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

According to our current data, KLM ($837), and Delta ($847) offers the cheapest pricing from San Francisco to Cardiff.

What are the cheapest airlines to fly from San Francisco to Cardiff one-way?

The cheapest airline one-way is ITA Airways, with whom users have recently found tickets for as low as $775. However, be on the lookout for offers from Virgin Atlantic and KLM, as they are both options that can get you from San Francisco to Cardiff for a low price.

What is the cheapest month to book a flight from San Francisco to Cardiff?

Currently, February is the cheapest month in which you can book a flight from San Francisco to Cardiff (average of $773). Flying from San Francisco to Cardiff in June is currently the most expensive (average of $1,622). 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.

What is the cheapest day to fly from San Francisco to Cardiff?

Travelers seeking maximum savings on their San Francisco to Cardiff flight should consider departing on Thursday at noon when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from San Francisco to Cardiff?

Travelers have found that booking a Wednesday departure is the best way to save up to 2% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

What is the cheapest time of day to fly from SFO to CWL?

When flying from San Francisco to Cardiff, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 7% versus a flight in the morning.

Most accurate provider : When it comes to deals on San Francisco-Cardiff flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Cardiff flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Cardiff flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on San Francisco-Cardiff 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 San Francisco-Cardiff flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 vacation 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.

$356+ Flights from San Francisco to Cardiff

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1. Tell us where you want to go

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Cheap flight deals from San Francisco to Cardiff

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$837 (KLM)
One-way from	$356 (Kiwi.com)

Provider with most accurate pricing for San Francisco-Cardiff Wales flight deals.

Search Deals

Provider most trusted by Cheapflights users for San Francisco-Cardiff Wales flights.

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From San Francisco to Cardiff Wales

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One-way flight from San Francisco to Cardiff Wales

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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 March 28, 2025.

Sun 4/206:30 amSFO - CWL

2 stops18h 45mKLM

Sun 4/275:15 pmCWL - SFO

1 stop26h 30mKLM

Deal found 3/27

$837

Sun 4/206:30 amSFO - CWL

2 stops18h 45mDelta

Sun 4/279:50 amCWL - SFO

2 stops22h 09mDelta

Deal found 3/27

$847

Best flights from San Francisco to Cardiff
Discover carefully curated flight deals from San Francisco to Cardiff that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Sun 4/206:30 amSFO - CWL

2 stops18h 45mKLM

Sun 4/275:15 pmCWL - SFO

1 stop26h 30mKLM

Deal found 3/27

$837

Sun 4/206:30 amSFO - CWL

2 stops18h 45mDelta

Sun 4/279:50 amCWL - SFO

2 stops22h 09mDelta

Deal found 3/27

$847

Last-minute flights from San Francisco to Cardiff
Discover last-minute flight deals from San Francisco to Cardiff. Data last updated March 28, 2025 and is based on user searches.

Sun 4/206:30 amSFO - CWL

2 stops18h 45mKLM

Sun 4/275:15 pmCWL - SFO

1 stop26h 30mKLM

Deal found 3/27

$837

Sun 4/206:30 amSFO - CWL

2 stops18h 45mDelta

Sun 4/279:50 amCWL - SFO

2 stops22h 09mDelta

Deal found 3/27

$847

One-way flights from San Francisco to Cardiff
Search for one-way flight options from San Francisco to Cardiff. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Mon 6/26:05 pmSFO - CWL

3 stops53h 20mMultiple Airlines

Deal found 3/26

$356

Sun 6/13:15 pmSFO - CWL

2 stops41h 30mITA Airways

Deal found 3/26

$775

Sun 6/11:45 pmSFO - CWL

1 stop35h 30mVirgin Atlantic

Deal found 3/26

$800

Mon 6/23:15 pmSFO - CWL

2 stops17h 30mKLM

Deal found 3/26

$818

Fri 5/3012:40 amSFO - CWL

2 stops24h 35mDelta

Deal found 3/26

$888

Cheapflights Fare Finder

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

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Sun 4/20

6:30 am-9:15 am

2 stops18h 45m

Cardiff Wales

Sun 4/27

5:15 pm-11:45 am

1 stop26h 30m

$837

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Sun 4/20

6:30 am-9:15 am

2 stops18h 45m

Cardiff Wales

Sun 4/27

9:50 am-11:59 pm

2 stops22h 09m

$847

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Mon 6/2

6:05 pm-7:25 am

3 stops53h 20m

$356

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Sun 6/1

3:15 pm-4:45 pm

2 stops41h 30m

$775

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Sun 6/1

1:45 pm-9:15 am

1 stop35h 30m

$800

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Mon 6/2

3:15 pm-4:45 pm

2 stops17h 30m

$818

San FranciscoCardiff

SFO - CWL

SFOCWL

San Francisco

Fri 5/30

12:40 am-9:15 am

2 stops24h 35m

$888

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Compare providers for flights from San Francisco to Cardiff

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Cardiff in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on San Francisco-Cardiff flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Cardiff flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Cardiff flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on San Francisco-Cardiff 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 San Francisco-Cardiff 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 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 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 San Francisco to Cardiff

Rainfall in Cardiff by month

In terms of precipitation, rainfall in Cardiff ranges from 2.0 - 3.5 inches per month. January is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Cardiff when rainfall is around 2.0 in.

Temperature in Cardiff 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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Cardiff

Delta

8.0

Very good

7,896 reviews

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

7,896 reviews

Delta

8.0

Very good

7,896 reviews

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

1,321 reviews

Delta

8.0

Very good

7,896 reviews

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.

Virgin Atlantic

7.4

Good

634 reviews

Delta

8.0

Very good

7,896 reviews

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.

ITA Airways

6.7

Okay

946 reviews

Delta

8.0

Very good

7,896 reviews

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

What are the cheapest airlines flying from San Francisco to Cardiff round-trip?
According to our current data, KLM ($837), and Delta ($847) offers the cheapest pricing from San Francisco to Cardiff.
What are the cheapest airlines to fly from San Francisco to Cardiff one-way?
The cheapest airline one-way is ITA Airways, with whom users have recently found tickets for as low as $775. However, be on the lookout for offers from Virgin Atlantic and KLM, as they are both options that can get you from San Francisco to Cardiff for a low price.
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 vacation 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, February is the cheapest month in which you can book a flight from San Francisco to Cardiff (average of $773). Flying from San Francisco to Cardiff in June is currently the most expensive (average of $1,622). 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

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$356+ Cheap flights from San Francisco (SFO) to Cardiff (CWL)

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Francisco to Cardiff with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from San Francisco to Cardiff

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Find flight deals from San Francisco to Cardiff

Cheapest flights from San Francisco to CardiffExplore 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 March 28, 2025.

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 March 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Cardiff that are best for you.

Compare providers for flights from San Francisco to Cardiff

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Cardiff in March.

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.

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.

Temperature in Cardiff by month

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

Reviews of airlines servicing Cardiff

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?

What are the cheapest airlines to fly from San Francisco to Cardiff one-way?

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

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

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

What is the cheapest month to book a flight from San Francisco to Cardiff?

Traveling to a place near San Francisco?

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Alternative routes for San Francisco to Cardiff

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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 March 28, 2025.