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Cheap flights from San Francisco to Cardiff from £270

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — CWL
18 Jun — 25 Jun1
1 adult

Cheap flight deals from San Francisco to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Cardiff (CWL). 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 13 June 2025.

Round-trip from

£604

One-way from

£270
KLM
  • KLM
  • 29/9-7/10
  • 2 total stops
  • 69h 25m total
  • San Francisco to Cardiff
Search Deals
31/8
  • 31/8
  • 3 total stops
  • 41h 10m total
  • San Francisco to Cardiff
Search Deals

Find flight deals from San Francisco to Cardiff

Cheapest flights from San Francisco to Cardiff
Explore the most affordable flight options available from San Francisco to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Mon 29/913:45SFO - CWL
1 stop35h 30mKLM
Tue 7/1009:50CWL - SFO
1 stop33h 55mKLM
Deal found 11/6£604
Mon 29/907:00SFO - CWL
2 stops18h 15mDelta
Tue 7/1009:50CWL - SFO
2 stops23h 28mDelta
Deal found 11/6£689
Tue 24/613:25SFO - CWL
3 stops38h 05mMultiple Airlines
Sat 12/709:00CWL - SFO
3 stops32h 30mMultiple Airlines
Deal found 12/6£1,147

Cheapflights Fare Finder

Customise your flight search to find flights from San Francisco to Cardiff 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 13 June 2025.
Use the filters below to find and compare flights from San Francisco to Cardiff that are best for you.

Fly from

San Francisco

Fly to

Cardiff

Route

Depart

Return

Price

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Mon 29/9

13:45-09:15

1 stop35h 30m

Cardiff Wales

Tue 7/10

09:50-11:45

1 stop33h 55m

£604

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Mon 29/9

07:00-09:15

2 stops18h 15m

Cardiff Wales

Tue 7/10

09:50-01:18

2 stops23h 28m

£689

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Tue 24/6

13:25-11:30

3 stops38h 05m

Cardiff Wales

Sat 12/7

09:00-09:30

3 stops32h 30m

£1,147

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Sun 31/8

14:45-15:55

3 stops41h 10m

£270

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Sun 17/8

13:45-09:15

1 stop35h 30m

£369

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Best time to book a flight from San Francisco to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from San Francisco 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 San Francisco to Cardiff

Rainfall in Cardiff by month

Plan your trip to Cardiff by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Cardiff ranges from 50.0 - 90.0 inches per month. January is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Cardiff when rainfall is around 50.0 mm.

Temperature in Cardiff by month

Plan your trip to Cardiff by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Cardiff, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Cardiff

Get insights into the airlines that provide service to Cardiff. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cardiff. Reviews last updated 13 June 2025.
Read through reviews of airlines operating flights from San Francisco to Cardiff, such as Delta and KLM. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,950 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Cardiff. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from San Francisco to Cardiff round-trip?

    Flying on KLM is currently your cheapest option to Cardiff, with prices starting at £604. Another option worth looking into is Delta, starting at £689 return.

  • Can I find deals for flights from San Francisco to Cardiff that include hotel bookings?

    Yes. In addition to deals on San Francisco to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Cardiff.

  • Can I find deals for business class flights from San Francisco to Cardiff?

    Yes. Cheapflights offers flight deals from San Francisco to Cardiff 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 San Francisco to Cardiff?

    Currently, July is the cheapest month in which you can book a flight from San Francisco to Cardiff (average of £169). Flying from San Francisco to Cardiff in December is currently the most expensive (average of £263). 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
Barry
Bridgend

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