$138+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAN
Aug 7 — Aug 141
Round-trip
1 adult, Economy
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Find cheap flights from Portland to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Portland to San Diego
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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 8, 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 8, 2026.
This American Airlines deal was found by Cheapflights users on 7/7. 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 8/186:09 pm
PWM
- SAN
1 stop8h 38m
American Airlines
Tue 8/257:15 am
SAN
- PWM
1 stop8h 37m
American Airlines
Deal found 7/7![American Airlines logo]()
$275
This Delta deal was found by Cheapflights users on 7/8. 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.
Thu 11/122:35 pm
PWM
- SAN
1 stop9h 14m
Delta
Mon 11/1610:40 pm
SAN
- PWM
1 stop10h 38m
Delta
Deal found 7/8![Delta logo]()
$297
This American Airlines deal was found by Cheapflights users on 7/8. 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 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 7/8![American Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 7/7. 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 12/92:35 pm
PWM
- SAN
1 stop9h 14m
Delta
Tue 12/1510:10 pm
SAN
- PWM
1 stop8h 20m
Delta
Deal found 7/7![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 7/7. 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 12/96:00 am
PWM
- SAN
1 stop10h 08m
Delta
Wed 12/1610:40 pm
SAN
- PWM
2 stops14h 30m
Delta
Deal found 7/7![Delta logo]()
$316
This American Airlines deal was found by Cheapflights users on 7/7. 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.
Thu 9/33:06 pm
PWM
- SAN
1 stop8h 29m
American Airlines
Mon 9/710:45 pm
SAN
- PWM
1 stop9h 53m
American Airlines
Deal found 7/7![American Airlines logo]()
$323
This Delta deal was found by Cheapflights users on 7/8. 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 8/116:05 am
PWM
- SAN
1 stop9h 28m
Delta
Tue 8/188:00 am
SAN
- PWM
2 stops12h 30m
Delta
Deal found 7/8![Delta logo]()
$331
This Delta deal was found by Cheapflights users on 7/7. 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 12/116:00 am
PWM
- SAN
1 stop10h 08m
Delta
Wed 12/1610:10 pm
SAN
- PWM
1 stop8h 20m
Delta
Deal found 7/7![Delta logo]()
$355
This American Airlines deal was found by Cheapflights users on 7/3. 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 8/2510:56 am
PWM
- SAN
1 stop11h 19m
American Airlines
Mon 8/316:15 am
SAN
- PWM
1 stop8h 17m
American Airlines
Deal found 7/3![American Airlines logo]()
$359
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 8, 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 8, 2026.
This Delta deal was found by Cheapflights users on 7/7. 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 8/1811:01 am
PWM
- SAN
2 stops14h 59m
Delta
Tue 8/256:15 am
SAN
- PWM
2 stops13h 58m
Delta
Deal found 7/7![Delta logo]()
$321
This American Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:05 am
PWM
- SAN
1 stop8h 43m
American Airlines
Sat 9/2610:04 am
SAN
- PWM
1 stop10h 43m
American Airlines
Deal found 7/4![American Airlines logo]()
$487
This Southwest deal was found by Cheapflights users on 7/7. 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 9/143:40 pm
PWM
- SAN
1 stop10h 05m
Southwest
Thu 9/179:00 pm
SAN
- PWM
2 stops9h 50m
Southwest
Deal found 7/7![Southwest logo]()
$492
This Delta deal was found by Cheapflights users on 7/3. 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 8/256:05 am
PWM
- SAN
1 stop8h 02m
Delta
Mon 8/3110:25 pm
SAN
- PWM
2 stops14h 36m
Delta
Deal found 7/3![Delta logo]()
$364
This Delta deal was found by Cheapflights users on 7/3. 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 10/26:30 am
PWM
- SAN
2 stops10h 40m
Delta
Tue 10/66:15 am
SAN
- PWM
2 stops14h 21m
Delta
Deal found 7/3![Delta logo]()
$433
This American Airlines deal was found by Cheapflights users on 7/5. 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 8/113:06 pm
PWM
- SAN
1 stop8h 29m
American Airlines
Tue 8/186:15 am
SAN
- PWM
1 stop8h 51m
American Airlines
Deal found 7/5![American Airlines logo]()
$487
This Delta deal was found by Cheapflights users on 7/8. 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 8/116:30 am
PWM
- SAN
2 stops13h 35m
Delta
Tue 8/187:59 pm
SAN
- PWM
2 stops11h 46m
Delta
Deal found 7/8![Delta logo]()
$467
This Delta deal was found by Cheapflights users on 7/4. 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 8/256:00 am
PWM
- SAN
2 stops12h 56m
Delta
Sun 8/309:30 pm
SAN
- PWM
2 stops15h 31m
Delta
Deal found 7/4![Delta logo]()
$497
This Delta deal was found by Cheapflights users on 7/6. 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
2 stops12h 05m
Delta
Sat 9/2610:25 pm
SAN
- PWM
2 stops10h 45m
Delta
Deal found 7/6![Delta logo]()
$497
Last-minute flights from Portland to San DiegoDiscover last-minute flight deals from Portland to San Diego. Data last updated July 8, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to San Diego. Data last updated July 8, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/8. 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 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 7/8![American Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 7/8. 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 8/116:05 am
PWM
- SAN
1 stop9h 28m
Delta
Tue 8/188:00 am
SAN
- PWM
2 stops12h 30m
Delta
Deal found 7/8![Delta logo]()
$331
This American Airlines deal was found by Cheapflights users on 7/7. 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 8/186:09 pm
PWM
- SAN
1 stop8h 38m
American Airlines
Tue 8/257:15 am
SAN
- PWM
1 stop8h 37m
American Airlines
Deal found 7/7![American Airlines logo]()
$275
This Delta deal was found by Cheapflights users on 7/7. 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 8/186:05 am
PWM
- SAN
1 stop8h 02m
Delta
Tue 8/256:29 am
SAN
- PWM
2 stops13h 44m
Delta
Deal found 7/7![Delta logo]()
$316
This Expedia deal was found by Cheapflights users on 7/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:00 am
PWM
- SAN
2 stops16h 29m
JetBlue
Fri 9/1110:40 am
SAN
- PWM
1 stop10h 12m
JetBlue
Deal found 7/6![JetBlue logo]()
$370
This United Airlines deal was found by Cheapflights users on 7/6. 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 8/202:38 pm
PWM
- SAN
1 stop8h 51m
United Airlines
Fri 9/1110:25 pm
SAN
- PWM
1 stop7h 43m
United Airlines
Deal found 7/6![United Airlines logo]()
$410
This American Airlines deal was found by Cheapflights users on 7/3. 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 8/2510:56 am
PWM
- SAN
1 stop11h 19m
American Airlines
Mon 8/316:15 am
SAN
- PWM
1 stop8h 17m
American Airlines
Deal found 7/3![American Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 7/3. 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 8/256:05 am
PWM
- SAN
1 stop8h 02m
Delta
Mon 8/3110:25 pm
SAN
- PWM
2 stops14h 36m
Delta
Deal found 7/3![Delta logo]()
$364
This American Airlines deal was found by Cheapflights users on 7/7. 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 8/253:06 pm
PWM
- SAN
1 stop8h 29m
American Airlines
Sun 8/309:36 pm
SAN
- PWM
1 stop9h 55m
American Airlines
Deal found 7/7![American Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 7/7. 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 8/256:05 am
PWM
- SAN
1 stop9h 28m
Delta
Sun 8/309:30 pm
SAN
- PWM
2 stops15h 31m
Delta
Deal found 7/7![Delta logo]()
$404
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 8, 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 8, 2026.
This American Airlines deal was found by Cheapflights users on 7/7. 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.
Thu 8/208:00 am
PWM
- SAN
1 stop9h 15m
American Airlines
Deal found 7/7![American Airlines logo]()
$138
This Delta deal was found by Cheapflights users on 7/7. 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 8/186:05 am
PWM
- SAN
1 stop8h 02m
Delta
Deal found 7/7![Delta logo]()
$149
This American Airlines deal was found by Cheapflights users on 7/7. 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 7/7![American Airlines logo]()
$156
This Delta deal was found by Cheapflights users on 7/7. 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 8/202:14 pm
PWM
- SAN
2 stops12h 40m
Delta
Deal found 7/7![Delta logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 9/235:09 pm
PWM
- SAN
3 stops33h 50m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 8/265:01 pm
PWM
- SAN
3 stops25h 40m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$239
This Delta deal was found by Cheapflights users on 7/4. 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
1 stop11h 50m
Delta
Deal found 7/4![Delta logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/184:44 pm
PWM
- SAN
3 stops43h 21m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Fri 8/216:29 pm
PWM
- SAN
3 stops24h 12m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$253
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 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $275 (American Airlines) |
One-way from | $138 (American 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 8, 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 8/18
11:01 am-11:00 pm
2 stops14h 59m
San Diego
Tue 8/25
6:15 am-11:13 pm
2 stops13h 58m
$321
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 8/25
6:05 am-11:07 am
1 stop8h 02m
San Diego
Mon 8/31
10:25 pm-4:01 pm
2 stops14h 36m
$364
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Fri 10/2
6:30 am-2:10 pm
2 stops10h 40m
San Diego
Tue 10/6
6:15 am-11:36 pm
2 stops14h 21m
$433
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 8/11
6:30 am-5:05 pm
2 stops13h 35m
San Diego
Tue 8/18
7:59 pm-10:45 am
2 stops11h 46m
$467
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 8/29
7:05 am-12:48 pm
1 stop8h 43m
San Diego
Sat 9/26
10:04 am-11:47 pm
1 stop10h 43m
$487
Quickest round-trip
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 8/11
3:06 pm-8:35 pm
1 stop8h 29m
San Diego
Tue 8/18
6:15 am-6:06 pm
1 stop8h 51m
$487
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Mon 9/14
3:40 pm-10:45 pm
1 stop10h 05m
San Diego
Thu 9/17
9:00 pm-9:50 am
2 stops9h 50m
$492
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Tue 8/25
6:00 am-3:56 pm
2 stops12h 56m
San Diego
Sun 8/30
9:30 pm-4:01 pm
2 stops15h 31m
$497
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 8/29
6:05 am-3:10 pm
2 stops12h 05m
San Diego
Sat 9/26
10:25 pm-12:10 pm
2 stops10h 45m
$497
Cheapest one-way
PortlandSan Diego
PWM - SAN
PWMSAN
Portland
Sat 8/22
6:05 am-12:33 pm
1 stop9h 28m
$149
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 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 8, 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.
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Overall
7.9
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
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
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Coronado
Santee
San Ysidro
Julian
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Portland and San Diego flights
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Top 4 airlines flying from Portland to San Diego
Discover the top 4 airlines that operate flights from Portland to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 8, 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% |