BOS - CWL

$325 Find Cheap Flights from Boston to Cardiff - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$766
Typical prices: $830-$1,360
Multiple Airlines
Fri 10/26Fri 11/9
BOS - CWL • 1 stop
Cheapest one-way
$325
Typical prices: $429-$601
Multiple Airlines
Tue 12/11
BOS - CWL • 3 stops
When to travel
February
Cheapest • 44% price drop
April
Most popular
Good to know
+1
Good to know
+1
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Flight Deals

Cheap Flights from Boston to Cardiff (BOS-CWL)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Cardiff

Mon, Oct 26 - Mon, Nov 9
Multiple Airlines Logo
10:20 pm - 4:30 pmBOS  Boston Logan Intl-CWL Cardiff Wales
14h 10m1 stop Dublin
Multiple Airlines Logo
8:35 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 20m1 stop Dublin
$766Multiple Airlines
Wed, Nov 25 - Mon, Nov 30
Multiple Airlines Logo
5:15 pm - 1:00 pmBOS  Boston Logan Intl-CWL Cardiff Wales
14h 45m1 stop Dublin
Multiple Airlines Logo
8:35 am - 7:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
15h 30m1 stop Dublin
$766Multiple Airlines
Thu, Mar 4 - Mon, Mar 8
Multiple Airlines Logo
7:50 pm - 3:40 pmBOS  Boston Logan Intl-CWL Cardiff Wales
14h 50m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
8:35 am - 2:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$798Multiple Airlines
Wed, Nov 25 - Mon, Nov 30
Multiple Airlines Logo
5:15 pm - 1:00 pmBOS  Boston Logan Intl-CWL Cardiff Wales
14h 45m1 stop Dublin
Multiple Airlines Logo
8:35 am - 2:45 pmCWL  Cardiff Wales-BOS Boston Logan Intl
35h 10m2 stops Dublin Lisbon Humberto Delgado
$799Multiple Airlines
Sun, Nov 15 - Mon, Nov 30
Multiple Airlines Logo
5:15 pm - 8:10 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
8:35 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 20m1 stop Dublin
$809Multiple Airlines
Sun, Nov 15 - Mon, Nov 30
Multiple Airlines Logo
5:15 pm - 8:10 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
8:35 am - 2:45 pmCWL  Cardiff Wales-BOS Boston Logan Intl
35h 10m2 stops Dublin Lisbon Humberto Delgado
$818Multiple Airlines
Mon, Oct 12 - Tue, Oct 27
Multiple Airlines Logo
11:00 pm - 10:50 pmBOS  Boston Logan Intl-CWL Cardiff Wales
18h 50m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
4:55 pm - 2:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
26h 00m1 stop Dublin
$842Multiple Airlines
Thu, Mar 4 - Mon, Mar 8
Multiple Airlines Logo
9:20 pm - 3:40 pmBOS  Boston Logan Intl-CWL Cardiff Wales
13h 20m1 stop Dublin
Multiple Airlines Logo
8:35 am - 2:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$848Multiple Airlines
Mon, Oct 12 - Tue, Oct 27
Multiple Airlines Logo
9:15 pm - 10:50 pmBOS  Boston Logan Intl-CWL Cardiff Wales
20h 35m1 stop Dublin
Multiple Airlines Logo
4:55 pm - 2:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
26h 00m1 stop Dublin
$858Multiple Airlines
Mon, Oct 26 - Mon, Nov 9
Multiple Airlines Logo
10:20 pm - 4:30 pmBOS  Boston Logan Intl-CWL Cardiff Wales
14h 10m1 stop Dublin
Multiple Airlines Logo
8:35 am - 2:45 pmCWL  Cardiff Wales-BOS Boston Logan Intl
35h 10m2 stops Dublin Lisbon Humberto Delgado
$894Multiple Airlines
Booking Insights

Price, demand and travel trends for Boston to Cardiff flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What is the cheapest layover airport when flying from Boston to Cardiff?

Flights via Amsterdam Schiphol (AMS) offer the most affordable fares, with an average round-trip price of $1,149. Based on KAYAK data over the past 3 months.

When flying from Boston to Cardiff which airport offers the shortest layover?

Amsterdam Schiphol (AMS) had the shortest average connection time for Boston to Cardiff layovers at 7h 24m over the past 3 months.

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Key details for Boston to Cardiff flights

Low season

January

Cheapest flight

$325
Beat the crowds with an average 70% drop in travelers.
The most popular month to fly with an average 200% increase in travelers.
One-way flight from Boston to Cardiff

When to book flights from Boston to Cardiff

Are your dates flexible? Find out the best times to travel from Boston to Cardiff based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Boston to Cardiff flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Boston to Cardiff?

    Two cabin classes are available on flights from Boston to Cardiff:

    • Economy Class
    • Premium Economy Class

  • Do I need a passport to fly from Boston to Cardiff?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Boston to Cardiff flight?

    Round-trip flights from Boston to Cardiff range from $830 to $1,360, with an average of $1,224 over the past 12 months. Anything below $830 counts as a good deal.

  • Have flight prices from Boston to Cardiff changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $766 to $6,764. That means the highest observed fare was about 9x higher than the lowest one.

  • How are flight prices from Boston to Cardiff looking right now?

    One-way fares from Boston to Cardiff are currently higher than usual. Average one-way flight prices are about $474, which is 6% above the typical average for this route.

  • What car rental options are available at Cardiff Wales Airport (CWL)?

    Cardiff Wales Airport (CWL) hosts 5 major car rental companies, with daily rates starting from around $15 for economy cars. Top options include:

    • Alamo
    • Budget
    • Enterprise Rent-A-Car
    • Avis
    • National

  • Which airports can I use when flying from Boston to Cardiff?

    Flights from Boston to Cardiff usually depart from Boston Logan Intl (BOS) and arrive at Cardiff Wales (CWL).

  • Which airports do connecting flights from Boston to Cardiff pass through?

    Most connecting flights from Boston to Cardiff pass through Amsterdam Schiphol (AMS), which handles 100% of one-stop traffic on this route.

  • Can I save money by using flexible dates for flights from Boston to Cardiff?

    Yes. Flexible dates can save you up to 51% on flights from Boston to Cardiff. Thursday is the cheapest departure day at $839 round-trip on average, while Wednesday is the most expensive at $1,681, a difference of $842.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What is the time difference between Boston and Cardiff?

    Cardiff is 5 hours ahead of Boston (British Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking Boston to Cardiff flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Wednesday. On this route, Thursday flights average $839, about $842 less than Wednesday fares (50% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Boston to Cardiff trip for February. Fares historically average $687 round-trip in that month - typically $1,340 less than the most expensive month, which is May (based on the last 12 months).

More options for your flight from Boston to Cardiff

Complete your trip to Cardiff with a hotel stay or car rental

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