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Cheap flights from Cardiff to Boston from £303

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 10/5. 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.
Multiple Airlines Logo
23:15 - 17:35
CWL
-
BOS
23h 20m
2 stops
Multiple Airlines Logo
23:35 - 23:05
BOS
-
CWL
18h 30m
1 stop
£598Multiple Airlines
Tue, 26 May - Tue, 2 Jun
Multiple Airlines Logo
23:15 - 09:45
CWL
-
BOS
39h 30m
3 stops
Multiple Airlines Logo
18:30 - 10:15
BOS
-
CWL
34h 45m
2 stops
£629Multiple Airlines
Tue, 26 May - Tue, 2 Jun
Multiple Airlines Logo
23:15 - 17:35
CWL
-
BOS
23h 20m
2 stops
Multiple Airlines Logo
18:30 - 10:15
BOS
-
CWL
34h 45m
2 stops
£634Multiple Airlines
Tue, 26 May - Tue, 2 Jun
Multiple Airlines Logo
23:15 - 09:45
CWL
-
BOS
39h 30m
3 stops
Multiple Airlines Logo
10:35 - 23:05
BOS
-
CWL
31h 30m
3 stops
£650Multiple Airlines
Tue, 26 May - Tue, 2 Jun
Multiple Airlines Logo
21:45 - 22:39
CWL
-
BOS
29h 54m
3 stops
Multiple Airlines Logo
18:30 - 10:15
BOS
-
CWL
34h 45m
2 stops
£673Multiple Airlines
Sun, 24 May - Sun, 31 May
Multiple Airlines Logo
11:35 - 14:47
CWL
-
BOS
32h 12m
2 stops
Multiple Airlines Logo
10:05 - 22:20
BOS
-
CWL
31h 15m
2 stops
£687Multiple Airlines
Thu, 28 May - Thu, 4 Jun
Multiple Airlines Logo
21:45 - 22:39
CWL
-
BOS
29h 54m
3 stops
Multiple Airlines Logo
05:50 - 21:45
BOS
-
CWL
34h 55m
3 stops
£695Multiple Airlines
Sun, 24 May - Sun, 31 May
Multiple Airlines Logo
11:35 - 09:45
CWL
-
BOS
27h 10m
2 stops
Multiple Airlines Logo
05:50 - 22:20
BOS
-
CWL
35h 30m
3 stops
£700Multiple Airlines
Thu, 28 May - Thu, 4 Jun
KLM Logo
17:15 - 07:22
CWL
-
BOS
43h 07m
2 stops
KLM Logo
21:10 - 09:15
BOS
-
CWL
31h 05m
2 stops
£701KLM
Sun, 24 May - Sun, 31 May
Multiple Airlines Logo
17:45 - 21:05
CWL
-
BOS
32h 20m
2 stops
Multiple Airlines Logo
23:30 - 23:05
BOS
-
CWL
18h 35m
1 stop
£702Multiple Airlines
Fri, 22 May - Tue, 26 May

Air France flights from Cardiff to Boston

Our best Air France deals on Cardiff to Boston flight tickets
Air France
24 May
CWL17:15Cardiff Wales
35h 22m
2 stops
BOS23:37Boston Logan Intl
31 May
BOS16:35Boston Logan Intl
19h 10m
1 stop
CWL16:45Cardiff Wales
£731
Air France
28 May
CWL17:15Cardiff Wales
28h 10m
1 stop
BOS16:25Boston Logan Intl
4 Jun
BOS20:25Boston Logan Intl
15h 20m
1 stop
CWL16:45Cardiff Wales
£766

KLM flights from Cardiff to Boston

Our best KLM deals on Cardiff to Boston flight tickets
KLM
24 May
CWL17:15Cardiff Wales
43h 07m
2 stops
BOS07:22Boston Logan Intl
31 May
BOS21:10Boston Logan Intl
31h 05m
2 stops
CWL09:15Cardiff Wales
£701
KLM
24 May
CWL17:15Cardiff Wales
30h 15m
1 stop
BOS18:30Boston Logan Intl
31 May
BOS16:35Boston Logan Intl
11h 40m
1 stop
CWL09:15Cardiff Wales
£763
KLM
22 May
CWL17:15Cardiff Wales
28h 10m
1 stop
BOS16:25Boston Logan Intl
26 May
BOS16:35Boston Logan Intl
11h 40m
1 stop
CWL09:15Cardiff Wales
£764

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 13 April 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
Fastest return journey

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 26/5

23:15-17:35

2 stops23h 20m

Boston Logan Intl

Tue 2/6

23:35-23:05

1 stop18h 30m

£598

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 26/5

23:15-09:45

3 stops39h 30m

Boston Logan Intl

Tue 2/6

18:30-10:15

2 stops34h 45m

£629

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 26/5

23:15-17:35

2 stops23h 20m

Boston Logan Intl

Tue 2/6

18:30-10:15

2 stops34h 45m

£634

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 26/5

23:15-09:45

3 stops39h 30m

Boston Logan Intl

Tue 2/6

10:35-23:05

3 stops31h 30m

£650

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 24/5

21:45-22:39

3 stops29h 54m

Boston Logan Intl

Sun 31/5

18:30-10:15

2 stops34h 45m

£673

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 28/5

11:35-14:47

2 stops32h 12m

Boston Logan Intl

Thu 4/6

10:05-22:20

2 stops31h 15m

£687

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 24/5

21:45-22:39

3 stops29h 54m

Boston Logan Intl

Sun 31/5

05:50-21:45

3 stops34h 55m

£695

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 28/5

11:35-09:45

2 stops27h 10m

Boston Logan Intl

Thu 4/6

05:50-22:20

3 stops35h 30m

£700

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 24/5

17:15-07:22

2 stops43h 07m

Boston Logan Intl

Sun 31/5

21:10-09:15

2 stops31h 05m

£701

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 22/5

17:45-21:05

2 stops32h 20m

Boston Logan Intl

Tue 26/5

23:30-23:05

1 stop18h 35m

£702

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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?

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 35% 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

23h 20m

Direct flights

None
The fastest flight from Cardiff to Boston takes 23h 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 23h 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 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 £404Free CancellationRating
7.8
1,496 reviews
Search KLM flights
Virgin AtlanticPriceFrom £445Free CancellationRating
7.5
687 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
Cambridge
Waltham
Amherst
Brookline
Falmouth
Chelsea
Burlington
Randolph
Braintree
York Beach
Quincy
Needham
Foxborough
Concord
Plymouth
Cape Neddick
Everett
Old Orchard Beach
Revere

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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