HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$761+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Diego to Portsmouth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 December 12, 2025.

This KLM deal was found by Cheapflights users on 12/11. 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.
Sun 1/256:30 amSAN - SOU
2 stops18h 20mKLM
Sun 2/15:45 pmSOU - SAN
2 stops34h 37mKLM
Deal found 12/11$761
This Delta deal was found by Cheapflights users on 12/11. 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 1/227:05 amSAN - SOU
2 stops17h 20mDelta
Thu 1/299:00 amSOU - SAN
2 stops21h 31mDelta
Deal found 12/11$761
This Delta deal was found by Cheapflights users on 12/10. 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 6/21:40 pmSAN - SOU
1 stop34h 55mDelta
Wed 8/195:10 pmSOU - SAN
1 stop26h 40mDelta
Deal found 12/10$1,366
This Delta deal was found by Cheapflights users on 12/10. 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.
Wed 6/32:00 pmSAN - SOU
2 stops34h 35mDelta
Wed 8/195:10 pmSOU - SAN
1 stop26h 40mDelta
Deal found 12/10$1,371
This Delta deal was found by Cheapflights users on 12/10. 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 5/317:00 amSAN - SOU
2 stops17h 35mDelta
Wed 8/195:10 pmSOU - SAN
1 stop26h 40mDelta
Deal found 12/10$1,371
This Delta deal was found by Cheapflights users on 12/10. 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 6/21:40 pmSAN - SOU
1 stop19h 10mDelta
Fri 8/219:15 amSOU - SAN
2 stops18h 43mDelta
Deal found 12/10$1,376
This Delta deal was found by Cheapflights users on 12/10. 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 5/311:35 pmSAN - SOU
2 stops19h 15mDelta
Fri 8/219:15 amSOU - SAN
2 stops17h 39mDelta
Deal found 12/10$1,381
This Delta deal was found by Cheapflights users on 12/10. 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 6/610:10 pmSAN - SOU
2 stops26h 25mDelta
Fri 8/219:15 amSOU - SAN
2 stops17h 39mDelta
Deal found 12/10$1,381
This Delta deal was found by Cheapflights users on 12/10. 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 6/18:50 amSAN - SOU
2 stops15h 45mDelta
Fri 8/219:15 amSOU - SAN
2 stops17h 39mDelta
Deal found 12/10$1,381
This Delta deal was found by Cheapflights users on 12/10. 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 6/12:00 pmSAN - SOU
2 stops18h 50mDelta
Thu 8/209:15 amSOU - SAN
2 stops17h 39mDelta
Deal found 12/10$1,381
This Delta deal was found by Cheapflights users on 12/10. 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.
Wed 6/35:00 pmSAN - SOU
2 stops15h 50mDelta
Fri 8/219:15 amSOU - SAN
2 stops19h 06mDelta
Deal found 12/10$1,381

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$761
(KLM)

Popular in

June

Cheapest in

October

Average price

$1,007
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
Highest demand for flights based on searches. 26% potential increase in price ($310 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 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

Sun 1/25

6:30 am-8:50 am

2 stops18h 20m

Southampton Eastleigh

Sun 2/1

5:45 pm-8:22 pm

2 stops34h 37m

$761

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Thu 1/22

7:05 am-8:25 am

2 stops17h 20m

Southampton Eastleigh

Thu 1/29

9:00 am-10:31 pm

2 stops21h 31m

$761

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Tue 6/2

1:40 pm-8:35 am

1 stop34h 55m

Southampton Eastleigh

Wed 8/19

5:10 pm-11:50 am

1 stop26h 40m

$1,366

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Wed 6/3

2:00 pm-8:35 am

2 stops34h 35m

Southampton Eastleigh

Wed 8/19

5:10 pm-11:50 am

1 stop26h 40m

$1,371

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Sun 5/31

7:00 am-8:35 am

2 stops17h 35m

Southampton Eastleigh

Wed 8/19

5:10 pm-11:50 am

1 stop26h 40m

$1,371

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Tue 6/2

1:40 pm-4:50 pm

1 stop19h 10m

Southampton Eastleigh

Fri 8/21

9:15 am-7:58 pm

2 stops18h 43m

$1,376

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Sun 5/31

1:35 pm-4:50 pm

2 stops19h 15m

Southampton Eastleigh

Fri 8/21

9:15 am-6:54 pm

2 stops17h 39m

$1,381

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Sat 6/6

10:10 pm-8:35 am

2 stops26h 25m

Southampton Eastleigh

Fri 8/21

9:15 am-6:54 pm

2 stops17h 39m

$1,381

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Mon 6/1

8:50 am-8:35 am

2 stops15h 45m

Southampton Eastleigh

Fri 8/21

9:15 am-6:54 pm

2 stops17h 39m

$1,381

San DiegoSouthampton

SAN - SOU

SANSOU

San Diego

Mon 6/1

2:00 pm-4:50 pm

2 stops18h 50m

Southampton Eastleigh

Thu 8/20

9:15 am-6:54 pm

2 stops17h 39m

$1,381

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 18 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 $469). 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 December 12, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 16% 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.

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 December 12, 2025.

The most flights from SAN to P0R are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, 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 20m. 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 (77%), Alaska Airlines (77%) and British Airways (77%).

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

    The cheapest flight price from San Diego to Portsmouth is $287. On average you can expect to pay $2,326. The most popular route, (San Diego - Southampton Eastleigh), can usually be booked for $761.

  • 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 $469). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Diego to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to Gatwick flights
Los Angeles to London City flights
San Francisco to Gatwick flights
San Francisco to London City flights
San Diego to Heathrow flights
Los Angeles to Stansted flights
Ontario to Heathrow flights
San Francisco to Stansted flights
Las Vegas to Heathrow flights
Los Angeles to Luton flights
San Diego to Gatwick flights
San Francisco to Luton flights
Santa Ana to Heathrow flights
San Jose to Heathrow flights
Los Angeles to Edinburgh flights
Las Vegas to Gatwick flights
San Diego to London City flights
Sacramento to Heathrow flights
Las Vegas to London City flights
San Francisco to Edinburgh flights
Los Angeles to Manchester flights
Oakland to Heathrow flights
San Diego to Stansted flights
San Francisco to Manchester flights
San Francisco to Southampton flights
Sacramento to Gatwick flights
Reno to Heathrow flights
Sacramento to London City flights
Palm Springs to Heathrow flights
Las Vegas to Edinburgh flights
Oakland to Gatwick flights
Burbank to Heathrow flights
Las Vegas to Stansted flights
San Jose to Gatwick flights
Santa Ana to Edinburgh flights
Ontario to Edinburgh flights
Los Angeles to Liverpool flights
San Jose to Edinburgh flights
Ontario to Manchester flights
Reno to London City flights
San Diego to Edinburgh flights
Fresno to Heathrow flights
Reno to Gatwick flights
Ontario to Gatwick flights
Santa Rosa to Heathrow flights
Santa Ana to Manchester flights
Palm Springs to London City flights
Los Angeles to Birmingham flights

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$210Average$906FlexibilityNo cancel feeOn-time62%
DeltaCheapest$552Average$822FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$556Average$827FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$567Average$803FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$577Average$838FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$578Average$706FlexibilityNo cancel feeOn-time77%
IberiaCheapest$578Average$855FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$595Average$856FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$620Average$824FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$678Average$1,009FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.