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Cheap flights from Portland, Maine to San Diego from $210

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to San Diego departing on 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portland, Maine to San Diego

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:05 am - 11:07 am
PWM
-
SAN
8h 02m
1 stop
Delta Logo
10:49 am - 11:20 pm
SAN
-
PWM
9h 31m
1 stop
$419Delta
Wed, Aug 12 - Wed, Aug 19
Delta Logo
6:05 am - 11:07 am
PWM
-
SAN
8h 02m
1 stop
Delta Logo
10:49 am - 12:59 am
SAN
-
PWM
11h 10m
2 stops
$424Delta
Wed, Aug 12 - Wed, Aug 19
Delta Logo
6:05 am - 6:06 pm
PWM
-
SAN
15h 01m
2 stops
Delta Logo
6:15 am - 11:20 pm
SAN
-
PWM
14h 05m
2 stops
$429Delta
Wed, Aug 12 - Wed, Aug 19
Delta Logo
6:00 am - 11:38 am
PWM
-
SAN
8h 38m
1 stop
Delta Logo
1:10 pm - 12:59 am
SAN
-
PWM
8h 49m
1 stop
$431Delta
Wed, Aug 5 - Tue, Aug 11
Delta Logo
6:00 am - 11:38 am
PWM
-
SAN
8h 38m
1 stop
Delta Logo
6:15 am - 11:20 pm
SAN
-
PWM
14h 05m
2 stops
$436Delta
Wed, Aug 5 - Wed, Aug 12
American Airlines Logo
5:32 pm - 11:59 pm
PWM
-
SAN
9h 27m
1 stop
American Airlines Logo
9:41 am - 11:51 pm
SAN
-
PWM
11h 10m
2 stops
$441American Airlines
Tue, Aug 4 - Tue, Aug 11
Delta Logo
6:00 am - 11:38 am
PWM
-
SAN
8h 38m
1 stop
Delta Logo
1:10 pm - 12:59 am
SAN
-
PWM
8h 49m
1 stop
$443Delta
Wed, Aug 5 - Mon, Aug 10
Delta Logo
6:00 am - 11:38 am
PWM
-
SAN
8h 38m
1 stop
Delta Logo
7:58 pm - 10:45 am
SAN
-
PWM
11h 47m
2 stops
$448Delta
Wed, Aug 5 - Thu, Aug 13
Delta Logo
6:00 am - 12:45 pm
PWM
-
SAN
9h 45m
1 stop
Delta Logo
10:55 am - 10:33 pm
SAN
-
PWM
8h 38m
1 stop
$453Delta
Tue, Sep 22 - Fri, Sep 25
Delta Logo
6:30 am - 12:02 pm
PWM
-
SAN
8h 32m
1 stop
Delta Logo
11:50 am - 11:01 am
SAN
-
PWM
20h 11m
2 stops
$456Delta
Tue, Sep 22 - Fri, Sep 25

Delta flights from Portland, Maine to San Diego

Our best Delta deals on Portland, Maine to San Diego flight tickets
Delta
Aug 12
PWM6:05 amPortland
8h 02m
1 stop
SAN11:07 amSan Diego
Aug 19
SAN10:49 amSan Diego
9h 31m
1 stop
PWM11:20 pmPortland
$419
Delta
Aug 12
PWM6:05 amPortland
8h 02m
1 stop
SAN11:07 amSan Diego
Aug 19
SAN10:49 amSan Diego
11h 10m
2 stops
PWM12:59 amPortland
$424
Delta
Aug 12
PWM6:05 amPortland
15h 01m
2 stops
SAN6:06 pmSan Diego
Aug 19
SAN6:15 amSan Diego
14h 05m
2 stops
PWM11:20 pmPortland
$429

American Airlines flights from Portland, Maine to San Diego

Our best American Airlines deals on Portland, Maine to San Diego flight tickets
American Airlines
Aug 4
PWM5:32 pmPortland
9h 27m
1 stop
SAN11:59 pmSan Diego
Aug 11
SAN9:41 amSan Diego
11h 10m
2 stops
PWM11:51 pmPortland
$441
American Airlines
Jun 24
PWM5:36 pmPortland
9h 23m
1 stop
SAN11:59 pmSan Diego
Jun 30
SAN6:15 amSan Diego
9h 10m
1 stop
PWM6:25 pmPortland
$512
American Airlines
Jun 12
PWM3:05 pmPortland
8h 48m
1 stop
SAN8:53 pmSan Diego
Jun 19
SAN9:25 pmSan Diego
9h 25m
1 stop
PWM9:50 amPortland
$528

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine 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, momondo users made 832,500 searches. Data last updated May 16, 2026.
Use the filters below to find and compare flights from Portland, Maine to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 8/12

6:05 am-11:07 am

1 stop8h 02m

San Diego

Wed 8/19

10:49 am-11:20 pm

1 stop9h 31m

$419

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 8/12

6:05 am-11:07 am

1 stop8h 02m

San Diego

Wed 8/19

10:49 am-12:59 am

2 stops11h 10m

$424

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 8/12

6:05 am-6:06 pm

2 stops15h 01m

San Diego

Wed 8/19

6:15 am-11:20 pm

2 stops14h 05m

$429
Quickest round-trip

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 8/5

6:00 am-11:38 am

1 stop8h 38m

San Diego

Tue 8/11

1:10 pm-12:59 am

1 stop8h 49m

$431

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 8/5

6:00 am-11:38 am

1 stop8h 38m

San Diego

Wed 8/12

6:15 am-11:20 pm

2 stops14h 05m

$436

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Tue 8/4

5:32 pm-11:59 pm

1 stop9h 27m

San Diego

Tue 8/11

9:41 am-11:51 pm

2 stops11h 10m

$441

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 8/5

6:00 am-11:38 am

1 stop8h 38m

San Diego

Mon 8/10

1:10 pm-12:59 am

1 stop8h 49m

$443

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 8/5

6:00 am-11:38 am

1 stop8h 38m

San Diego

Thu 8/13

7:58 pm-10:45 am

2 stops11h 47m

$448

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Tue 9/22

6:00 am-12:45 pm

1 stop9h 45m

San Diego

Fri 9/25

10:55 am-10:33 pm

1 stop8h 38m

$453

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Tue 9/22

6:30 am-12:02 pm

1 stop8h 32m

San Diego

Fri 9/25

11:50 am-11:01 am

2 stops20h 11m

$456

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Diego from

How to get the cheapest flight ticket from Portland, Maine to San Diego

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Portland, Maine and San Diego?

What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of September, then departing from Portland, Maine during the month January is also very affordable. Most momondo users find prices during this month for around $421.

How far in advance should I book a flight from Portland, Maine to San Diego?

You are more likely to see cheaper flights to San Diego from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $537 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Portland, Maine for as low as $303 on momondo.

How have Portland, Maine to San Diego flight prices changed over time?

As of May 2026, prices for Portland, Maine to San Diego flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from Portland, Maine to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland, Maine to San Diego (PWM to SAN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to San Diego

Fastest flight time

8h 02m

Direct flights

None
The fastest flight from Portland, Maine to San Diego takes 8h 02m
There are no direct flights from Portland, Maine to San Diego. There are no popular flight routes from Portland, Maine to San Diego.
Search flight deals

Frequently asked questions about flying from Portland, Maine to San Diego

  • How far is Portland to San Diego by plane?

    The distance between Portland and San Diego is about 2617.3 mi. In terms of flight time, this usually takes a little over 8h 02m.

  • When did momondo last update prices for flights from Portland Airport to San Diego Airport?

    Prices for flights from Portland Airport to San Diego Airport refresh daily.

  • How many operators does momondo search for flights from Portland Airport to San Diego Airport?

  • How old do you have to be to fly from Portland Airport to San Diego Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to San Diego Airport.

  • What documentation or ID do you need to fly to San Diego Airport?

    The travel and health documents you'll need for your trip to San Diego Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Diego Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Portland, Maine to San Diego?

Best airlines flying from Portland, Maine to San Diego

Compare and see reviews for airlines that fly from Portland, Maine to San Diego with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $311Free CancellationRating
7.9
8,455 reviews
Search Delta flights
American AirlinesPriceFrom $312Free CancellationRating
7.1
11,662 reviews
Search American Airlines flights
SouthwestPriceFrom $325Free CancellationRating
8.0
4,295 reviews
Search Southwest flights
United AirlinesPriceFrom $365Free CancellationRating
7.4
9,726 reviews
Search United Airlines flights

Traveling to a place near San Diego?

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

Why use momondo?

Why should I use momondo to find a flight deal from Portland to San Diego?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to San Diego. momondo saves you time and could save you money on your trip.

Can I find flights from Portland to San Diego with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San Diego from Portland with this policy.

How can momondo help me find flights from Portland to San Diego?

Once all potential Portland to San Diego flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Portland to San Diego right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Portland to San Diego flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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