Find flights
When to book
FAQs

Cheap flights from Boston to Cardiff from £202

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CWL
13 Nov — 20 Nov1
1 adult
1 adult, Economy

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 14 October 2025.

Round-trip from

£509

One-way from

£202

Popular in

June

Cheapest in

February

Average price

£749
KLM
  • KLM
  • 26/11-3/12
  • 2 total stops
  • 40h 00m total
  • Boston to Cardiff
Search Deals
4/12
  • 4/12
  • 2 total stops
  • 36h 25m total
  • Boston to Cardiff
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£108 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 14 October 2025.

Mon 20/1010:40BOS - CWL
2 stops24h 15mMultiple Airlines
Mon 3/1123:30CWL - BOS
2 stops24h 05mMultiple Airlines
Deal found 13/10£340
Mon 20/1018:45BOS - CWL
1 stop9h 30mKLM
Mon 3/1117:15CWL - BOS
1 stop25h 05mKLM
Deal found 13/10£509
Wed 26/1109:59BOS - CWL
2 stops18h 51mVirgin Atlantic
Wed 3/1217:25CWL - BOS
1 stop24h 55mVirgin Atlantic
Deal found 12/10£512
Mon 20/1018:45BOS - CWL
1 stop17h 00mDelta
Mon 3/1110:20CWL - BOS
2 stops34h 41mDelta
Deal found 13/10£516
Thu 27/1119:10BOS - CWL
1 stop16h 35mVirgin Atlantic
Thu 4/1217:25CWL - BOS
1 stop24h 55mVirgin Atlantic
Deal found 13/10£546
Thu 27/1115:05BOS - CWL
2 stops13h 45mKLM
Thu 4/1217:25CWL - BOS
1 stop24h 55mKLM
Deal found 13/10£548
Thu 27/1115:05BOS - CWL
2 stops13h 45mMultiple Airlines
Thu 4/1210:20CWL - BOS
2 stops17h 06mMultiple Airlines
Deal found 13/10£552
Tue 14/1018:45BOS - CWL
1 stop9h 30mKLM
Mon 20/1017:15CWL - BOS
1 stop25h 25mKLM
Deal found 13/10£561
Fri 7/1119:10BOS - CWL
1 stop9h 40mKLM
Tue 11/1117:25CWL - BOS
1 stop24h 55mKLM
Deal found 13/10£603
Fri 7/1119:10BOS - CWL
1 stop9h 40mDelta
Tue 11/1110:20CWL - BOS
2 stops17h 05mDelta
Deal found 13/10£609

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 14 October 2025.
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

Wed 26/11

20:50-16:55

1 stop15h 05m

Cardiff Wales

Wed 3/12

17:25-13:20

1 stop24h 55m

£509

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 26/11

09:59-09:50

2 stops18h 51m

Cardiff Wales

Wed 3/12

17:25-13:20

1 stop24h 55m

£512

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 27/11

19:10-16:45

1 stop16h 35m

Cardiff Wales

Thu 4/12

17:25-13:20

1 stop24h 55m

£546

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 27/11

15:05-09:50

2 stops13h 45m

Cardiff Wales

Thu 4/12

10:20-22:26

2 stops17h 06m

£552

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 7/11

19:10-09:50

1 stop9h 40m

Cardiff Wales

Tue 11/11

17:25-13:20

1 stop24h 55m

£603

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 7/11

19:10-09:50

1 stop9h 40m

Cardiff Wales

Tue 11/11

10:20-22:25

2 stops17h 05m

£609

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 29/3

16:45-16:45

1 stop19h 00m

Cardiff Wales

Wed 1/4

09:50-16:30

1 stop11h 40m

£624

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 29/3

11:30-09:15

2 stops16h 45m

Cardiff Wales

Wed 1/4

17:15-16:30

1 stop28h 15m

£627

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 4/12

22:40-16:05

2 stops36h 25m

£202

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 19/1

22:40-15:30

2 stops35h 50m

£226

Flights are sorted by cheapest return flights first.

Deals found on 13/10

Showing 1-10 of 11 results
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, October is the cheapest month in which you can book a flight from Boston to Cardiff (average of £447). Flying from Boston to Cardiff in June is currently the most expensive (average of £795). 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 and Virgin Atlantic can get you from Boston to Cardiff in just under 15h 05m. Your travel time can differ by up to 3h 46m. Boston and Cardiff are separated by a distance of 3137 mi. This flight may include one or multiple stops.

  • 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, October is the cheapest month in which you can book a flight from Boston to Cardiff (average of £447). Flying from Boston to Cardiff in June is currently the most expensive (average of £795). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.