$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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAN
Aug 31 — Sep 71
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 August 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 August 1, 2026.
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:15 am
PWM
- SAN
1 stop9h 10m
United Airlines
Mon 9/219:45 pm
SAN
- PWM
1 stop9h 19m
United Airlines
Deal found 7/29![United Airlines logo]()
$333
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 10/65:45 pm
PWM
- SAN
1 stop8h 56m
American Airlines
Sat 10/1010:53 pm
SAN
- PWM
1 stop10h 18m
American Airlines
Deal found 7/29![American Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 am
PWM
- SAN
1 stop8h 25m
Delta
Mon 9/217:53 pm
SAN
- PWM
2 stops11h 52m
Delta
Deal found 7/29![Delta logo]()
$338
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:28 am
PWM
- SAN
2 stops10h 52m
Delta
Sat 11/146:15 am
SAN
- PWM
2 stops14h 40m
Delta
Deal found 7/28![Delta logo]()
$343
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:30 am
PWM
- SAN
2 stops13h 35m
Delta
Mon 9/217:53 pm
SAN
- PWM
2 stops11h 52m
Delta
Deal found 7/28![Delta logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:09 pm
PWM
- SAN
2 stops27h 51m
Multiple Airlines
Tue 9/151:22 pm
SAN
- PWM
1 stop24h 02m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 7/31. 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.
Fri 9/112:10 pm
PWM
- SAN
1 stop7h 40m
Southwest
Wed 9/1610:40 pm
SAN
- PWM
1 stop9h 15m
Southwest
Deal found 7/31![Southwest logo]()
$351
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Wed 9/93:43 pm
PWM
- SAN
1 stop10h 06m
United Airlines
Tue 9/159:05 pm
SAN
- PWM
1 stop9h 03m
United Airlines
Deal found 8/1![United Airlines logo]()
$356
This Delta deal was found by Cheapflights users on 8/1. 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.
Wed 9/96:30 am
PWM
- SAN
2 stops15h 56m
Delta
Tue 9/156:20 am
SAN
- PWM
2 stops13h 57m
Delta
Deal found 8/1![Delta logo]()
$366
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:55 pm
PWM
- SAN
2 stops12h 39m
Delta
Tue 9/2212:52 pm
SAN
- PWM
1 stop7h 36m
Delta
Deal found 7/29![Delta logo]()
$371
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 August 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 August 1, 2026.
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:40 am
PWM
- SAN
2 stops13h 34m
Delta
Wed 12/211:03 am
SAN
- PWM
2 stops9h 52m
Delta
Deal found 7/29![Delta logo]()
$343
This United Airlines deal was found by Cheapflights users on 7/30. 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 10/283:23 pm
PWM
- SAN
1 stop8h 13m
United Airlines
Sat 10/3110:20 pm
SAN
- PWM
1 stop8h 40m
United Airlines
Deal found 7/30![United Airlines logo]()
$443
This Delta deal was found by Cheapflights users on 7/30. 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 10/66:04 am
PWM
- SAN
2 stops12h 00m
Delta
Sat 10/106:15 am
SAN
- PWM
2 stops11h 46m
Delta
Deal found 7/30![Delta logo]()
$426
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:40 am
PWM
- SAN
2 stops16h 05m
United Airlines
Sat 8/299:45 pm
SAN
- PWM
1 stop9h 19m
United Airlines
Deal found 7/27![United Airlines logo]()
$448
This Delta deal was found by Cheapflights users on 7/31. 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.
Tue 10/204:15 pm
PWM
- SAN
1 stop10h 31m
Delta
Sun 10/2510:00 pm
SAN
- PWM
2 stops12h 02m
Delta
Deal found 7/31![Delta logo]()
$438
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am
PWM
- SAN
1 stop8h 25m
United Airlines
Sat 10/1012:40 pm
SAN
- PWM
3 stops17h 28m
United Airlines
Deal found 7/29![United Airlines logo]()
$454
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 am
PWM
- SAN
2 stops14h 28m
United Airlines
Tue 9/2912:40 pm
SAN
- PWM
3 stops17h 28m
United Airlines
Deal found 7/28![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 7/31. 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 10/2311:25 am
PWM
- SAN
2 stops12h 53m
Delta
Sun 10/2510:30 pm
SAN
- PWM
2 stops10h 27m
Delta
Deal found 7/31![Delta logo]()
$475
Last-minute flights from Portland to San DiegoDiscover last-minute flight deals from Portland to San Diego. Data last updated August 1, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Diego. Data last updated August 1, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:56 am
PWM
- SAN
1 stop11h 19m
American Airlines
Mon 8/2410:45 pm
SAN
- PWM
1 stop9h 53m
American Airlines
Deal found 7/28![American Airlines logo]()
$383
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:30 am
PWM
- SAN
2 stops10h 05m
Southwest
Mon 8/2410:40 pm
SAN
- PWM
1 stop8h 15m
Southwest
Deal found 7/28![Southwest logo]()
$388
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2111:50 am
PWM
- SAN
2 stops9h 16m
Delta
Mon 8/2410:17 pm
SAN
- PWM
2 stops12h 56m
Delta
Deal found 7/28![Delta logo]()
$393
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Wed 8/2610:56 am
PWM
- SAN
1 stop11h 19m
American Airlines
Wed 9/26:15 am
SAN
- PWM
1 stop8h 55m
American Airlines
Deal found 8/1![American Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Wed 8/267:40 am
PWM
- SAN
2 stops10h 10m
United Airlines
Wed 9/26:40 am
SAN
- PWM
1 stop8h 02m
United Airlines
Deal found 8/1![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 8/1. 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.
Wed 8/2611:01 am
PWM
- SAN
2 stops14h 59m
Delta
Wed 9/26:15 am
SAN
- PWM
2 stops13h 58m
Delta
Deal found 8/1![Delta logo]()
$380
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 8/295:30 am
PWM
- SAN
1 stop8h 36m
American Airlines
Sat 9/56:15 am
SAN
- PWM
1 stop8h 50m
American Airlines
Deal found 7/30![American Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:05 am
PWM
- SAN
1 stop8h 04m
Delta
Sat 9/266:15 am
SAN
- PWM
2 stops14h 41m
Delta
Deal found 7/29![Delta logo]()
$338
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Sat 8/294:07 pm
PWM
- SAN
1 stop8h 15m
American Airlines
Sat 9/267:32 am
SAN
- PWM
2 stops11h 24m
American Airlines
Deal found 8/1![American Airlines logo]()
$397
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 August 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 August 1, 2026.
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:00 am
PWM
- SAN
1 stop8h 25m
Delta
Deal found 7/28![Delta logo]()
$167
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:00 am
PWM
- SAN
1 stop8h 38m
Delta
Deal found 7/29![Delta logo]()
$172
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:55 pm
PWM
- SAN
2 stops13h 00m
Delta
Deal found 7/28![Delta logo]()
$177
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:51 am
PWM
- SAN
2 stops10h 53m
United Airlines
Deal found 7/29![United Airlines logo]()
$187
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 9/145:38 pm
PWM
- SAN
1 stop8h 47m
American Airlines
Deal found 7/29![American Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:00 am
PWM
- SAN
3 stops28h 18m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$213
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 9/253:40 pm
PWM
- SAN
1 stop9h 47m
United Airlines
Deal found 7/31![United Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:00 am
PWM
- SAN
3 stops35h 59m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$219
This Southwest deal was found by Cheapflights users on 7/31. 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.
Fri 9/253:40 pm
PWM
- SAN
2 stops9h 20m
Southwest
Deal found 7/31![Southwest logo]()
$222
This Southwest deal was found by Cheapflights users on 7/31. 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 10/125:20 am
PWM
- SAN
2 stops10h 20m
Southwest
Deal found 7/31![Southwest logo]()
$254
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 August 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $333 (United Airlines) |
One-way from | $167 (Delta) |
Popular in | March |
Cheapest in | January |
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 August 1, 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
Wed 11/18
11:40 am-10:14 pm
2 stops13h 34m
San Diego
Wed 12/2
11:03 am-11:55 pm
2 stops9h 52m
$343
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 10/6
6:04 am-3:04 pm
2 stops12h 00m
San Diego
Sat 10/10
6:15 am-9:01 pm
2 stops11h 46m
$426
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 10/20
4:15 pm-11:46 pm
1 stop10h 31m
San Diego
Sun 10/25
10:00 pm-1:02 pm
2 stops12h 02m
$438
Quickest round-trip
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 10/28
3:23 pm-8:36 pm
1 stop8h 13m
San Diego
Sat 10/31
10:20 pm-10:00 am
1 stop8h 40m
$443
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Wed 8/26
7:40 am-8:45 pm
2 stops16h 05m
San Diego
Sat 8/29
9:45 pm-10:04 am
1 stop9h 19m
$448
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 10/6
6:00 am-11:25 am
1 stop8h 25m
San Diego
Sat 10/10
12:40 pm-9:08 am
3 stops17h 28m
$454
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 9/15
6:00 am-5:28 pm
2 stops14h 28m
San Diego
Tue 9/29
12:40 pm-9:08 am
3 stops17h 28m
$459
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 10/23
11:25 am-9:18 pm
2 stops12h 53m
San Diego
Sun 10/25
10:30 pm-11:57 am
2 stops10h 27m
$475
Cheapest one-way
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 9/12
6:02 am-11:36 am
1 stop8h 34m
$167
Quickest one-way
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 9/15
6:00 am-11:25 am
1 stop8h 25m
$167
Showing 1-10 of 19 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 August.
| 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 83 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, January is the cheapest month in which you can book a flight from Portland, Maine to San Diego (average of $421). 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?
Airfare is below average for this route at the moment.
Portland, Maine to San Diego flights typically cost between $397 and $576 in September.The cheapest round-trip price found within the last 5 days was $333 on United Airlines (Sep 12-Sep 21).
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 August 1, 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.
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
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 August 1, 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 August 1, 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 August 1, 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 August 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$311 | Average$467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$312 | Average$497 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$325 | Average$497 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$365 | Average$526 | FlexibilityNo cancel fee | On-time69% |