How long is the flight from San Francisco to Portsmouth?

A quick flight from San Francisco to Portsmouth can take about 19h 10m. Delta provides one of the quickest options available for as low as $923. San Francisco and Portsmouth are separated by a distance of 5349 mi.

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.

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).

What are the cheapest flights from San Francisco to Portsmouth?

While on average a flight from San Francisco to Portsmouth is generally $2,500, our data shows the cheapest flight currently is $313. When looking at the most popular route, (San Francisco - Southampton Eastleigh), you can expect to pay $768 for that flight.

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

Consider American Airlines (87%), Aer Lingus (87%) or Alaska Airlines (87%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to Portsmouth.

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. 18 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.

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.

$430+ Flights from San Francisco to Portsmouth

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Cheap 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 December 16, 2025.

Thu 12/251:55 pmSFO - SOU

1 stop19h 05mDelta

Tue 1/65:35 pmSOU - SFO

2 stops50h 01mDelta

Deal found 12/15

$970

Wed 12/2412:26 pmSFO - SOU

2 stops44h 34mDelta

Tue 1/65:35 pmSOU - SFO

2 stops50h 01mDelta

Deal found 12/15

$980

Thu 12/251:55 pmSFO - SOU

1 stop19h 05mDelta

Sun 1/115:45 pmSOU - SFO

2 stops49h 06mDelta

Deal found 12/15

$992

Wed 12/245:15 pmSFO - SOU

2 stops39h 45mDelta

Sun 1/115:45 pmSOU - SFO

2 stops49h 06mDelta

Deal found 12/15

$1,002

Thu 12/251:55 pmSFO - SOU

1 stop19h 05mDelta

Thu 1/89:00 amSOU - SFO

2 stops33h 50mDelta

Deal found 12/15

$1,065

Wed 12/245:15 pmSFO - SOU

2 stops39h 45mDelta

Thu 1/89:00 amSOU - SFO

2 stops33h 50mDelta

Deal found 12/15

$1,075

Sat 12/278:17 pmSFO - SOU

2 stops37h 08mDelta

Thu 1/85:35 pmSOU - SFO

1 stop26h 15mDelta

Deal found 12/15

$1,515

Best flights from San Francisco to Portsmouth
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 December 16, 2025.

Thu 2/191:55 pmSFO - SOU

1 stop19h 10mDelta

Mon 2/238:50 amSOU - SFO

2 stops20h 58mDelta

Deal found 12/16

$923

Sun 2/86:20 pmSFO - SOU

1 stop17h 20mAer Lingus

Thu 2/124:05 pmSOU - SFO

1 stop31h 30mAer Lingus

Deal found 12/15

$1,340

Wed 12/2412:26 pmSFO - SOU

2 stops44h 34mDelta

Tue 1/65:35 pmSOU - SFO

2 stops50h 01mDelta

Deal found 12/15

$980

Wed 12/245:15 pmSFO - SOU

2 stops39h 45mDelta

Sun 1/115:45 pmSOU - SFO

2 stops49h 06mDelta

Deal found 12/15

$1,002

Wed 2/182:05 pmSFO - SOU

2 stops19h 00mDelta

Mon 2/238:50 amSOU - SFO

2 stops20h 07mDelta

Deal found 12/15

$1,013

Thu 12/256:00 amSFO - SOU

2 stops27h 00mDelta

Thu 1/89:00 amSOU - SFO

2 stops33h 50mDelta

Deal found 12/15

$1,069

Wed 2/181:55 pmSFO - SOU

1 stop19h 10mDelta

Sun 2/229:30 amSOU - SFO

2 stops19h 41mDelta

Deal found 12/14

$1,563

Fri 12/1910:30 amSFO - SOU

2 stops22h 30mDelta

Sun 4/125:20 pmSOU - SFO

2 stops33h 28mDelta

Deal found 12/15

$1,809

Sat 12/2010:45 pmSFO - SOU

2 stops25h 25mDelta

Sun 4/125:20 pmSOU - SFO

2 stops32h 48mDelta

Deal found 12/15

$1,809

Fri 12/261:55 pmSFO - SOU

1 stop34h 55mDelta

Thu 1/89:00 amSOU - SFO

2 stops33h 50mDelta

Deal found 12/15

$1,870

Last-minute flights from San Francisco to Portsmouth
Discover last-minute flight deals from San Francisco to Portsmouth. Data last updated December 16, 2025 and is based on user searches.

Wed 12/2412:26 pmSFO - SOU

2 stops44h 34mDelta

Tue 1/65:35 pmSOU - SFO

2 stops50h 01mDelta

Deal found 12/15

$980

Wed 12/245:15 pmSFO - SOU

2 stops39h 45mDelta

Sun 1/115:45 pmSOU - SFO

2 stops49h 06mDelta

Deal found 12/15

$1,002

Wed 12/245:15 pmSFO - SOU

2 stops39h 45mDelta

Thu 1/89:00 amSOU - SFO

2 stops33h 50mDelta

Deal found 12/15

$1,075

Thu 12/251:55 pmSFO - SOU

1 stop19h 05mDelta

Tue 1/65:35 pmSOU - SFO

2 stops50h 01mDelta

Deal found 12/15

$970

Thu 12/251:55 pmSFO - SOU

1 stop19h 05mDelta

Sun 1/115:45 pmSOU - SFO

2 stops49h 06mDelta

Deal found 12/15

$992

Thu 12/251:55 pmSFO - SOU

1 stop19h 05mDelta

Thu 1/89:00 amSOU - SFO

2 stops33h 50mDelta

Deal found 12/15

$1,065

Sat 12/278:17 pmSFO - SOU

2 stops37h 08mDelta

Thu 1/85:35 pmSOU - SFO

1 stop26h 15mDelta

Deal found 12/15

$1,515

One-way flights from San Francisco to Portsmouth
Search for one-way flight options from San Francisco to Portsmouth. Find affordable one-way fares based on user searches. Data last updated December 16, 2025.

Mon 4/275:45 pmSFO - SOU

1 stop30h 20mAer Lingus

Deal found 12/16

$430

Sun 3/11:55 pmSFO - SOU

1 stop19h 05mDelta

Deal found 12/16

$456

Tue 6/91:45 pmSFO - SOU

1 stop19h 05mDelta

Deal found 12/16

$459

Mon 6/810:45 pmSFO - SOU

2 stops34h 05mDelta

Deal found 12/16

$463

Thu 3/51:55 pmSFO - SOU

1 stop19h 05mDelta

Deal found 12/16

$502

Sun 12/281:55 pmSFO - SOU

1 stop19h 30mDelta

Deal found 12/15

$548

Wed 12/246:00 amSFO - SOU

2 stops42h 05mDelta

Deal found 12/15

$553

Mon 12/291:55 pmSFO - SOU

1 stop34h 15mDelta

Deal found 12/15

$563

Wed 1/145:20 pmSFO - SOU

1 stop18h 20mAer Lingus

Deal found 12/16

$577

Find flight deals from San Francisco to Portsmouth

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$768 (Delta)
One-way from	$430 (KAYAK)
Popular in	June
Cheapest in	September
Average price	$887

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. 16% potential increase in price ($153 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Thu 2/19

1:55 pm-5:05 pm

1 stop19h 10m

Southampton Eastleigh

Mon 2/23

8:50 am-9:48 pm

2 stops20h 58m

$923

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 12/24

12:26 pm-5:00 pm

2 stops44h 34m

Southampton Eastleigh

Tue 1/6

5:35 pm-11:36 am

2 stops50h 01m

$980

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 12/24

5:15 pm-5:00 pm

2 stops39h 45m

Southampton Eastleigh

Sun 1/11

5:45 pm-10:51 am

2 stops49h 06m

$1,002

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 2/18

2:05 pm-5:05 pm

2 stops19h 00m

Southampton Eastleigh

Mon 2/23

8:50 am-8:57 pm

2 stops20h 07m

$1,013

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Thu 12/25

6:00 am-5:00 pm

2 stops27h 00m

Southampton Eastleigh

Thu 1/8

9:00 am-10:50 am

2 stops33h 50m

$1,069

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 2/8

6:20 pm-7:40 pm

1 stop17h 20m

Southampton Eastleigh

Thu 2/12

4:05 pm-3:35 pm

1 stop31h 30m

$1,340

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 2/18

1:55 pm-5:05 pm

1 stop19h 10m

Southampton Eastleigh

Sun 2/22

9:30 am-9:11 pm

2 stops19h 41m

$1,563

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Fri 12/19

10:30 am-5:00 pm

2 stops22h 30m

Southampton Eastleigh

Sun 4/12

5:20 pm-6:48 pm

2 stops33h 28m

$1,809

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sat 12/20

10:45 pm-8:10 am

2 stops25h 25m

Southampton Eastleigh

Sun 4/12

5:20 pm-6:08 pm

2 stops32h 48m

$1,809

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Fri 12/26

1:55 pm-8:50 am

1 stop34h 55m

Southampton Eastleigh

Thu 1/8

9:00 am-10:50 am

2 stops33h 50m

$1,870

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 19 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.

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, 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 $813). 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?

A simple way to save on the total cost of your ticket is to fly from San Francisco to Portsmouth in the afternoon. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from San Francisco to Portsmouth?

Travelers seeking maximum savings on their San Francisco to Portsmouth flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Wednesday 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

The most flights from SFO to P0R are scheduled on a Monday (31 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (25 on average).

Reviews of airlines servicing Portsmouth

Get a feel of what it's like to fly with Delta 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.

Delta

7.9

Good

8,008 reviews

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

7.9

Good

8,008 reviews

Delta

7.9

Good

8,008 reviews

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

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. 18 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 10m. Delta provides one of the quickest options available for as low as $923. San Francisco and Portsmouth are separated by a distance of 5349 mi.
What are the most reliable airlines from San Francisco to Portsmouth?
Consider American Airlines (87%), Aer Lingus (87%) or Alaska Airlines (87%) 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 $2,500, our data shows the cheapest flight currently is $313. When looking at the most popular route, (San Francisco - Southampton Eastleigh), you can expect to pay $768 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, 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 $813). 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

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Complete your trip

Portsmouth car rentals

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Top 10 airlines flying from San Francisco to Portsmouth

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$151	Average$826	FlexibilityNo cancel fee	On-time62%
Scandinavian Airlines	Cheapest$364	Average$580	FlexibilityNo cancel fee	On-time77%
TAP AIR PORTUGAL	Cheapest$371	Average$558	FlexibilityNo cancel fee	On-timeN/A
Alaska Airlines	Cheapest$494	Average$655	FlexibilityNo cancel fee	On-time75%
SWISS	Cheapest$513	Average$703	FlexibilityNo cancel fee	On-time79%
British Airways	Cheapest$514	Average$711	FlexibilityNo cancel fee	On-time70%
Delta	Cheapest$541	Average$845	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$568	Average$847	FlexibilityNo cancel fee	On-time72%
United Airlines	Cheapest$572	Average$862	FlexibilityNo cancel fee	On-time69%
Iberia	Cheapest$572	Average$673	FlexibilityNo cancel fee	On-time77%

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$430+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Francisco to Portsmouth with Cheapflights

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Cheap flight deals from San Francisco to Portsmouth

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 December 16, 2025.

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 December 16, 2025.

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 December 16, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Portsmouth that are best for you.

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.

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?

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 December 16, 2025.

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.

Weekly flight availability from San Francisco to Portsmouth

Reviews of airlines servicing Portsmouth

Get a feel of what it's like to fly with Delta 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.

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?

How long is the flight from San Francisco to Portsmouth?

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

What are the cheapest flights from San Francisco to Portsmouth?

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Portsmouth

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Top 10 airlines flying from San Francisco to Portsmouth

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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 December 16, 2025.