HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$496+ 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

Keep the following information in mind while searching for San Francisco to Portsmouth flight deals. Data was last updated February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$769
(Delta)

One-way from

$496
(Delta)

Popular in

February

Cheapest in

November

Average price

$2,175
Provider with most accurate pricing for San Francisco-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-London (LON) flights.
Search Deals
From San Francisco to Portsmouth
Search Deals
One-way flight from San Francisco to Portsmouth
Search Deals
Highest demand for flights based on searches. 46% potential increase in price ($1,007 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($112 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 22, 2025.

This Delta deal was found by Cheapflights users on 2/21. 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 3/197:10 amSFO - SOU
2 stops18h 20mDelta
Wed 3/269:00 amSOU - SFO
2 stops22h 22mDelta
Deal found 2/21$769
This KLM deal was found by Cheapflights users on 2/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/51:45 pmSFO - SOU
1 stop35h 00mKLM
Sat 5/176:05 pmSOU - SFO
1 stop25h 40mKLM
Deal found 2/22$833
This Gurufare deal was found by Cheapflights users on 2/22. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/45:45 pmSFO - SOU
1 stop17h 45mMultiple Airlines
Sun 9/148:55 amSOU - SFO
2 stops36h 55mMultiple Airlines
Deal found 2/22$1,194
This Cheapflightsfares deal was found by Cheapflights users on 2/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/45:45 pmSFO - SOU
1 stop17h 45mAer Lingus
Sun 9/149:10 amSOU - SFO
1 stop14h 35mAer Lingus
Deal found 2/22$1,267
This British Airways deal was found by Cheapflights users on 2/21. 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 3/226:20 pmSFO - SOU
1 stop14h 15mBritish Airways
Sat 3/298:55 amSOU - SFO
2 stops17h 50mBritish Airways
Deal found 2/21$1,952

Find flights from San Francisco to Portsmouth within your budget

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 22, 2025.

Fly from

San Francisco

Fly to

Portsmouth

Route

Depart

Return

Price

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 3/19

7:10 am-8:30 am

2 stops18h 20m

Southampton Eastleigh

Wed 3/26

9:00 am-12:22 am

2 stops22h 22m

$769

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 5/5

1:45 pm-8:45 am

1 stop35h 00m

Southampton Eastleigh

Sat 5/17

6:05 pm-11:45 am

1 stop25h 40m

$833

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sat 3/22

6:20 pm-3:35 pm

1 stop14h 15m

Southampton Eastleigh

Sat 3/29

8:55 am-7:45 pm

2 stops17h 50m

$1,952

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sat 4/5

10:50 pm-8:45 am

2 stops25h 55m

$496

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

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.

Travel insights for flights from San Francisco to Portsmouth

Get recent, data-driven insights about flights from San Francisco to Portsmouth including ideal travel times, pricing trends, and more.

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 $1,136). 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 22, 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 March 3, 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 February 22, 2025.

The most flights from SFO to P0R are scheduled on a Monday (33 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (27 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 February 22, 2025.
Delta
8.0
Very good
8,203 reviews

Food

7.3

Boarding

8.2

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

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
8,203 reviews
Delta
8.0
Very good
8,203 reviews

Food

7.3

Boarding

8.2

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

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
1,330 reviews
Delta
8.0
Very good
8,203 reviews

Food

7.3

Boarding

8.2

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

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
6,759 reviews
Delta
8.0
Very good
8,203 reviews

Food

7.3

Boarding

8.2

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

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 Air Canada (85%), Austrian Airlines (85%) or United Airlines (85%) 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 $2,258, our data shows the cheapest flight currently is $387. When looking at the most popular route, (San Francisco - Southampton Eastleigh), you can expect to pay $879 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 $1,136). 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

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.

Alternative routes for San Francisco to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to London City flights
San Francisco to London City flights
San Francisco to Gatwick flights
Los Angeles to Gatwick flights
San Diego to Heathrow flights
Ontario to Heathrow flights
Los Angeles to Luton flights
Las Vegas to Heathrow flights
San Diego to Gatwick flights
San Diego to London City flights
Oakland to Heathrow flights
San Francisco to Edinburgh flights
San Jose to Heathrow flights
Los Angeles to Edinburgh flights
Los Angeles to Stansted flights
Las Vegas to London City flights
Santa Ana to Heathrow flights
Sacramento to Heathrow flights
Las Vegas to Gatwick flights
San Francisco to Stansted flights
San Francisco to Manchester flights
San Jose to Gatwick flights
Los Angeles to Manchester flights
San Diego to Edinburgh flights
Burbank to Heathrow flights
Los Angeles to Southend flights
Sacramento to Gatwick flights
Los Angeles to Birmingham flights
Los Angeles to Southampton flights
Oakland to Gatwick flights
Long Beach to Heathrow flights
San Jose to Edinburgh flights
San Francisco to Southampton flights
San Francisco to Luton flights
Santa Ana to Gatwick flights
Ontario to Edinburgh flights
Reno to Heathrow flights
Sacramento to London City flights
Santa Rosa to Heathrow flights
San Jose to Manchester flights
Ontario to Manchester flights
San Jose to London City flights
Fresno to Heathrow flights
Medford to Heathrow flights
San Francisco to Birmingham flights
Burbank to Manchester flights
Los Angeles to Liverpool flights
Oakland to Edinburgh flights

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 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$428Average$541FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$465Average$658FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$492Average$584FlexibilityNo cancel feeOn-time77%
SWISSCheapest$555Average$752FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$557Average$1,044FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$567Average$769FlexibilityNo cancel feeOn-time72%
IberiaCheapest$571Average$677FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$582Average$967FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$582Average$921FlexibilityNo cancel feeOn-time71%
KLMCheapest$586Average$874FlexibilityNo cancel feeOn-time75%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.