BOS - CWL

$624 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
$760
Typical prices: $830-$1,360
Multiple Airlines
Thu 9/20Sat 10/6
BOS - CWL • 1 stop
Cheapest one-way
$624
Typical prices: $429-$601
Delta
Mon 9/10
BOS - CWL • 1 stop
When to travel
February
Cheapest • 44% price drop
April
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Amsterdam Schiphol (AMS)
Cheapest • Avg $1,165 (round-trip)
Dublin (DUB)
Shortest trip • 10h 27m (one-way)
Insights
Insights
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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, Sep 20 - Tue, Oct 6
Multiple Airlines Logo
9:15 pm - 9:45 pmBOS  Boston Logan Intl-CWL Cardiff Wales
19h 30m1 stop Dublin
Multiple Airlines Logo
4:15 pm - 6:50 pmCWL  Cardiff Wales-BOS Boston Logan Intl
31h 35m2 stops Malaga Dublin
$760Multiple Airlines
Mon, Sep 21 - Tue, Oct 6
Multiple Airlines Logo
9:40 pm - 10:50 pmBOS  Boston Logan Intl-CWL Cardiff Wales
20h 10m2 stops Zurich Dublin
Multiple Airlines Logo
11:15 pm - 4:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
21h 50m2 stops Dublin Toronto Pearson Intl
$778Multiple Airlines
Sun, Sep 20 - Wed, Oct 7
Multiple Airlines Logo
9:15 pm - 9:45 pmBOS  Boston Logan Intl-CWL Cardiff Wales
19h 30m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 9:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
26h 15m2 stops Dublin Barcelona-El Prat
$803Multiple Airlines
Sun, Sep 6 - Thu, Sep 10
Multiple Airlines Logo
11:35 pm - 9:05 amBOS  Boston Logan Intl-CWL Cardiff Wales
28h 30m2 stops Barcelona-El Prat Malaga
Multiple Airlines Logo
11:35 am - 6:35 pmCWL  Cardiff Wales-BOS Boston Logan Intl
12h 00m1 stop Toronto Pearson Intl
$833Multiple Airlines
Tue, Sep 1 - Tue, Sep 15
Multiple Airlines Logo
9:15 pm - 11:25 pmBOS  Boston Logan Intl-CWL Cardiff Wales
21h 10m1 stop Dublin
Multiple Airlines Logo
11:15 pm - 10:30 amCWL  Cardiff Wales-BOS Boston Logan Intl
40h 15m2 stops Dublin Toronto Pearson Intl
$839Multiple Airlines
Tue, Sep 1 - Tue, Sep 8
Multiple Airlines Logo
9:15 pm - 11:25 pmBOS  Boston Logan Intl-CWL Cardiff Wales
21h 10m1 stop Dublin
Multiple Airlines Logo
11:15 pm - 9:05 amCWL  Cardiff Wales-BOS Boston Logan Intl
38h 50m2 stops Dublin Toronto Pearson Intl
$848Multiple Airlines
Mon, Sep 21 - Tue, Oct 6
Multiple Airlines Logo
9:15 pm - 10:50 pmBOS  Boston Logan Intl-CWL Cardiff Wales
20h 35m1 stop Dublin
Multiple Airlines Logo
9:45 pm - 9:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
52h 20m2 stops Alicante Barcelona-El Prat
$849Multiple Airlines
Thu, Oct 1 - Thu, Oct 15
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 - 7:41 pmCWL  Cardiff Wales-BOS Boston Logan Intl
25h 51m2 stops Dublin Toronto Pearson Intl
$862Multiple Airlines
Fri, Nov 27 - Sat, Dec 5
Multiple Airlines Logo
5:50 pm - 7:50 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 00m1 stop Dublin
Multiple Airlines Logo
8:15 am - 6:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
15h 40m1 stop Dublin
$888Multiple Airlines
Sat, Sep 5 - Wed, Sep 9
Multiple Airlines Logo
9:15 pm - 9:20 pmBOS  Boston Logan Intl-CWL Cardiff Wales
19h 05m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 2:45 pmCWL  Cardiff Wales-BOS Boston Logan Intl
19h 55m2 stops Dublin Lisbon Humberto Delgado
$897Multiple 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 most popular layover airport when flying from Boston to Cardiff?

Amsterdam Schiphol (AMS) is the most popular layover for the Boston to Cardiff route. 96% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via AMS.

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 $1,165. Based on KAYAK data over the past 3 months.

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

Dublin (DUB) had the shortest average connection time for Boston to Cardiff layovers at 407 minutes over the past 3 months.

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Key details for Boston to Cardiff flights

Low season

January

Cheapest flight

$624
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?

    Only Economy Class is available on flights from Boston to Cardiff.

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

    Connecting flights from Boston to Cardiff most commonly pass through:

    • Amsterdam Schiphol (AMS) - 96% of one-stop connections
    • Dublin (DUB) - 4% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • 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.

  • How long is a flight from Boston to Cardiff?

    There are currently no nonstop flights available from Boston to Cardiff. Flights with 1 layover take between 10h 27m and 11h 33m in total, depending on the connection.

  • 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 $760 to $5,495. That means the highest observed fare was about 7x 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 $626, which is 41% above the typical average for this route.

  • How much time can I save by choosing a different layover airport from Boston to Cardiff?

    Flying via Dublin (DUB) gives the shortest average 1-stop total travel time at 10h 27m, compared with 11h 33m via Amsterdam Schiphol (AMS).

  • 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)