BOS - CWL

$405 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
$547
Typical prices: $830-$1,360
Multiple Airlines
Thu 11/8Fri 11/16
BOS - CWL • 1 stop
Cheapest one-way
$405
Typical prices: $429-$601
Multiple Airlines
Sun 10/7
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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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

Sun, Nov 8 - Mon, Nov 16
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
$547Multiple Airlines
Wed, Dec 9 - Mon, Dec 14
Multiple Airlines Logo
9:20 pm - 1:00 pmBOS  Boston Logan Intl-CWL Cardiff Wales
10h 40m1 stop Dublin
Multiple Airlines Logo
8:35 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 20m1 stop Dublin
$634Multiple Airlines
Thu, Dec 10 - Mon, Dec 14
Multiple Airlines Logo
10:35 pm - 3:40 pmBOS  Boston Logan Intl-CWL Cardiff Wales
12h 05m1 stop Dublin
Multiple Airlines Logo
8:35 am - 2:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 30m1 stop Dublin
$661Multiple Airlines
Thu, Nov 5 - Thu, Nov 12
Multiple Airlines Logo
4:10 pm - 3:40 pmBOS  Boston Logan Intl-CWL Cardiff Wales
18h 30m2 stops New York John F Kennedy Intl Dublin
Multiple Airlines Logo
1:25 pm - 7:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$775Multiple Airlines
Sun, Nov 8 - Mon, Nov 16
Multiple Airlines Logo
1:00 pm - 8:10 amBOS  Boston Logan Intl-CWL Cardiff Wales
14h 10m2 stops New York John F Kennedy Intl Dublin
Multiple Airlines Logo
8:35 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 20m1 stop Dublin
$784Multiple Airlines
Thu, Nov 5 - Thu, Nov 12
Multiple Airlines Logo
9:20 pm - 3:40 pmBOS  Boston Logan Intl-CWL Cardiff Wales
13h 20m1 stop Dublin
Multiple Airlines Logo
1:25 pm - 7:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$788Multiple Airlines
Sun, Nov 8 - Mon, Nov 16
Multiple Airlines Logo
9:20 pm - 11:45 amBOS  Boston Logan Intl-CWL Cardiff Wales
33h 25m3 stops Dublin Birmingham Belfast City
Multiple Airlines Logo
8:35 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 20m1 stop Dublin
$797Multiple Airlines
Wed, Dec 9 - Mon, Dec 14
Multiple Airlines Logo
6:20 pm - 1:00 pmBOS  Boston Logan Intl-CWL Cardiff Wales
13h 40m2 stops Paris Charles de Gaulle Dublin
Multiple Airlines Logo
8:35 am - 2:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 30m1 stop Dublin
$837Multiple Airlines
Fri, Oct 16 - Fri, Oct 23
Multiple Airlines Logo
5:25 pm - 6:55 amBOS  Boston Logan Intl-CWL Cardiff Wales
8h 30m1 stop Dublin
Multiple Airlines Logo
5:45 pm - 8:20 pmCWL  Cardiff Wales-BOS Boston Logan Intl
31h 35m2 stops Faro Porto
$872Multiple Airlines
Mon, Oct 19 - Mon, Oct 26
Multiple Airlines Logo
9:15 pm - 11:30 amBOS  Boston Logan Intl-CWL Cardiff Wales
33h 15m3 stops Dublin Birmingham Belfast City
Multiple Airlines Logo
8:35 am - 2:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 20m1 stop Dublin
$880Multiple 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.

Find deals

Key details for Boston to Cardiff flights

Low season

January

Cheapest flight

$405
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.

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

    One-way fares from Boston to Cardiff are currently in line with typical prices for this route. Average one-way fares are about $432.

  • 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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