$564 Cheap Flights from San Juan (SJU) to Cardiff (CWL)

View $564 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Cardiff International Airport (CWL)

Cheap Flights from San Juan to Cardiff (SJU-CWL)

Prices were available within the past 7 days and start at $564 for one-way flights and $841 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Tue, Oct 28 - Mon, Nov 3
SJU
San Juan
CWL
Cardiff
$841 Roundtrip, found 7 hours ago
$841
Roundtrip
found 7 hours ago
Select KLM flight, departing Tue, Oct 28 from San Juan to Cardiff, returning Mon, Nov 3, priced at $841 found 7 hours ago
KLM
Tue, Oct 28 - Tue, Nov 4
SJU
San Juan
CWL
Cardiff
$846 Roundtrip, found 7 hours ago
$846
Roundtrip
found 7 hours ago
Select KLM flight, departing Tue, Oct 28 from San Juan to Cardiff, returning Tue, Nov 4, priced at $846 found 7 hours ago
KLM
Fri, Oct 31 - Mon, Nov 3
SJU
San Juan
CWL
Cardiff
$883 Roundtrip, found 7 hours ago
$883
Roundtrip
found 7 hours ago
Select KLM flight, departing Fri, Oct 31 from San Juan to Cardiff, returning Mon, Nov 3, priced at $883 found 7 hours ago
KLM
Fri, Oct 31 - Tue, Nov 4
SJU
San Juan
CWL
Cardiff
$888 Roundtrip, found 7 hours ago
$888
Roundtrip
found 7 hours ago
Select KLM flight, departing Fri, Oct 31 from San Juan to Cardiff, returning Tue, Nov 4, priced at $888 found 7 hours ago
KLM
Fri, Oct 31 - Wed, Nov 5
SJU
San Juan
CWL
Cardiff
$909 Roundtrip, found 7 hours ago
$909
Roundtrip
found 7 hours ago
Select KLM flight, departing Fri, Oct 31 from San Juan to Cardiff, returning Wed, Nov 5, priced at $909 found 7 hours ago
KLM
Fri, Oct 31 - Fri, Nov 7
SJU
San Juan
CWL
Cardiff
$925 Roundtrip, found 7 hours ago
$925
Roundtrip
found 7 hours ago
Select KLM flight, departing Fri, Oct 31 from San Juan to Cardiff, returning Fri, Nov 7, priced at $925 found 7 hours ago
KLM
Fri, Oct 31 - Wed, Nov 5
SJU
San Juan
CWL
Cardiff
$930 Roundtrip, found 7 hours ago
$930
Roundtrip
found 7 hours ago
Select KLM flight, departing Fri, Oct 31 from San Juan to Cardiff, returning Wed, Nov 5, priced at $930 found 7 hours ago
Delta
Fri, Oct 31 - Wed, Nov 5
SJU
San Juan
CWL
Cardiff
$1,026 Roundtrip, found 7 hours ago
$1,026
Roundtrip
found 7 hours ago
Select Delta flight, departing Fri, Oct 31 from San Juan to Cardiff, returning Wed, Nov 5, priced at $1,026 found 7 hours ago
Virgin Atlantic
Fri, Oct 31 - Wed, Nov 5
SJU
San Juan
CWL
Cardiff
$1,051 Roundtrip, found 7 hours ago
$1,051
Roundtrip
found 7 hours ago
Select Virgin Atlantic flight, departing Fri, Oct 31 from San Juan to Cardiff, returning Wed, Nov 5, priced at $1,051 found 7 hours ago
Air France
Thu, Jun 4 - Sat, Jun 13
SJU
San Juan
CWL
Cardiff
$1,826 Roundtrip, found 3 hours ago
$1,826
Roundtrip
found 3 hours ago
Select Air France flight, departing Thu, Jun 4 from San Juan to Cardiff, returning Sat, Jun 13, priced at $1,826 found 3 hours ago
Flights from San Juan (SJU) to Cardiff (CWL)
Origin airport
Luis Munoz Marin Intl.
Destination airport
Cardiff Intl.
Roundtrip price
$841
Distance
4058 mi

San Juan to Cardiff Flights

The cheapest times to fly from San Juan to Cardiff

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Juan to Cardiff are during the month of October. You can find some of the cheapest flights from San Juan to Cardiff with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to Cardiff

Sunday is one of the best days to book for cheap flights from San Juan to Cardiff: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Juan to Cardiff

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Juan to Cardiff in 2025. You can also book with separate airlines for your outbound and return journeys, from $564 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Juan to Cardiff flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Juan to Cardiff airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL) cost?
Grab a cheap one-way flight from $564 or cheap return flight from $841 from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL)?
October is the least expensive month to fly from SJU to CWL. Traveling during an off-peak travel window is often the key to finding better fares.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SJU to CWL flight.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL)?
There are no daily direct flights from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from SJU to CWL?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending on a number of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL)?
To land at Cardiff Intl. Airport (CWL) without delays, select a flight that takes off from Luis Munoz Marin Intl. Airport (SJU) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL) last-minute?
Booking your flight from SJU to CWL right before your trip is generally more expensive. However, if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a SJU to CWL flight and hotel package?
You'll typically save money by booking a SJU to CWL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've selected your preferred accommodations and flights, consider other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to Cardiff Intl. Airport (CWL)?
You can usually reschedule or cancel your SJU to CWL flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.