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Portsmouth

$489+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$804
(Delta)

One-way from

$489
(Delta)

Popular in

June

Cheapest in

February

Average price

$703
Provider with most accurate pricing for San Diego-London (LON) flight deals.
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Provider most trusted by Cheapflights users for San Diego-London (LON) flights.
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From San Diego to Portsmouth
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One-way flight from San Diego to Portsmouth
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Highest demand for flights based on searches. 27% potential increase in price ($318 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 22, 2025.

This Delta deal was found by Cheapflights users on 10/21. 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 12/59:59 amSAN - SOU
2 stops23h 01mDelta
Fri 12/128:40 amSOU - SAN
2 stops20h 25mDelta
Deal found 10/21$806
This Delta deal was found by Cheapflights users on 10/20. 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.
Sat 11/299:59 amSAN - SOU
2 stops23h 26mDelta
Sat 12/65:30 pmSOU - SAN
2 stops29h 53mDelta
Deal found 10/20$906
This Delta deal was found by Cheapflights users on 10/20. 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.
Tue 12/27:10 amSAN - SOU
2 stops17h 00mDelta
Fri 12/58:40 amSOU - SAN
2 stops20h 25mDelta
Deal found 10/20$916
This Delta deal was found by Cheapflights users on 10/20. 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.
Sun 11/3010:10 pmSAN - SOU
2 stops26h 00mDelta
Thu 12/118:50 amSOU - SAN
2 stops20h 15mDelta
Deal found 10/20$941
This Delta deal was found by Cheapflights users on 10/20. 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.
Tue 12/27:20 amSAN - SOU
2 stops16h 50mDelta
Sat 12/65:30 pmSOU - SAN
2 stops32h 51mDelta
Deal found 10/20$966
This Delta deal was found by Cheapflights users on 10/20. 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.
Thu 12/412:24 pmSAN - SOU
2 stops20h 36mDelta
Sat 12/65:30 pmSOU - SAN
2 stops32h 48mDelta
Deal found 10/20$1,016
This Mytrip deal was found by Cheapflights users on 10/21. 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 12/55:35 pmSAN - SOU
3 stops31h 10mMultiple Airlines
Fri 12/125:45 pmSOU - SAN
3 stops31h 39mMultiple Airlines
Deal found 10/21$1,553

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 October 22, 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

Thu 2/26

2:00 pm-5:00 pm

1 stop19h 00m

Southampton Eastleigh

Mon 3/2

5:30 pm-12:05 pm

1 stop26h 35m

$804

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Thu 12/4

10:30 pm-5:00 pm

2 stops34h 30m

Southampton Eastleigh

Mon 12/8

8:40 am-8:42 pm

2 stops20h 02m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Wed 12/3

10:30 pm-5:00 pm

2 stops34h 30m

Southampton Eastleigh

Thu 12/11

8:50 am-8:42 pm

2 stops19h 52m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 12/5

9:59 am-5:00 pm

2 stops23h 01m

Southampton Eastleigh

Fri 12/12

8:40 am-9:05 pm

2 stops20h 25m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 12/5

11:05 am-5:00 pm

2 stops21h 55m

Southampton Eastleigh

Sun 12/7

6:05 pm-3:23 pm

2 stops29h 18m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Thu 12/4

7:10 am-5:00 pm

2 stops25h 50m

Southampton Eastleigh

Sun 12/7

9:30 am-9:18 pm

2 stops19h 48m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Wed 12/3

10:30 pm-5:00 pm

2 stops34h 30m

Southampton Eastleigh

Mon 12/8

8:40 am-9:18 pm

2 stops20h 38m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Tue 12/2

7:20 am-8:10 am

2 stops16h 50m

Southampton Eastleigh

Wed 12/10

5:30 pm-3:23 pm

2 stops29h 53m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 12/5

11:05 am-5:00 pm

2 stops21h 55m

Southampton Eastleigh

Wed 12/10

8:40 am-8:42 pm

2 stops20h 02m

$806

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Fri 12/5

7:10 am-5:00 pm

2 stops25h 50m

Southampton Eastleigh

Thu 12/11

6:05 pm-3:23 pm

2 stops29h 18m

$806

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 20 results
1
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, December is the cheapest month in which you can book a flight from San Diego to Portsmouth (average of $484). Flying from San Diego to Portsmouth in June is currently the most expensive (average of $830). 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 October 22, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 15% on flights from San Diego to Portsmouth by exploring options for tickets in the afternoon.

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 Monday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 9 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.

  • 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 (79%), Alaska Airlines (79%) and British Airways (79%).

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

    The cheapest flight price from San Diego to Portsmouth is $433. On average you can expect to pay $2,702. The most popular route, (San Diego - Southampton Eastleigh), can usually be booked for $804.

  • 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, December is the cheapest month in which you can book a flight from San Diego to Portsmouth (average of $484). Flying from San Diego to Portsmouth in June is currently the most expensive (average of $830). 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

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Top 9 airlines flying from San Diego to Portsmouth

Discover the top 9 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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$210Average$916FlexibilityNo cancel feeOn-time62%
DeltaCheapest$552Average$962FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$556Average$742FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$567Average$893FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$576Average$853FlexibilityNo cancel feeOn-time70%
IberiaCheapest$582Average$852FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$593Average$867FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$620Average$898FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$678Average$824FlexibilityNo cancel feeOn-time76%

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