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Cheap flights from Cardiff to Boston from £239

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 18/9. 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
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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 - 10:30
CWL
-
BOS
27h 55m
1 stop
Multiple Airlines Logo
19:30 - 10:15
BOS
-
CWL
33h 45m
1 stop
£528Multiple Airlines
Mon, 31 Aug - Sun, 6 Sep
Multiple Airlines Logo
11:35 - 19:50
CWL
-
BOS
13h 15m
1 stop
Multiple Airlines Logo
23:00 - 21:45
BOS
-
CWL
17h 45m
3 stops
£604Multiple Airlines
Mon, 31 Aug - Sun, 6 Sep
Multiple Airlines Logo
11:35 - 19:50
CWL
-
BOS
13h 15m
1 stop
Multiple Airlines Logo
19:30 - 21:45
BOS
-
CWL
21h 15m
2 stops
£627Multiple Airlines
Mon, 31 Aug - Sun, 6 Sep
Multiple Airlines Logo
22:10 - 09:05
CWL
-
BOS
39h 55m
2 stops
Multiple Airlines Logo
23:40 - 22:50
BOS
-
CWL
18h 10m
1 stop
£636Multiple Airlines
Mon, 17 Aug - Mon, 24 Aug
Multiple Airlines Logo
11:35 - 21:27
CWL
-
BOS
14h 52m
2 stops
Multiple Airlines Logo
23:00 - 21:45
BOS
-
CWL
17h 45m
3 stops
£664Multiple Airlines
Mon, 31 Aug - Sun, 6 Sep
Multiple Airlines Logo
22:10 - 18:50
CWL
-
BOS
25h 40m
2 stops
Multiple Airlines Logo
17:25 - 22:50
BOS
-
CWL
24h 25m
1 stop
£667Multiple Airlines
Mon, 10 Aug - Tue, 18 Aug
Multiple Airlines Logo
22:10 - 18:50
CWL
-
BOS
25h 40m
2 stops
Multiple Airlines Logo
17:25 - 22:50
BOS
-
CWL
24h 25m
1 stop
£676Multiple Airlines
Mon, 3 Aug - Mon, 10 Aug
Multiple Airlines Logo
11:35 - 09:45
CWL
-
BOS
27h 10m
2 stops
Multiple Airlines Logo
20:50 - 22:50
BOS
-
CWL
21h 00m
2 stops
£694Multiple Airlines
Mon, 17 Aug - Mon, 24 Aug
Multiple Airlines Logo
22:10 - 16:55
CWL
-
BOS
23h 45m
2 stops
Multiple Airlines Logo
19:35 - 22:50
BOS
-
CWL
22h 15m
2 stops
£723Multiple Airlines
Mon, 10 Aug - Tue, 18 Aug
Multiple Airlines Logo
09:00 - 20:20
CWL
-
BOS
16h 20m
2 stops
Multiple Airlines Logo
23:40 - 21:45
BOS
-
CWL
17h 05m
1 stop
£731Multiple Airlines
Thu, 13 Aug - Sun, 16 Aug

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KLM flights from Cardiff to Boston

Our best KLM deals on Cardiff to Boston flight tickets
KLM
13 Aug
CWL09:45Cardiff Wales
11h 52m
1 stop
BOS16:37Boston Logan Intl
16 Aug
BOS16:45Boston Logan Intl
11h 30m
1 stop
CWL09:15Cardiff Wales
£756
KLM
13 Aug
CWL09:45Cardiff Wales
11h 52m
1 stop
BOS16:37Boston Logan Intl
16 Aug
BOS16:45Boston Logan Intl
11h 30m
1 stop
CWL09:15Cardiff Wales
£776

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 July 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

Mon 31/8

11:35-10:30

1 stop27h 55m

Boston Logan Intl

Sun 6/9

19:30-10:15

1 stop33h 45m

£528
Fastest return journey

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 31/8

11:35-19:50

1 stop13h 15m

Boston Logan Intl

Sun 6/9

23:00-21:45

3 stops17h 45m

£604

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 31/8

11:35-19:50

1 stop13h 15m

Boston Logan Intl

Sun 6/9

19:30-21:45

2 stops21h 15m

£627

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 17/8

22:10-09:05

2 stops39h 55m

Boston Logan Intl

Mon 24/8

23:40-22:50

1 stop18h 10m

£636

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 31/8

11:35-21:27

2 stops14h 52m

Boston Logan Intl

Sun 6/9

23:00-21:45

3 stops17h 45m

£664

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 10/8

22:10-18:50

2 stops25h 40m

Boston Logan Intl

Tue 18/8

17:25-22:50

1 stop24h 25m

£667

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 3/8

22:10-18:50

2 stops25h 40m

Boston Logan Intl

Mon 10/8

17:25-22:50

1 stop24h 25m

£676

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 17/8

11:35-09:45

2 stops27h 10m

Boston Logan Intl

Mon 24/8

20:50-22:50

2 stops21h 00m

£694

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 10/8

22:10-16:55

2 stops23h 45m

Boston Logan Intl

Tue 18/8

19:35-22:50

2 stops22h 15m

£723

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 13/8

09:00-20:20

2 stops16h 20m

Boston Logan Intl

Sun 16/8

23:40-21:45

1 stop17h 05m

£731

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 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 Virgin Atlantic 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 50% 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

16h 20m

Direct flights

None
The fastest flight from Cardiff to Boston takes 16h 20m
There are no direct flights from Cardiff to Boston. There are no popular flight routes from Cardiff to Boston.
Search flight deals

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 16h 20m.

  • 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
Brookline
Plymouth
Foxborough
Burlington
Falmouth
Chelsea
Randolph
York Beach
Needham
Quincy
Amherst
Wells
Everett
Sandwich
Cape Neddick

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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