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Cheap flights from Cardiff to San Francisco from $755

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to San Francisco departing on 7/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Cardiff to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
5:15 pm - 11:45 am
CWL
-
SFO
26h 30m
1 stop
KLM Logo
1:45 pm - 9:15 am
SFO
-
CWL
35h 30m
1 stop
$869KLM
Tue, May 5 - Tue, May 12
KLM Logo
9:45 am - 11:45 am
CWL
-
SFO
34h 00m
1 stop
KLM Logo
1:35 pm - 4:45 pm
SFO
-
CWL
19h 10m
2 stops
$873KLM
Tue, May 5 - Tue, May 12
KLM Logo
9:45 am - 11:21 pm
CWL
-
SFO
21h 36m
2 stops
KLM Logo
6:15 am - 9:15 am
SFO
-
CWL
19h 00m
2 stops
$880KLM
Wed, May 6 - Wed, May 13
KLM Logo
9:45 am - 10:26 pm
CWL
-
SFO
20h 41m
2 stops
KLM Logo
1:35 pm - 4:45 pm
SFO
-
CWL
19h 10m
2 stops
$882KLM
Tue, May 5 - Tue, May 12
KLM Logo
5:15 pm - 11:45 am
CWL
-
SFO
26h 30m
1 stop
KLM Logo
10:00 pm - 9:15 am
SFO
-
CWL
27h 15m
2 stops
$893KLM
Sun, May 3 - Sun, May 10
Virgin Atlantic Logo
5:15 pm - 10:49 pm
CWL
-
SFO
37h 34m
2 stops
Virgin Atlantic Logo
5:00 pm - 9:15 am
SFO
-
CWL
56h 15m
2 stops
$900Virgin Atlantic
Sun, Apr 19 - Sun, Apr 26
KLM Logo
9:45 am - 11:21 pm
CWL
-
SFO
21h 36m
2 stops
KLM Logo
1:45 pm - 9:15 am
SFO
-
CWL
35h 30m
1 stop
$903KLM
Wed, May 6 - Wed, May 13
KLM Logo
9:50 am - 11:45 am
CWL
-
SFO
33h 55m
1 stop
KLM Logo
1:45 pm - 9:15 am
SFO
-
CWL
35h 30m
1 stop
$904KLM
Sun, May 3 - Sun, May 10
KLM Logo
5:15 pm - 11:45 am
CWL
-
SFO
26h 30m
1 stop
KLM Logo
1:45 pm - 9:15 am
SFO
-
CWL
35h 30m
1 stop
$907KLM
Sun, Apr 19 - Sun, Apr 26
KLM Logo
9:50 am - 11:45 am
CWL
-
SFO
33h 55m
1 stop
KLM Logo
5:00 pm - 4:45 pm
SFO
-
CWL
15h 45m
2 stops
$911KLM
Sun, Apr 19 - Sun, Apr 26

KLM flights from Cardiff to San Francisco

Our best KLM deals on Cardiff to San Francisco flight tickets
KLM
May 5
CWL5:15 pmCardiff Wales
26h 30m
1 stop
SFO11:45 amSan Francisco
May 12
SFO1:45 pmSan Francisco
35h 30m
1 stop
CWL9:15 amCardiff Wales
$869
KLM
May 5
CWL9:45 amCardiff Wales
34h 00m
1 stop
SFO11:45 amSan Francisco
May 12
SFO1:35 pmSan Francisco
19h 10m
2 stops
CWL4:45 pmCardiff Wales
$873
KLM
May 6
CWL9:45 amCardiff Wales
21h 36m
2 stops
SFO11:21 pmSan Francisco
May 13
SFO6:15 amSan Francisco
19h 00m
2 stops
CWL9:15 amCardiff Wales
$880

Virgin Atlantic flights from Cardiff to San Francisco

Our best Virgin Atlantic deals on Cardiff to San Francisco flight tickets
Virgin Atlantic
Apr 19
CWL5:15 pmCardiff Wales
37h 34m
2 stops
SFO10:49 pmSan Francisco
Apr 26
SFO5:00 pmSan Francisco
56h 15m
2 stops
CWL9:15 amCardiff Wales
$900
Virgin Atlantic
May 3
CWL9:50 amCardiff Wales
45h 47m
2 stops
SFO11:37 pmSan Francisco
May 10
SFO11:59 pmSan Francisco
25h 16m
2 stops
CWL9:15 amCardiff Wales
$917

momondo 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, momondo users made 832,500 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Cardiff to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 5/5

5:15 pm-11:45 am

1 stop26h 30m

San Francisco

Tue 5/12

1:45 pm-9:15 am

1 stop35h 30m

$869

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 5/5

9:45 am-11:45 am

1 stop34h 00m

San Francisco

Tue 5/12

1:35 pm-4:45 pm

2 stops19h 10m

$873

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 5/6

9:45 am-11:21 pm

2 stops21h 36m

San Francisco

Wed 5/13

6:15 am-9:15 am

2 stops19h 00m

$880
Quickest round-trip

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Tue 5/5

9:45 am-10:26 pm

2 stops20h 41m

San Francisco

Tue 5/12

1:35 pm-4:45 pm

2 stops19h 10m

$882

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 5/3

5:15 pm-11:45 am

1 stop26h 30m

San Francisco

Sun 5/10

10:00 pm-9:15 am

2 stops27h 15m

$893

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 4/19

5:15 pm-10:49 pm

2 stops37h 34m

San Francisco

Sun 4/26

5:00 pm-9:15 am

2 stops56h 15m

$900

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Wed 5/6

9:45 am-11:21 pm

2 stops21h 36m

San Francisco

Wed 5/13

1:45 pm-9:15 am

1 stop35h 30m

$903

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 5/3

9:50 am-11:45 am

1 stop33h 55m

San Francisco

Sun 5/10

1:45 pm-9:15 am

1 stop35h 30m

$904

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 4/19

5:15 pm-11:45 am

1 stop26h 30m

San Francisco

Sun 4/26

1:45 pm-9:15 am

1 stop35h 30m

$907

CardiffSan Francisco

CWL - SFO

CWLSFO

Cardiff Wales

Sun 4/19

9:50 am-11:45 am

1 stop33h 55m

San Francisco

Sun 4/26

5:00 pm-4:45 pm

2 stops15h 45m

$911

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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See travel insights to San Francisco from

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

What is the cheapest airline that flies from Cardiff Wales to San Francisco?

WestJet is the most popular carrier operating from Cardiff Wales to San Francisco

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 round-trip 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

  • How far is Cardiff Wales to San Francisco by plane?

    San Francisco is 5259.0 mi away from Cardiff Wales. By plane, this route typically takes 26h 30m.

  • 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?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Bodega Bay
Walnut Creek
Roseville
Hayward
Berkeley
Santa Clara
Big Sur
Fremont
Calistoga
Vallejo
Salinas
Half Moon Bay
Daly City
Milpitas
Pacific Grove
South San Francisco

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?

Flights from Cardiff to San Francisco with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Cardiff to San Francisco flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to San Francisco from Cardiff. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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