$166+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAN
Apr 12 — Apr 191
Round-trip
1 adult, Economy
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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
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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
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Last-minute
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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 March 13, 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 March 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:01 pm
PWM
- SAN
1 stop21h 23m
Breeze Airways
Sat 9/121:22 pm
SAN
- PWM
1 stop27h 20m
Breeze Airways
Deal found 3/12![Breeze Airways logo]()
$319
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Tue 4/74:28 pm
PWM
- SAN
1 stop9h 31m
United Airlines
Tue 4/1410:52 am
SAN
- PWM
1 stop7h 48m
United Airlines
Deal found 3/10![United Airlines logo]()
$367
This Southwest deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:50 pm
PWM
- SAN
1 stop9h 35m
Southwest
Tue 4/1410:40 pm
SAN
- PWM
2 stops10h 40m
Southwest
Deal found 3/10![Southwest logo]()
$372
This Delta deal was found by Cheapflights users on 3/11. 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 4/302:51 pm
PWM
- SAN
1 stop8h 56m
Delta
Tue 5/51:23 pm
SAN
- PWM
1 stop8h 23m
Delta
Deal found 3/11![Delta logo]()
$373
This Delta deal was found by Cheapflights users on 3/8. 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 4/132:51 pm
PWM
- SAN
1 stop12h 04m
Delta
Mon 4/279:45 pm
SAN
- PWM
2 stops10h 17m
Delta
Deal found 3/8![Delta logo]()
$376
This Southwest deal was found by Cheapflights users on 3/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:55 pm
PWM
- SAN
2 stops9h 45m
Southwest
Tue 5/129:15 am
SAN
- PWM
2 stops10h 20m
Southwest
Deal found 3/11![Southwest logo]()
$377
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/114:48 pm
PWM
- SAN
1 stop9h 11m
Delta
Wed 4/1510:10 pm
SAN
- PWM
2 stops13h 01m
Delta
Deal found 3/9![Delta logo]()
$378
This American Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/253:02 pm
PWM
- SAN
1 stop11h 08m
American Airlines
Thu 4/3010:30 pm
SAN
- PWM
1 stop8h 53m
American Airlines
Deal found 3/11![American Airlines logo]()
$379
This American Airlines deal was found by Cheapflights users on 3/10. 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 4/113:02 pm
PWM
- SAN
1 stop11h 08m
American Airlines
Wed 4/1512:03 pm
SAN
- PWM
1 stop7h 43m
American Airlines
Deal found 3/10![American Airlines logo]()
$380
This Delta deal was found by Cheapflights users on 3/8. 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 4/1412:46 pm
PWM
- SAN
1 stop8h 33m
Delta
Mon 4/279:45 pm
SAN
- PWM
2 stops10h 17m
Delta
Deal found 3/8![Delta logo]()
$384
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 March 13, 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 March 13, 2026.
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:00 am
PWM
- SAN
1 stop8h 25m
United Airlines
Thu 4/307:00 pm
SAN
- PWM
2 stops10h 49m
United Airlines
Deal found 3/12![United Airlines logo]()
$384
This Delta deal was found by Cheapflights users on 3/10. 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.
Thu 4/234:43 pm
PWM
- SAN
1 stop9h 23m
Delta
Tue 5/126:15 am
SAN
- PWM
2 stops13h 57m
Delta
Deal found 3/10![Delta logo]()
$388
This Southwest deal was found by Cheapflights users on 3/10. 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.
Fri 4/242:50 pm
PWM
- SAN
2 stops11h 15m
Southwest
Sat 5/98:55 am
SAN
- PWM
2 stops11h 15m
Southwest
Deal found 3/10![Southwest logo]()
$443
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:30 am
PWM
- SAN
1 stop20h 13m
Delta
Mon 7/2710:10 pm
SAN
- PWM
1 stop22h 49m
Delta
Deal found 3/9![Delta logo]()
$478
This Southwest deal was found by Cheapflights users on 3/10. 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.
Sun 5/246:00 am
PWM
- SAN
2 stops11h 15m
Southwest
Tue 6/28:40 am
SAN
- PWM
2 stops10h 55m
Southwest
Deal found 3/10![Southwest logo]()
$479
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/163:23 pm
PWM
- SAN
2 stops11h 36m
United Airlines
Thu 5/2112:57 pm
SAN
- PWM
1 stop7h 54m
United Airlines
Deal found 3/11![United Airlines logo]()
$506
This Southwest deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/231:00 pm
PWM
- SAN
1 stop9h 15m
Southwest
Sun 7/2610:40 pm
SAN
- PWM
1 stop12h 50m
Southwest
Deal found 3/9![Southwest logo]()
$494
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/136:33 pm
PWM
- SAN
2 stops17h 43m
United Airlines
Thu 4/3010:40 pm
SAN
- PWM
1 stop8h 43m
United Airlines
Deal found 3/8![United Airlines logo]()
$522
This Southwest deal was found by Cheapflights users on 3/8. 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 6/55:35 am
PWM
- SAN
2 stops10h 10m
Southwest
Mon 6/159:45 am
SAN
- PWM
2 stops9h 25m
Southwest
Deal found 3/8![Southwest logo]()
$537
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:33 pm
PWM
- SAN
2 stops17h 11m
United Airlines
Tue 4/216:20 pm
SAN
- PWM
2 stops12h 05m
United Airlines
Deal found 3/10![United Airlines logo]()
$561
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:33 pm
PWM
- SAN
2 stops17h 11m
United Airlines
Mon 4/208:37 pm
SAN
- PWM
2 stops10h 45m
United Airlines
Deal found 3/11![United Airlines logo]()
$567
Last-minute flights from Portland to San DiegoDiscover last-minute flight deals from Portland to San Diego. Data last updated March 13, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Diego. Data last updated March 13, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Tue 4/74:28 pm
PWM
- SAN
1 stop9h 31m
United Airlines
Tue 4/1410:52 am
SAN
- PWM
1 stop7h 48m
United Airlines
Deal found 3/10![United Airlines logo]()
$367
This Southwest deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:50 pm
PWM
- SAN
1 stop9h 35m
Southwest
Tue 4/1410:40 pm
SAN
- PWM
2 stops10h 40m
Southwest
Deal found 3/10![Southwest logo]()
$372
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/114:48 pm
PWM
- SAN
1 stop9h 11m
Delta
Wed 4/1510:10 pm
SAN
- PWM
2 stops13h 01m
Delta
Deal found 3/9![Delta logo]()
$378
This American Airlines deal was found by Cheapflights users on 3/10. 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 4/113:02 pm
PWM
- SAN
1 stop11h 08m
American Airlines
Wed 4/1512:03 pm
SAN
- PWM
1 stop7h 43m
American Airlines
Deal found 3/10![American Airlines logo]()
$380
This Delta deal was found by Cheapflights users on 3/8. 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 4/132:51 pm
PWM
- SAN
1 stop12h 04m
Delta
Mon 4/279:45 pm
SAN
- PWM
2 stops10h 17m
Delta
Deal found 3/8![Delta logo]()
$376
This Delta deal was found by Cheapflights users on 3/8. 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 4/1412:46 pm
PWM
- SAN
1 stop8h 33m
Delta
Mon 4/279:45 pm
SAN
- PWM
2 stops10h 17m
Delta
Deal found 3/8![Delta logo]()
$384
This American Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/253:02 pm
PWM
- SAN
1 stop11h 08m
American Airlines
Thu 4/3010:30 pm
SAN
- PWM
1 stop8h 53m
American Airlines
Deal found 3/11![American Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 3/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:55 pm
PWM
- SAN
2 stops9h 45m
Southwest
Tue 5/129:15 am
SAN
- PWM
2 stops10h 20m
Southwest
Deal found 3/11![Southwest logo]()
$377
This Delta deal was found by Cheapflights users on 3/11. 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 4/302:51 pm
PWM
- SAN
1 stop8h 56m
Delta
Tue 5/51:23 pm
SAN
- PWM
1 stop8h 23m
Delta
Deal found 3/11![Delta logo]()
$373
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 March 13, 2026.
Search for one-way flight options from Portland to San Diego. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 9/84:44 pm
PWM
- SAN
1 stop22h 46m
Breeze Airways
Deal found 3/8![Breeze Airways logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:01 pm
PWM
- SAN
1 stop21h 23m
Breeze Airways
Deal found 3/8![Breeze Airways logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/153:51 pm
PWM
- SAN
2 stops34h 15m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 3/10. 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.
Wed 4/154:43 pm
PWM
- SAN
1 stop9h 23m
Delta
Deal found 3/10![Delta logo]()
$184
This Delta deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/44:48 pm
PWM
- SAN
1 stop9h 11m
Delta
Deal found 3/9![Delta logo]()
$190
This Booking.com deal was found by Cheapflights users on 3/8. 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.
Fri 7/1011:16 am
PWM
- SAN
1 stop8h 26m
Sun Country Air
Deal found 3/8![Sun Country Air logo]()
$233
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Fri 5/1511:56 am
PWM
- SAN
1 stop10h 04m
American Airlines
Deal found 3/10![American Airlines logo]()
$234
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 March 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $319 (Kiwi.com) |
One-way from | $166 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $602 |
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 March 13, 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
Quickest round-trip
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 4/25
6:00 am-11:25 am
1 stop8h 25m
San Diego
Thu 4/30
7:00 pm-8:49 am
2 stops10h 49m
$384
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Thu 4/23
4:43 pm-11:06 pm
1 stop9h 23m
San Diego
Tue 5/12
6:15 am-11:12 pm
2 stops13h 57m
$388
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 4/24
2:50 pm-11:05 pm
2 stops11h 15m
San Diego
Sat 5/9
8:55 am-11:10 pm
2 stops11h 15m
$443
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Thu 7/23
6:30 am-11:43 pm
1 stop20h 13m
San Diego
Mon 7/27
10:10 pm-11:59 pm
1 stop22h 49m
$478
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sun 5/24
6:00 am-2:15 pm
2 stops11h 15m
San Diego
Tue 6/2
8:40 am-10:35 pm
2 stops10h 55m
$479
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Thu 7/23
1:00 pm-7:15 pm
1 stop9h 15m
San Diego
Sun 7/26
10:40 pm-2:30 pm
1 stop12h 50m
$494
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 5/16
3:23 pm-11:59 pm
2 stops11h 36m
San Diego
Thu 5/21
12:57 pm-11:51 pm
1 stop7h 54m
$506
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Mon 4/13
6:33 pm-9:16 am
2 stops17h 43m
San Diego
Thu 4/30
10:40 pm-10:23 am
1 stop8h 43m
$522
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 6/5
5:35 am-12:45 pm
2 stops10h 10m
San Diego
Mon 6/15
9:45 am-10:10 pm
2 stops9h 25m
$537
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 4/18
6:33 pm-8:44 am
2 stops17h 11m
San Diego
Tue 4/21
6:20 pm-9:25 am
2 stops12h 05m
$561
Showing 1-10 of 21 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 March.
| 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 March 6, 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 44 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 February 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 March 13, 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.
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
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.
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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 March 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$311 | Average$467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$430 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$325 | Average$466 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$350 | Average$503 | FlexibilityNo cancel fee | On-time69% |