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Cheap flights from Cardiff to San Francisco from £516

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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — SFO
19 Mar — 26 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to San Francisco

Enter your travel dates to find the best prices.

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 February 2026.

Sun 8/310:20
CWL
-
SFO
1 stop33h 30m
KLM
Tue 17/307:00
SFO
-
CWL
2 stops19h 50m
KLM
Deal found 15/2£619
Tue 31/317:15
CWL
-
SFO
1 stop26h 30m
KLM
Tue 7/413:05
SFO
-
CWL
2 stops19h 40m
KLM
Deal found 14/2£641
Tue 31/317:15
CWL
-
SFO
2 stops33h 04m
Virgin Atlantic
Tue 7/405:50
SFO
-
CWL
2 stops26h 55m
Virgin Atlantic
Deal found 14/2£645
Wed 1/423:50
CWL
-
SFO
2 stops46h 50m
Multiple Airlines
Wed 8/417:40
SFO
-
CWL
1 stop20h 45m
Multiple Airlines
Deal found 15/2£780
Wed 1/409:45
CWL
-
SFO
2 stops22h 12m
Delta
Wed 8/405:50
SFO
-
CWL
2 stops19h 25m
Delta
Deal found 15/2£819
Thu 2/409:45
CWL
-
SFO
2 stops22h 50m
Air France
Thu 9/413:45
SFO
-
CWL
1 stop19h 00m
Air France
Deal found 16/2£848
Thu 2/422:50
CWL
-
SFO
1 stop25h 00m
Multiple Airlines
Thu 9/417:35
SFO
-
CWL
1 stop20h 45m
Multiple Airlines
Deal found 16/2£905
Sun 8/321:20
CWL
-
SFO
2 stops25h 15m
Multiple Airlines
Tue 17/315:40
SFO
-
CWL
3 stops35h 10m
Multiple Airlines
Deal found 15/2£1,054

Find flight deals from Cardiff to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 February 2026.

Round-trip from

£619

One-way from

£516
KLM
  • KLM
  • 8/3-17/3
  • 2 total stops
  • 45h 20m total
  • Cardiff to San Francisco
Search Deals
3/7
  • 3/7
  • 2 total stops
  • 34h 00m total
  • Cardiff to San Francisco
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to San Francisco 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 858,174 searches. Data last updated 17 February 2026.
Use the filters below to find and compare flights from Cardiff to San Francisco that are best for you.

Fly from

Cardiff

Fly to

San Francisco

Route

Depart

Return

Price

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 8/3

17:30-12:50

1 stop26h 20m

San Francisco

Tue 17/3

14:55-16:55

1 stop19h 00m

£619

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 31/3

17:15-11:45

1 stop26h 30m

San Francisco

Tue 7/4

13:05-16:45

2 stops19h 40m

£641

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 31/3

17:15-18:19

2 stops33h 04m

San Francisco

Tue 7/4

05:50-16:45

2 stops26h 55m

£645

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 1/4

23:50-14:40

2 stops46h 50m

San Francisco

Wed 8/4

17:40-22:25

1 stop20h 45m

£780

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 1/4

09:45-23:57

2 stops22h 12m

San Francisco

Wed 8/4

05:50-09:15

2 stops19h 25m

£819

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 1/4

09:45-20:59

2 stops19h 14m

San Francisco

Wed 8/4

06:20-09:15

2 stops18h 55m

£819

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 2/4

09:45-00:35

2 stops22h 50m

San Francisco

Thu 9/4

13:45-16:45

1 stop19h 00m

£848

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 2/4

09:45-00:35

2 stops22h 50m

San Francisco

Thu 9/4

07:00-09:15

2 stops18h 15m

£848

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 3/7

15:35-17:35

2 stops34h 00m

£516

Flights are sorted by cheapest return flights first.

Deals found on 14/2

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.
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.

Cheapflights Insights

Everything you need to know about your flight from Cardiff to San Francisco

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

Currently, February is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of £416). Flying from Cardiff to San Francisco in June is currently the most expensive (average of £703). 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.

Related info for your journey

Find useful and relevant information for your journey from Cardiff to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    There are many flights that can get you from Cardiff to San Francisco in 26h 20m. Fly via KLM or Virgin Atlantic 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.

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

    Currently, February is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of £416). Flying from Cardiff to San Francisco in June is currently the most expensive (average of £703). 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

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale
Pacific Grove

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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.

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