How do I get Price Alerts for flights from Cardiff to San Francisco?

Confirm your travel details to search for the latest offers for flights from Cardiff to San Francisco . While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

How can I save money on flights from Cardiff to San Francisco with momondo?

By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

When did momondo last update prices for flights from Cardiff Wales Airport to San Francisco Airport?

Prices for flights from Cardiff Wales Airport to San Francisco Airport refresh daily.

How old do you have to be to fly from Cardiff Wales Airport to San Francisco Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cardiff Wales Airport to San Francisco Airport.

What documentation or ID do you need to fly to San Francisco Airport?

The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£419 Cheap Flights from Cardiff to San Francisco in 2026

Find the cheapest flights from Cardiff to San Francisco

Return

One-way

Cheap return flights

Enter your travel dates to find the best prices.

17:15 - 11:45CWL Cardiff Wales-SFO San Francisco

26h 30m1 stop Amsterdam Schiphol

22:35 - 09:15SFO San Francisco-CWL Cardiff Wales

26h 40m2 stops New York John F Kennedy Intl Amsterdam Schiphol

£609KLM

Mon, 14 Sep - Mon, 21 Sep

17:15 - 11:45CWL Cardiff Wales-SFO San Francisco

26h 30m1 stop Amsterdam Schiphol

07:00 - 09:15SFO San Francisco-CWL Cardiff Wales

18h 15m2 stops New York John F Kennedy Intl Amsterdam Schiphol

£609KLM

Mon, 14 Sep - Mon, 21 Sep

17:15 - 11:45CWL Cardiff Wales-SFO San Francisco

26h 30m1 stop Amsterdam Schiphol

13:45 - 09:15SFO San Francisco-CWL Cardiff Wales

35h 30m1 stop Amsterdam Schiphol

£617Multiple Airlines

Mon, 14 Sep - Mon, 21 Sep

17:15 - 11:45CWL Cardiff Wales-SFO San Francisco

26h 30m1 stop Amsterdam Schiphol

14:15 - 16:45SFO San Francisco-CWL Cardiff Wales

18h 30m2 stops Seattle/Tacoma Intl Amsterdam Schiphol

£631Air France

Mon, 7 Sep - Sun, 20 Sep

09:45 - 11:45CWL Cardiff Wales-SFO San Francisco

34h 00m1 stop Amsterdam Schiphol

14:15 - 16:45SFO San Francisco-CWL Cardiff Wales

18h 30m2 stops Seattle/Tacoma Intl Amsterdam Schiphol

£637Air France

Thu, 17 Sep - Wed, 7 Oct

17:15 - 11:45CWL Cardiff Wales-SFO San Francisco

26h 30m1 stop Amsterdam Schiphol

13:45 - 09:15SFO San Francisco-CWL Cardiff Wales

35h 30m1 stop Amsterdam Schiphol

£639Multiple Airlines

Mon, 14 Sep - Mon, 21 Sep

09:45 - 11:45CWL Cardiff Wales-SFO San Francisco

34h 00m1 stop Amsterdam Schiphol

13:45 - 16:45SFO San Francisco-CWL Cardiff Wales

19h 00m1 stop Amsterdam Schiphol

£639Air France

Thu, 17 Sep - Wed, 7 Oct

09:45 - 00:22CWL Cardiff Wales-SFO San Francisco

22h 37m2 stops Amsterdam Schiphol Boston Logan Intl

14:20 - 16:45SFO San Francisco-CWL Cardiff Wales

18h 25m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

£640Delta

Mon, 14 Sep - Mon, 21 Sep

09:45 - 00:34CWL Cardiff Wales-SFO San Francisco

22h 49m2 stops Amsterdam Schiphol New York John F Kennedy Intl

09:59 - 16:45SFO San Francisco-CWL Cardiff Wales

22h 46m2 stops Austin Bergstrom Amsterdam Schiphol

£640Delta

Mon, 14 Sep - Mon, 21 Sep

17:15 - 11:45CWL Cardiff Wales-SFO San Francisco

26h 30m1 stop Amsterdam Schiphol

14:15 - 16:45SFO San Francisco-CWL Cardiff Wales

18h 30m2 stops Seattle/Tacoma Intl Amsterdam Schiphol

£640Air France

Mon, 14 Sep - Mon, 21 Sep

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Air France flights from Cardiff to San Francisco

Our best Air France deals on Cardiff to San Francisco flight tickets

Air France

7 Sept

CWL17:15Cardiff Wales

26h 30m

1 stop

SFO11:45San Francisco

20 Sept

SFO14:15San Francisco

18h 30m

2 stops

CWL16:45Cardiff Wales

£631

Air France

17 Sept

CWL09:45Cardiff Wales

34h 00m

1 stop

SFO11:45San Francisco

7 Oct

SFO14:15San Francisco

18h 30m

2 stops

CWL16:45Cardiff Wales

£637

Air France

23 Sept

CWL17:15Cardiff Wales

26h 30m

1 stop

SFO11:45San Francisco

6 Oct

SFO13:45San Francisco

19h 00m

1 stop

CWL16:45Cardiff Wales

£3,481

KLM flights from Cardiff to San Francisco

Our best KLM deals on Cardiff to San Francisco flight tickets

KLM

14 Sept

CWL17:15Cardiff Wales

26h 30m

1 stop

SFO11:45San Francisco

21 Sept

SFO22:35San Francisco

26h 40m

2 stops

CWL09:15Cardiff Wales

£609

KLM

17 Sept

CWL09:45Cardiff Wales

18h 33m

2 stops

SFO20:18San Francisco

7 Oct

SFO07:00San Francisco

18h 15m

2 stops

CWL09:15Cardiff Wales

£641

KLM

14 Sept

CWL17:15Cardiff Wales

26h 30m

1 stop

SFO11:45San Francisco

21 Sept

SFO13:45San Francisco

19h 00m

1 stop

CWL16:45Cardiff Wales

£657

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 14/9

17:15-11:45

1 stop26h 30m

San Francisco

Mon 21/9

22:35-09:15

2 stops26h 40m

£609

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 14/9

17:15-11:45

1 stop26h 30m

San Francisco

Mon 21/9

07:00-09:15

2 stops18h 15m

£609

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 14/9

17:15-11:45

1 stop26h 30m

San Francisco

Mon 21/9

13:45-09:15

1 stop35h 30m

£617

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 7/9

17:15-11:45

1 stop26h 30m

San Francisco

Sun 20/9

14:15-16:45

2 stops18h 30m

£631

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Thu 17/9

09:45-11:45

1 stop34h 00m

San Francisco

Wed 7/10

14:15-16:45

2 stops18h 30m

£637

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 14/9

17:15-11:45

1 stop26h 30m

San Francisco

Mon 21/9

13:45-09:15

1 stop35h 30m

£639

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Thu 17/9

09:45-11:45

1 stop34h 00m

San Francisco

Wed 7/10

13:45-16:45

1 stop19h 00m

£639

Fastest return journey

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 14/9

09:45-00:22

2 stops22h 37m

San Francisco

Mon 21/9

14:20-16:45

2 stops18h 25m

£640

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 14/9

09:45-00:34

2 stops22h 49m

San Francisco

Mon 21/9

09:59-16:45

2 stops22h 46m

£640

CardiffSan Francisco

CWL Cardiff Wales - SFO San Francisco

CWLSFO

Cardiff Wales

Mon 14/9

17:15-11:45

1 stop26h 30m

San Francisco

Mon 21/9

14:15-16:45

2 stops18h 30m

£640

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

When to book flights from Cardiff to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from Cardiff to San Francisco according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Cardiff to San Francisco (CWL to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cardiff to San Francisco

Fastest flight time	26h 30m
Direct flights	None

The fastest flight from Cardiff to San Francisco takes 26h 30m

There are no direct flights from Cardiff to San Francisco. There are no popular flight routes from Cardiff to San Francisco.

Search flight deals

Frequently asked questions about flying from Cardiff to San Francisco

How far is Cardiff Wales to San Francisco by plane?
The straight-line distance from Cardiff Wales to San Francisco is 5259.3 mi. Flights usually cover this in 26h 30m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Cardiff Wales Airport to San Francisco Airport?
Prices for flights from Cardiff Wales Airport to San Francisco Airport refresh daily.
How old do you have to be to fly from Cardiff Wales Airport to San Francisco Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cardiff Wales Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Cardiff to San Francisco

How do I get Price Alerts for flights from Cardiff to San Francisco?
Confirm your travel details to search for the latest offers for flights from Cardiff to San Francisco. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.
How can I save money on flights from Cardiff to San Francisco with momondo?
By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

South San Francisco

Santa Cruz

Sunnyvale

Rohnert Park

Carmel-by-the-Sea

Windsor

Burlingame

Belmont

Big Sur

Sausalito

San Bruno

Pacific Grove

Aptos

Newark

Mill Valley

Campbell

Palo Alto

Seaside

Roseville

Novato

Why use momondo?

Why should I use momondo to find a flight deal from Cardiff to San Francisco?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Cardiff to San Francisco for you.

Can I find flights from Cardiff to San Francisco with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Francisco from Cardiff which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Cardiff to San Francisco?

momondo helps you find the best flight between Cardiff and San Francisco by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Cardiff to San Francisco right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Francisco, momondo offers a useful price alert feature which will track prices for flights to San Francisco from Cardiff and alert you when they change.