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Portsmouth

$422+ Cheap flights from San Diego (SAN) to Portsmouth, England

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Jul 31 — Aug 71
Fri 7/31
Fri 8/7
1 adult, Economy
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Cheap flight deals from San Diego to Portsmouth

Cheapest flights from San Diego to Portsmouth
Explore the most affordable flight options available from San Diego to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2026.

This KLM deal was found by Cheapflights users on 6/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:20 am
SAN
-
SOU
2 stops18h 15m
KLM
Tue 10/139:05 am
SOU
-
SAN
2 stops22h 41m
KLM
Deal found 6/29$1,043
This Delta deal was found by Cheapflights users on 6/30. 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.
Mon 9/286:25 am
SAN
-
SOU
2 stops18h 10m
Delta
Tue 10/139:05 am
SOU
-
SAN
2 stops22h 41m
Delta
Deal found 6/30$1,044
This KLM deal was found by Cheapflights users on 6/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/142:00 pm
SAN
-
SOU
2 stops19h 00m
KLM
Fri 8/219:15 am
SOU
-
SAN
2 stops19h 43m
KLM
Deal found 6/30$1,154
This Delta deal was found by Cheapflights users on 7/1. 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.
Fri 10/26:25 am
SAN
-
SOU
2 stops18h 20m
Delta
Fri 10/169:05 am
SOU
-
SAN
2 stops22h 34m
Delta
Deal found 7/1$1,307
This KAYAK deal was found by Cheapflights users on 6/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:00 pm
SAN
-
SOU
3 stops19h 45m
Multiple Airlines
Tue 10/139:15 am
SOU
-
SAN
2 stops17h 47m
Multiple Airlines
Deal found 6/28$1,360
This KLM deal was found by Cheapflights users on 6/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/313:50 pm
SAN
-
SOU
2 stops17h 10m
KLM
Fri 8/79:15 am
SOU
-
SAN
2 stops19h 43m
KLM
Deal found 6/30$1,372
This KLM deal was found by Cheapflights users on 7/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:25 am
SAN
-
SOU
2 stops18h 20m
KLM
Fri 10/165:20 pm
SOU
-
SAN
1 stop26h 30m
KLM
Deal found 7/1$1,459
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:15 am
SAN
-
SOU
2 stops27h 15m
Multiple Airlines
Fri 8/218:00 pm
SOU
-
SAN
3 stops32h 39m
Multiple Airlines
Deal found 6/30$1,598

Find flight deals from San Diego to Portsmouth

Keep the following information in mind while searching for San Diego to Portsmouth flight deals. Data was last updated July 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,043
(KLM)

One-way from

$422
(Delta)

Popular in

June

Cheapest in

February

Average price

$1,146
Provider with most accurate pricing for San Diego-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-London (LON) flights.
Search Deals
From San Diego to Portsmouth
Search Deals
One-way flight from San Diego to Portsmouth
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($318 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Portsmouth 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 1, 2026.
Use the filters below to find and compare flights from San Diego to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Mon 9/28

6:20 am-8:35 am

2 stops18h 15m

Southampton Eastleigh

Tue 10/13

9:05 am-11:46 pm

2 stops22h 41m

$1,043

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Mon 9/28

3:20 pm-4:50 pm

2 stops17h 30m

Southampton Eastleigh

Tue 10/13

9:05 am-11:03 pm

2 stops21h 58m

$1,043

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 8/14

2:00 pm-5:00 pm

2 stops19h 00m

Southampton Eastleigh

Fri 8/21

9:15 am-8:58 pm

2 stops19h 43m

$1,154

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Mon 9/28

5:00 pm-8:45 pm

3 stops19h 45m

Southampton Eastleigh

Tue 10/13

9:15 am-7:02 pm

2 stops17h 47m

$1,360
Quickest round-trip

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 7/31

3:50 pm-5:00 pm

2 stops17h 10m

Southampton Eastleigh

Fri 8/7

9:15 am-8:58 pm

2 stops19h 43m

$1,372

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 10/2

6:25 am-8:45 am

2 stops18h 20m

Southampton Eastleigh

Fri 10/16

5:20 pm-11:50 am

1 stop26h 30m

$1,459

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 8/14

7:00 am-7:30 pm

3 stops28h 30m

Southampton Eastleigh

Fri 8/21

8:00 pm-8:39 pm

3 stops32h 39m

$1,700

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Sun 11/8

6:00 pm-8:55 pm

2 stops18h 55m

Southampton Eastleigh

Thu 11/12

12:35 pm-4:10 pm

2 stops35h 35m

$5,877

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Wed 10/7

4:45 pm-7:25 pm

2 stops18h 40m

Southampton Eastleigh

Mon 10/12

6:25 pm-2:55 pm

2 stops28h 30m

$5,891
Cheapest one-way

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Tue 11/10

2:05 pm-5:00 pm

1 stop18h 55m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 13 resultsSorted by cheapest first
1
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Best time to book a flight from San Diego to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from San Diego 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 San Diego to Portsmouth

What is the cheapest time of day to fly from SAN to P0R?

Find hourly flight availability from San Diego to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 1, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Diego to Portsmouth as you normally would.

Weekly flight availability from San Diego to Portsmouth

Explore weekly flight availability from San Diego to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 1, 2026.

The most flights from SAN to P0R are scheduled on a Monday (9 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 on average).

Related info for your journey

Find useful and relevant information for your journey from San Diego to Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Diego to Portsmouth?

    Located just 2.6 mi from the city center, San Diego is the airport most travelers will use when flying to Portsmouth from San Diego. Booking flights from San Diego (SAN) to Portsmouth should be relatively easy as there are 0 daily outbound flights to Portsmouth from 10 different airlines.

  • How long is the flight from San Diego to Portsmouth?

    Departing from San Diego to Portsmouth will take you 17h 30m. San Diego and Portsmouth are separated by a distance of 5462 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most reliable airlines from San Diego to Portsmouth?

    The top 3 most reliable airlines when flying from San Diego to Portsmouth are Aer Lingus (85%), Finnair (85%) and Iberia (85%).

  • What are the cheapest flights from San Diego to Portsmouth?

    The cheapest flight price from San Diego to Portsmouth is $333. On average you can expect to pay $3,480. The most popular route, (San Diego - Southampton Eastleigh), can usually be booked for $1,044.

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

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

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

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

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

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

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from San Diego to Portsmouth

Discover the top 10 airlines that operate flights from San Diego to Portsmouth. 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 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$181Average$1,190FlexibilityNo cancel feeOn-time62%
DeltaCheapest$552Average$969FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$567Average$941FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$571Average$925FlexibilityNo cancel feeOn-time70%
IberiaCheapest$577Average$792FlexibilityNo cancel feeOn-time77%
Scandinavian AirlinesCheapest$578Average$706FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$593Average$952FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$621Average$888FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$623Average$685FlexibilityNo cancel feeOn-time72%
Alaska AirlinesCheapest$888Average$979FlexibilityNo cancel feeOn-time75%

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