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Cheap flights from Cardiff to Boston from £569

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to Boston departing on 23/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
17:15 - 07:15
CWL
-
BOS
42h 00m
2 stops
KLM Logo
20:25 - 09:15
BOS
-
CWL
31h 50m
1 stop
£569KLM
Mon, 23 Mar - Mon, 30 Mar
KLM Logo
17:15 - 22:54
CWL
-
BOS
33h 39m
2 stops
KLM Logo
13:55 - 09:15
BOS
-
CWL
14h 20m
2 stops
£570KLM
Mon, 23 Mar - Mon, 30 Mar
Multiple Airlines Logo
23:30 - 15:35
CWL
-
BOS
44h 05m
2 stops
Multiple Airlines Logo
21:15 - 22:50
BOS
-
CWL
20h 35m
1 stop
£581Multiple Airlines
Mon, 23 Mar - Mon, 30 Mar
Air France Logo
10:20 - 19:55
CWL
-
BOS
13h 35m
1 stop
Air France Logo
20:25 - 16:45
BOS
-
CWL
15h 20m
1 stop
£583Air France
Wed, 25 Mar - Wed, 1 Apr
Multiple Airlines Logo
15:55 - 21:20
CWL
-
BOS
33h 25m
2 stops
Multiple Airlines Logo
20:05 - 22:25
BOS
-
CWL
21h 20m
2 stops
£588Multiple Airlines
Wed, 25 Mar - Wed, 1 Apr
Delta Logo
10:20 - 22:54
CWL
-
BOS
16h 34m
2 stops
Delta Logo
20:25 - 16:45
BOS
-
CWL
15h 20m
1 stop
£599Delta
Wed, 25 Mar - Wed, 1 Apr
Multiple Airlines Logo
17:15 - 14:20
CWL
-
BOS
25h 05m
1 stop
Multiple Airlines Logo
16:35 - 09:15
BOS
-
CWL
11h 40m
1 stop
£617Multiple Airlines
Mon, 23 Mar - Mon, 30 Mar
Multiple Airlines Logo
09:25 - 14:55
CWL
-
BOS
10h 30m
1 stop
Multiple Airlines Logo
23:30 - 21:20
BOS
-
CWL
16h 50m
1 stop
£687Multiple Airlines
Sat, 30 May - Sat, 13 Jun
Multiple Airlines Logo
09:25 - 22:39
CWL
-
BOS
18h 14m
2 stops
Multiple Airlines Logo
16:45 - 10:15
BOS
-
CWL
36h 30m
2 stops
£722Multiple Airlines
Sat, 30 May - Sat, 13 Jun
Multiple Airlines Logo
09:25 - 09:45
CWL
-
BOS
29h 20m
3 stops
Multiple Airlines Logo
16:45 - 10:15
BOS
-
CWL
36h 30m
2 stops
£744Multiple Airlines
Sat, 30 May - Sat, 13 Jun

KLM flights from Cardiff to Boston

Our best KLM deals on Cardiff to Boston flight tickets
KLM
23 Mar
CWL17:15Cardiff Wales
42h 00m
2 stops
BOS07:15Boston Logan Intl
30 Mar
BOS20:25Boston Logan Intl
31h 50m
1 stop
CWL09:15Cardiff Wales
£569
KLM
23 Mar
CWL17:15Cardiff Wales
33h 39m
2 stops
BOS22:54Boston Logan Intl
30 Mar
BOS13:55Boston Logan Intl
14h 20m
2 stops
CWL09:15Cardiff Wales
£570

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 February 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

Mon 23/3

17:15-07:15

2 stops42h 00m

Boston Logan Intl

Mon 30/3

20:25-09:15

1 stop31h 50m

£569

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 23/3

17:15-22:54

2 stops33h 39m

Boston Logan Intl

Mon 30/3

13:55-09:15

2 stops14h 20m

£570

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 23/3

23:30-15:35

2 stops44h 05m

Boston Logan Intl

Mon 30/3

21:15-22:50

1 stop20h 35m

£581

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 25/3

10:20-19:55

1 stop13h 35m

Boston Logan Intl

Wed 1/4

20:25-16:45

1 stop15h 20m

£583

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 25/3

15:55-21:20

2 stops33h 25m

Boston Logan Intl

Wed 1/4

20:05-22:25

2 stops21h 20m

£588

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 25/3

10:20-22:54

2 stops16h 34m

Boston Logan Intl

Wed 1/4

20:25-16:45

1 stop15h 20m

£599

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 23/3

17:15-14:20

1 stop25h 05m

Boston Logan Intl

Mon 30/3

16:35-09:15

1 stop11h 40m

£617

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 30/5

09:25-14:55

1 stop10h 30m

Boston Logan Intl

Sat 13/6

23:30-21:20

1 stop16h 50m

£687

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 30/5

09:25-22:39

2 stops18h 14m

Boston Logan Intl

Sat 13/6

16:45-10:15

2 stops36h 30m

£722

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 30/5

09:25-09:45

3 stops29h 20m

Boston Logan Intl

Sat 13/6

16:45-10:15

2 stops36h 30m

£744

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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?

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 38% 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

33h 39m

Direct flights

None
The fastest flight from Cardiff to Boston takes 33h 39m
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 33h 39m.

  • 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 £400Free CancellationRating
7.7
1,450 reviews
Search KLM flights
Virgin AtlanticPriceFrom £440Free 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
Brookline
Falmouth
Plymouth
Burlington
Randolph
Braintree
Revere
York Beach
Needham
Foxborough
Cape Neddick
Old Orchard Beach
Sandwich
Concord
Everett
Quincy

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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