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Cheap flights from Boston to Cardiff from £214

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CWL
26 Jun — 3 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to Cardiff

Enter your travel dates to find the best prices.

Cheapest flights from Boston to Cardiff
Explore the most affordable flight options available from Boston to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 May 2026.

Sat 19/920:50
BOS
-
CWL
2 stops19h 30m
Multiple Airlines
Sat 26/907:30
CWL
-
BOS
2 stops16h 20m
Multiple Airlines
Deal found 25/5£529
Wed 5/812:30
BOS
-
CWL
1 stop16h 45m
Multiple Airlines
Wed 12/823:15
CWL
-
BOS
2 stops28h 23m
Multiple Airlines
Deal found 26/5£545
Tue 23/615:25
BOS
-
CWL
2 stops37h 50m
Multiple Airlines
Tue 30/611:35
CWL
-
BOS
1 stop26h 30m
Multiple Airlines
Deal found 24/5£583
Thu 18/615:25
BOS
-
CWL
3 stops25h 55m
Multiple Airlines
Tue 30/623:15
CWL
-
BOS
2 stops25h 00m
Multiple Airlines
Deal found 27/5£591
Wed 1/710:05
BOS
-
CWL
1 stop19h 10m
Multiple Airlines
Sat 11/711:35
CWL
-
BOS
1 stop12h 40m
Multiple Airlines
Deal found 26/5£635
Wed 9/921:15
BOS
-
CWL
1 stop20h 10m
Multiple Airlines
Mon 14/922:10
CWL
-
BOS
2 stops26h 05m
Multiple Airlines
Deal found 23/5£650
Fri 18/917:25
BOS
-
CWL
1 stop8h 30m
Multiple Airlines
Sun 27/909:35
CWL
-
BOS
2 stops17h 10m
Multiple Airlines
Deal found 24/5£660
Thu 17/921:15
BOS
-
CWL
1 stop20h 05m
Multiple Airlines
Sun 27/909:35
CWL
-
BOS
2 stops17h 10m
Multiple Airlines
Deal found 24/5£662

Find flight deals from Boston to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Cardiff (CWL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 May 2026.

Round-trip from

£529

One-way from

£214

Popular in

May

Cheapest in

February

Average price

£1,251
19/9-26/9
  • 19/9-26/9
  • 4 total stops
  • 35h 50m total
  • Boston to Cardiff
Search Deals
23/6
  • 23/6
  • 2 total stops
  • 37h 50m total
  • Boston to Cardiff
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£184 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£34 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boston to Cardiff that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 May 2026.
Use the filters below to find and compare flights from Boston to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 1/7

21:15-22:25

1 stop20h 10m

Cardiff Wales

Sat 11/7

07:30-10:29

2 stops31h 59m

£652

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 17/7

10:05-10:15

1 stop19h 10m

Cardiff Wales

Sun 26/7

21:45-19:15

2 stops26h 30m

£756

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 6/9

16:40-09:15

1 stop11h 35m

Cardiff Wales

Mon 14/9

17:15-16:35

1 stop28h 20m

£805

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 6/9

19:00-16:45

1 stop16h 45m

Cardiff Wales

Mon 14/9

09:45-23:58

2 stops19h 13m

£815
Fastest return journey

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 29/7

16:40-09:15

1 stop11h 35m

Cardiff Wales

Wed 12/8

09:45-16:37

1 stop11h 52m

£825

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 26/7

19:00-16:45

1 stop16h 45m

Cardiff Wales

Thu 13/8

09:45-22:43

2 stops17h 58m

£833
Cheapest one-way

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 22/6

15:25-10:15

2 stops13h 50m

£276

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 29/6

15:25-10:15

2 stops13h 50m

£279

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 10/9

19:00-16:45

1 stop16h 45m

£367
Fastest single journey

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 11/9

19:00-09:15

1 stop9h 15m

£367

Flights are sorted by cheapest return flights first.

Deals found on 23/5

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Boston to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Boston to Cardiff?

Currently, February is the cheapest month in which you can book a flight from Boston to Cardiff (average of £511). Flying from Boston to Cardiff in May is currently the most expensive (average of £1,251). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Boston to Cardiff. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Cardiff?

    KLM can get you from Boston to Cardiff in just under 11h 35m. Your travel time can differ by up to . Boston and Cardiff are separated by a distance of 3137 mi.

  • Can I find deals for flights from Boston to Cardiff that include hotel bookings?

    Yes. In addition to deals on Boston to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Cardiff.

  • Can I find deals for business class flights from Boston to Cardiff?

    Yes. Cheapflights offers flight deals from Boston to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Cardiff?

    Currently, February is the cheapest month in which you can book a flight from Boston to Cardiff (average of £511). Flying from Boston to Cardiff in May is currently the most expensive (average of £1,251). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry
Bridgend

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How does Cheapflights help users find flights from Boston to Cardiff?

Cheapflights makes it easy to find Boston to Cardiff flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Boston to Cardiff?

Cheapflights helps you find that perfect flight to Cardiff from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Boston to Cardiff with no change fees?

Yes, we can. To see specific flights from Boston to Cardiff with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Boston to Cardiff become cheaper?

Yes, Cheapflights offers price alerts on Boston to Cardiff flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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