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Cheap flights from Cardiff to Boston from £304

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 20/9. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Cardiff to Boston

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:35 - 18:35
CWL
-
BOS
12h 00m
1 stop
Multiple Airlines Logo
19:30 - 10:15
BOS
-
CWL
33h 45m
1 stop
£536Multiple Airlines
週二, 1 9月 - 週二, 8 9月
Multiple Airlines Logo
23:15 - 22:38
CWL
-
BOS
28h 23m
3 stops
Multiple Airlines Logo
10:40 - 23:25
BOS
-
CWL
31h 45m
3 stops
£573Multiple Airlines
週二, 1 9月 - 週二, 8 9月
Multiple Airlines Logo
22:45 - 19:15
CWL
-
BOS
25h 30m
2 stops
Multiple Airlines Logo
17:25 - 06:55
BOS
-
CWL
8h 30m
1 stop
£588Multiple Airlines
週五, 4 9月 - 週五, 11 9月
KLM Logo
09:45 - 16:35
CWL
-
BOS
11h 50m
1 stop
KLM Logo
20:25 - 09:15
BOS
-
CWL
31h 50m
1 stop
£600KLM
週五, 4 9月 - 週五, 11 9月
Multiple Airlines Logo
22:45 - 19:15
CWL
-
BOS
25h 30m
2 stops
Multiple Airlines Logo
23:40 - 22:00
BOS
-
CWL
17h 20m
1 stop
£603Multiple Airlines
週五, 21 8月 - 週日, 30 8月
Multiple Airlines Logo
23:15 - 09:05
CWL
-
BOS
38h 50m
2 stops
Multiple Airlines Logo
17:25 - 23:25
BOS
-
CWL
25h 00m
1 stop
£610Multiple Airlines
週二, 1 9月 - 週二, 8 9月
Multiple Airlines Logo
11:35 - 18:35
CWL
-
BOS
12h 00m
1 stop
Multiple Airlines Logo
10:40 - 23:25
BOS
-
CWL
31h 45m
3 stops
£622Multiple Airlines
週二, 1 9月 - 週二, 8 9月
Virgin Atlantic Logo
09:45 - 19:16
CWL
-
BOS
38h 31m
2 stops
Virgin Atlantic Logo
06:05 - 17:05
BOS
-
CWL
30h 00m
2 stops
£640Virgin Atlantic
週五, 4 9月 - 週五, 11 9月
Multiple Airlines Logo
22:45 - 09:05
CWL
-
BOS
39h 20m
2 stops
Multiple Airlines Logo
23:40 - 22:00
BOS
-
CWL
17h 20m
1 stop
£646Multiple Airlines
週五, 21 8月 - 週日, 30 8月
Multiple Airlines Logo
22:45 - 19:15
CWL
-
BOS
25h 30m
2 stops
Multiple Airlines Logo
21:15 - 22:00
BOS
-
CWL
19h 45m
1 stop
£685Multiple Airlines
週五, 21 8月 - 週日, 30 8月

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KLM flights from Cardiff to Boston

Our best KLM deals on Cardiff to Boston flight tickets
KLM
4 Sept
CWL09:45Cardiff Wales
11h 50m
1 stop
BOS16:35Boston Logan Intl
11 Sept
BOS20:25Boston Logan Intl
31h 50m
1 stop
CWL09:15Cardiff Wales
£600
KLM
21 Aug
CWL09:45Cardiff Wales
26h 40m
2 stops
BOS07:25Boston Logan Intl
30 Aug
BOS16:15Boston Logan Intl
36h 00m
2 stops
CWL09:15Cardiff Wales
£719
KLM
8 Aug
CWL09:50Cardiff Wales
17h 53m
2 stops
BOS22:43Boston Logan Intl
11 Aug
BOS09:05Boston Logan Intl
19h 10m
2 stops
CWL09:15Cardiff Wales
£784

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 22 7月 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

Cheapest return flight

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週二 1/9

11:35-18:35

1 stop12h 00m

Boston Logan Intl

週二 8/9

19:30-10:15

1 stop33h 45m

£536

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週二 1/9

23:15-22:38

3 stops28h 23m

Boston Logan Intl

週二 8/9

10:40-23:25

3 stops31h 45m

£573
Fastest return journey

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週五 4/9

22:45-19:15

2 stops25h 30m

Boston Logan Intl

週五 11/9

17:25-06:55

1 stop8h 30m

£588

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週五 4/9

09:45-16:35

1 stop11h 50m

Boston Logan Intl

週五 11/9

20:25-09:15

1 stop31h 50m

£600

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週五 21/8

22:45-19:15

2 stops25h 30m

Boston Logan Intl

週日 30/8

23:40-22:00

1 stop17h 20m

£603

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週二 1/9

23:15-09:05

2 stops38h 50m

Boston Logan Intl

週二 8/9

17:25-23:25

1 stop25h 00m

£610

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週二 1/9

11:35-18:35

1 stop12h 00m

Boston Logan Intl

週二 8/9

10:40-23:25

3 stops31h 45m

£622

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週五 4/9

09:45-19:16

2 stops38h 31m

Boston Logan Intl

週五 11/9

06:05-17:05

2 stops30h 00m

£640

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週五 21/8

22:45-09:05

2 stops39h 20m

Boston Logan Intl

週日 30/8

23:40-22:00

1 stop17h 20m

£646

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

週五 21/8

22:45-19:15

2 stops25h 30m

Boston Logan Intl

週日 30/8

21:15-22:00

1 stop19h 45m

£685

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 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

Which airlines fly to Boston?

Aer Lingus, KLM and British Airways are the top three most popular airlines that fly to Boston from Cardiff according to our data. Aer Lingus is the first choice among our users, with 55% of people opting to fly with this airline when travelling to Boston. Keep in mind that there are 4 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

25h 30m

Direct flights

None
The fastest flight from Cardiff to Boston takes 25h 30m
There are no direct flights from Cardiff to Boston. There are no popular flight routes from Cardiff to Boston.
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Frequently asked questions about flying from Cardiff to Boston

  • 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 25h 30m.

  • 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 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.

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Salem
Cambridge
Waltham
Braintree
Dedham
Chelsea
Brookline
Plymouth
Foxborough
Falmouth
Burlington
Marlborough
Randolph
York Beach
Needham
Quincy
Wells
Amherst
Everett
Sandwich

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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週五 21/8
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