$844+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Apr 26 — May 31
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
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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
One-way
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 March 27, 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 March 27, 2026.
This KLM deal was found by Cheapflights users on 3/23. 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.
Mon 9/287:00 am
SAN
- SOU
2 stops17h 35m
KLM
Tue 10/139:05 am
SOU
- SAN
2 stops17h 50m
KLM
Deal found 3/23![KLM logo]()
$997
This Delta deal was found by Cheapflights users on 3/25. 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 3/2511:54 am
SAN
- SOU
2 stops22h 31m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 3/25![Delta logo]()
$1,127
This Delta deal was found by Cheapflights users on 3/25. 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 3/2511:54 am
SAN
- SOU
2 stops22h 31m
Delta
Tue 3/315:20 pm
SOU
- SAN
2 stops32h 31m
Delta
Deal found 3/25![Delta logo]()
$1,136
This Delta deal was found by Cheapflights users on 3/25. 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 3/2511:54 am
SAN
- SOU
2 stops22h 31m
Delta
Wed 4/15:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 3/25![Delta logo]()
$1,143
This Delta deal was found by Cheapflights users on 3/25. 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 3/2511:54 am
SAN
- SOU
2 stops22h 31m
Delta
Thu 4/29:05 am
SOU
- SAN
2 stops19h 31m
Delta
Deal found 3/25![Delta logo]()
$1,152
This Justfly.com deal was found by Cheapflights users on 3/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/810:45 pm
SAN
- SOU
2 stops25h 55m
Aer Lingus
Fri 8/219:20 am
SOU
- SAN
2 stops41h 56m
Aer Lingus
Deal found 3/25![Aer Lingus logo]()
$1,172
This Delta deal was found by Cheapflights users on 3/25. 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 3/2511:54 am
SAN
- SOU
2 stops22h 31m
Delta
Sun 3/299:15 am
SOU
- SAN
2 stops19h 30m
Delta
Deal found 3/25![Delta logo]()
$1,187
This Delta deal was found by Cheapflights users on 3/25. 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 3/2511:54 am
SAN
- SOU
2 stops22h 31m
Delta
Fri 4/35:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 3/25![Delta logo]()
$1,193
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 March 27, 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 March 27, 2026.
This KLM deal was found by Cheapflights users on 3/24. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:40 pm
SAN
- SOU
1 stop34h 55m
KLM
Sat 5/165:20 pm
SOU
- SAN
2 stops30h 36m
KLM
Deal found 3/24![KLM logo]()
$1,203
This Mytrip deal was found by Cheapflights users on 3/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:00 am
SAN
- SOU
3 stops25h 50m
Multiple Airlines
Fri 8/215:20 pm
SOU
- SAN
3 stops35h 19m
Multiple Airlines
Deal found 3/25![Multiple Airlines logo]()
$1,887
This KLM deal was found by Cheapflights users on 3/23. 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.
Sat 6/61:37 pm
SAN
- SOU
2 stops19h 13m
KLM
Sat 6/139:15 am
SOU
- SAN
2 stops22h 24m
KLM
Deal found 3/23![KLM logo]()
$1,314
This KLM deal was found by Cheapflights users on 3/25. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/81:40 pm
SAN
- SOU
1 stop35h 05m
KLM
Fri 8/219:15 am
SOU
- SAN
1 stop34h 35m
KLM
Deal found 3/25![KLM logo]()
$1,330
This British Airways deal was found by Cheapflights users on 3/22. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/314:45 pm
SAN
- SOU
2 stops20h 00m
British Airways
Wed 6/177:55 pm
SOU
- SAN
2 stops29h 55m
British Airways
Deal found 3/22![British Airways logo]()
$5,842
This British Airways deal was found by Cheapflights users on 3/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:40 pm
SAN
- SOU
2 stops29h 45m
British Airways
Mon 4/207:55 pm
SOU
- SAN
2 stops29h 55m
British Airways
Deal found 3/25![British Airways logo]()
$5,855
Last-minute flights from San Diego to PortsmouthDiscover last-minute flight deals from San Diego to Portsmouth. Data last updated March 27, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Portsmouth. Data last updated March 27, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 3/267:00 am
SAN
- SOU
2 stops18h 20m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 3/25![Delta logo]()
$1,431
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 3/267:00 am
SAN
- SOU
2 stops18h 20m
Delta
Tue 3/315:20 pm
SOU
- SAN
2 stops30h 35m
Delta
Deal found 3/25![Delta logo]()
$1,440
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 3/267:00 am
SAN
- SOU
2 stops18h 20m
Delta
Wed 4/15:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 3/25![Delta logo]()
$1,447
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 3/267:00 am
SAN
- SOU
2 stops18h 20m
Delta
Thu 4/29:05 am
SOU
- SAN
2 stops19h 31m
Delta
Deal found 3/25![Delta logo]()
$1,456
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 3/267:00 am
SAN
- SOU
2 stops18h 20m
Delta
Sun 3/299:15 am
SOU
- SAN
2 stops19h 30m
Delta
Deal found 3/25![Delta logo]()
$1,491
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 3/267:00 am
SAN
- SOU
2 stops18h 20m
Delta
Fri 4/35:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 3/25![Delta logo]()
$1,497
This Delta deal was found by Cheapflights users on 3/25. 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.
Sun 3/296:15 am
SAN
- SOU
2 stops18h 20m
Delta
Mon 4/69:05 am
SOU
- SAN
1 stop34h 45m
Delta
Deal found 3/25![Delta logo]()
$1,143
This Delta deal was found by Cheapflights users on 3/25. 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.
Sun 3/296:15 am
SAN
- SOU
2 stops18h 20m
Delta
Sun 4/59:15 am
SOU
- SAN
2 stops22h 25m
Delta
Deal found 3/25![Delta logo]()
$1,202
This Delta deal was found by Cheapflights users on 3/25. 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.
Sun 3/296:15 am
SAN
- SOU
2 stops18h 20m
Delta
Tue 4/79:05 am
SOU
- SAN
2 stops19h 31m
Delta
Deal found 3/25![Delta logo]()
$1,341
This Delta deal was found by Cheapflights users on 3/25. 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.
Mon 3/3010:30 pm
SAN
- SOU
2 stops26h 05m
Delta
Mon 4/69:05 am
SOU
- SAN
1 stop34h 45m
Delta
Deal found 3/25![Delta logo]()
$1,331
This Delta deal was found by Cheapflights users on 3/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:25 pm
SAN
- SOU
2 stops26h 10m
Delta
Fri 4/39:05 am
SOU
- SAN
2 stops22h 09m
Delta
Deal found 3/23![Delta logo]()
$1,479
One-way flights from San Diego to PortsmouthSearch for one-way flight options from San Diego to Portsmouth. Find affordable one-way fares based on user searches. Data last updated March 27, 2026.
Search for one-way flight options from San Diego to Portsmouth. Find affordable one-way fares based on user searches. Data last updated March 27, 2026.
This Delta deal was found by Cheapflights users on 3/26. 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 6/107:20 am
SAN
- SOU
2 stops25h 30m
Delta
Deal found 3/26![Delta logo]()
$844
This Delta deal was found by Cheapflights users on 3/26. 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 6/111:40 pm
SAN
- SOU
1 stop35h 05m
Delta
Deal found 3/26![Delta logo]()
$910
This Delta deal was found by Cheapflights users on 3/26. 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 6/131:40 pm
SAN
- SOU
1 stop19h 10m
Delta
Deal found 3/26![Delta logo]()
$971
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 March 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,172 (Justfly.com) |
One-way from | $844 (Delta) |
Popular in | June |
Cheapest in | October |
Average price | $760 |
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 March 27, 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 - SOU
SANSOU
San Diego
Sat 5/9
1:40 pm-8:35 am
1 stop34h 55m
Southampton Eastleigh
Sat 5/16
5:20 pm-3:56 pm
2 stops30h 36m
$1,203
Quickest round-trip
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sat 6/6
1:37 pm-4:50 pm
2 stops19h 13m
Southampton Eastleigh
Sat 6/13
9:15 am-11:39 pm
2 stops22h 24m
$1,314
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sat 8/8
1:40 pm-8:45 am
1 stop35h 05m
Southampton Eastleigh
Fri 8/21
9:15 am-11:50 am
1 stop34h 35m
$1,330
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sat 8/8
7:00 am-4:50 pm
3 stops25h 50m
Southampton Eastleigh
Fri 8/21
5:20 pm-8:39 pm
3 stops35h 19m
$1,887
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sun 5/31
4:45 pm-8:45 pm
2 stops20h 00m
Southampton Eastleigh
Wed 6/17
7:55 pm-5:50 pm
2 stops29h 55m
$5,842
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Wed 4/15
7:40 pm-9:25 am
2 stops29h 45m
Southampton Eastleigh
Mon 4/20
7:55 pm-5:50 pm
2 stops29h 55m
$5,855
Cheapest one-way
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sun 6/14
7:20 am-4:50 pm
2 stops25h 30m
$844
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Wed 6/10
7:20 am-4:50 pm
2 stops25h 30m
$844
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Thu 6/11
1:40 pm-8:45 am
1 stop35h 05m
$910
Quickest one-way
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sat 6/13
1:40 pm-4:50 pm
1 stop19h 10m
$971
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 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 $936). 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 March 27, 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.
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.
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.
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Complete your trip
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Popular flights
Top destinations
Alternative routes for San Diego to Portsmouth
See prices for flight routes from nearby airports that may be better suited for you.
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 March 27, 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 March 27, 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 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 March 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$181 | Average$1,178 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$552 | Average$952 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$560 | Average$884 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$567 | Average$938 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$574 | Average$815 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$578 | Average$706 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$603 | Average$961 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$620 | Average$670 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$621 | Average$884 | FlexibilityNo cancel fee | On-time76% |