$357+ 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — LHR
Mar 7 — Mar 141
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
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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 February 5, 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 February 5, 2026.
This Delta deal was found by Cheapflights users on 2/4. 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 3/2310:10 pm
SAN
- SOU
2 stops27h 10m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$791
This Delta deal was found by Cheapflights users on 2/4. 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 3/2210:03 pm
SAN
- SOU
2 stops51h 17m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$804
This Delta deal was found by Cheapflights users on 2/2. 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.
Mon 12/79:45 am
SAN
- SOU
2 stops38h 25m
Delta
Mon 12/215:30 pm
SOU
- SAN
2 stops34h 55m
Delta
Deal found 2/2![Delta logo]()
$827
This Delta deal was found by Cheapflights users on 2/4. 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 3/2110:03 pm
SAN
- SOU
2 stops36h 02m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$907
This KLM deal was found by Cheapflights users on 2/3. 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.
Fri 8/72:00 pm
SAN
- SOU
2 stops19h 00m
KLM
Tue 8/186:05 pm
SOU
- SAN
2 stops29h 14m
KLM
Deal found 2/3![KLM logo]()
$1,005
This Delta deal was found by Cheapflights users on 2/2. 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.
Wed 12/910:55 am
SAN
- SOU
2 stops22h 05m
Delta
Tue 12/228:40 am
SOU
- SAN
2 stops21h 12m
Delta
Deal found 2/2![Delta logo]()
$1,022
This Delta deal was found by Cheapflights users on 2/2. 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.
Wed 12/912:50 pm
SAN
- SOU
2 stops20h 10m
Delta
Mon 12/218:40 am
SOU
- SAN
2 stops19h 45m
Delta
Deal found 2/2![Delta logo]()
$1,072
This Delta deal was found by Cheapflights users on 2/4. 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 3/2310:10 pm
SAN
- SOU
2 stops27h 10m
Delta
Sun 3/295:20 pm
SOU
- SAN
2 stops29h 34m
Delta
Deal found 2/4![Delta logo]()
$1,085
This Delta deal was found by Cheapflights users on 2/4. 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 3/2210:25 pm
SAN
- SOU
2 stops50h 55m
Delta
Sun 3/295:20 pm
SOU
- SAN
2 stops29h 34m
Delta
Deal found 2/4![Delta logo]()
$1,092
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 February 5, 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 February 5, 2026.
This Delta deal was found by Cheapflights users on 2/4. 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 3/2310:10 pm
SAN
- SOU
2 stops27h 10m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$791
This oojo deal was found by Cheapflights users on 2/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/225:38 pm
SAN
- SOU
2 stops35h 17m
Multiple Airlines
Sun 3/295:05 pm
SOU
- SAN
2 stops49h 03m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$1,117
This Delta deal was found by Cheapflights users on 2/4. 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 3/2410:25 pm
SAN
- SOU
2 stops36h 00m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$791
This Delta deal was found by Cheapflights users on 2/4. 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 3/2210:03 pm
SAN
- SOU
2 stops51h 17m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$804
This Delta deal was found by Cheapflights users on 2/4. 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 3/2110:03 pm
SAN
- SOU
2 stops36h 02m
Delta
Mon 3/305:20 pm
SOU
- SAN
2 stops32h 31m
Delta
Deal found 2/4![Delta logo]()
$935
This Delta deal was found by Cheapflights users on 2/4. 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 3/2310:10 pm
SAN
- SOU
2 stops27h 10m
Delta
Sun 3/295:20 pm
SOU
- SAN
2 stops29h 34m
Delta
Deal found 2/4![Delta logo]()
$1,085
This Delta deal was found by Cheapflights users on 2/4. 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 3/2110:03 pm
SAN
- SOU
2 stops36h 02m
Delta
Sun 3/295:20 pm
SOU
- SAN
2 stops29h 34m
Delta
Deal found 2/4![Delta logo]()
$1,196
This Delta deal was found by Cheapflights users on 2/3. 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 3/207:00 am
SAN
- SOU
2 stops18h 50m
Delta
Sun 3/299:15 am
SOU
- SAN
2 stops19h 33m
Delta
Deal found 2/3![Delta logo]()
$1,765
This Delta deal was found by Cheapflights users on 2/3. 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 3/207:00 am
SAN
- SOU
2 stops18h 50m
Delta
Mon 3/309:05 am
SOU
- SAN
2 stops17h 17m
Delta
Deal found 2/3![Delta logo]()
$1,765
Last-minute flights from San Diego to PortsmouthDiscover last-minute flight deals from San Diego to Portsmouth. Data last updated February 5, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Portsmouth. Data last updated February 5, 2026 and is based on user searches.
This British Airways deal was found by Cheapflights users on 2/4. 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 2/256:00 pm
SAN
- SOU
2 stops30h 10m
British Airways
Sun 3/112:15 pm
SOU
- SAN
2 stops35h 55m
British Airways
Deal found 2/4![British Airways logo]()
$5,447
This Delta deal was found by Cheapflights users on 2/3. 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 3/207:00 am
SAN
- SOU
2 stops18h 50m
Delta
Mon 3/309:05 am
SOU
- SAN
2 stops17h 17m
Delta
Deal found 2/3![Delta logo]()
$1,765
This Delta deal was found by Cheapflights users on 2/4. 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 3/2110:03 pm
SAN
- SOU
2 stops36h 02m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$907
This Delta deal was found by Cheapflights users on 2/4. 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 3/2110:03 pm
SAN
- SOU
2 stops36h 02m
Delta
Sun 3/295:20 pm
SOU
- SAN
2 stops29h 34m
Delta
Deal found 2/4![Delta logo]()
$1,196
This Delta deal was found by Cheapflights users on 2/4. 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 3/2210:03 pm
SAN
- SOU
2 stops51h 17m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$804
This Delta deal was found by Cheapflights users on 2/4. 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 3/2210:25 pm
SAN
- SOU
2 stops50h 55m
Delta
Sun 3/295:20 pm
SOU
- SAN
2 stops29h 34m
Delta
Deal found 2/4![Delta logo]()
$1,092
This oojo deal was found by Cheapflights users on 2/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/225:38 pm
SAN
- SOU
2 stops35h 17m
Multiple Airlines
Sun 3/295:05 pm
SOU
- SAN
2 stops49h 03m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$1,117
This Delta deal was found by Cheapflights users on 2/4. 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 3/2310:10 pm
SAN
- SOU
2 stops27h 10m
Delta
Mon 3/305:20 pm
SOU
- SAN
1 stop26h 30m
Delta
Deal found 2/4![Delta logo]()
$791
This Delta deal was found by Cheapflights users on 2/4. 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 3/2310:10 pm
SAN
- SOU
2 stops27h 10m
Delta
Sun 3/295:20 pm
SOU
- SAN
2 stops29h 34m
Delta
Deal found 2/4![Delta logo]()
$1,085
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 February 5, 2026.
Search for one-way flight options from San Diego to Portsmouth. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
This Delta deal was found by Cheapflights users on 2/2. 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.
Tue 7/71:40 pm
SAN
- SOU
1 stop19h 55m
Delta
Deal found 2/2![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 2/2. 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.
Sun 7/56:15 am
SAN
- SOU
2 stops27h 20m
Delta
Deal found 2/2![Delta logo]()
$600
This Delta deal was found by Cheapflights users on 2/2. 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.
Sat 7/410:00 pm
SAN
- SOU
2 stops35h 35m
Delta
Deal found 2/2![Delta logo]()
$636
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 February 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $805 (Delta) |
One-way from | $357 (Delta) |
Popular in | June |
Cheapest in | October |
Average price | $705 |
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 February 5, 2026.
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
Mon 3/23
10:10 pm-8:20 am
2 stops27h 10m
Southampton Eastleigh
Mon 3/30
5:20 pm-11:50 am
1 stop26h 30m
$791
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Tue 3/24
10:25 pm-5:25 pm
2 stops36h 00m
Southampton Eastleigh
Mon 3/30
5:20 pm-11:50 am
1 stop26h 30m
$791
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sun 3/22
10:03 pm-8:20 am
2 stops51h 17m
Southampton Eastleigh
Mon 3/30
5:20 pm-11:50 am
1 stop26h 30m
$804
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sat 3/21
10:03 pm-5:05 pm
2 stops36h 02m
Southampton Eastleigh
Mon 3/30
5:20 pm-5:51 pm
2 stops32h 31m
$935
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Mon 3/23
10:10 pm-8:20 am
2 stops27h 10m
Southampton Eastleigh
Sun 3/29
5:20 pm-2:54 pm
2 stops29h 34m
$1,085
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sun 3/22
5:38 pm-11:55 am
2 stops35h 17m
Southampton Eastleigh
Sun 3/29
5:05 pm-10:08 am
2 stops49h 03m
$1,117
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Sat 3/21
10:03 pm-5:05 pm
2 stops36h 02m
Southampton Eastleigh
Sun 3/29
5:20 pm-2:54 pm
2 stops29h 34m
$1,196
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Fri 3/20
7:00 am-8:50 am
2 stops18h 50m
Southampton Eastleigh
Sun 3/29
9:15 am-8:48 pm
2 stops19h 33m
$1,765
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Fri 3/20
7:00 am-8:50 am
2 stops18h 50m
Southampton Eastleigh
Mon 3/30
9:05 am-6:22 pm
2 stops17h 17m
$1,765
San DiegoSouthampton
SAN - SOU
SANSOU
San Diego
Tue 7/7
1:40 pm-5:35 pm
1 stop19h 55m
$357
Showing 1-10 of 14 results
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 $911). 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 February 5, 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 February 5, 2026.
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.
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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.
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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 February 5, 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 February 5, 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 2,558,603 searches. Data last updated February 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$181 | Average$1,087 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$552 | Average$874 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$556 | Average$844 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$567 | Average$768 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$574 | Average$827 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$577 | Average$907 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$578 | Average$706 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$593 | Average$843 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$620 | Average$742 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$620 | Average$847 | FlexibilityNo cancel fee | On-time76% |