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$716+ Cheap flights from Cardiff (CWL) to San Francisco (SFO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — SFO
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Cardiff to San Francisco

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 January 29, 2026.

This KLM deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/115:25 pm
CWL
-
SFO
1 stop26h 25m
KLM
Wed 3/189:15 am
SFO
-
CWL
2 stops17h 35m
KLM
Deal found 1/27$716
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1310:25 pm
CWL
-
SFO
2 stops45h 17m
Multiple Airlines
Fri 3/206:20 pm
SFO
-
CWL
1 stop18h 20m
Multiple Airlines
Deal found 1/29$947
This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1410:20 am
CWL
-
SFO
1 stop33h 30m
Multiple Airlines
Sat 3/215:50 am
SFO
-
CWL
2 stops21h 00m
Multiple Airlines
Deal found 1/28$966
This Expedia deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1310:20 am
CWL
-
SFO
1 stop33h 30m
KLM
Fri 3/202:55 pm
SFO
-
CWL
1 stop19h 00m
KLM
Deal found 1/29$992
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1310:20 am
CWL
-
SFO
2 stops19h 16m
Delta
Fri 3/207:00 am
SFO
-
CWL
2 stops19h 50m
Delta
Deal found 1/29$1,059
This KLM deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/145:25 pm
CWL
-
SFO
1 stop26h 25m
KLM
Sat 3/212:55 pm
SFO
-
CWL
1 stop18h 55m
KLM
Deal found 1/28$1,113
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1410:20 am
CWL
-
SFO
2 stops19h 55m
Delta
Sat 3/217:00 am
SFO
-
CWL
2 stops19h 50m
Delta
Deal found 1/28$1,153

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$716
(KLM)
Provider with most accurate pricing for Cardiff Wales-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Cardiff Wales-San Francisco flights.
Search Deals
From Cardiff Wales to San Francisco
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Cardiff to San Francisco that are best for you.

Fly from

Cardiff

Fly to

San Francisco

Route

Depart

Return

Price

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 3/11

5:25 pm-12:50 pm

1 stop26h 25m

San Francisco

Wed 3/18

9:15 am-9:50 am

2 stops17h 35m

$716

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 3/13

10:25 pm-12:42 pm

2 stops45h 17m

San Francisco

Fri 3/20

6:20 pm-7:40 pm

1 stop18h 20m

$947

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sat 3/14

10:20 am-12:50 pm

1 stop33h 30m

San Francisco

Sat 3/21

5:50 am-9:50 am

2 stops21h 00m

$966

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 3/13

10:20 am-12:50 pm

1 stop33h 30m

San Francisco

Fri 3/20

2:55 pm-4:55 pm

1 stop19h 00m

$992

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 3/13

10:20 am-10:36 pm

2 stops19h 16m

San Francisco

Fri 3/20

7:00 am-9:50 am

2 stops19h 50m

$1,059

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sat 3/14

5:25 pm-12:50 pm

1 stop26h 25m

San Francisco

Sat 3/21

2:55 pm-4:50 pm

1 stop18h 55m

$1,113

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sat 3/14

10:20 am-11:15 pm

2 stops19h 55m

San Francisco

Sat 3/21

7:00 am-9:50 am

2 stops19h 50m

$1,153

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

  • Most accurate provider: When it comes to deals on Cardiff-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Cardiff-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Cardiff-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Cardiff-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Cardiff-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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, February is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of $566). Flying from Cardiff to San Francisco in June is currently the most expensive (average of $959). 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?

    A quick flight from Cardiff to San Francisco can take about 26h 25m. KLM provides one of the quickest options available for as low as $716. The distance from Cardiff to San Francisco is about 5267 mi.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of $566). Flying from Cardiff to San Francisco in June is currently the most expensive (average of $959). 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

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
South San Francisco
Santa Cruz
Roseville
Santa Clara
Livermore
Watsonville
San Bruno
Daly City
Sunnyvale
Turlock
Vacaville
San Carlos
San Ramon
Manteca
Vallejo
San Lorenzo
Davis
Hollister
Redwood City
Union City

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