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Cheap flights from Boston to Cardiff from £326

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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CWL
11 Feb — 18 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 12 January 2026.

Round-trip from

£351

One-way from

£326

Popular in

June

Cheapest in

January

Average price

£548
8/2-15/2
  • 8/2-15/2
  • 4 total stops
  • 42h 40m total
  • Boston to Cardiff
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3/7
  • 3/7
  • 1 total stop
  • 10h 35m total
  • Boston to Cardiff
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Highest demand for flights based on searches. 18% potential increase in price (£115 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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Find 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 12 January 2026.

Sun 8/220:40BOS - CWL
2 stops21h 25mMultiple Airlines
Sun 15/221:20CWL - BOS
2 stops21h 15mMultiple Airlines
Deal found 11/1£351
Tue 14/423:30BOS - CWL
1 stop18h 55mMultiple Airlines
Tue 21/423:15CWL - BOS
2 stops26h 50mMultiple Airlines
Deal found 11/1£375
Tue 24/216:15BOS - CWL
2 stops18h 15mMultiple Airlines
Tue 3/317:25CWL - BOS
3 stops27h 32mMultiple Airlines
Deal found 10/1£457
Tue 14/417:25BOS - CWL
1 stop25h 00mMultiple Airlines
Mon 20/422:25CWL - BOS
2 stops27h 40mMultiple Airlines
Deal found 11/1£465
Tue 24/219:10BOS - CWL
1 stop9h 40mKLM
Tue 3/317:25CWL - BOS
1 stop30h 30mKLM
Deal found 10/1£489
Tue 20/119:10BOS - CWL
1 stop9h 40mKLM
Tue 27/110:20CWL - BOS
1 stop32h 10mKLM
Deal found 10/1£490
Tue 14/416:35BOS - CWL
1 stop19h 10mAir France
Tue 21/417:15CWL - BOS
1 stop28h 10mAir France
Deal found 11/1£501
Tue 20/113:00BOS - CWL
2 stops15h 50mDelta
Tue 27/110:20CWL - BOS
2 stops18h 30mDelta
Deal found 10/1£501
Sun 29/313:55BOS - CWL
2 stops14h 20mDelta
Fri 10/409:45CWL - BOS
1 stop11h 40mDelta
Deal found 10/1£504

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 12 January 2026.
Use the filters below to find and compare flights from Boston to Cardiff that are best for you.

Fly from

Boston

Fly to

Cardiff

Route

Depart

Return

Price

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 14/4

23:30-23:25

1 stop18h 55m

Cardiff Wales

Tue 21/4

23:15-21:05

2 stops26h 50m

£375

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 24/2

16:15-15:30

2 stops18h 15m

Cardiff Wales

Tue 3/3

17:25-15:57

3 stops27h 32m

£457

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 14/4

17:25-23:25

1 stop25h 00m

Cardiff Wales

Mon 20/4

22:25-21:05

2 stops27h 40m

£465

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 24/2

19:10-09:50

1 stop9h 40m

Cardiff Wales

Tue 3/3

17:25-18:55

1 stop30h 30m

£489

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 14/4

16:35-16:45

1 stop19h 10m

Cardiff Wales

Mon 20/4

17:15-16:25

1 stop28h 10m

£501

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 14/4

16:35-16:45

1 stop19h 10m

Cardiff Wales

Tue 21/4

17:15-16:25

1 stop28h 10m

£501

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 29/3

18:55-16:45

1 stop16h 50m

Cardiff Wales

Fri 10/4

09:45-18:30

1 stop13h 45m

£501

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 3/7

17:25-09:00

1 stop10h 35m

£326

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 3/7

07:10-10:15

2 stops22h 05m

£404

Flights are sorted by cheapest return flights first.

Deals found on 12/1

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, April is the cheapest month in which you can book a flight from Boston to Cardiff (average of £163). Flying from Boston to Cardiff in June is currently the most expensive (average of £790). 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 9h 40m. 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, April is the cheapest month in which you can book a flight from Boston to Cardiff (average of £163). Flying from Boston to Cardiff in June is currently the most expensive (average of £790). 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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Why should you use Cheapflights to find cheap flight tickets from Boston to Cardiff?

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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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