How long is the flight from Cardiff to San Francisco?

There are many flights that can get you from Cardiff to San Francisco in 20h 04m. Fly via KLM, Air France, or Delta to get the fastest option. There are 5267 mi between Cardiff and San Francisco. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

What is the cheapest time of day to fly from CWL to SFO?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Cardiff to San Francisco as you normally would.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Cardiff to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£369+ Cheap Flights from Cardiff to San Francisco

Cheap flight deals from Cardiff to San Francisco

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Cardiff to San Francisco
Explore the most affordable flight options available from Cardiff to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Mon 28/909:45 -

1 stop34h 00m

Mon 5/1013:45 -

1 stop35h 30m

Deal found 14/8£609

Tue 29/917:15 -

1 stop26h 30m

Tue 6/1014:15 -

2 stops18h 30m

Deal found 15/8£611

Mon 28/917:15 -

1 stop26h 30m

Mon 5/1014:15 -

2 stops18h 30m

Deal found 14/8£618

Tue 29/909:45 -

2 stops22h 06m

Tue 6/1014:15 -

2 stops18h 30m

Deal found 15/8£626

Sun 27/917:15 -

1 stop26h 30m

Sun 4/1023:50 -

2 stops25h 25m

Deal found 13/8£633

Wed 16/909:45 -

2 stops20h 04m

Tue 22/906:00 -

2 stops19h 15m

Deal found 14/8£637

Sun 27/909:50 -

1 stop33h 55m

Sun 4/1013:45 -

1 stop35h 30m

Deal found 13/8£638

Sun 27/917:15 -

2 stops51h 05m

Sun 4/1021:43 -

2 stops27h 32m

Deal found 13/8£643

Sat 5/909:45 -

2 stops20h 48m

Fri 11/907:00 -

2 stops18h 15m

Deal found 17/8£671

Wed 16/917:15 -

1 stop26h 30m

Tue 22/913:45 -

1 stop19h 00m

Deal found 14/8£678

Find flight deals from Cardiff to San Francisco

Round-trip from	£609
One-way from	£369

KLM
28/9-5/10
2 total stops
69h 30m total
Cardiff to San Francisco

Search Deals

WestJet
25/8
3 total stops
42h 20m total
Cardiff to San Francisco

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Tue 29/9

09:45-11:45

1 stop34h 00m

San Francisco

Tue 6/10

13:45-09:15

1 stop35h 30m

£611

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Tue 29/9

17:15-11:45

1 stop26h 30m

San Francisco

Tue 6/10

14:15-16:45

2 stops18h 30m

£611

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Tue 29/9

09:45-23:51

2 stops22h 06m

San Francisco

Tue 6/10

14:15-16:45

2 stops18h 30m

£626

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Wed 16/9

09:45-21:49

2 stops20h 04m

San Francisco

Tue 22/9

06:00-09:15

2 stops19h 15m

£637

Fastest return journey

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Sat 5/9

09:45-22:33

2 stops20h 48m

San Francisco

Fri 11/9

07:00-09:15

2 stops18h 15m

£671

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Wed 16/9

17:15-11:45

1 stop26h 30m

San Francisco

Tue 22/9

13:45-16:45

1 stop19h 00m

£678

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Sun 27/9

09:50-00:34

2 stops22h 44m

San Francisco

Sun 4/10

07:00-09:15

2 stops18h 15m

£690

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Wed 16/9

23:50-14:30

2 stops22h 40m

San Francisco

Tue 22/9

06:00-23:25

3 stops33h 25m

£814

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 28/9

12:00-10:18

3 stops30h 18m

San Francisco

Mon 5/10

21:56-11:30

3 stops29h 34m

£914

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Sun 27/9

17:15-11:45

1 stop26h 30m

San Francisco

Sun 4/10

13:45-16:45

1 stop19h 00m

£931

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 14 resultsSorted by cheapest first

Best time to book a flight from Cardiff to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Cardiff with our price prediction graph.

CWL-SFO

Estimated return 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.

Related info for your journey

How long is the flight from Cardiff to San Francisco?
There are many flights that can get you from Cardiff to San Francisco in 20h 04m. Fly via KLM, Air France, or Delta to get the fastest option. There are 5267 mi between Cardiff and San Francisco. Both multi-stop and direct flights can be found to your destination and back.
Can I find deals for flights from Cardiff to San Francisco that include hotel bookings?
Yes. In addition to deals on Cardiff to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Cardiff to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to San Francisco.
Can I find deals for business class flights from Cardiff to San Francisco?
Yes. Cheapflights offers flight deals from Cardiff to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Santa Cruz

San Bruno

Roseville

Newark

Bodega Bay

Sunnyvale

South San Francisco

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to California

Flights by cabin class

Other flight options

Other flights from Cardiff

Popular flights

San Francisco flight routes

Alternative routes for Cardiff to San Francisco

Fly with Cheapflights

How does Cheapflights help users find flights from Cardiff to San Francisco?

Cheapflights makes it easy to find Cardiff to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Cardiff to San Francisco?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from Cardiff.

Can Cheapflights find flights from Cardiff to San Francisco with no change fees?

Certainly. Search results for flights to San Francisco from Cardiff shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Cardiff to San Francisco become cheaper?

Yes, Cheapflights offers price alerts on Cardiff to San Francisco flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.

Cheap flights from Cardiff to San Francisco from £369

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Cardiff to San Francisco

Cheapest flights from Cardiff to San FranciscoExplore the most affordable flight options available from Cardiff to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Explore the most affordable flight options available from Cardiff to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Best flights from Cardiff to San FranciscoDiscover carefully curated flight deals from Cardiff to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 August 2026.

Discover carefully curated flight deals from Cardiff to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 August 2026.

Last-minute flights from Cardiff to San FranciscoDiscover last-minute flight deals from Cardiff to San Francisco. Data last updated 17 August 2026 and is based on user searches.

Discover last-minute flight deals from Cardiff to San Francisco. Data last updated 17 August 2026 and is based on user searches.

One-way flights from Cardiff to San FranciscoSearch for one-way flight options from Cardiff to San Francisco. Find affordable one-way fares based on user searches. Data last updated 17 August 2026.

Search for one-way flight options from Cardiff to San Francisco. Find affordable one-way fares based on user searches. Data last updated 17 August 2026.

Find flight deals from Cardiff to San Francisco

Round-trip from

One-way from

Cheapflights Fare Finder

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

Best time to book a flight from Cardiff to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Cardiff with our price prediction graph.

Related info for your journey

How long is the flight from Cardiff to San Francisco?

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

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

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

Travelling to a place near San Francisco?

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 Cardiff to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to San Francisco by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to California

Book a non-stop flight to one of these other cities located in California.

Search flights from Cardiff to San Francisco by cabin class

Find flights from Cardiff to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Cardiff and San Francisco flights

Browse other Cardiff and San Francisco flight options. Last updated on 17 August 2026.

Other flights from Cardiff

Browse through other flights departing from Cardiff. Flights are based on user searches made on Cheapflights and were last updated on 17 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Other flights to San Francisco

Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 17 August 2026.

Fly with Cheapflights

How does Cheapflights help users find flights from Cardiff to San Francisco?

Why should you use Cheapflights to find cheap flight tickets from Cardiff to San Francisco?

Can Cheapflights find flights from Cardiff to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from Cardiff to San Francisco become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Cardiff to San Francisco
Explore the most affordable flight options available from Cardiff to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Best flights from Cardiff to San Francisco
Discover carefully curated flight deals from Cardiff to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 August 2026.

Last-minute flights from Cardiff to San Francisco
Discover last-minute flight deals from Cardiff to San Francisco. Data last updated 17 August 2026 and is based on user searches.

One-way flights from Cardiff to San Francisco
Search for one-way flight options from Cardiff to San Francisco. Find affordable one-way fares based on user searches. Data last updated 17 August 2026.