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Cheap flights from San Francisco to Cardiff from £1,676

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Cardiff departing on 26/8. 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

Find the cheapest flights from San Francisco to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
WestJet Logo
06:00 - 10:15SFO  San Francisco-CWL Cardiff Wales
20h 15m2 stops Calgary Toronto Pearson Intl
WestJet Logo
11:35 - 12:00CWL  Cardiff Wales-SFO San Francisco
56h 25m2 stops Toronto Pearson Intl Calgary
£1,676WestJet
Wed, 26 Aug - Sat, 29 Aug
WestJet Logo
06:00 - 10:15SFO  San Francisco-CWL Cardiff Wales
20h 15m2 stops Calgary Toronto Pearson Intl
WestJet Logo
11:35 - 21:55CWL  Cardiff Wales-SFO San Francisco
42h 20m2 stops Toronto Pearson Intl Calgary
£1,886WestJet
Fri, 28 Aug - Mon, 31 Aug

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WestJet flights from San Francisco to Cardiff

Our best WestJet deals on San Francisco to Cardiff flight tickets
WestJet
26 Aug
SFO06:00San Francisco
20h 15m
2 stops
CWL10:15Cardiff Wales
29 Aug
CWL11:35Cardiff Wales
56h 25m
2 stops
SFO12:00San Francisco
£1,676
WestJet
29 Aug
SFO18:05San Francisco
32h 10m
2 stops
CWL10:15Cardiff Wales
1 Sept
CWL11:35Cardiff Wales
42h 20m
2 stops
SFO21:55San Francisco
£1,690
WestJet
28 Aug
SFO06:00San Francisco
20h 15m
2 stops
CWL10:15Cardiff Wales
31 Aug
CWL11:35Cardiff Wales
42h 20m
2 stops
SFO21:55San Francisco
£1,886

momondo 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, momondo users made 279,928 searches. Data last updated 15 August 2026.
Use the filters below to find and compare flights from San Francisco to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoCardiff

SFO San Francisco - CWL Cardiff Wales

SFOCWL

San Francisco

Wed 26/8

06:00-10:15

2 stops20h 15m

Cardiff Wales

Sat 29/8

11:35-12:00

2 stops56h 25m

£1,676
Fastest return journey

San FranciscoCardiff

SFO San Francisco - CWL Cardiff Wales

SFOCWL

San Francisco

Fri 28/8

06:00-10:15

2 stops20h 15m

Cardiff Wales

Mon 31/8

11:35-21:55

2 stops42h 20m

£1,886

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from San Francisco to Cardiff

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Cardiff according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap San Francisco to Cardiff (SFO to CWL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Cardiff

Fastest flight time

19h 00m

Direct flights

None
The fastest flight from San Francisco to Cardiff takes 19h 00m
There are no direct flights from San Francisco to Cardiff. There are no popular flight routes from San Francisco to Cardiff.
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Frequently asked questions about flying from San Francisco to Cardiff

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

    San Francisco and Cardiff Wales are 5259.3 mi apart from one another. A reasonable flight in good conditions will take 19h 00m.

  • When did momondo last update prices for flights from San Francisco Airport to Cardiff Wales Airport?

    Prices for flights from San Francisco Airport to Cardiff Wales Airport refresh daily.

  • How old do you have to be to fly from San Francisco Airport to Cardiff Wales 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 San Francisco Airport to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The required travel and health documents for your Cardiff Wales Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Cardiff Wales Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Frequently asked questions about flying from San Francisco to Cardiff

  • How do I get Price Alerts for flights from San Francisco to Cardiff?

    Price Alerts will notify you by email when the price for flights to Cardiff from San Francisco decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from San Francisco to Cardiff with momondo?

    By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry
Bridgend

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Cardiff?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Cardiff from San Francisco.

Can I find flights from San Francisco to Cardiff with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Cardiff from San Francisco with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Cardiff from San Francisco.

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

Yes. momondo can track prices for San Francisco to Cardiff flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Cardiff trip

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Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport