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Cheap flights from Cardiff to Boston from £266

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
1 Apr — 8 Apr1
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 2 March 2026.

Thu 16/422:50
CWL
-
BOS
2 stops27h 15m
Multiple Airlines
Mon 20/423:30
BOS
-
CWL
1 stop18h 20m
Multiple Airlines
Deal found 27/2£511
Wed 15/423:50
CWL
-
BOS
2 stops26h 15m
Multiple Airlines
Wed 22/421:15
BOS
-
CWL
1 stop20h 10m
Multiple Airlines
Deal found 1/3£540
Wed 15/409:45
CWL
-
BOS
1 stop11h 40m
KLM
Wed 22/416:35
BOS
-
CWL
1 stop11h 40m
KLM
Deal found 1/3£544
Wed 15/409:45
CWL
-
BOS
2 stops19h 07m
Virgin Atlantic
Wed 22/405:30
BOS
-
CWL
2 stops22h 45m
Virgin Atlantic
Deal found 1/3£572
Thu 16/417:15
CWL
-
BOS
1 stop24h 58m
Air France
Mon 20/420:25
BOS
-
CWL
1 stop15h 20m
Air France
Deal found 27/2£574
Sun 29/321:45
CWL
-
BOS
2 stops25h 45m
Multiple Airlines
Sun 5/420:25
BOS
-
CWL
2 stops20h 35m
Multiple Airlines
Deal found 27/2£592
Thu 16/409:45
CWL
-
BOS
2 stops19h 07m
Delta
Mon 20/412:30
BOS
-
CWL
2 stops15h 45m
Delta
Deal found 27/2£607
Wed 1/423:50
CWL
-
BOS
2 stops25h 30m
Multiple Airlines
Wed 8/420:50
BOS
-
CWL
2 stops20h 35m
Multiple Airlines
Deal found 2/3£648
Sat 28/320:05
CWL
-
BOS
1 stop24h 59m
Multiple Airlines
Sat 4/423:30
BOS
-
CWL
1 stop16h 50m
Multiple Airlines
Deal found 28/2£656

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 2 March 2026.

Round-trip from

£511

One-way from

£266

Popular in

August

Cheapest in

June

Average price

£456
16/4-20/4
  • 16/4-20/4
  • 3 total stops
  • 45h 35m total
  • Cardiff to Boston
Search Deals
13/5
  • 13/5
  • 3 total stops
  • 38h 15m total
  • Cardiff to Boston
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£71 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
Average for round-trip flights in March 2026
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 2 March 2026.
Use the filters below to find and compare flights from Cardiff to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 16/4

22:50-21:05

2 stops27h 15m

Boston Logan Intl

Mon 20/4

23:30-22:50

1 stop18h 20m

£511

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 15/4

23:50-21:05

2 stops26h 15m

Boston Logan Intl

Wed 22/4

21:15-22:25

1 stop20h 10m

£540

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 15/4

09:45-23:52

2 stops19h 07m

Boston Logan Intl

Wed 22/4

05:30-09:15

2 stops22h 45m

£572

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 16/4

17:15-13:13

1 stop24h 58m

Boston Logan Intl

Mon 20/4

20:25-16:45

1 stop15h 20m

£574

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 29/3

21:45-18:30

2 stops25h 45m

Boston Logan Intl

Sun 5/4

20:25-22:00

2 stops20h 35m

£592

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 16/4

09:45-23:52

2 stops19h 07m

Boston Logan Intl

Mon 20/4

12:30-09:15

2 stops15h 45m

£607

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 1/4

23:50-20:20

2 stops25h 30m

Boston Logan Intl

Wed 8/4

21:15-22:25

1 stop20h 10m

£649

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 29/3

17:15-18:30

1 stop30h 15m

Boston Logan Intl

Sun 5/4

16:35-16:45

1 stop19h 10m

£785

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 13/5

23:50-09:05

3 stops38h 15m

£266

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 12/5

23:15-22:00

1 stop27h 45m

£387

Flights are sorted by cheapest return flights first.

Deals found on 2/3

Sorted by cheapest first

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 £352). Flying from Cardiff to Boston in April is currently the most expensive (average of £469). 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 2 March 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
1,461 reviews
Check prices

Overall

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,461 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Overall

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
680 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Overall

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 Virgin Atlantic and Air France fly from Cardiff to Boston in about 19h 07m. The time it takes to get you to your destination can typically vary by up to 5h 51m. 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 £403. 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 £352). Flying from Cardiff to Boston in April is currently the most expensive (average of £469). 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

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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
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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 2 March 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£403Average£534FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£444Average£690FlexibilityNo 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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