Which airlines fly to San Francisco?

KLM, Virgin Atlantic and Aer Lingus are the top three most popular airlines that fly to San Francisco from Cardiff according to our data. KLM is the first choice among our users, with 61% of people opting to fly with this airline when travelling to San Francisco. Keep in mind that there are 4 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

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 many operators does momondo search for flights from Cardiff Wales Airport to San Francisco Airport?

There is 1 operator available for flights from Cardiff Wales Airport to San Francisco Airport as of August 2025.

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.

£529 Cheap Flights from Cardiff to San Francisco (CWL-SFO) in 2025

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Find the cheapest flights from Cardiff to San Francisco (CWL-SFO)

Round-trip

One-way

Cheap return flights

17:15 - 11:45CWL-SFO

26h 30m1 stop

06:45 - 09:15SFO-CWL

18h 30m2 stops

£612KLM

Find Deal

Thu, 18 Sep - Thu, 25 Sep

09:50 - 21:27CWL-SFO

19h 37m2 stops

06:45 - 09:15SFO-CWL

18h 30m2 stops

£616KLM

Find Deal

Thu, 18 Sep - Thu, 25 Sep

07:55 - 09:30CWL-SFO

33h 35m3 stops

16:20 - 09:10SFO-CWL

32h 50m3 stops

£891

Find Deal

Thu, 18 Sep - Thu, 25 Sep

07:55 - 09:30CWL-SFO

33h 35m3 stops

17:40 - 19:15SFO-CWL

17h 35m2 stops

£1,025

Find Deal

Thu, 18 Sep - Thu, 25 Sep

09:45 - 21:27CWL-SFO

19h 42m2 stops

13:45 - 16:45SFO-CWL

19h 00m1 stop

£1,428Delta

Find Deal

Sat, 16 Aug - Tue, 19 Aug

KLM flights from Cardiff to San Francisco

Our best KLM deals on Cardiff to San Francisco flight tickets

KLM

18 Sept

CWL17:15Cardiff Wales

26h 30m

1 stop

SFO11:45San Francisco

25 Sept

SFO06:45San Francisco

18h 30m

2 stops

CWL09:15Cardiff Wales

£612

Find similar

KLM

18 Sept

CWL09:50Cardiff Wales

19h 37m

2 stops

SFO21:27San Francisco

25 Sept

SFO06:45San Francisco

18h 30m

2 stops

CWL09:15Cardiff Wales

£616

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 18/9

17:15-11:45

1 stop26h 30m

San Francisco

Thu 25/9

06:45-09:15

2 stops18h 30m

£612

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 18/9

09:50-21:27

2 stops19h 37m

San Francisco

Thu 25/9

06:45-09:15

2 stops18h 30m

£616

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 18/9

07:55-09:30

3 stops33h 35m

San Francisco

Thu 25/9

16:20-09:10

3 stops32h 50m

£891

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Thu 18/9

07:55-09:30

3 stops33h 35m

San Francisco

Thu 25/9

17:40-19:15

2 stops17h 35m

£1,025

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sat 16/8

09:45-21:27

2 stops19h 42m

San Francisco

Tue 19/8

13:45-16:45

1 stop19h 00m

£1,428

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Cardiff to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart on your flight to San Francisco is on a Friday when prices can be found for as low as £677. This is often the case because there is less demand to fly during this day of the week. Flights from Cardiff to San Francisco on a Saturday will generally be more expensive and average around £1,038. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Best price found	£612
Fastest flight time	19h 37m
Direct flights	None
Airports in San Francisco	1 airport

The best flight deal from Cardiff to San Francisco found on momondo in the last 72 hours is £612

The fastest flight from Cardiff to San Francisco takes 19h 37m

There are no direct flights from Cardiff to San Francisco. Popular non-direct route for this connection is Cardiff Wales Airport - San Francisco Airport.

There is 1 airport near San Francisco: San Francisco (SFO)

Search flight deals

How far is Cardiff Wales to San Francisco by plane?
The straight-line distance from Cardiff Wales to San Francisco is 5259.0 mi. Flights usually cover this in 19h 37m, 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 many operators does momondo search for flights from Cardiff Wales Airport to San Francisco Airport?
There is 1 operator available for flights from Cardiff Wales Airport to San Francisco Airport as of August 2025.
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.
What is the most popular airline from Cardiff to San Francisco?
momondo data reveals that the most frequently booked airline on the route from Cardiff to San Francisco is KLM, representing 100% of all bookings.

Best airlines flying from Cardiff to San Francisco

Compare and see reviews for airlines that fly from Cardiff to San Francisco with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom £454	Free Cancellation	Rating 7.8 1,381 reviews		Search KLM flights

Carmel-by-the-Sea

Santa Clara

Seaside

Vacaville

Salinas

Calistoga

Rohnert Park

Campbell

Bodega Bay

Milpitas

San Ramon

South San Francisco

Brentwood

Capitola

Sonoma

San Bruno

Millbrae

Sausalito

Woodland

Santa Cruz

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.