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$153+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SAN
nov. 26 — dic. 31
mié. 11/26
mié. 12/3
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

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Cheapflights Tip: The best prices from Portland to San Diego are usually found in January or September, booked 50 days in advance, depart on a Wednesday or Friday and return on a Saturday

Find flight deals from Portland to San Diego

Cheapest flights from Portland to San Diego
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 octubre 27, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
mié. 12/1011:16 amPWM - SAN
2 stops30h 36mMultiple Airlines
dom. 12/141:21 pmSAN - PWM
1 stop18h 20mMultiple Airlines
Deal found 10/25$347
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
vie. 12/1211:21 amPWM - SAN
2 stops15h 38mMultiple Airlines
dom. 12/141:21 pmSAN - PWM
1 stop18h 20mMultiple Airlines
Deal found 10/25$358
This Delta deal was found by Cheapflights users on 10/25. 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.
lun. 12/86:15 amPWM - SAN
1 stop8h 47mDelta
mié. 12/101:12 pmSAN - PWM
1 stop7h 47mDelta
Deal found 10/25$359
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
lun. 12/811:21 amPWM - SAN
2 stops15h 38mMultiple Airlines
jue. 12/111:21 pmSAN - PWM
1 stop18h 20mMultiple Airlines
Deal found 10/25$363
This Delta deal was found by Cheapflights users on 10/25. 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.
lun. 12/86:15 amPWM - SAN
1 stop8h 47mDelta
lun. 12/810:15 pmSAN - PWM
1 stop22h 44mDelta
Deal found 10/25$367
This Delta deal was found by Cheapflights users on 10/25. 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.
lun. 12/82:34 pmPWM - SAN
1 stop9h 31mDelta
sáb. 12/131:12 pmSAN - PWM
1 stop7h 47mDelta
Deal found 10/25$368
This Southwest deal was found by Cheapflights users on 10/25. 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.
lun. 12/812:45 pmPWM - SAN
2 stops11h 20mSouthwest
jue. 12/1110:20 amSAN - PWM
2 stops8h 55mSouthwest
Deal found 10/25$369
This Delta deal was found by Cheapflights users on 10/25. 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.
mié. 12/106:08 amPWM - SAN
1 stop9h 54mDelta
dom. 12/1410:15 pmSAN - PWM
1 stop22h 44mDelta
Deal found 10/25$375
This Delta deal was found by Cheapflights users on 10/25. 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.
sáb. 11/151:25 pmPWM - SAN
1 stop10h 54mDelta
mar. 11/181:12 pmSAN - PWM
1 stop7h 42mDelta
Deal found 10/25$377

Cheap 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 octubre 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$333
(Delta)

One-way from

$153
(Southwest)

Popular in

April

Cheapest in

January

Average price

$483
Provider with most accurate pricing for Portland-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-San Diego flights.
Search Deals
From Portland to San Diego
Search Deals
One-way flight from Portland to San Diego
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 octubre 27, 2025.
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

mié. 1/14

6:17 am-12:17 pm

1 stop9h 00m

San Diego

dom. 1/18

6:30 am-10:29 pm

2 stops12h 59m

$337

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

mié. 2/11

12:20 pm-10:47 pm

2 stops13h 27m

San Diego

mié. 2/18

6:15 am-11:05 pm

2 stops13h 50m

$342

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

vie. 12/12

11:21 am-11:59 pm

2 stops15h 38m

San Diego

dom. 12/14

1:21 pm-10:41 am

1 stop18h 20m

$358

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

lun. 12/8

3:30 pm-9:35 pm

1 stop9h 05m

San Diego

jue. 12/11

9:45 pm-11:10 am

1 stop10h 25m

$359

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

mié. 2/4

12:45 pm-9:00 pm

1 stop11h 15m

San Diego

mar. 2/10

12:00 pm-10:15 pm

1 stop7h 15m

$359

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

jue. 12/11

5:30 am-3:15 pm

1 stop12h 45m

San Diego

jue. 12/11

9:45 pm-11:10 am

1 stop10h 25m

$364

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

mié. 12/10

6:08 am-1:02 pm

1 stop9h 54m

San Diego

mié. 12/10

10:00 pm-1:54 pm

2 stops12h 54m

$364

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

mar. 12/9

2:34 pm-9:05 pm

1 stop9h 31m

San Diego

sáb. 12/13

1:12 pm-11:59 pm

1 stop7h 47m

$368

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

mié. 12/10

2:34 pm-9:05 pm

1 stop9h 31m

San Diego

sáb. 12/13

11:05 am-10:23 pm

1 stop8h 18m

$368

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

mar. 2/3

12:45 pm-9:50 pm

2 stops12h 05m

San Diego

mar. 2/10

8:35 am-10:15 pm

2 stops10h 40m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 21 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-San Diego flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-San Diego flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.
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 October 24, 2025.

To ensure you get the cheapest price possible for a flight from Portland, Maine to San Diego, you should look to book at least 49 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 $114). 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 octubre 27, 2025.
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.
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
7,996 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,997 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,033 reviews
Southwest
8.0
Very good
4,236 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • How long is the flight from Portland, Maine to San Diego?

    For as low as $337, Delta can have you in San Diego from Portland, Maine in 9h. The distance between Portland, Maine and San Diego is about 2616 mi.

  • What are the cheapest airlines flying from Portland, Maine to San Diego round-trip?

    American Airlines, at $312, was found to be the cheapest airline from Portland, Maine to San Diego.Alternate airlines to your destination round-trip include Delta and Southwest. These flights start at 37% lower than the current average price 3 months from now.

  • Can I find deals for flights from Portland to San Diego that include hotel bookings?

    Yes. In addition to deals on Portland to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to San Diego.

  • Can I find deals for business class flights from Portland to San Diego?

    Yes. Cheapflights offers flight deals from Portland to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $114). 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.

See more FAQs

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
Lemon Grove
Imperial Beach
National City

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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 octubre 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$312Average$441FlexibilityNo cancel feeOn-time71%
DeltaCheapest$316Average$465FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$325Average$496FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$365Average$524FlexibilityNo cancel feeOn-time69%

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