$1,098+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Sep 24 — Oct 11
Round-trip
1 adult, Economy
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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
Cheapest
Best
Last-minute
Cheapest flights from San Diego to PortsmouthExplore 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 August 25, 2026.
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 August 25, 2026.
This KLM deal was found by Cheapflights users on 8/23. 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.
Wed 10/76:25 am -
2 stops18h 10m
Wed 10/145:20 pm -
1 stop26h 30m
Deal found 8/23![KLM logo]()
$1,098
This KLM deal was found by Cheapflights users on 8/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:20 am -
2 stops18h 15m
Tue 10/139:05 am -
2 stops21h 46m
Deal found 8/21![KLM logo]()
$1,107
This Delta deal was found by Cheapflights users on 8/21. 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.
Wed 12/234:30 pm -
2 stops31h 40m
Tue 12/295:30 pm -
2 stops36h 22m
Deal found 8/21![Delta logo]()
$1,150
This Delta deal was found by Cheapflights users on 8/24. 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 10/61:40 pm -
1 stop19h 10m
Sun 10/115:20 pm -
2 stops32h 42m
Deal found 8/24![Delta logo]()
$1,154
This Delta deal was found by Cheapflights users on 8/24. 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 10/46:25 am -
2 stops18h 10m
Sun 10/115:20 pm -
2 stops32h 42m
Deal found 8/24![Delta logo]()
$1,158
This Delta deal was found by Cheapflights users on 8/21. 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.
Tue 12/2210:30 pm -
2 stops25h 40m
Tue 12/295:30 pm -
2 stops32h 57m
Deal found 8/21![Delta logo]()
$1,175
This Delta deal was found by Cheapflights users on 8/21. 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.
Wed 12/234:30 pm -
2 stops31h 40m
Mon 1/48:40 am -
1 stop35h 30m
Deal found 8/21![Delta logo]()
$1,239
This Delta deal was found by Cheapflights users on 8/21. 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.
Wed 12/234:30 pm -
2 stops31h 40m
Wed 12/305:30 pm -
2 stops35h 18m
Deal found 8/21![Delta logo]()
$1,243
This Delta deal was found by Cheapflights users on 8/21. 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.
Tue 12/229:40 pm -
2 stops26h 30m
Mon 1/48:40 am -
1 stop35h 30m
Deal found 8/21![Delta logo]()
$1,259
This Delta deal was found by Cheapflights users on 8/21. 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.
Tue 12/229:40 pm -
2 stops35h 20m
Wed 12/305:30 pm -
2 stops35h 18m
Deal found 8/21![Delta logo]()
$1,268
Best flights from San Diego to PortsmouthDiscover 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 August 25, 2026.
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 August 25, 2026.
This KLM deal was found by Cheapflights users on 8/23. 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.
Wed 10/76:25 am -
2 stops18h 10m
Wed 10/145:20 pm -
1 stop26h 30m
Deal found 8/23![KLM logo]()
$1,098
This Delta deal was found by Cheapflights users on 8/25. 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 10/710:57 am -
2 stops21h 53m
Wed 10/149:15 am -
2 stops21h 36m
Deal found 8/25![Delta logo]()
$1,108
This KLM deal was found by Cheapflights users on 8/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:20 am -
2 stops18h 15m
Tue 10/139:05 am -
2 stops21h 46m
Deal found 8/21![KLM logo]()
$1,107
This Delta deal was found by Cheapflights users on 8/24. 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 10/46:25 am -
2 stops18h 10m
Sun 10/115:20 pm -
2 stops32h 42m
Deal found 8/24![Delta logo]()
$1,158
This Delta deal was found by Cheapflights users on 8/24. 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 10/66:15 am -
2 stops18h 30m
Sun 10/115:20 pm -
2 stops32h 42m
Deal found 8/24![Delta logo]()
$1,158
This Delta deal was found by Cheapflights users on 8/21. 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.
Wed 12/234:30 pm -
2 stops31h 40m
Mon 1/48:40 am -
2 stops39h 26m
Deal found 8/21![Delta logo]()
$1,243
Last-minute flights from San Diego to PortsmouthDiscover last-minute flight deals from San Diego to Portsmouth. Data last updated August 25, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Portsmouth. Data last updated August 25, 2026 and is based on user searches.
This KLM deal was found by Cheapflights users on 8/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:20 am -
2 stops18h 15m
Tue 10/139:05 am -
2 stops21h 46m
Deal found 8/21![KLM logo]()
$1,107
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 August 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,098 (KLM) |
Popular in | June |
Cheapest in | February |
Average price | $1,006 |
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 7,457,451 searches. Data last updated August 25, 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
Cheapest round-trip
San DiegoSouthampton
SAN San Diego - SOU Southampton Eastleigh
SANSOU
San Diego
Wed 10/7
6:25 am-8:35 am
2 stops18h 10m
Southampton Eastleigh
Wed 10/14
5:20 pm-11:50 am
1 stop26h 30m
$1,098
Quickest round-trip
San DiegoSouthampton
SAN San Diego - SOU Southampton Eastleigh
SANSOU
San Diego
Mon 9/28
6:20 am-8:35 am
2 stops18h 15m
Southampton Eastleigh
Tue 10/13
9:05 am-10:51 pm
2 stops21h 46m
$1,107
San DiegoSouthampton
SAN San Diego - SOU Southampton Eastleigh
SANSOU
San Diego
Wed 10/7
10:57 am-4:50 pm
2 stops21h 53m
Southampton Eastleigh
Wed 10/14
9:15 am-10:51 pm
2 stops21h 36m
$1,108
San DiegoSouthampton
SAN San Diego - SOU Southampton Eastleigh
SANSOU
San Diego
Sun 10/4
6:25 am-8:35 am
2 stops18h 10m
Southampton Eastleigh
Sun 10/11
5:20 pm-6:02 pm
2 stops32h 42m
$1,158
San DiegoSouthampton
SAN San Diego - SOU Southampton Eastleigh
SANSOU
San Diego
Tue 10/6
6:15 am-8:45 am
2 stops18h 30m
Southampton Eastleigh
Sun 10/11
5:20 pm-6:02 pm
2 stops32h 42m
$1,158
San DiegoSouthampton
SAN San Diego - SOU Southampton Eastleigh
SANSOU
San Diego
Wed 12/23
4:30 pm-8:10 am
2 stops31h 40m
Southampton Eastleigh
Mon 1/4
8:40 am-4:06 pm
2 stops39h 26m
$1,243
Sorted by cheapest first
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.
SAN-SOU
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
SAN-P0R
SAN-SOU
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 August 25, 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 August 25, 2026.
The most flights from SAN to P0R are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 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.
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Alternative routes for San Diego to Portsmouth
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Complete your trip
Complete your trip to Portsmouth by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Diego to Portsmouth by cabin class
Find flights from San Diego to Portsmouth, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Diego and Portsmouth flights
Browse other San Diego and Portsmouth flight options. Last updated on August 25, 2026.
Other flights from San Diego
Browse through other flights departing from San Diego. Flights are based on user searches made on Cheapflights and were last updated on August 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Diego to Portsmouth flights
Consider these flights traveling from San Diego to Portsmouth.
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 7,457,451 searches. Data last updated August 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$296 | Average$670 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$552 | Average$942 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$578 | Average$706 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$586 | Average$1,052 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$608 | Average$890 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$621 | Average$897 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$623 | Average$1,030 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$685 | Average$1,013 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$792 | Average$1,190 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$888 | Average$979 | FlexibilityNo cancel fee | On-time75% |