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Cheap flights from Cardiff to San Francisco from £542

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 25/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — SFO
4 May — 11 May1
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 4 April 2026.

Mon 18/517:15
CWL
-
SFO
1 stop26h 30m
KLM
Mon 25/513:45
SFO
-
CWL
1 stop19h 00m
KLM
Deal found 3/4£721
Mon 18/517:15
CWL
-
SFO
1 stop26h 30m
Air France
Mon 25/515:05
SFO
-
CWL
2 stops17h 40m
Air France
Deal found 3/4£742
Sun 17/517:15
CWL
-
SFO
2 stops34h 05m
KLM
Sun 24/517:55
SFO
-
CWL
2 stops38h 50m
KLM
Deal found 2/4£753
Tue 7/415:00
CWL
-
SFO
2 stops57h 25m
Multiple Airlines
Tue 14/416:35
SFO
-
CWL
2 stops39h 05m
Multiple Airlines
Deal found 2/4£769
Sun 17/521:45
CWL
-
SFO
3 stops45h 40m
Multiple Airlines
Sun 24/519:30
SFO
-
CWL
3 stops30h 45m
Multiple Airlines
Deal found 2/4£815
Mon 18/517:15
CWL
-
SFO
2 stops30h 43m
Virgin Atlantic
Mon 25/520:30
SFO
-
CWL
2 stops36h 15m
Virgin Atlantic
Deal found 3/4£817
Mon 18/513:35
CWL
-
SFO
2 stops30h 10m
Multiple Airlines
Mon 25/515:05
SFO
-
CWL
3 stops34h 10m
Multiple Airlines
Deal found 3/4£834
Fri 15/509:45
CWL
-
SFO
2 stops21h 03m
Multiple Airlines
Fri 22/513:45
SFO
-
CWL
1 stop35h 30m
Multiple Airlines
Deal found 31/3£848
Fri 15/517:15
CWL
-
SFO
1 stop26h 30m
Virgin Atlantic
Fri 22/513:45
SFO
-
CWL
1 stop35h 30m
Virgin Atlantic
Deal found 31/3£867

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 4 April 2026.

Round-trip from

£721

One-way from

£542
KLM
  • KLM
  • 18/5-25/5
  • 2 total stops
  • 45h 30m total
  • Cardiff to San Francisco
Search Deals
WestJet
  • WestJet
  • 25/7
  • 2 total stops
  • 56h 25m 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 4 April 2026.
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 - SFO

CWLSFO

Cardiff Wales

Mon 18/5

17:15-11:45

1 stop26h 30m

San Francisco

Mon 25/5

13:45-16:45

1 stop19h 00m

£721
Fastest return journey

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Mon 18/5

17:15-11:45

1 stop26h 30m

San Francisco

Mon 25/5

15:05-16:45

2 stops17h 40m

£742

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 17/5

17:15-19:20

2 stops34h 05m

San Francisco

Sun 24/5

17:55-16:45

2 stops38h 50m

£753

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 17/5

21:45-11:25

3 stops45h 40m

San Francisco

Sun 24/5

19:30-10:15

3 stops30h 45m

£815

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Mon 18/5

17:15-15:58

2 stops30h 43m

San Francisco

Mon 25/5

20:30-16:45

2 stops36h 15m

£817

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Mon 18/5

13:35-11:45

2 stops30h 10m

San Francisco

Mon 25/5

15:05-09:15

3 stops34h 10m

£834

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 15/5

09:45-22:48

2 stops21h 03m

San Francisco

Fri 22/5

13:45-09:15

1 stop35h 30m

£848

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 15/5

17:15-11:45

1 stop26h 30m

San Francisco

Fri 22/5

13:45-09:15

1 stop35h 30m

£867

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 3/9

11:35-16:40

2 stops61h 05m

San Francisco

Mon 7/9

18:05-10:15

2 stops56h 10m

£938
Cheapest one-way
Fastest single journey

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sat 25/7

11:35-12:00

2 stops56h 25m

£542

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Sorted 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.
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, April is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of £169). Flying from Cardiff to San Francisco in June is currently the most expensive (average of £758). 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 30m. Fly via KLM or Air France to get the fastest option. There are 5267 mi between Cardiff and San Francisco.

  • 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, April is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of £169). Flying from Cardiff to San Francisco in June is currently the most expensive (average of £758). 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

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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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