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$408+ 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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$825
(Delta)

One-way from

$408
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$692
Provider with most accurate pricing for San Francisco-London (LON) flight deals.
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Provider most trusted by Cheapflights users for San Francisco-London (LON) flights.
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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. 19% potential increase in price ($191 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Delta deal was found by Cheapflights users on 3/31. 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 4/165:40 amSFO - SOU
2 stops19h 05mDelta
Sun 4/206:25 pmSOU - SFO
1 stop25h 20mDelta
Deal found 3/31$825
This KLM deal was found by Cheapflights users on 3/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:00 amSFO - SOU
2 stops17h 50mKLM
Wed 9/179:20 amSOU - SFO
1 stop34h 25mKLM
Deal found 3/31$842
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/275:45 pmSFO - SOU
1 stop17h 45mAer Lingus
Wed 10/89:10 amSOU - SFO
2 stops21h 52mAer Lingus
Deal found 3/30$981
This Orbitz deal was found by Cheapflights users on 3/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:49 pmSFO - SOU
2 stops40h 41mMultiple Airlines
Wed 10/89:10 amSOU - SFO
2 stops21h 52mMultiple Airlines
Deal found 3/30$998
This British Airways deal was found by Cheapflights users on 3/30. 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.
Sat 8/235:45 pmSFO - SOU
1 stop17h 45mBritish Airways
Fri 8/298:30 amSOU - SFO
2 stops16h 55mBritish Airways
Deal found 3/30$2,015

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 March 31, 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

Wed 4/16

5:40 am-8:45 am

2 stops19h 05m

Southampton Eastleigh

Sun 4/20

6:25 pm-11:45 am

1 stop25h 20m

$825

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 9/1

7:00 am-8:50 am

2 stops17h 50m

Southampton Eastleigh

Wed 9/17

9:20 am-11:45 am

1 stop34h 25m

$842

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sat 9/27

5:45 pm-7:30 pm

1 stop17h 45m

Southampton Eastleigh

Wed 10/8

9:10 am-11:02 pm

2 stops21h 52m

$981

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sat 9/27

6:49 pm-7:30 pm

2 stops40h 41m

Southampton Eastleigh

Wed 10/8

9:10 am-11:02 pm

2 stops21h 52m

$998

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sat 8/23

5:45 pm-7:30 pm

1 stop17h 45m

Southampton Eastleigh

Fri 8/29

8:30 am-5:25 pm

2 stops16h 55m

$2,015

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Fri 7/18

6:05 pm-9:10 am

3 stops55h 05m

$408

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sat 4/5

11:59 pm-8:45 am

2 stops24h 46m

$497

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 9/14

11:59 pm-8:15 am

2 stops24h 16m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

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 $1,110). 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 March 31, 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. Monday evenings 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 March 31, 2025.

The most flights from SFO to P0R are scheduled on a Monday (37 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (37 on average).

Rainfall in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

Temperature in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portsmouth, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

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 March 31, 2025.
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,061 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,713 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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. 19 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.

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

    Consider United Airlines (86%), Iberia (86%) or American Airlines (84%) 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 $3,188, our data shows the cheapest flight currently is $404. When looking at the most popular route, (San Francisco - Southampton Eastleigh), you can expect to pay $842 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 $1,110). 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.

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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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$290Average$801FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$320Average$578FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$428Average$535FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$465Average$663FlexibilityNo cancel feeOn-time76%
DeltaCheapest$554Average$874FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$555Average$734FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$557Average$993FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$572Average$674FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$584Average$1,023FlexibilityNo cancel feeOn-time62%
KLMCheapest$586Average$884FlexibilityNo cancel feeOn-time75%
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