$180+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAN
Mar 3 — Mar 101
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 February 1, 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 February 1, 2026.
This American Airlines deal was found by Cheapflights users on 1/30. 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 3/186:17 am
PWM
- SAN
1 stop19h 23m
American Airlines
Wed 3/256:20 am
SAN
- PWM
1 stop14h 14m
American Airlines
Deal found 1/30![American Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 2/1. 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 2/203:10 pm
PWM
- SAN
1 stop9h 15m
United Airlines
Wed 2/258:30 am
SAN
- PWM
2 stops11h 50m
United Airlines
Deal found 2/1![United Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 1/31. 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 3/136:17 am
PWM
- SAN
1 stop18h 26m
American Airlines
Tue 3/176:20 am
SAN
- PWM
1 stop14h 17m
American Airlines
Deal found 1/31![American Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 2/1. 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 2/2012:13 pm
PWM
- SAN
2 stops13h 51m
Delta
Wed 2/2510:15 pm
SAN
- PWM
2 stops10h 45m
Delta
Deal found 2/1![Delta logo]()
$370
This American Airlines deal was found by Cheapflights users on 1/31. 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 3/166:17 am
PWM
- SAN
1 stop19h 23m
American Airlines
Sat 3/216:20 am
SAN
- PWM
1 stop14h 14m
American Airlines
Deal found 1/31![American Airlines logo]()
$372
This American Airlines deal was found by Cheapflights users on 1/31. 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 4/217:07 am
PWM
- SAN
1 stop16h 23m
American Airlines
Tue 4/286:15 am
SAN
- PWM
1 stop13h 55m
American Airlines
Deal found 1/31![American Airlines logo]()
$375
This United Airlines deal was found by Cheapflights users on 1/31. 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 4/214:23 pm
PWM
- SAN
1 stop9h 36m
United Airlines
Tue 4/287:14 pm
SAN
- PWM
2 stops11h 11m
United Airlines
Deal found 1/31![United Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 1/31. 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 3/23:55 pm
PWM
- SAN
1 stop8h 35m
Southwest
Mon 3/911:30 am
SAN
- PWM
1 stop9h 35m
Southwest
Deal found 1/31![Southwest logo]()
$403
This United Airlines deal was found by Cheapflights users on 1/30. 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 3/43:05 pm
PWM
- SAN
1 stop9h 20m
United Airlines
Sun 3/88:50 pm
SAN
- PWM
2 stops10h 59m
United Airlines
Deal found 1/30![United Airlines logo]()
$408
This Southwest deal was found by Cheapflights users on 1/30. 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 4/143:55 pm
PWM
- SAN
2 stops9h 45m
Southwest
Sun 4/1910:40 pm
SAN
- PWM
2 stops10h 30m
Southwest
Deal found 1/30![Southwest logo]()
$413
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 February 1, 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 February 1, 2026.
This American Airlines deal was found by Cheapflights users on 1/30. 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 3/1812:44 pm
PWM
- SAN
1 stop9h 39m
American Airlines
Wed 3/2510:35 pm
SAN
- PWM
2 stops10h 39m
American Airlines
Deal found 1/30![American Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 2/1. 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 2/203:10 pm
PWM
- SAN
1 stop9h 15m
United Airlines
Wed 2/258:30 am
SAN
- PWM
2 stops11h 50m
United Airlines
Deal found 2/1![United Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 1/30. 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 4/283:55 pm
PWM
- SAN
1 stop9h 30m
Southwest
Sun 5/31:45 pm
SAN
- PWM
1 stop7h 20m
Southwest
Deal found 1/30![Southwest logo]()
$403
This American Airlines deal was found by Cheapflights users on 2/1. 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 2/207:10 am
PWM
- SAN
1 stop9h 13m
American Airlines
Wed 2/256:30 am
SAN
- PWM
1 stop8h 41m
American Airlines
Deal found 2/1![American Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 1/31. 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 4/214:23 pm
PWM
- SAN
1 stop9h 36m
United Airlines
Tue 4/287:14 pm
SAN
- PWM
2 stops11h 11m
United Airlines
Deal found 1/31![United Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 1/31. 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 3/23:55 pm
PWM
- SAN
1 stop8h 35m
Southwest
Mon 3/910:40 pm
SAN
- PWM
2 stops10h 15m
Southwest
Deal found 1/31![Southwest logo]()
$408
This American Airlines deal was found by Cheapflights users on 1/31. 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 3/166:17 am
PWM
- SAN
1 stop19h 23m
American Airlines
Sat 3/216:20 am
SAN
- PWM
1 stop14h 14m
American Airlines
Deal found 1/31![American Airlines logo]()
$372
This Southwest deal was found by Cheapflights users on 1/30. 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 4/143:55 pm
PWM
- SAN
1 stop9h 30m
Southwest
Sun 4/1910:40 pm
SAN
- PWM
2 stops10h 30m
Southwest
Deal found 1/30![Southwest logo]()
$408
This United Airlines deal was found by Cheapflights users on 1/30. 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 3/43:05 pm
PWM
- SAN
2 stops11h 35m
United Airlines
Sun 3/88:50 pm
SAN
- PWM
2 stops10h 59m
United Airlines
Deal found 1/30![United Airlines logo]()
$414
This American Airlines deal was found by Cheapflights users on 1/30. 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 3/136:17 am
PWM
- SAN
1 stop18h 26m
American Airlines
Tue 3/1710:35 pm
SAN
- PWM
1 stop15h 32m
American Airlines
Deal found 1/30![American Airlines logo]()
$385
This American Airlines deal was found by Cheapflights users on 1/31. 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 3/212:29 pm
PWM
- SAN
2 stops12h 10m
American Airlines
Mon 3/910:35 pm
SAN
- PWM
2 stops10h 39m
American Airlines
Deal found 1/31![American Airlines logo]()
$414
Last-minute flights from Portland to San DiegoDiscover last-minute flight deals from Portland to San Diego. Data last updated February 1, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Diego. Data last updated February 1, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 2/1. 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 2/141:15 pm
PWM
- SAN
2 stops12h 47m
Delta
Tue 3/31:13 pm
SAN
- PWM
1 stop8h 05m
Delta
Deal found 2/1![Delta logo]()
$654
This Southwest deal was found by Cheapflights users on 1/31. 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 2/153:55 pm
PWM
- SAN
1 stop8h 35m
Southwest
Wed 2/187:05 am
SAN
- PWM
1 stop12h 10m
Southwest
Deal found 1/31![Southwest logo]()
$618
This United Airlines deal was found by Cheapflights users on 1/31. 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 2/156:00 am
PWM
- SAN
2 stops15h 48m
United Airlines
Wed 2/187:45 am
SAN
- PWM
2 stops12h 35m
United Airlines
Deal found 1/31![United Airlines logo]()
$649
This Southwest deal was found by Cheapflights users on 1/30. 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 2/173:55 pm
PWM
- SAN
1 stop8h 35m
Southwest
Tue 2/249:45 pm
SAN
- PWM
1 stop11h 25m
Southwest
Deal found 1/30![Southwest logo]()
$433
This Southwest deal was found by Cheapflights users on 2/1. 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 2/171:00 pm
PWM
- SAN
1 stop11h 30m
Southwest
Tue 3/312:00 pm
SAN
- PWM
1 stop7h 15m
Southwest
Deal found 2/1![Southwest logo]()
$449
This United Airlines deal was found by Cheapflights users on 2/1. 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 2/203:10 pm
PWM
- SAN
1 stop9h 15m
United Airlines
Wed 2/258:30 am
SAN
- PWM
2 stops11h 50m
United Airlines
Deal found 2/1![United Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 2/1. 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 2/2012:13 pm
PWM
- SAN
2 stops13h 51m
Delta
Wed 2/2510:15 pm
SAN
- PWM
2 stops10h 45m
Delta
Deal found 2/1![Delta logo]()
$370
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 February 1, 2026.
Search for one-way flight options from Portland to San Diego. Find affordable one-way fares based on user searches. Data last updated February 1, 2026.
This Delta deal was found by Cheapflights users on 2/1. 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 2/242:35 pm
PWM
- SAN
1 stop9h 30m
Delta
Deal found 2/1![Delta logo]()
$180
This American Airlines deal was found by Cheapflights users on 2/1. 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 6/235:36 pm
PWM
- SAN
1 stop9h 23m
American Airlines
Deal found 2/1![American Airlines logo]()
$224
This Delta deal was found by Cheapflights users on 1/31. 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 3/2012:51 pm
PWM
- SAN
2 stops13h 23m
Delta
Deal found 1/31![Delta logo]()
$229
This United Airlines deal was found by Cheapflights users on 1/30. 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 2/246:00 am
PWM
- SAN
3 stops17h 49m
United Airlines
Deal found 1/30![United Airlines logo]()
$240
This Delta deal was found by Cheapflights users on 1/30. 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 6/233:00 pm
PWM
- SAN
2 stops11h 19m
Delta
Deal found 1/30![Delta logo]()
$255
This Southwest deal was found by Cheapflights users on 2/1. 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 2/173:55 pm
PWM
- SAN
1 stop8h 35m
Southwest
Deal found 2/1![Southwest logo]()
$270
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Sun 6/285:36 pm
PWM
- SAN
1 stop9h 23m
American Airlines
Deal found 1/29![American Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 1/31. 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 2/99:47 am
PWM
- SAN
3 stops37h 37m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$324
This Southwest deal was found by Cheapflights users on 1/31. 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 2/153:55 pm
PWM
- SAN
1 stop8h 35m
Southwest
Deal found 1/31![Southwest logo]()
$344
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 February 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $355 (American Airlines) |
One-way from | $180 (American Airlines) |
Popular in | December |
Cheapest in | September |
Average price | $545 |
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 February 1, 2026.
Use the filters below to find and compare flights from Portland to San Diego that are best for you.
Fly from
Portland
Fly to
San Diego
Route
Depart
Return
Price
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 3/18
12:44 pm-7:23 pm
1 stop9h 39m
San Diego
Wed 3/25
10:35 pm-12:14 pm
2 stops10h 39m
$364
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 2/20
3:10 pm-9:25 pm
1 stop9h 15m
San Diego
Wed 2/25
8:30 am-11:20 pm
2 stops11h 50m
$364
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 2/20
7:10 am-1:23 pm
1 stop9h 13m
San Diego
Wed 2/25
6:30 am-6:11 pm
1 stop8h 41m
$370
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Mon 3/16
6:17 am-10:40 pm
1 stop19h 23m
San Diego
Sat 3/21
6:20 am-11:34 pm
1 stop14h 14m
$372
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 3/13
6:17 am-9:43 pm
1 stop18h 26m
San Diego
Tue 3/17
10:35 pm-5:07 pm
1 stop15h 32m
$385
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 4/21
4:23 pm-10:59 pm
1 stop9h 36m
San Diego
Tue 4/28
7:14 pm-9:25 am
2 stops11h 11m
$398
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 4/28
3:55 pm-10:25 pm
1 stop9h 30m
San Diego
Sun 5/3
1:45 pm-12:05 am
1 stop7h 20m
$403
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Mon 3/2
3:55 pm-9:30 pm
1 stop8h 35m
San Diego
Mon 3/9
10:40 pm-11:55 am
2 stops10h 15m
$408
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 4/14
3:55 pm-10:25 pm
1 stop9h 30m
San Diego
Sun 4/19
10:40 pm-12:10 pm
2 stops10h 30m
$408
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 3/4
3:05 pm-11:40 pm
2 stops11h 35m
San Diego
Sun 3/8
8:50 pm-10:49 am
2 stops10h 59m
$414
Showing 1-10 of 17 results
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 February.
| 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?
Use this chart to determine the optimal time to book a round-trip flight from Portland to San Diego. Price data was last updated on January 30, 2026.
To ensure you get the cheapest price possible for a flight from Portland, Maine to San Diego, you should look to book at least 40 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, March is the cheapest month in which you can book a flight from Portland, Maine to San Diego (average of $118). Flying from Portland, Maine to San Diego in July is currently the most expensive (average of $197). 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.
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 February 1, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United 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
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
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
Chula Vista
National City
Coronado
La Mesa
Poway
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 for Portland to San Diego
See prices for flight routes from nearby airports that may be better suited for you.
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 February 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$311 | Average$467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$431 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$325 | Average$486 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$350 | Average$505 | FlexibilityNo cancel fee | On-time69% |