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Cheap flights from Cardiff to San Francisco Bay Area from £525

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — SFO
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to San Francisco Bay Area

Enter your travel dates to find the best prices.

Best flights from Cardiff to San Francisco Bay Area
Discover carefully curated flight deals from Cardiff to San Francisco Bay Area that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 December 2025.

Wed 4/210:20CWL - SFO
1 stop33h 30mKLM
Wed 11/214:05SFO - CWL
2 stops18h 50mKLM
Deal found 21/12£525
Tue 3/210:20CWL - SFO
2 stops21h 05mDelta
Tue 10/213:55SFO - CWL
1 stop19h 00mDelta
Deal found 20/12£528
Wed 4/210:20CWL - SFO
3 stops32h 34mMultiple Airlines
Wed 11/208:30SFO - CWL
3 stops24h 25mMultiple Airlines
Deal found 21/12£904
Tue 3/210:20CWL - SFO
1 stop33h 30mKLM
Tue 10/213:55SFO - CWL
1 stop19h 00mKLM
Deal found 20/12£525
Sun 11/110:15CWL - SFO
2 stops22h 53mDelta
Sun 18/113:55SFO - CWL
1 stop18h 50mDelta
Deal found 21/12£735
Tue 3/217:25CWL - SFO
2 stops35h 09mMultiple Airlines
Tue 10/207:30SFO - CWL
3 stops25h 25mMultiple Airlines
Deal found 20/12£1,026

Find flight deals from Cardiff to San Francisco Bay Area

Keep the following information in mind while searching for Cardiff to San Francisco Bay Area flight deals. Data was last updated 21 December 2025.

Round-trip from

£525
KLM
  • KLM
  • 4/2-11/2
  • 3 total stops
  • 52h 20m total
  • Cardiff to San Francisco Bay Area
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to San Francisco Bay Area 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 21 December 2025.
Use the filters below to find and compare flights from Cardiff to San Francisco Bay Area that are best for you.

Fly from

Cardiff

Fly to

San Francisco Bay Area

Route

Depart

Return

Price

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 4/2

10:20-11:50

1 stop33h 30m

San Francisco

Wed 11/2

14:05-16:55

2 stops18h 50m

£525

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 3/2

10:20-11:50

1 stop33h 30m

San Francisco

Tue 10/2

13:55-16:55

1 stop19h 00m

£525

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 3/2

10:20-23:25

2 stops21h 05m

San Francisco

Tue 10/2

13:55-16:55

1 stop19h 00m

£528

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 11/1

10:15-01:08

2 stops22h 53m

San Francisco

Sun 18/1

13:55-16:45

1 stop18h 50m

£735

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 4/2

10:20-10:54

3 stops32h 34m

San Francisco

Wed 11/2

08:30-16:55

3 stops24h 25m

£904

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 3/2

17:25-20:34

2 stops35h 09m

San Francisco

Tue 10/2

07:30-16:55

3 stops25h 25m

£1,026

Flights are sorted by cheapest return flights first.

Deals found on 21/12

Best time to book a flight from Cardiff to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area 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 Bay Area

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

Currently, February is the cheapest month in which you can book a flight from Cardiff to San Francisco Bay Area (average of £427). Flying from Cardiff to San Francisco Bay Area in June is currently the most expensive (average of £717). 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 Bay Area. 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 Cardiff to San Francisco Bay Area?

    For a flight from Cardiff to San Francisco Bay Area, you will be flying from Cardiff Wales. Cardiff Wales (CWL) is just 9.1 mi from the center of the city.

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

    For as low as £528, KLM can have you in San Francisco Bay Area from Cardiff in 21h 05m. There are 5267 mi between Cardiff and San Francisco Bay Area. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from Cardiff to San Francisco Bay Area?

    Most travelers choose Cardiff Wales - San Francisco, Cardiff Wales - Oakland or Cardiff Wales - San Jose when deciding on the best route from Cardiff to San Francisco Bay Area.

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

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

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

    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 Bay Area.

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

    Yes. Cheapflights offers flight deals from Cardiff to San Francisco Bay Area 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 Bay Area?

    Currently, February is the cheapest month in which you can book a flight from Cardiff to San Francisco Bay Area (average of £427). Flying from Cardiff to San Francisco Bay Area in June is currently the most expensive (average of £717). 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

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Cardiff to San Francisco Bay Area 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 Bay Area?

Cheapflights simply makes it quick and affordable to book flights from Cardiff to San Francisco Bay Area by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Cardiff to San Francisco Bay Area, users can toggle the no change fees filter when performing a flight search.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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