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$878+ Cheap flights from San Diego (SAN) to Portsmouth, England

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
sep. 8 — sep. 151
lun. 9/8
lun. 9/15
1 adult, Economy
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Cheap 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 septiembre 3, 2025.

Round-trip from

$878
(Delta)

Popular in

June

Cheapest in

February

Average price

$734
From San Diego to Portsmouth
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($312 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 September 2025
Search Deals

Find flight deals from San Diego to Portsmouth

Best flights from San Diego to Portsmouth
Discover carefully curated flight deals from San Diego to Portsmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated septiembre 3, 2025.

This Delta deal was found by Cheapflights users on 9/2. 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.
jue. 2/262:00 pmSAN - SOU
1 stop19h 00mDelta
lun. 3/28:50 amSOU - SAN
1 stop35h 15mDelta
Deal found 9/2$878
This Virgin Atlantic deal was found by Cheapflights users on 9/2. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/266:20 amSAN - SOU
2 stops42h 30mVirgin Atlantic
lun. 3/25:30 pmSOU - SAN
2 stops36h 30mVirgin Atlantic
Deal found 9/2$893

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 septiembre 3, 2025.
Use the filters below to find and compare flights from San Diego to Portsmouth that are best for you.

Fly from

San Diego

Fly to

Portsmouth

Route

Depart

Return

Price

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

jue. 2/26

2:00 pm-5:00 pm

1 stop19h 00m

Southampton Eastleigh

lun. 3/2

8:50 am-12:05 pm

1 stop35h 15m

$878

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

jue. 2/26

6:20 am-8:50 am

2 stops42h 30m

Southampton Eastleigh

lun. 3/2

5:30 pm-10:00 pm

2 stops36h 30m

$893

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/2

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 month to book a flight from San Diego to Portsmouth?

Currently, November is the cheapest month in which you can book a flight from San Diego to Portsmouth (average of $661). Flying from San Diego to Portsmouth in June is currently the most expensive (average of $1,097). 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.

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 septiembre 3, 2025.

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.

What is the cheapest day to fly from San Diego to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Portsmouth. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Diego to Portsmouth flight should consider departing on Friday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 septiembre 3, 2025.

The most flights from SAN to P0R are scheduled on a Monday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 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 19h. 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 American Airlines (76%), Alaska Airlines (76%) and British Airways (76%).

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

    The cheapest flight price from San Diego to Portsmouth is $429. On average you can expect to pay $2,566. The most popular route, (San Diego - Southampton Eastleigh), can usually be booked for $878.

  • 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.

  • What is the cheapest month to book a flight from San Diego to Portsmouth?

    Currently, November is the cheapest month in which you can book a flight from San Diego to Portsmouth (average of $661). Flying from San Diego to Portsmouth in June is currently the most expensive (average of $1,097). 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.

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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 septiembre 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$210Average$904FlexibilityNo cancel feeOn-time62%
DeltaCheapest$553Average$1,195FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$569Average$830FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$879FlexibilityNo cancel feeOn-time75%
IberiaCheapest$589Average$838FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$590Average$783FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$591Average$873FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$603Average$849FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$620Average$898FlexibilityNo cancel feeOn-time72%
FinnairCheapest$642Average$738FlexibilityNo cancel feeOn-time76%

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