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Cheap flights from Cardiff to Boston from £374

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to Boston departing on 3/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Cardiff to Boston

Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
10:20 - 18:55
CWL
-
BOS
13h 35m1 stop
KLM Logo
20:00 - 16:55
BOS
-
CWL
15h 55m2 stops
£545KLM
Fri, 20 Feb - Fri, 27 Feb
Virgin Atlantic Logo
10:20 - 23:26
CWL
-
BOS
18h 06m2 stops
Virgin Atlantic Logo
10:03 - 09:50
BOS
-
CWL
18h 47m2 stops
£553Virgin Atlantic
Fri, 20 Feb - Fri, 27 Feb
Multiple Airlines Logo
10:20 - 18:55
CWL
-
BOS
13h 35m1 stop
Multiple Airlines Logo
19:10 - 09:50
BOS
-
CWL
9h 40m1 stop
£561Multiple Airlines
Fri, 20 Feb - Fri, 27 Feb
British Airways Logo
12:00 - 12:30
CWL
-
BOS
29h 30m2 stops
British Airways Logo
21:50 - 11:30
BOS
-
CWL
32h 40m2 stops
£572British Airways
Tue, 2 Jun - Thu, 11 Jun
Delta Logo
09:45 - 22:36
CWL
-
BOS
17h 51m2 stops
Delta Logo
20:25 - 16:45
BOS
-
CWL
15h 20m1 stop
£610Delta
Tue, 2 Jun - Thu, 11 Jun
KLM Logo
17:15 - 18:30
CWL
-
BOS
30h 15m1 stop
KLM Logo
20:25 - 16:45
BOS
-
CWL
15h 20m1 stop
£637KLM
Tue, 2 Jun - Thu, 11 Jun
Multiple Airlines Logo
10:20 - 15:50
CWL
-
BOS
34h 30m3 stops
Multiple Airlines Logo
17:35 - 19:40
BOS
-
CWL
21h 05m2 stops
£878Multiple Airlines
Fri, 20 Feb - Fri, 27 Feb
Multiple Airlines Logo
17:15 - 18:05
CWL
-
BOS
29h 50m3 stops
Multiple Airlines Logo
05:30 - 19:40
BOS
-
CWL
33h 10m3 stops
£898Multiple Airlines
Fri, 20 Feb - Fri, 27 Feb

KLM flights from Cardiff to Boston

Our best KLM deals on Cardiff to Boston flight tickets
KLM
20 Feb
CWL10:20Cardiff Wales
13h 35m
1 stop
BOS18:55Boston Logan Intl
27 Feb
BOS20:00Boston Logan Intl
15h 55m
2 stops
CWL16:55Cardiff Wales
£545
Find similar
KLM
2 Jun
CWL17:15Cardiff Wales
30h 15m
1 stop
BOS18:30Boston Logan Intl
11 Jun
BOS20:25Boston Logan Intl
15h 20m
1 stop
CWL16:45Cardiff Wales
£637
Find similar

momondo 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, momondo users made 279,928 searches. Data last updated 8 January 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

Fri 20/2

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Fri 27/2

20:00-16:55

2 stops15h 55m

£545

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 20/2

10:20-23:26

2 stops18h 06m

Boston Logan Intl

Fri 27/2

10:03-09:50

2 stops18h 47m

£553

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 20/2

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Fri 27/2

19:10-09:50

1 stop9h 40m

£561

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 2/6

12:00-12:30

2 stops29h 30m

Boston Logan Intl

Thu 11/6

21:50-11:30

2 stops32h 40m

£572

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 2/6

09:45-22:36

2 stops17h 51m

Boston Logan Intl

Thu 11/6

20:25-16:45

1 stop15h 20m

£610

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 2/6

17:15-18:30

1 stop30h 15m

Boston Logan Intl

Thu 11/6

20:25-16:45

1 stop15h 20m

£637

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 20/2

10:20-15:50

3 stops34h 30m

Boston Logan Intl

Fri 27/2

17:35-19:40

2 stops21h 05m

£878

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 20/2

17:15-18:05

3 stops29h 50m

Boston Logan Intl

Fri 27/2

05:30-19:40

3 stops33h 10m

£898

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 3/4

22:45-14:40

2 stops20h 55m

£374

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 3/4

17:45-20:45

3 stops32h 00m

£383

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Boston from

How to get the cheapest flight ticket from Cardiff to Boston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Cardiff Wales to Boston Logan Intl?

Delta is the most popular carrier operating from Cardiff Wales to Boston Logan Intl

Which airlines fly to Boston?

KLM, Aer Lingus and Virgin Atlantic are the top three most popular airlines that fly to Boston from Cardiff according to our data. KLM is the first choice among our users, with 40% of people opting to fly with this airline when travelling to Boston. Keep in mind that there are 3 different airlines that fly to Boston on a routine basis, so you have a few additional options to choose from.

When to book flights from Cardiff to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from Cardiff to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Cardiff to Boston (CWL to BOS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cardiff to Boston

Fastest flight time

13h 35m

Direct flights

None
The fastest flight from Cardiff to Boston takes 13h 35m
There are no direct flights from Cardiff to Boston. There are no popular flight routes from Cardiff to Boston.
Search flight deals

  • How far is Cardiff Wales to Boston Logan Intl by plane?

    The straight-line distance from Cardiff Wales to Boston Logan Intl is 3144.0 mi. A reasonable flight in good conditions will take 13h 35m.

  • When did momondo last update prices for flights from Cardiff Wales Airport to Boston Logan Intl Airport?

    Prices for flights from Cardiff Wales Airport to Boston Logan Intl Airport were last updated today.

  • How many operators does momondo search for flights from Cardiff Wales Airport to Boston Logan Intl Airport?

  • How old do you have to be to fly from Cardiff Wales Airport to Boston Logan Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Cardiff Wales Airport to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The required travel and health documents for your Boston Logan Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Boston Logan Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Cardiff to Boston?

Best airlines flying from Cardiff to Boston

Compare and see reviews for airlines that fly from Cardiff to Boston with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom £403Free CancellationRating
7.7
1,434 reviews
Search KLM flights
Virgin AtlanticPriceFrom £444Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Salem
Waltham
Cambridge
Amherst
Falmouth
Burlington
Plymouth
Randolph
Braintree
Revere
York Beach
Needham
Cape Neddick
Old Orchard Beach
Concord
Sandwich
Everett
Hampton
Quincy
Merrimack

Why use momondo?

Why should I use momondo to find a flight deal from Cardiff to Boston?

Finding the right flight to Boston from Cardiff is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Boston quick and easy, saving you time and money.

Can I find flights from Cardiff to Boston with flexible booking policies on momondo?

momondo does allow users to show only those flights to Boston from Cardiff which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Cardiff to Boston?

momondo helps you find the best flight between Cardiff and Boston by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Cardiff to Boston right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Boston from Cardiff. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Boston trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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