CWL - BOS

$888 Find Cheap Flights from Cardiff to Boston - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$888
Typical prices: $893-$1,294
KLM
Mon 12/3Fri 12/7
CWL - BOS • 1 stop
Cheapest one-way
$1,353
Typical prices: $496-$496
KLM
Tue 11/20
CWL - BOS • 1 stop
When to travel
July
Cheapest • 21% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg $669 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 11h 01m (one-way)
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Cheap Flights from Cardiff to Boston (CWL-BOS)

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

Recent round-trip flight deals from Cardiff to Boston

Thu, Dec 3 - Mon, Dec 7
KLM Logo
5:30 pm - 2:20 pmCWL  Cardiff Wales-BOS Boston Logan Intl
25h 50m1 stop Amsterdam Schiphol
KLM Logo
7:25 pm - 9:45 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 20m1 stop Amsterdam Schiphol
$888KLM
Thu, Dec 3 - Mon, Dec 7
Virgin Atlantic Logo
10:20 am - 7:32 amCWL  Cardiff Wales-BOS Boston Logan Intl
26h 12m2 stops Amsterdam Schiphol New York John F Kennedy Intl
Virgin Atlantic Logo
7:25 pm - 9:45 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 20m1 stop Amsterdam Schiphol
$892Virgin Atlantic
Thu, Dec 3 - Mon, Dec 7
Delta Logo
10:20 am - 10:58 pmCWL  Cardiff Wales-BOS Boston Logan Intl
17h 38m2 stops Amsterdam Schiphol New York John F Kennedy Intl
Delta Logo
1:05 pm - 9:45 amBOS  Boston Logan Intl-CWL Cardiff Wales
15h 40m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol
$900Delta
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
1:25 pm - 4:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
31h 40m2 stops Dublin Paris Charles de Gaulle
Multiple Airlines Logo
10:35 pm - 3:40 pmBOS  Boston Logan Intl-CWL Cardiff Wales
12h 05m1 stop Dublin
$911Multiple Airlines
Fri, Dec 11 - Fri, Dec 18
Multiple Airlines Logo
4:05 pm - 7:40 pmCWL  Cardiff Wales-BOS Boston Logan Intl
32h 35m2 stops Dublin London Heathrow
Multiple Airlines Logo
5:15 pm - 7:50 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 35m1 stop Dublin
$988Multiple Airlines
Thu, Dec 3 - Mon, Dec 7
Multiple Airlines Logo
5:30 pm - 5:50 pmCWL  Cardiff Wales-BOS Boston Logan Intl
29h 20m3 stops Amsterdam Schiphol Dublin Reykjavik Keflavik Intl
Multiple Airlines Logo
7:50 pm - 9:50 amBOS  Boston Logan Intl-CWL Cardiff Wales
33h 00m3 stops Reykjavik Keflavik Intl Dublin Amsterdam Schiphol
$993Multiple Airlines
Wed, Dec 23 - Sat, Dec 26
Multiple Airlines Logo
9:40 pm - 2:20 pmCWL  Cardiff Wales-BOS Boston Logan Intl
21h 40m2 stops Dublin Amsterdam Schiphol
Multiple Airlines Logo
5:15 pm - 1:55 pmBOS  Boston Logan Intl-CWL Cardiff Wales
15h 40m1 stop Dublin
$997Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
1:25 pm - 7:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
Multiple Airlines Logo
9:20 pm - 3:40 pmBOS  Boston Logan Intl-CWL Cardiff Wales
13h 20m1 stop Dublin
$999Multiple Airlines
Wed, Dec 23 - Sat, Dec 26
Multiple Airlines Logo
10:20 am - 7:01 pmCWL  Cardiff Wales-BOS Boston Logan Intl
13h 41m1 stop Amsterdam Schiphol
Multiple Airlines Logo
7:25 pm - 9:50 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 25m1 stop Amsterdam Schiphol
$1,014Multiple Airlines
Fri, Dec 11 - Fri, Dec 18
Multiple Airlines Logo
10:20 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
32h 35m2 stops Amsterdam Schiphol Dublin
Multiple Airlines Logo
9:20 pm - 9:50 amBOS  Boston Logan Intl-CWL Cardiff Wales
31h 30m2 stops Dublin Amsterdam Schiphol
$1,038Multiple Airlines
Booking Insights

Price, demand and travel trends for Cardiff to Boston flights

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

How much is a round-trip flight from Cardiff to Boston?

Round-trip flights from Cardiff to Boston typically range from $893 to $1,294. The lowest price found in the past 5 days was $888, on KLM.

What's the cheapest day of the week to fly from Cardiff to Boston?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Cardiff to Boston. It’s 36% cheaper than the average day, while Saturday is the most expensive, with prices 438% higher.

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Key details for Cardiff to Boston flights

Cheapest flight

$888
The most popular month to fly with an average 17% increase in travelers.
Round-trip flight from Cardiff to Boston

When to book flights from Cardiff to Boston

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

Your Cardiff to Boston 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 Cardiff to Boston?

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

  • How long is a flight from Cardiff to Boston?

    There are currently no nonstop flights available from Cardiff to Boston. Flights with 1 layover take between 11h 01m and 20h 04m in total, depending on the connection.

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

    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 Cardiff to Boston flight?

    Round-trip flights from Cardiff to Boston range from $893 to $1,294, with an average of $1,031 over the past 12 months. Anything below $893 counts as a good deal.

  • Have flight prices from Cardiff to Boston 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 $888 to $1,900. That means the highest observed fare was about 2x higher than the lowest one.

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

    One-way fares from Cardiff to Boston are currently higher than usual. Average one-way flight prices are about $1,356, which is 173% above the typical average for this route.

  • What car rental options are available at Boston Logan Intl Airport (BOS)?

    Boston Logan Intl Airport (BOS) hosts 5 major car rental companies, with daily rates averaging $77 for economy cars. Top options include:

    • Dollar
    • Hertz
    • Budget
    • Thrifty
    • Sixt

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

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

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

    Connecting flights from Cardiff to Boston most commonly pass through:

    • Amsterdam Schiphol (AMS) - 92% of one-stop connections
    • Toronto Pearson Intl (YYZ) - 8% of one-stop connections

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

    Yes. Flexible dates can save you up to 88% on flights from Cardiff to Boston. Monday is the cheapest departure day at $669 round-trip on average, while Saturday is the most expensive at $5,552, a difference of $4,883.

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

    Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 11h 01m, compared with 20h 04m via Toronto Pearson Intl (YYZ).

  • What is the time difference between Cardiff and Boston?

    Boston is 4 hours behind Cardiff (Eastern Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Boston?

    Some of the most popular sights in Boston are TD Garden, Fenway Park and Boston Common. These are among the most viewed places in Boston on KAYAK.

Your guide to booking Cardiff to Boston 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 Monday departure and avoid flying on Saturday. On this route, Monday flights average $669, about $4,883 less than Saturday fares (88% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Cardiff to Boston trip for July. Fares historically average $811 round-trip in that month - typically $4,895 less than the most expensive month, which is August (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Boston Logan Intl Airport.

    • Hyatt Regency Boston Harbor
    • Hilton Garden Inn Boston Logan Airport
    • Hilton Boston Logan Airport

More options for your flight from Cardiff to Boston

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