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Cheap flights from Cardiff to Boston from £509

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 11/1. 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 (CWL-BOS)

Cheap return flights

Virgin Atlantic Logo
17:30 - 13:25CWL-BOS
24h 55m1 stop
Virgin Atlantic Logo
13:10 - 09:50BOS-CWL
15h 40m2 stops
£509Virgin Atlantic
Find Deal
Sun, 11 Jan - Fri, 16 Jan
Delta Logo
10:20 - 22:33CWL-BOS
17h 13m2 stops
Delta Logo
13:10 - 09:50BOS-CWL
15h 40m2 stops
£537Delta
Find Deal
Sun, 11 Jan - Fri, 16 Jan
Delta Logo
09:45 - 16:30CWL-BOS
11h 45m1 stop
Delta Logo
13:25 - 09:15BOS-CWL
14h 50m2 stops
£548Delta
Find Deal
Sat, 20 Sep - Sat, 27 Sep
KLM Logo
09:45 - 20:20CWL-BOS
15h 35m2 stops
KLM Logo
13:25 - 09:15BOS-CWL
14h 50m2 stops
£556KLM
Find Deal
Sat, 20 Sep - Sat, 27 Sep
Delta Logo
10:20 - 18:55CWL-BOS
13h 35m1 stop
Delta Logo
19:10 - 16:55BOS-CWL
16h 45m1 stop
£919Delta
Find Deal
Fri, 19 Dec - Fri, 2 Jan
Delta Logo
10:20 - 18:55CWL-BOS
13h 35m1 stop
Delta Logo
19:10 - 09:50BOS-CWL
9h 40m1 stop
£920Delta
Find Deal
Fri, 19 Dec - Fri, 2 Jan
Delta Logo
10:20 - 18:55CWL-BOS
13h 35m1 stop
Delta Logo
12:25 - 09:50BOS-CWL
16h 25m2 stops
£1,017Delta
Find Deal
Fri, 19 Dec - Fri, 2 Jan
Logo
17:25 - 14:35CWL-BOS
50h 10m2 stops
Logo
20:04 - 09:50BOS-CWL
32h 46m2 stops
£1,018
Find Deal
Fri, 19 Dec - Fri, 2 Jan
Delta Logo
10:20 - 18:55CWL-BOS
13h 35m1 stop
Delta Logo
12:25 - 09:50BOS-CWL
16h 25m2 stops
£1,018Delta
Find Deal
Fri, 19 Dec - Fri, 2 Jan
Delta Logo
10:20 - 22:28CWL-BOS
17h 08m2 stops
Delta Logo
12:25 - 09:50BOS-CWL
16h 25m2 stops
£1,126Delta
Find Deal
Fri, 19 Dec - Fri, 2 Jan

Delta flights from Cardiff to Boston

Our best Delta deals on Cardiff to Boston flight tickets
Delta
11 Jan
CWL10:20Cardiff Wales
17h 13m
2 stops
BOS22:33Boston Logan Intl
16 Jan
BOS13:10Boston Logan Intl
15h 40m
2 stops
CWL09:50Cardiff Wales
£537
Find similar
Delta
20 Sept
CWL09:45Cardiff Wales
11h 45m
1 stop
BOS16:30Boston Logan Intl
27 Sept
BOS13:25Boston Logan Intl
14h 50m
2 stops
CWL09:15Cardiff Wales
£548
Find similar
Delta
19 Dec
CWL10:20Cardiff Wales
13h 35m
1 stop
BOS18:55Boston Logan Intl
2 Jan
BOS19:10Boston Logan Intl
16h 45m
1 stop
CWL16:55Cardiff Wales
£919
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 22 August 2025.
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

Sun 11/1

17:30-13:25

1 stop24h 55m

Boston Logan Intl

Fri 16/1

13:10-09:50

2 stops15h 40m

£509

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 11/1

10:20-22:33

2 stops17h 13m

Boston Logan Intl

Fri 16/1

13:10-09:50

2 stops15h 40m

£537

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 20/9

09:45-16:30

1 stop11h 45m

Boston Logan Intl

Sat 27/9

13:25-09:15

2 stops14h 50m

£548

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 20/9

09:45-20:20

2 stops15h 35m

Boston Logan Intl

Sat 27/9

13:25-09:15

2 stops14h 50m

£556

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 19/12

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Fri 2/1

19:10-16:55

1 stop16h 45m

£919

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 19/12

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Fri 2/1

19:10-09:50

1 stop9h 40m

£920

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 19/12

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Fri 2/1

12:25-09:50

2 stops16h 25m

£1,017

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 19/12

17:25-14:35

2 stops50h 10m

Boston Logan Intl

Fri 2/1

20:04-09:50

2 stops32h 46m

£1,018

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 19/12

10:20-18:55

1 stop13h 35m

Boston Logan Intl

Fri 2/1

12:25-09:50

2 stops16h 25m

£1,018

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 19/12

10:20-22:28

2 stops17h 08m

Boston Logan Intl

Fri 2/1

12:25-09:50

2 stops16h 25m

£1,126

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

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart on your flight to Boston is on a Tuesday when prices can be found for as low as £468. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around £779. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boston.

What is the cheapest time of day to depart on your flight to Boston?

Our most recent data shows that the best time of day to fly to Boston is in the morning. Flights from Cardiff to Boston during this time can be as low as £512. In the afternoon is when there is more demand to fly to Boston, so prices are often more expensive at around £678 per ticket.

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

Direct flights

None
There are no direct flights from Cardiff to Boston. There are no popular flight routes from Cardiff to Boston.
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  • 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 11h 45m.

  • 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 £440Free CancellationRating
7.8
1,388 reviews
Search KLM flights
Virgin AtlanticPriceFrom £445Free CancellationRating
7.4
658 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
Burlington
Amherst
Plymouth
Randolph
Brookline
Braintree
Needham
Revere
Falmouth
York Beach
West Yarmouth
Somerville
Warwick
Concord
Hampton
Hull
Cape Neddick
South Portland

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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