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 8/255:30 am
PWM
- SAN
1 stop8h 36m
American Airlines
Tue 9/19:05 am
SAN
- PWM
1 stop9h 16m
American Airlines
Deal found 7/12![American Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:00 am
PWM
- SAN
1 stop8h 23m
Delta
Sat 9/126:15 am
SAN
- PWM
2 stops12h 10m
Delta
Deal found 7/11![Delta logo]()
$338
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 8/115:30 am
PWM
- SAN
1 stop8h 36m
American Airlines
Tue 8/189:48 am
SAN
- PWM
1 stop10h 00m
American Airlines
Deal found 7/12![American Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 7/11. 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 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
Thu 9/106:25 am
SAN
- PWM
2 stops14h 31m
Delta
Deal found 7/11![Delta logo]()
$343
This Southwest deal was found by Cheapflights users on 7/14. 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 10/55:20 am
PWM
- SAN
2 stops14h 30m
Southwest
Tue 10/610:40 pm
SAN
- PWM
1 stop9h 15m
Southwest
Deal found 7/14![Southwest logo]()
$344
This JetBlue deal was found by Cheapflights users on 7/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:20 pm
PWM
- SAN
1 stop8h 46m
JetBlue
Sat 9/1210:40 am
SAN
- PWM
1 stop10h 12m
JetBlue
Deal found 7/11![JetBlue logo]()
$347
This Southwest deal was found by Cheapflights users on 7/13. 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.
Thu 9/33:40 pm
PWM
- SAN
2 stops9h 15m
Southwest
Sat 9/127:35 am
SAN
- PWM
1 stop10h 25m
Southwest
Deal found 7/13![Southwest logo]()
$351
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 15, 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 15, 2026.
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:05 am
PWM
- SAN
1 stop8h 02m
Delta
Tue 8/181:10 pm
SAN
- PWM
1 stop8h 49m
Delta
Deal found 7/10![Delta logo]()
$326
This United Airlines deal was found by Cheapflights users on 7/10. 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 8/266:03 am
PWM
- SAN
1 stop8h 12m
United Airlines
Sat 8/299:45 pm
SAN
- PWM
1 stop9h 19m
United Airlines
Deal found 7/10![United Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:30 am
PWM
- SAN
2 stops10h 40m
Delta
Sat 9/196:20 am
SAN
- PWM
2 stops14h 36m
Delta
Deal found 7/11![Delta logo]()
$343
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/182:53 pm
PWM
- SAN
1 stop11h 50m
Delta
Mon 8/249:30 pm
SAN
- PWM
2 stops12h 02m
Delta
Deal found 7/11![Delta logo]()
$381
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am
PWM
- SAN
1 stop8h 16m
Delta
Sun 10/259:45 pm
SAN
- PWM
2 stops12h 37m
Delta
Deal found 7/10![Delta logo]()
$397
This Delta deal was found by Cheapflights users on 7/11. 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 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
Fri 9/1112:52 pm
SAN
- PWM
1 stop7h 38m
Delta
Deal found 7/11![Delta logo]()
$410
This Delta deal was found by Cheapflights users on 7/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:00 am
PWM
- SAN
2 stops15h 27m
Delta
Thu 11/266:15 am
SAN
- PWM
1 stop6h 55m
Delta
Deal found 7/12![Delta logo]()
$415
This Delta deal was found by Cheapflights users on 7/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:15 pm
PWM
- SAN
1 stop10h 31m
Delta
Sun 10/259:45 pm
SAN
- PWM
2 stops15h 10m
Delta
Deal found 7/12![Delta logo]()
$415
Last-minute flights from Portland to San DiegoDiscover last-minute flight deals from Portland to San Diego. Data last updated July 15, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Diego. Data last updated July 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 8/115:30 am
PWM
- SAN
1 stop8h 36m
American Airlines
Tue 8/189:48 am
SAN
- PWM
1 stop10h 00m
American Airlines
Deal found 7/12![American Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:05 am
PWM
- SAN
1 stop8h 02m
Delta
Wed 8/268:00 am
SAN
- PWM
2 stops12h 30m
Delta
Deal found 7/11![Delta logo]()
$338
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:05 am
PWM
- SAN
1 stop8h 02m
Delta
Tue 8/2510:37 am
SAN
- PWM
1 stop9h 36m
Delta
Deal found 7/11![Delta logo]()
$376
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:05 am
PWM
- SAN
1 stop8h 02m
Delta
Thu 8/271:10 pm
SAN
- PWM
1 stop8h 49m
Delta
Deal found 7/11![Delta logo]()
$406
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:01 am
PWM
- SAN
2 stops12h 57m
Delta
Mon 8/2410:25 pm
SAN
- PWM
2 stops12h 48m
Delta
Deal found 7/11![Delta logo]()
$343
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:00 am
PWM
- SAN
1 stop20h 43m
Delta
Mon 8/2410:17 pm
SAN
- PWM
2 stops12h 56m
Delta
Deal found 7/11![Delta logo]()
$405
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 8/255:30 am
PWM
- SAN
1 stop8h 36m
American Airlines
Tue 9/19:05 am
SAN
- PWM
1 stop9h 16m
American Airlines
Deal found 7/12![American Airlines logo]()
$333
This American Airlines deal was found by Cheapflights users on 7/10. 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 8/255:30 am
PWM
- SAN
1 stop8h 36m
American Airlines
Sun 8/306:15 am
SAN
- PWM
1 stop8h 17m
American Airlines
Deal found 7/10![American Airlines logo]()
$392
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:30 am
PWM
- SAN
2 stops13h 35m
Delta
Sun 8/3010:17 pm
SAN
- PWM
2 stops11h 15m
Delta
Deal found 7/10![Delta logo]()
$402
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Sat 8/296:02 am
PWM
- SAN
2 stops10h 06m
American Airlines
Sat 9/266:20 am
SAN
- PWM
1 stop10h 18m
American Airlines
Deal found 7/12![American Airlines logo]()
$395
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:05 am
PWM
- SAN
1 stop8h 02m
Delta
Tue 9/156:25 am
SAN
- PWM
2 stops14h 05m
Delta
Deal found 7/11![Delta logo]()
$381
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:50 am
PWM
- SAN
2 stops9h 16m
Delta
Sat 9/126:15 am
SAN
- PWM
2 stops12h 10m
Delta
Deal found 7/11![Delta logo]()
$386
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 15, 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 15, 2026.
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Thu 9/106:00 am
PWM
- SAN
1 stop8h 25m
United Airlines
Deal found 7/10![United Airlines logo]()
$149
This Southwest deal was found by Cheapflights users on 7/10. 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.
Thu 9/103:40 pm
PWM
- SAN
2 stops9h 15m
Southwest
Deal found 7/10![Southwest logo]()
$154
This United Airlines deal was found by Cheapflights users on 7/14. 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 8/246:03 am
PWM
- SAN
1 stop8h 12m
United Airlines
Deal found 7/14![United Airlines logo]()
$167
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 8/115:30 am
PWM
- SAN
1 stop8h 36m
American Airlines
Deal found 7/12![American Airlines logo]()
$173
This Southwest deal was found by Cheapflights users on 7/12. 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.
Mon 9/145:55 am
PWM
- SAN
1 stop13h 20m
Southwest
Deal found 7/12![Southwest logo]()
$185
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Mon 9/145:38 pm
PWM
- SAN
1 stop8h 47m
American Airlines
Deal found 7/12![American Airlines logo]()
$194
This American Airlines deal was found by Cheapflights users on 7/13. 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.
Mon 8/246:09 pm
PWM
- SAN
1 stop8h 38m
American Airlines
Deal found 7/13![American Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/242:53 pm
PWM
- SAN
2 stops11h 57m
Delta
Deal found 7/10![Delta logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 7/14. 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 8/289:52 am
PWM
- SAN
2 stops32h 49m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$222
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Tue 8/116:00 am
PWM
- SAN
1 stop8h 15m
United Airlines
Deal found 7/13![United Airlines logo]()
$226
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 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $297 (American Airlines) |
One-way from | $149 (United Airlines) |
Popular in | March |
Cheapest in | September |
Average price | $486 |
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 15, 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
Tue 8/11
6:05 am-11:07 am
1 stop8h 02m
San Diego
Tue 8/18
1:10 pm-12:59 am
1 stop8h 49m
$326
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 9/9
6:30 am-2:10 pm
2 stops10h 40m
San Diego
Sat 9/19
6:20 am-11:56 pm
2 stops14h 36m
$343
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 8/18
2:53 pm-11:43 pm
1 stop11h 50m
San Diego
Mon 8/24
9:30 pm-12:32 pm
2 stops12h 02m
$381
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 10/23
6:00 am-11:16 am
1 stop8h 16m
San Diego
Sun 10/25
9:45 pm-1:22 pm
2 stops12h 37m
$397
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 8/26
6:03 am-11:15 am
1 stop8h 12m
San Diego
Sat 8/29
9:45 pm-10:04 am
1 stop9h 19m
$407
Quickest round-trip
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 9/2
12:47 pm-6:14 pm
1 stop8h 27m
San Diego
Fri 9/11
12:52 pm-11:30 pm
1 stop7h 38m
$410
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 11/21
6:00 am-6:27 pm
2 stops15h 27m
San Diego
Thu 11/26
6:15 am-4:10 pm
1 stop6h 55m
$415
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 10/21
4:15 pm-11:46 pm
1 stop10h 31m
San Diego
Sun 10/25
9:45 pm-3:55 pm
2 stops15h 10m
$415
Cheapest one-way
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Thu 9/10
10:30 am-4:15 pm
1 stop8h 45m
$149
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Mon 8/24
2:53 pm-11:43 pm
1 stop11h 50m
$149
Showing 1-10 of 17 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 15, 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.
Boarding
8.1
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
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.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
National City
Chula Vista
Poway
La Mesa
Coronado
Santee
San Ysidro
Julian
Lemon Grove
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Portland
Popular flights
San Diego flight routes
Alternative routes for Portland to San Diego
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Diego by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to San Diego by cabin class
Find flights from Portland to San Diego, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portland and San Diego flights
Browse other Portland and San Diego flight options. Last updated on July 15, 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 July 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Diego
Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 15, 2026.
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 15, 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% |