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Cheap flights from Cardiff to San Francisco Bay Area from £540

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 14/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — SFO
17 Apr — 24 Apr1
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.

Cheapest flights from Cardiff to San Francisco Bay Area
Explore the most affordable flight options available from Cardiff to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 March 2026.

Tue 14/417:15
CWL
-
SFO
1 stop26h 30m
Multiple Airlines
Tue 21/413:45
SFO
-
CWL
1 stop35h 30m
Multiple Airlines
Deal found 15/3£626
Tue 28/417:15
CWL
-
SFO
1 stop26h 30m
Multiple Airlines
Tue 5/513:45
SFO
-
CWL
1 stop35h 30m
Multiple Airlines
Deal found 14/3£628
Wed 29/409:45
CWL
-
SFO
2 stops21h 33m
Air France
Wed 6/513:45
SFO
-
CWL
1 stop19h 00m
Air France
Deal found 15/3£632
Tue 14/409:45
CWL
-
SFO
2 stops21h 27m
KLM
Tue 21/407:25
SFO
-
CWL
2 stops17h 50m
KLM
Deal found 15/3£635
Wed 29/409:45
CWL
-
SFO
2 stops22h 42m
Delta
Wed 6/506:20
SFO
-
CWL
2 stops18h 55m
Delta
Deal found 15/3£648
Tue 28/417:15
CWL
-
SFO
2 stops34h 05m
Virgin Atlantic
Tue 5/506:00
SFO
-
CWL
2 stops19h 15m
Virgin Atlantic
Deal found 14/3£652
Thu 30/417:15
CWL
-
SFO
1 stop26h 30m
KLM
Thu 7/513:45
SFO
-
CWL
1 stop35h 30m
KLM
Deal found 16/3£656
Thu 30/409:45
CWL
-
SFO
2 stops21h 33m
Multiple Airlines
Thu 7/513:45
SFO
-
CWL
1 stop35h 30m
Multiple Airlines
Deal found 16/3£662
Fri 1/509:45
CWL
-
SJC
2 stops18h 52m
KLM
Fri 8/507:10
SJC
-
CWL
2 stops25h 55m
KLM
Deal found 17/3£711
Fri 1/517:15
CWL
-
SJC
3 stops35h 33m
Multiple Airlines
Fri 8/509:53
SJC
-
CWL
2 stops23h 12m
Multiple Airlines
Deal found 17/3£1,974

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 18 March 2026.

Round-trip from

£626

One-way from

£540
KLM
  • KLM
  • 14/4-21/4
  • 2 total stops
  • 62h 00m total
  • Cardiff to San Francisco Bay Area
Search Deals
WestJet
  • WestJet
  • 14/7
  • 2 total stops
  • 42h 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 18 March 2026.
Use the filters below to find and compare flights from Cardiff to San Francisco Bay Area that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 14/4

17:15-11:45

1 stop26h 30m

San Francisco

Tue 21/4

13:45-09:15

1 stop35h 30m

£626

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 28/4

17:15-11:45

1 stop26h 30m

San Francisco

Tue 5/5

13:45-09:15

1 stop35h 30m

£628
Fastest return journey

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 29/4

09:45-23:18

2 stops21h 33m

San Francisco

Wed 6/5

06:20-09:15

2 stops18h 55m

£635

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 14/4

09:45-11:45

1 stop34h 00m

San Francisco

Tue 21/4

13:45-09:15

1 stop35h 30m

£644

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 29/4

09:45-00:27

2 stops22h 42m

San Francisco

Wed 6/5

13:45-16:45

1 stop19h 00m

£648

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 30/4

17:15-11:45

1 stop26h 30m

San Francisco

Thu 7/5

13:45-09:15

1 stop35h 30m

£656

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 29/4

09:45-11:45

1 stop34h 00m

San Francisco

Wed 6/5

13:45-09:15

1 stop35h 30m

£682

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sat 2/5

09:45-11:45

1 stop34h 00m

San Francisco

Sat 9/5

07:00-09:15

2 stops18h 15m

£698

CardiffSan Jose

CWL - SJC

CWLSJC

Cardiff Wales

Fri 1/5

09:45-20:37

2 stops18h 52m

San Jose

Fri 8/5

07:10-17:05

2 stops25h 55m

£711

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sat 2/5

09:45-23:12

2 stops21h 27m

San Francisco

Sat 9/5

08:30-16:45

2 stops24h 15m

£713

Flights are sorted by cheapest return flights first.

Deals found on 17/3

Showing 1-10 of 13 resultsSorted by cheapest first
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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 £413). Flying from Cardiff to San Francisco Bay Area in June is currently the most expensive (average of £752). 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 £648, KLM can have you in San Francisco Bay Area from Cardiff in 22h 42m. 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 £413). Flying from Cardiff to San Francisco Bay Area in June is currently the most expensive (average of £752). 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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Why should you use Cheapflights to find cheap flight tickets from Cardiff to San Francisco Bay Area?

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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.

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