BOS - CWL

$778 Find Cheap Flights from Boston to Cardiff - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$778
Typical prices: $830-$1,360
Multiple Airlines
Wed 11/28Wed 12/5
BOS - CWL • 2 stops
When to travel
February
Cheapest • 44% price drop
April
Most popular
Good to know
+1
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Cardiff!
Flight Deals
Booking Insights
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

Sat, Nov 28 - Sat, Dec 5
Multiple Airlines Logo
7:50 pm - 8:10 amBOS  Boston Logan Intl-CWL Cardiff Wales
31h 20m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
8:15 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$778Multiple Airlines
Sat, Nov 28 - Sat, Dec 5
Multiple Airlines Logo
9:20 pm - 1:55 pmBOS  Boston Logan Intl-CWL Cardiff Wales
11h 35m1 stop Dublin
Multiple Airlines Logo
8:15 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 40m1 stop Dublin
$807Multiple Airlines
Fri, Oct 23 - Sun, Oct 25
Multiple Airlines Logo
5:25 pm - 6:55 amBOS  Boston Logan Intl-CWL Cardiff Wales
8h 30m1 stop Dublin
Multiple Airlines Logo
2:25 pm - 8:05 pmCWL  Cardiff Wales-BOS Boston Logan Intl
9h 40m1 stop Dublin
$811Multiple Airlines
Sat, Nov 28 - Sun, Dec 6
Multiple Airlines Logo
7:50 pm - 1:55 pmBOS  Boston Logan Intl-CWL Cardiff Wales
13h 05m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
2:25 pm - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
28h 30m1 stop Dublin
$850Multiple Airlines
Mon, Oct 26 - Mon, Nov 2
Multiple Airlines Logo
10:50 pm - 1:00 pmBOS  Boston Logan Intl-CWL Cardiff Wales
58h 10m2 stops Zurich Dublin
Multiple Airlines Logo
8:35 am - 1:55 pmCWL  Cardiff Wales-BOS Boston Logan Intl
10h 20m1 stop Dublin
$870Multiple Airlines
Tue, Oct 13 - Wed, Oct 28
Multiple Airlines Logo
5:25 pm - 11:25 pmBOS  Boston Logan Intl-CWL Cardiff Wales
25h 00m1 stop Dublin
Multiple Airlines Logo
9:10 pm - 9:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
28h 05m2 stops Malaga Lisbon Humberto Delgado
$879Multiple Airlines
Sun, Nov 29 - Sat, Dec 5
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 - 5:50 pmCWL  Cardiff Wales-BOS Boston Logan Intl
14h 35m2 stops Dublin Reykjavik Keflavik Intl
$897Multiple Airlines
Fri, Oct 23 - Sun, Oct 25
Multiple Airlines Logo
5:25 pm - 6:55 amBOS  Boston Logan Intl-CWL Cardiff Wales
8h 30m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 3:40 pmCWL  Cardiff Wales-BOS Boston Logan Intl
19h 50m2 stops Dublin Lisbon Humberto Delgado
$919Multiple Airlines
Tue, Oct 13 - Wed, Oct 28
Multiple Airlines Logo
8:50 pm - 11:25 pmBOS  Boston Logan Intl-CWL Cardiff Wales
21h 35m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
9:10 pm - 9:15 pmCWL  Cardiff Wales-BOS Boston Logan Intl
28h 05m2 stops Malaga Lisbon Humberto Delgado
$922Multiple Airlines
Sun, Nov 29 - Sun, Dec 6
Multiple Airlines Logo
5:15 pm - 8:10 amBOS  Boston Logan Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
2:25 pm - 5:50 pmCWL  Cardiff Wales-BOS Boston Logan Intl
32h 25m2 stops Dublin Reykjavik Keflavik Intl
$925Multiple 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.

Find deals

Key details for Boston to Cardiff flights

Low season

January
Best time to beat the crowds with an average 32% drop in price.

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.

  • 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).

More options for your flight from Boston to Cardiff

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

Car rentals in Cardiff
Hotels in Cardiff