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Portsmouth

$454+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap 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 September 15, 2025.

Round-trip from

$736
(Delta)

One-way from

$454
(Ovago)

Popular in

June

Cheapest in

October

Average price

$663
From San Francisco to Portsmouth
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One-way flight from San Francisco to Portsmouth
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Highest demand for flights based on searches. 16% potential increase in price ($150 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from San Francisco to Portsmouth

Cheapest flights from San Francisco to Portsmouth
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 September 15, 2025.

This Delta deal was found by Cheapflights users on 9/13. 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 9/231:45 pmSFO - SOU
1 stop19h 15mDelta
Tue 10/75:35 pmSOU - SFO
1 stop26h 10mDelta
Deal found 9/13$736
This KLM deal was found by Cheapflights users on 9/14. 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 10/297:15 amSFO - SOU
2 stops18h 05mKLM
Wed 11/55:30 pmSOU - SFO
1 stop26h 20mKLM
Deal found 9/14$740
This Delta deal was found by Cheapflights users on 9/15. 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 10/151:45 pmSFO - SOU
1 stop19h 15mDelta
Tue 10/219:20 amSOU - SFO
2 stops18h 10mDelta
Deal found 9/15$746
This Delta deal was found by Cheapflights users on 9/15. 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 10/147:05 amSFO - SOU
2 stops17h 40mDelta
Thu 10/239:20 amSOU - SFO
2 stops18h 10mDelta
Deal found 9/15$788
This Delta deal was found by Cheapflights users on 9/13. 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 9/251:45 pmSFO - SOU
1 stop35h 00mDelta
Mon 10/65:35 pmSOU - SFO
1 stop26h 10mDelta
Deal found 9/13$804
This Delta deal was found by Cheapflights users on 9/15. 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 12/21:55 pmSFO - SOU
1 stop19h 05mDelta
Wed 1/145:30 pmSOU - SFO
2 stops29h 43mDelta
Deal found 9/15$822
This Delta deal was found by Cheapflights users on 9/13. 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 9/2312:45 amSFO - SOU
2 stops24h 00mDelta
Wed 10/89:20 amSOU - SFO
2 stops18h 10mDelta
Deal found 9/13$826
This Delta deal was found by Cheapflights users on 9/15. 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 12/65:05 pmSFO - SOU
2 stops40h 20mDelta
Thu 1/85:30 pmSOU - SFO
2 stops33h 02mDelta
Deal found 9/15$832
This Delta deal was found by Cheapflights users on 9/14. 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 9/141:45 pmSFO - SOU
1 stop35h 00mDelta
Sat 9/206:05 pmSOU - SFO
2 stops37h 52mDelta
Deal found 9/14$852
This Delta deal was found by Cheapflights users on 9/15. 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 12/47:00 amSFO - SOU
2 stops17h 05mDelta
Sun 1/115:45 pmSOU - SFO
2 stops34h 50mDelta
Deal found 9/15$885

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 September 15, 2025.
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

Tue 10/14

1:45 pm-5:00 pm

1 stop19h 15m

Southampton Eastleigh

Thu 10/23

5:35 pm-11:45 am

1 stop26h 10m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 12/7

1:55 pm-5:25 pm

1 stop19h 30m

Southampton Eastleigh

Mon 1/12

5:30 pm-11:50 am

1 stop26h 20m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 12/8

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Tue 1/13

5:30 pm-11:50 am

1 stop26h 20m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 9/28

1:45 pm-8:45 am

1 stop35h 00m

Southampton Eastleigh

Tue 10/7

5:35 pm-11:45 am

1 stop26h 10m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 9/29

1:45 pm-5:00 pm

1 stop19h 15m

Southampton Eastleigh

Tue 10/7

5:35 pm-11:45 am

1 stop26h 10m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 9/29

1:45 pm-5:00 pm

1 stop19h 15m

Southampton Eastleigh

Wed 10/8

5:35 pm-11:45 am

1 stop26h 10m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 9/29

1:45 pm-5:00 pm

1 stop19h 15m

Southampton Eastleigh

Mon 10/6

5:35 pm-11:45 am

1 stop26h 10m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 12/8

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Mon 1/12

5:30 pm-11:50 am

1 stop26h 20m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 10/14

1:45 pm-5:00 pm

1 stop19h 15m

Southampton Eastleigh

Wed 10/22

9:20 am-11:45 am

1 stop34h 25m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 9/23

1:45 pm-5:00 pm

1 stop19h 15m

Southampton Eastleigh

Tue 10/7

5:35 pm-11:45 am

1 stop26h 10m

$736

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 18 results
1
2

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.
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

What is the cheapest month to book a flight from San Francisco to Portsmouth?

Currently, November is the cheapest month in which you can book a flight from San Francisco to Portsmouth (average of $661). Flying from San Francisco to Portsmouth in June is currently the most expensive (average of $1,097). 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 September 15, 2025.

When flying from San Francisco to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 December 16, 2024.

Travelers seeking maximum savings on their San Francisco to Portsmouth flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday afternoons 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 September 15, 2025.

The most flights from SFO to P0R are scheduled on a Monday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (42 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 September 15, 2025.
Get a feel of what it's like to fly with KLM and 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.
KLM
7.8
Good
1,385 reviews

Crew

8.4

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,385 reviews
KLM
7.8
Good
1,385 reviews

Crew

8.4

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Aer Lingus
7.2
Good
1,270 reviews
KLM
7.8
Good
1,385 reviews

Crew

8.4

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

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.

  • What airport do you fly from for flights from San Francisco to Portsmouth?

    San Francisco (SFO), located 11.8 mi from the city center, is the airport you fly out of when you book flights from San Francisco to Portsmouth. 17 airlines have flights from San Francisco to Portsmouth on a regular basis. Booking flights from San Francisco to Portsmouth should not be difficult; the airport handles an average of 0 outbound flights to Portsmouth per day.

  • How long is the flight from San Francisco to Portsmouth?

    A quick flight from San Francisco to Portsmouth can take about 19h 15m. Delta provides one of the quickest options available for as low as $736. San Francisco and Portsmouth are separated by a distance of 5349 mi.

  • What are the most reliable airlines from San Francisco to Portsmouth?

    Consider Iberia (89%), KLM (88%) or Air France (88%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to Portsmouth.

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

    While on average a flight from San Francisco to Portsmouth is generally $2,565, our data shows the cheapest flight currently is $354. When looking at the most popular route, (San Francisco - Southampton Eastleigh), you can expect to pay $740 for that flight.

  • Can I find deals for flights from San Francisco to Portsmouth that include hotel bookings?

    Yes. In addition to deals on San Francisco to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Portsmouth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Portsmouth.

  • Can I find deals for business class flights from San Francisco to Portsmouth?

    Yes. Cheapflights offers flight deals from San Francisco 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 Francisco to Portsmouth?

    Currently, November is the cheapest month in which you can book a flight from San Francisco to Portsmouth (average of $661). Flying from San Francisco to Portsmouth in June is currently the most expensive (average of $1,097). 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

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$195Average$815FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$334Average$601FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$433Average$575FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$514Average$736FlexibilityNo cancel feeOn-time70%
SWISSCheapest$541Average$712FlexibilityNo cancel feeOn-time79%
DeltaCheapest$564Average$832FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$570Average$914FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$571Average$843FlexibilityNo cancel feeOn-time76%
IberiaCheapest$572Average$674FlexibilityNo cancel feeOn-time77%
FinnairCheapest$573Average$679FlexibilityNo cancel feeOn-time76%

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