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$660+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — SFO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$660
(KLM)
From Cardiff Wales to San Francisco
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Find 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 September 11, 2025.

This KLM deal was found by Cheapflights users on 9/9. 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.
Tue 10/75:15 pmCWL - SFO
1 stop26h 30mKLM
Tue 10/141:45 pmSFO - CWL
1 stop35h 30mKLM
Deal found 9/9$660
This TravelUp deal was found by Cheapflights users on 9/9. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/75:15 pmCWL - SFO
2 stops36h 37mVirgin Atlantic
Tue 10/1411:25 amSFO - CWL
2 stops37h 50mVirgin Atlantic
Deal found 9/9$661
This Delta deal was found by Cheapflights users on 9/9. 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.
Tue 10/79:50 amCWL - SFO
2 stops17h 40mDelta
Mon 10/1312:35 amSFO - CWL
2 stops24h 40mDelta
Deal found 9/9$696
This KLM deal was found by Cheapflights users on 9/9. 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.
Tue 12/95:25 pmCWL - SFO
1 stop26h 25mKLM
Thu 1/89:00 amSFO - CWL
2 stops16h 50mKLM
Deal found 9/9$716
This TravelUp deal was found by Cheapflights users on 9/11. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:30 pmCWL - SFO
2 stops37h 35mVirgin Atlantic
Sun 11/25:30 pmSFO - CWL
2 stops39h 25mVirgin Atlantic
Deal found 9/11$717
This KLM deal was found by Cheapflights users on 9/9. 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 12/1010:20 amCWL - SFO
2 stops19h 58mKLM
Wed 1/79:00 amSFO - CWL
2 stops16h 50mKLM
Deal found 9/9$721
This Delta deal was found by Cheapflights users on 9/9. 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.
Mon 12/810:20 amCWL - SFO
2 stops19h 58mDelta
Wed 1/79:00 amSFO - CWL
2 stops23h 55mDelta
Deal found 9/9$751
This KLM deal was found by Cheapflights users on 9/11. 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.
Sun 10/265:30 pmCWL - SFO
1 stop26h 20mKLM
Sun 11/21:55 pmSFO - CWL
1 stop18h 50mKLM
Deal found 9/11$771
This Air France deal was found by Cheapflights users on 9/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/810:20 amCWL - SFO
1 stop33h 30mMultiple Airlines
Thu 1/81:55 pmSFO - CWL
1 stop18h 50mMultiple Airlines
Deal found 9/9$858
This Air France deal was found by Cheapflights users on 9/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/810:20 amCWL - SFO
1 stop33h 30mMultiple Airlines
Fri 1/91:55 pmSFO - CWL
1 stop19h 00mMultiple Airlines
Deal found 9/9$898
This Mytrip deal was found by Cheapflights users on 9/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/78:20 pmCWL - SFO
2 stops26h 15mMultiple Airlines
Tue 10/1412:50 pmSFO - CWL
3 stops36h 25mMultiple Airlines
Deal found 9/9$928

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 September 11, 2025.
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

Tue 10/7

5:15 pm-11:45 am

1 stop26h 30m

San Francisco

Tue 10/14

1:45 pm-9:15 am

1 stop35h 30m

$660

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 10/7

5:15 pm-9:52 pm

2 stops36h 37m

San Francisco

Tue 10/14

11:25 am-9:15 am

2 stops37h 50m

$661

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 10/7

9:50 am-7:30 pm

2 stops17h 40m

San Francisco

Mon 10/13

12:35 am-9:15 am

2 stops24h 40m

$696

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 3/6

5:25 pm-11:50 am

1 stop26h 25m

San Francisco

Tue 3/10

2:55 pm-4:55 pm

1 stop19h 00m

$709

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Fri 3/6

10:20 am-10:47 pm

2 stops20h 27m

San Francisco

Mon 3/9

12:40 am-4:55 pm

2 stops33h 15m

$715

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Mon 12/8

10:20 am-11:50 am

1 stop33h 30m

San Francisco

Thu 1/8

9:00 am-9:50 am

2 stops16h 50m

$716

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Mon 12/8

10:20 am-11:50 am

1 stop33h 30m

San Francisco

Wed 1/7

9:00 am-9:50 am

2 stops16h 50m

$716

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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, January is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of $276). Flying from Cardiff to San Francisco in June is currently the most expensive (average of $357). 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 17h 40m. KLM provides one of the quickest options available for as low as $696. The distance from Cardiff to San Francisco is about 5267 mi. This flight may include one or multiple stops.

  • 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, January is the cheapest month in which you can book a flight from Cardiff to San Francisco (average of $276). Flying from Cardiff to San Francisco in June is currently the most expensive (average of $357). 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
Roseville
Santa Cruz
Livermore
South San Francisco
Turlock
Antioch
Watsonville
Manteca
Santa Clara
Sunnyvale
Hollister
Vacaville
Foster City
Vallejo
Burlingame
Redwood City
Union City
San Leandro
San Mateo
Lathrop

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