$325+ Cheap flights from San Francisco (SFO) 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
Mar 5 — Mar 121
1 adult, Economy
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Find cheap flights from San Francisco 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 Francisco to Portsmouth
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Cheapest flights from San Francisco to PortsmouthExplore the most affordable flight options available from San Francisco to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.
Explore the most affordable flight options available from San Francisco to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.
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.
Sun 8/161:45 pm
SFO
- SOU
1 stop35h 00m
Delta
Tue 8/256:05 pm
SOU
- SFO
1 stop25h 40m
Delta
Deal found 2/3![Delta logo]()
$792
This Delta deal was found by Cheapflights users on 2/1. 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 8/171:45 pm
SFO
- SOU
1 stop19h 50m
Delta
Mon 8/246:05 pm
SOU
- SFO
1 stop25h 40m
Delta
Deal found 2/1![Delta logo]()
$794
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.
Tue 10/61:00 pm
SFO
- SOU
2 stops19h 50m
KLM
Mon 10/195:20 pm
SOU
- SFO
1 stop26h 25m
KLM
Deal found 2/3![KLM logo]()
$796
This Delta deal was found by Cheapflights users on 2/1. 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 8/911:45 pm
SFO
- SOU
2 stops33h 50m
Delta
Wed 8/199:15 am
SOU
- SFO
1 stop34h 30m
Delta
Deal found 2/1![Delta logo]()
$798
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.
Sun 8/161:45 pm
SFO
- SOU
1 stop35h 00m
Delta
Wed 8/266:05 pm
SOU
- SFO
2 stops29h 58m
Delta
Deal found 2/3![Delta logo]()
$801
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.
Sun 8/161:45 pm
SFO
- SOU
1 stop35h 00m
Delta
Mon 8/246:05 pm
SOU
- SFO
2 stops31h 45m
Delta
Deal found 2/3![Delta logo]()
$802
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 8/171:45 pm
SFO
- SOU
1 stop19h 50m
Delta
Wed 8/266:05 pm
SOU
- SFO
2 stops29h 58m
Delta
Deal found 2/2![Delta logo]()
$803
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 8/3110:45 pm
SFO
- SOU
2 stops34h 05m
Delta
Wed 9/99:05 am
SOU
- SFO
2 stops17h 03m
Delta
Deal found 2/2![Delta logo]()
$808
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 9/19:00 pm
SFO
- SOU
2 stops35h 50m
Delta
Wed 9/99:05 am
SOU
- SFO
1 stop34h 40m
Delta
Deal found 2/2![Delta logo]()
$811
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 8/307:00 am
SFO
- SOU
2 stops25h 50m
Delta
Thu 9/109:05 am
SOU
- SFO
1 stop34h 40m
Delta
Deal found 2/2![Delta logo]()
$818
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.
Sun 8/161:45 pm
SFO
- SOU
1 stop35h 00m
Delta
Sun 8/239:15 am
SOU
- SFO
1 stop34h 30m
Delta
Deal found 2/3![Delta logo]()
$822
Best flights from San Francisco to PortsmouthDiscover carefully curated flight deals from San Francisco to Portsmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 2026.
Discover carefully curated flight deals from San Francisco to Portsmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 3, 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.
Wed 4/1510:32 am
SFO
- SOU
2 stops22h 18m
Delta
Tue 4/215:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/2![Delta logo]()
$798
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 7/266:00 am
SFO
- SOU
2 stops18h 45m
Delta
Thu 8/139:15 am
SOU
- SFO
2 stops20h 20m
Delta
Deal found 2/2![Delta logo]()
$828
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 3/232:55 pm
SFO
- SOU
1 stop19h 05m
Delta
Thu 6/45:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/2![Delta logo]()
$837
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 3/232:55 pm
SFO
- SOU
1 stop34h 25m
Delta
Wed 6/35:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/2![Delta logo]()
$837
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 3/247:00 am
SFO
- SOU
2 stops18h 20m
Delta
Mon 6/15:20 pm
SOU
- SFO
2 stops31h 09m
Delta
Deal found 2/2![Delta logo]()
$851
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 4/151:45 pm
SFO
- SOU
1 stop19h 05m
Delta
Wed 4/225:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/2![Delta logo]()
$866
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 4/1510:32 am
SFO
- SOU
2 stops22h 18m
Delta
Mon 4/209:05 am
SOU
- SFO
1 stop34h 40m
Delta
Deal found 2/2![Delta logo]()
$870
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.
Fri 7/247:00 am
SFO
- SOU
2 stops17h 45m
Delta
Thu 8/139:15 am
SOU
- SFO
2 stops18h 40m
Delta
Deal found 2/2![Delta logo]()
$960
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.
Sun 7/191:45 pm
SFO
- SOU
1 stop19h 50m
Delta
Tue 7/289:15 am
SOU
- SFO
2 stops20h 20m
Delta
Deal found 2/3![Delta logo]()
$993
This Delta deal was found by Cheapflights users on 1/31. 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 7/131:45 pm
SFO
- SOU
1 stop35h 00m
Delta
Wed 8/56:05 pm
SOU
- SFO
1 stop25h 40m
Delta
Deal found 1/31![Delta logo]()
$1,005
This Delta deal was found by Cheapflights users on 1/31. 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 7/121:45 pm
SFO
- SOU
1 stop19h 50m
Delta
Wed 8/56:05 pm
SOU
- SFO
1 stop25h 40m
Delta
Deal found 1/31![Delta logo]()
$1,005
This Delta deal was found by Cheapflights users on 1/31. 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 7/157:00 am
SFO
- SOU
2 stops26h 35m
Delta
Wed 8/56:05 pm
SOU
- SFO
1 stop25h 40m
Delta
Deal found 1/31![Delta logo]()
$1,009
Last-minute flights from San Francisco to PortsmouthDiscover last-minute flight deals from San Francisco to Portsmouth. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Portsmouth. Data last updated February 3, 2026 and is based on user searches.
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.
Sun 3/11:55 pm
SFO
- SOU
1 stop19h 10m
Delta
Tue 4/219:05 am
SOU
- SFO
1 stop34h 40m
Delta
Deal found 2/3![Delta logo]()
$793
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.
Sun 3/17:00 am
SFO
- SOU
2 stops41h 20m
Delta
Thu 4/235:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/3![Delta logo]()
$797
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.
Sun 3/11:55 pm
SFO
- SOU
1 stop19h 10m
Delta
Mon 4/205:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/3![Delta logo]()
$865
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.
Sun 3/11:55 pm
SFO
- SOU
1 stop19h 10m
Delta
Sat 4/255:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/3![Delta logo]()
$869
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.
Thu 3/51:55 pm
SFO
- SOU
1 stop19h 05m
Delta
Wed 4/229:05 am
SOU
- SFO
1 stop34h 40m
Delta
Deal found 2/3![Delta logo]()
$823
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.
Thu 3/51:55 pm
SFO
- SOU
1 stop19h 05m
Delta
Mon 4/205:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/3![Delta logo]()
$894
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.
Thu 3/51:55 pm
SFO
- SOU
1 stop19h 05m
Delta
Sat 4/255:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/3![Delta logo]()
$898
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 3/61:55 pm
SFO
- SOU
1 stop19h 05m
Delta
Tue 4/215:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/3![Delta logo]()
$925
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.
Sat 3/710:55 pm
SFO
- SOU
2 stops34h 10m
Delta
Tue 4/219:05 am
SOU
- SFO
2 stops19h 46m
Delta
Deal found 2/3![Delta logo]()
$807
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 3/232:55 pm
SFO
- SOU
1 stop19h 05m
Delta
Thu 6/45:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/2![Delta logo]()
$837
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 3/235:50 am
SFO
- SOU
2 stops28h 10m
Delta
Tue 6/25:20 pm
SOU
- SFO
1 stop26h 25m
Delta
Deal found 2/2![Delta logo]()
$841
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 3/247:00 am
SFO
- SOU
2 stops18h 20m
Delta
Mon 6/15:20 pm
SOU
- SFO
2 stops31h 09m
Delta
Deal found 2/2![Delta logo]()
$851
One-way flights from San Francisco to PortsmouthSearch for one-way flight options from San Francisco to Portsmouth. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
Search for one-way flight options from San Francisco to Portsmouth. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
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.
Wed 5/61:45 pm
SFO
- SOU
1 stop19h 05m
Delta
Deal found 2/3![Delta logo]()
$325
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.
Sat 5/91:00 pm
SFO
- SOU
2 stops35h 35m
Delta
Deal found 2/3![Delta logo]()
$344
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.
Thu 5/71:45 pm
SFO
- SOU
1 stop35h 00m
Delta
Deal found 2/3![Delta logo]()
$375
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:35 pm
SFO
- SOU
1 stop17h 55m
Aer Lingus
Deal found 2/2![Aer Lingus logo]()
$417
This Delta deal was found by Cheapflights users on 2/1. 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 3/301:45 pm
SFO
- SOU
1 stop34h 50m
Delta
Deal found 2/1![Delta logo]()
$476
This Delta deal was found by Cheapflights users on 2/1. 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 4/310:40 pm
SFO
- SOU
2 stops34h 10m
Delta
Deal found 2/1![Delta logo]()
$575
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:35 pm
SFO
- SOU
1 stop17h 55m
Aer Lingus
Deal found 2/2![Aer Lingus logo]()
$656
This KAYAK deal was found by Cheapflights users on 2/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:35 pm
SFO
- SOU
1 stop31h 05m
Aer Lingus
Deal found 2/1![Aer Lingus logo]()
$666
Find flight deals from San Francisco to Portsmouth
Keep the following information in mind while searching for San Francisco to Portsmouth flight deals. Data was last updated February 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $793 (Delta) |
One-way from | $325 (Delta) |
Popular in | June |
Cheapest in | February |
Average price | $660 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco 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 3, 2026.
Use the filters below to find and compare flights from San Francisco to Portsmouth that are best for you.
Fly from
San Francisco
Fly to
Portsmouth
Route
Depart
Return
Price
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Wed 4/15
10:32 am-4:50 pm
2 stops22h 18m
Southampton Eastleigh
Tue 4/21
5:20 pm-11:45 am
1 stop26h 25m
$798
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Sun 7/26
6:00 am-8:45 am
2 stops18h 45m
Southampton Eastleigh
Thu 8/13
9:15 am-9:35 pm
2 stops20h 20m
$828
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Mon 3/23
2:55 pm-5:00 pm
1 stop19h 05m
Southampton Eastleigh
Thu 6/4
5:20 pm-11:45 am
1 stop26h 25m
$837
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Mon 3/23
2:55 pm-8:20 am
1 stop34h 25m
Southampton Eastleigh
Wed 6/3
5:20 pm-11:45 am
1 stop26h 25m
$837
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Tue 3/24
7:00 am-8:20 am
2 stops18h 20m
Southampton Eastleigh
Mon 6/1
5:20 pm-4:29 pm
2 stops31h 09m
$851
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Wed 4/15
1:45 pm-4:50 pm
1 stop19h 05m
Southampton Eastleigh
Wed 4/22
5:20 pm-11:45 am
1 stop26h 25m
$866
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Wed 4/15
10:32 am-4:50 pm
2 stops22h 18m
Southampton Eastleigh
Mon 4/20
9:05 am-11:45 am
1 stop34h 40m
$870
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Fri 7/24
7:00 am-8:45 am
2 stops17h 45m
Southampton Eastleigh
Thu 8/13
9:15 am-7:55 pm
2 stops18h 40m
$960
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Sun 7/19
1:45 pm-5:35 pm
1 stop19h 50m
Southampton Eastleigh
Tue 7/28
9:15 am-9:35 pm
2 stops20h 20m
$993
San FranciscoSouthampton
SFO - SOU
SFOSOU
San Francisco
Mon 7/13
1:45 pm-8:45 am
1 stop35h 00m
Southampton Eastleigh
Wed 8/5
6:05 pm-11:45 am
1 stop25h 40m
$1,005
Showing 1-10 of 20 results
Best time to book a flight from San Francisco to Portsmouth
Have a flexible travel schedule? Discover the best time to fly to Portsmouth from San Francisco with our price prediction graph.
SFO-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 Francisco to Portsmouth
SFO-P0R
SFO-SOU
What is the cheapest month to book a flight from San Francisco to Portsmouth?
Currently, October is the cheapest month in which you can book a flight from San Francisco to Portsmouth (average of $497). Flying from San Francisco to Portsmouth in June is currently the most expensive (average of $801). 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 SFO to P0R?
Find hourly flight availability from San Francisco 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 3, 2026.
A simple way to save on the total cost of your ticket is to fly from San Francisco to Portsmouth in the morning. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight at noon.
What is the cheapest day to fly from San Francisco to Portsmouth?
Use this chart to determine the cheapest time to fly round-trip from San Francisco to Portsmouth. Price data was last updated on January 31, 2026.
Travelers seeking maximum savings on their San Francisco to Portsmouth flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from San Francisco to Portsmouth
Explore weekly flight availability from San Francisco 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 3, 2026.
The most flights from SFO to P0R are scheduled on a Monday (31 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (18 on average).
Reviews of airlines servicing Portsmouth
Get insights into the airlines that provide service to Portsmouth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portsmouth. Reviews last updated February 3, 2026.
Get a feel of what it's like to fly with Aer Lingus from San Francisco to Portsmouth by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
6.6
Comfort
7.1
Overall
7.2
Crew
8.0
Boarding
7.4
Entertainment
6.9
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
SFO - DUB
Food
6.6
Comfort
7.1
Overall
7.2
Crew
8.0
Boarding
7.4
Entertainment
6.9
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
SFO - DUB
Related info for your journey
Find useful and relevant information for your journey from San Francisco 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 Francisco to Portsmouth
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San Francisco and Portsmouth flights
Browse other San Francisco and Portsmouth flight options. Last updated on February 3, 2026.
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Top 10 airlines flying from San Francisco to Portsmouth
Discover the top 10 airlines that operate flights from San Francisco 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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$854 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$334 | Average$643 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$339 | Average$536 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$494 | Average$655 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$513 | Average$703 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$514 | Average$704 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$518 | Average$825 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$561 | Average$683 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$566 | Average$847 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$567 | Average$860 | FlexibilityNo cancel fee | On-time69% |