Find flights
When to book
Airlines
FAQs

Cheap flights from Cardiff to Boston from £392

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 21/12. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
2 Jan — 9 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to Boston

Enter your travel dates to find the best prices.

Cheapest flights from Cardiff to Boston
Explore the most affordable flight options available from Cardiff to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 December 2025.

Fri 26/1217:15CWL - BOS
1 stop25h 05mKLM
Sun 4/120:50BOS - CWL
1 stop32h 00mKLM
Deal found 30/11£862
Fri 26/1210:20CWL - BOS
2 stops18h 37mMultiple Airlines
Sun 4/120:50BOS - CWL
1 stop32h 00mMultiple Airlines
Deal found 30/11£918
Tue 30/1222:00CWL - BOS
2 stops26h 50mMultiple Airlines
Tue 6/117:10BOS - CWL
1 stop17h 20mMultiple Airlines
Deal found 2/12£1,018
Fri 19/1210:20CWL - BOS
1 stop13h 35mVirgin Atlantic
Fri 2/120:50BOS - CWL
1 stop31h 55mVirgin Atlantic
Deal found 1/12£1,076
Fri 19/1210:20CWL - BOS
1 stop13h 35mKLM
Fri 2/120:50BOS - CWL
1 stop15h 05mKLM
Deal found 2/12£1,142

Find flight deals from Cardiff to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Boston (BOS). 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 3 December 2025.

Round-trip from

£433

One-way from

£392

Popular in

August

Cheapest in

June

Average price

£634
16/1-23/1
  • 16/1-23/1
  • 3 total stops
  • 44h 55m total
  • Cardiff to Boston
Search Deals
21/12
  • 21/12
  • 3 total stops
  • 49h 20m total
  • Cardiff to Boston
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£89 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to Boston 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 3 December 2025.
Use the filters below to find and compare flights from Cardiff to Boston that are best for you.

Fly from

Cardiff

Fly to

Boston

Route

Depart

Return

Price

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 16/1

22:25-20:55

2 stops27h 30m

Boston Logan Intl

Fri 23/1

21:15-19:40

1 stop17h 25m

£433

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 15/1

17:25-17:50

3 stops29h 25m

Boston Logan Intl

Thu 22/1

19:50-22:00

2 stops21h 10m

£476

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 13/1

10:20-13:30

1 stop32h 10m

Boston Logan Intl

Tue 20/1

19:10-16:55

1 stop16h 45m

£485

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 15/1

17:25-15:53

2 stops27h 28m

Boston Logan Intl

Thu 22/1

13:00-09:50

2 stops15h 50m

£519

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 21/1

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Sun 25/1

20:50-09:50

2 stops32h 00m

£529

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 16/1

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Fri 23/1

19:10-09:50

1 stop9h 40m

£545

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 21/12

18:25-14:45

3 stops49h 20m

£392

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 30/12

16:45-19:50

2 stops32h 05m

£953

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 30/12

17:25-13:20

1 stop24h 55m

£1,419

Flights are sorted by cheapest return flights first.

Deals found on 2/12

Best time to book a flight from Cardiff to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Cardiff 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 Cardiff to Boston

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

Currently, March is the cheapest month in which you can book a flight from Cardiff to Boston (average of £406). Flying from Cardiff to Boston in April is currently the most expensive (average of £475). 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.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated 3 December 2025.
See what other customers who have flown with KLM and Virgin Atlantic from Cardiff to Boston have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,426 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Food

7.2

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,426 reviews
KLM
7.7
Good
1,426 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Food

7.2

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
675 reviews
KLM
7.7
Good
1,426 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Comfort

7.6

Food

7.2

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Boston. 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 Cardiff to Boston?

    Airlines like KLM and Virgin Atlantic fly from Cardiff to Boston in about 27h 28m. The time it takes to get you to your destination can typically vary by up to 4h 42m. The distance from Cardiff to Boston is about 3137 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Cardiff to Boston round-trip?

    Cheapflights users have booked flights from Cardiff to Boston round-trip from £451. Another airline that can offer you cheap pricing is Virgin Atlantic. KLM is currently priced 22% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Cardiff to Boston 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 Cardiff to Boston?

    Currently, March is the cheapest month in which you can book a flight from Cardiff to Boston (average of £406). Flying from Cardiff to Boston in April is currently the most expensive (average of £475). 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 Boston?

Book flights to Boston if you plan to visit one of these locations
Burlington
Cambridge
Peabody
Somerville
Quincy
Waltham
Chelmsford

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.

Alternative routes for Cardiff to Boston

See prices for flight routes from nearby airports that may be better suited for you.
Manchester to Boston flights
Bristol to Boston flights
Manchester to Hartford flights
Bristol to Hartford flights
Cardiff to Hartford flights
Manchester to Worcester flights

Top 2 airlines flying from Cardiff to Boston

Discover the top 2 airlines that operate flights from Cardiff to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 December 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£451Average£494FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£453Average£704FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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 Cardiff to Boston?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Cardiff to Boston. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Boston from Cardiff.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Cardiff to Boston, users can toggle the no change fees filter when performing a flight search.

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

Yes! Start tracking prices for Cardiff to Boston flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your 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.