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Cheap flights from Portland, Maine to San Diego from $149

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 11/24. 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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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
6:17 am - 12:17 pmPWM-SAN
9h 00m1 stop
Delta Logo
6:30 am - 10:29 pmSAN-PWM
12h 59m2 stops
$343Delta
Find Deal
Wed, Jan 14 - Sun, Jan 18
Delta Logo
12:43 pm - 10:33 pmPWM-SAN
12h 50m2 stops
Delta Logo
6:30 am - 10:29 pmSAN-PWM
12h 59m2 stops
$348Delta
Find Deal
Wed, Jan 14 - Sun, Jan 18
Southwest Logo
3:30 pm - 9:35 pmPWM-SAN
9h 05m1 stop
Southwest Logo
12:00 pm - 10:15 pmSAN-PWM
7h 15m1 stop
$368Southwest
Find Deal
Wed, Nov 19 - Wed, Dec 3
Southwest Logo
3:30 pm - 9:35 pmPWM-SAN
9h 05m1 stop
Southwest Logo
10:20 am - 10:15 pmSAN-PWM
8h 55m2 stops
$373Southwest
Find Deal
Wed, Nov 19 - Wed, Dec 3
United Airlines Logo
3:12 pm - 9:28 pmPWM-SAN
9h 16m1 stop
United Airlines Logo
8:10 am - 6:54 pmSAN-PWM
7h 44m1 stop
$399United Airlines
Find Deal
Mon, Jan 19 - Sat, Jan 31
American Airlines Logo
3:56 pm - 10:58 pmPWM-SAN
10h 02m1 stop
American Airlines Logo
11:30 am - 10:54 pmSAN-PWM
8h 24m1 stop
$439American Airlines
Find Deal
Wed, Jan 14 - Sun, Jan 18
United Airlines Logo
4:40 pm - 10:20 pmPWM-SAN
8h 40m1 stop
United Airlines Logo
8:45 am - 11:09 pmSAN-PWM
11h 24m2 stops
$444United Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
Alaska Airlines Logo
12:46 pm - 10:07 amPWM-SAN
24h 21m3 stops
Alaska Airlines Logo
11:49 am - 10:54 pmSAN-PWM
32h 05m2 stops
$474Alaska Airlines
Find Deal
Tue, Feb 3 - Wed, Feb 4
Alaska Airlines Logo
3:56 pm - 9:47 amPWM-SAN
20h 51m3 stops
Alaska Airlines Logo
1:57 pm - 10:54 pmSAN-PWM
29h 57m3 stops
$480Alaska Airlines
Find Deal
Tue, Feb 3 - Wed, Feb 4
American Airlines Logo
5:34 am - 3:48 pmPWM-SAN
13h 14m2 stops
American Airlines Logo
6:20 am - 6:16 pmSAN-PWM
8h 56m1 stop
$536American Airlines
Find Deal
Fri, Dec 12 - Fri, Dec 19

Delta flights from Portland, Maine to San Diego

Our best Delta deals on Portland, Maine to San Diego flight tickets
Delta
Jan 14
PWM6:17 amPortland
9h 00m
1 stop
SAN12:17 pmSan Diego
Jan 18
SAN6:30 amSan Diego
12h 59m
2 stops
PWM10:29 pmPortland
$343
Find similar
Delta
Jan 14
PWM12:43 pmPortland
12h 50m
2 stops
SAN10:33 pmSan Diego
Jan 18
SAN6:30 amSan Diego
12h 59m
2 stops
PWM10:29 pmPortland
$348
Find similar
Delta
Feb 3
PWM12:20 pmPortland
9h 43m
1 stop
SAN7:03 pmSan Diego
Feb 4
SAN11:08 amSan Diego
8h 21m
1 stop
PWM10:29 pmPortland
$359
Find similar

Southwest flights from Portland, Maine to San Diego

Our best Southwest deals on Portland, Maine to San Diego flight tickets
Southwest
Nov 19
PWM3:30 pmPortland
9h 05m
1 stop
SAN9:35 pmSan Diego
Dec 3
SAN12:00 pmSan Diego
7h 15m
1 stop
PWM10:15 pmPortland
$368
Find similar
Southwest
Nov 19
PWM3:30 pmPortland
9h 05m
1 stop
SAN9:35 pmSan Diego
Dec 3
SAN10:20 amSan Diego
8h 55m
2 stops
PWM10:15 pmPortland
$373
Find similar
Southwest
Nov 19
PWM12:45 pmPortland
12h 40m
2 stops
SAN10:25 pmSan Diego
Dec 3
SAN9:30 amSan Diego
9h 45m
2 stops
PWM10:15 pmPortland
$378
Find similar

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 October 29, 2025.
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

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 1/14

6:17 am-12:17 pm

1 stop9h 00m

San Diego

Sun 1/18

6:30 am-10:29 pm

2 stops12h 59m

$343

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 1/14

12:43 pm-10:33 pm

2 stops12h 50m

San Diego

Sun 1/18

6:30 am-10:29 pm

2 stops12h 59m

$348

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 11/19

3:30 pm-9:35 pm

1 stop9h 05m

San Diego

Wed 12/3

12:00 pm-10:15 pm

1 stop7h 15m

$368

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 11/19

3:30 pm-9:35 pm

1 stop9h 05m

San Diego

Wed 12/3

10:20 am-10:15 pm

2 stops8h 55m

$373

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Mon 1/19

3:12 pm-9:28 pm

1 stop9h 16m

San Diego

Sat 1/31

8:10 am-6:54 pm

1 stop7h 44m

$399

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 1/14

3:56 pm-10:58 pm

1 stop10h 02m

San Diego

Sun 1/18

11:30 am-10:54 pm

1 stop8h 24m

$439

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Wed 11/26

4:40 pm-10:20 pm

1 stop8h 40m

San Diego

Wed 12/3

8:45 am-11:09 pm

2 stops11h 24m

$444

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Tue 2/3

12:46 pm-10:07 am

3 stops24h 21m

San Diego

Wed 2/4

11:49 am-10:54 pm

2 stops32h 05m

$474

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Tue 2/3

3:56 pm-9:47 am

3 stops20h 51m

San Diego

Wed 2/4

1:57 pm-10:54 pm

3 stops29h 57m

$480

PortlandSan Diego

PWM - SAN

PWMSAN

Portland

Fri 12/12

5:34 am-3:48 pm

2 stops13h 14m

San Diego

Fri 12/19

6:20 am-6:16 pm

1 stop8h 56m

$536

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 cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of January, then departing from Portland, Maine during the month September is also very affordable. Most momondo users find prices during this month for around $396.

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from Portland, Maine to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $472. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $809. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

What is the cheapest time of day to depart on your flight to San Diego?

The cheapest time of day to fly to San Diego is in the afternoon when flights can be purchased for as low as $476. Flights in the morning are often more expensive with an average ticket price of $543.

How far in advance should I book a flight 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 $498 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 $369 on momondo.

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

As of October 2025, prices for Portland, Maine to San Diego flights are approximately 0% more expensive 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

Direct flights

None
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

  • 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 10m.

  • 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
American AirlinesPriceFrom $312Free CancellationRating
7.2
11,032 reviews
Search American Airlines flights
DeltaPriceFrom $316Free CancellationRating
7.9
7,992 reviews
Search Delta flights
SouthwestPriceFrom $325Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
United AirlinesPriceFrom $365Free CancellationRating
7.4
8,999 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
La Mesa
Imperial Beach
Poway
Borrego Springs
San Ysidro
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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