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Cheap flights from Cardiff to Boston from £565

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
16 Mar — 23 Mar1
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 14 February 2026.

Mon 2/310:20
CWL
-
BOS
1 stop13h 35m
Delta
Mon 9/317:15
BOS
-
CWL
2 stops12h 35m
Delta
Deal found 14/2£565
Fri 13/310:20
CWL
-
BOS
1 stop13h 35m
Delta
Mon 16/320:10
BOS
-
CWL
1 stop9h 40m
Delta
Deal found 11/2£572
Tue 31/321:45
CWL
-
BOS
2 stops28h 20m
Multiple Airlines
Tue 7/417:20
BOS
-
CWL
1 stop25h 05m
Multiple Airlines
Deal found 14/2£573
Tue 1/909:45
CWL
-
BOS
1 stop32h 34m
Delta
Wed 2/1213:10
BOS
-
CWL
2 stops22h 45m
Delta
Deal found 13/2£581
Sun 29/321:45
CWL
-
BOS
2 stops52h 20m
Multiple Airlines
Sun 5/417:20
BOS
-
CWL
1 stop23h 40m
Multiple Airlines
Deal found 12/2£585
Tue 1/909:45
CWL
-
BOS
1 stop32h 34m
Delta
Mon 30/1105:30
BOS
-
CWL
2 stops23h 20m
Delta
Deal found 13/2£589
Tue 31/309:45
CWL
-
BOS
1 stop32h 28m
KLM
Tue 7/416:35
BOS
-
CWL
1 stop11h 40m
KLM
Deal found 14/2£594
Tue 1/909:45
CWL
-
BOS
1 stop32h 34m
Delta
Sun 29/1120:50
BOS
-
CWL
1 stop32h 00m
Delta
Deal found 13/2£611
Tue 31/309:45
CWL
-
BOS
2 stops18h 09m
Delta
Tue 7/411:30
BOS
-
CWL
2 stops16h 45m
Delta
Deal found 14/2£616
Tue 1/909:45
CWL
-
BOS
1 stop32h 34m
Delta
Tue 1/1206:00
BOS
-
CWL
2 stops22h 50m
Delta
Deal found 13/2£685

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 14 February 2026.

Round-trip from

£570

Popular in

August

Cheapest in

June
KLM
  • KLM
  • 13/3-16/3
  • 2 total stops
  • 23h 15m total
  • Cardiff to Boston
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£69 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).
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 14 February 2026.
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

Mon 2/3

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Mon 9/3

20:10-16:55

1 stop16h 45m

£565

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 13/3

10:20-19:55

1 stop13h 35m

Boston Logan Intl

Mon 16/3

20:10-09:50

1 stop9h 40m

£572

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 31/3

21:45-21:05

2 stops28h 20m

Boston Logan Intl

Tue 7/4

17:20-23:25

1 stop25h 05m

£573

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 29/3

21:45-21:05

2 stops52h 20m

Boston Logan Intl

Sun 5/4

17:20-22:00

1 stop23h 40m

£585

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 31/3

09:45-13:13

1 stop32h 28m

Boston Logan Intl

Tue 7/4

16:35-09:15

1 stop11h 40m

£594

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 31/3

09:45-22:54

2 stops18h 09m

Boston Logan Intl

Tue 7/4

11:30-09:15

2 stops16h 45m

£616

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 14/3

17:25-22:54

2 stops33h 29m

Boston Logan Intl

Sat 21/3

23:15-09:50

2 stops30h 35m

£732

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 9/7

12:00-20:05

2 stops13h 05m

£571

Flights are sorted by cheapest return flights first.

Deals found on 14/2

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 £349). Flying from Cardiff to Boston in April is currently the most expensive (average of £463). 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 14 February 2026.
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
1,454 reviews
Check prices

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,454 reviews
KLM
7.7
Good
1,454 reviews
Check prices

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,454 reviews
Check prices

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 Delta fly from Cardiff to Boston in about 13h 35m. The time it takes to get you to your destination can typically vary by up to . The distance from Cardiff to Boston is about 3137 mi.

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

    Cheapflights users have booked flights from Cardiff to Boston round-trip from £399. Another airline that can offer you cheap pricing is Virgin Atlantic. KLM is currently priced 32% 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 £349). Flying from Cardiff to Boston in April is currently the most expensive (average of £463). 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
Canton
Warwick
Cambridge
Peabody
Somerville
Quincy
Waltham
Chelmsford

Browse thousands of different options on Cheapflights for your next trip

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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 14 February 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£399Average£529FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£439Average£683FlexibilityNo 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.

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