BOS - CWL

$384 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
$640
Typical prices: $830-$1,360
Multiple Airlines
Fri 10/12Fri 10/19
BOS - CWL • 1 stop
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 12 - Mon, Oct 19
Multiple Airlines Logo
9:15 pm - 10:50 pmBOS  Boston Logan Intl-CWL Cardiff Wales
20h 35m1 stop Dublin
Multiple Airlines Logo
10:10 pm - 9:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
51h 55m2 stops Dublin Barcelona-El Prat
$640Multiple Airlines
Thu, Oct 15 - Thu, Oct 22
Multiple Airlines Logo
5:25 pm - 7:20 amBOS  Boston Logan Intl-CWL Cardiff Wales
8h 55m1 stop Dublin
Multiple Airlines Logo
9:00 am - 6:50 pmCWL  Cardiff Wales-BOS Boston Logan Intl
38h 50m2 stops Malaga Dublin
$787Multiple Airlines
Wed, Jan 13 - Mon, Jan 18
Multiple Airlines Logo
7:50 pm - 1:00 pmBOS  Boston Logan Intl-CWL Cardiff Wales
12h 10m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
8:35 am - 2:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$836Multiple Airlines
Thu, Jan 14 - Mon, Jan 18
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
$839Multiple Airlines
Sun, Nov 1 - Sat, Dec 12
Multiple Airlines Logo
5:15 pm - 8:10 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
8:15 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$851Multiple Airlines
Sun, Nov 1 - Sat, Dec 12
Multiple Airlines Logo
5:15 pm - 8:10 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
7:55 am - 2:40 pmCWL  Cardiff Wales-BOS Boston Logan Intl
35h 45m3 stops Alicante Barcelona-El Prat Lisbon Humberto Delgado
$857Multiple Airlines
Fri, Jan 15 - Mon, Jan 18
Multiple Airlines Logo
5:15 pm - 7:50 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 35m1 stop Dublin
Multiple Airlines Logo
8:35 am - 7:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
15h 40m1 stop Dublin
$869Multiple Airlines
Wed, Jan 13 - Thu, Jan 21
Multiple Airlines Logo
7:50 pm - 1:00 pmBOS  Boston Logan Intl-CWL Cardiff Wales
12h 10m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
1:25 pm - 7:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 50m1 stop Dublin
$871Multiple Airlines
Wed, Jan 13 - Mon, Jan 18
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 - 2:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$882Multiple Airlines
Thu, Oct 15 - Thu, Oct 22
Multiple Airlines Logo
5:25 pm - 7:20 amBOS  Boston Logan Intl-CWL Cardiff Wales
8h 55m1 stop Dublin
Multiple Airlines Logo
10:50 pm - 2:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
21h 05m1 stop Dublin
$883Multiple 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 from Boston to Cardiff 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 444 minutes over the past 3 months.

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Key details for Boston to Cardiff flights

Low season

January

Cheapest flight

$640
Best time to beat the crowds with an average 32% drop in price.
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 route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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).

  • 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

  • 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. Other layover airports each see under 5%.

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

    Yes. Being flexible with your travel dates can save you up to 51% on the Boston to Cardiff route. 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.

  • 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.

  • 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 $640 to $1,351. That means the highest observed fare was about 2x higher than the lowest one.

  • 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.

  • 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

  • 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.

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 can be flexible, aim for a Thursday departure instead of Wednesday. On this route, Thursday flights average $839 - about $842 less than Wednesday (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).

Everything you need to know for your flight from Boston to Cardiff

Information on your arrival and departure airports

Boston (BOS)
Cardiff (CWL)