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Cheap flights from Boston to Cardiff from £551

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Cardiff departing on 30/11. 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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Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
19:10 - 16:45BOS-CWL
16h 35m1 stop
Delta Logo
10:20 - 18:55CWL-BOS
13h 35m1 stop
£551Delta
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Sun, 30 Nov - Sun, 7 Dec
Multiple Airlines Logo
19:10 - 16:45BOS-CWL
16h 35m1 stop
Multiple Airlines Logo
10:20 - 18:59CWL-BOS
13h 39m2 stops
£560Multiple Airlines
Find Deal
Sun, 30 Nov - Sun, 7 Dec
Multiple Airlines Logo
19:10 - 16:45BOS-CWL
16h 35m1 stop
Multiple Airlines Logo
10:20 - 13:20CWL-BOS
32h 00m1 stop
£620Multiple Airlines
Find Deal
Thu, 27 Nov - Mon, 1 Dec
Delta Logo
20:20 - 09:15BOS-CWL
31h 55m1 stop
Delta Logo
09:50 - 18:25CWL-BOS
13h 35m1 stop
£629Delta
Find Deal
Sun, 29 Mar - Wed, 1 Apr
Delta Logo
20:20 - 16:45BOS-CWL
15h 25m1 stop
Delta Logo
09:50 - 16:30CWL-BOS
11h 40m1 stop
£631Delta
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Sun, 29 Mar - Wed, 1 Apr
Air France Logo
20:45 - 16:45BOS-CWL
39h 00m2 stops
Air France Logo
09:50 - 23:38CWL-BOS
18h 48m2 stops
£633Air France
Find Deal
Sun, 29 Mar - Wed, 1 Apr
Air France Logo
20:45 - 16:45BOS-CWL
39h 00m2 stops
Air France Logo
09:50 - 00:59CWL-BOS
20h 09m2 stops
£634Air France
Find Deal
Sun, 29 Mar - Wed, 1 Apr
Multiple Airlines Logo
20:50 - 21:20BOS-CWL
19h 30m2 stops
Multiple Airlines Logo
16:15 - 20:45CWL-BOS
33h 30m3 stops
£642Multiple Airlines
Find Deal
Sat, 11 Apr - Tue, 21 Apr
KLM Logo
22:20 - 16:45BOS-CWL
13h 25m2 stops
KLM Logo
09:50 - 16:30CWL-BOS
11h 40m1 stop
£824KLM
Find Deal
Sat, 11 Apr - Tue, 21 Apr
KLM Logo
16:45 - 09:15BOS-CWL
11h 30m1 stop
KLM Logo
09:50 - 16:30CWL-BOS
11h 40m1 stop
£956KLM
Find Deal
Sat, 11 Apr - Tue, 21 Apr

Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets
Delta
30 Nov
BOS19:10Boston Logan Intl
16h 35m
1 stop
CWL16:45Cardiff Wales
7 Dec
CWL10:20Cardiff Wales
13h 35m
1 stop
BOS18:55Boston Logan Intl
£551
Find similar
Delta
29 Mar
BOS20:20Boston Logan Intl
31h 55m
1 stop
CWL09:15Cardiff Wales
1 Apr
CWL09:50Cardiff Wales
13h 35m
1 stop
BOS18:25Boston Logan Intl
£629
Find similar
Delta
29 Mar
BOS20:20Boston Logan Intl
15h 25m
1 stop
CWL16:45Cardiff Wales
1 Apr
CWL09:50Cardiff Wales
11h 40m
1 stop
BOS16:30Boston Logan Intl
£631
Find similar

Air France flights from Boston to Cardiff

Our best Air France deals on Boston to Cardiff flight tickets
Air France
29 Mar
BOS20:45Boston Logan Intl
39h 00m
2 stops
CWL16:45Cardiff Wales
1 Apr
CWL09:50Cardiff Wales
18h 48m
2 stops
BOS23:38Boston Logan Intl
£633
Find similar
Air France
29 Mar
BOS20:45Boston Logan Intl
39h 00m
2 stops
CWL16:45Cardiff Wales
1 Apr
CWL09:50Cardiff Wales
20h 09m
2 stops
BOS00:59Boston Logan Intl
£634
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Boston to Cardiff 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 2 November 2025.
Use the filters below to find and compare flights from Boston to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 30/11

19:10-16:45

1 stop16h 35m

Cardiff Wales

Sun 7/12

10:20-18:55

1 stop13h 35m

£551

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 30/11

19:10-16:45

1 stop16h 35m

Cardiff Wales

Sun 7/12

10:20-18:59

2 stops13h 39m

£560

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 27/11

19:10-16:45

1 stop16h 35m

Cardiff Wales

Mon 1/12

10:20-13:20

1 stop32h 00m

£620

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 29/3

20:20-09:15

1 stop31h 55m

Cardiff Wales

Wed 1/4

09:50-18:25

1 stop13h 35m

£629

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 29/3

20:20-16:45

1 stop15h 25m

Cardiff Wales

Wed 1/4

09:50-16:30

1 stop11h 40m

£631

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 29/3

20:45-16:45

2 stops39h 00m

Cardiff Wales

Wed 1/4

09:50-23:38

2 stops18h 48m

£633

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 29/3

20:45-16:45

2 stops39h 00m

Cardiff Wales

Wed 1/4

09:50-00:59

2 stops20h 09m

£634

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sat 11/4

20:50-21:20

2 stops19h 30m

Cardiff Wales

Tue 21/4

16:15-20:45

3 stops33h 30m

£642

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sat 11/4

22:20-16:45

2 stops13h 25m

Cardiff Wales

Tue 21/4

09:50-16:30

1 stop11h 40m

£824

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sat 11/4

16:45-09:15

1 stop11h 30m

Cardiff Wales

Tue 21/4

09:50-16:30

1 stop11h 40m

£956

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Cardiff from

How to get the cheapest flight ticket from Boston to Cardiff

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 airline that flies from Boston Logan Intl to Cardiff Wales?

KLM is the most popular carrier operating from Boston Logan Intl to Cardiff Wales

When to book flights from Boston to Cardiff

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Cardiff according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Boston to Cardiff (BOS to CWL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Cardiff

Direct flights

None
There are no direct flights from Boston to Cardiff. There are no popular flight routes from Boston to Cardiff.
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  • How far is Boston Logan Intl to Cardiff Wales by plane?

    Boston Logan Intl and Cardiff Wales are 3144.0 mi apart from one another. Typically, this will take 9h 40m by plane in normal conditions.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Cardiff Wales Airport?

    Prices for flights from Boston Logan Intl Airport to Cardiff Wales Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Boston Logan Intl Airport to Cardiff Wales Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The necessary travel and health documents for your Cardiff Wales Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry
Bridgend

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Cardiff?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to Cardiff. momondo saves you time and could save you money on your trip.

Can I find flights from Boston to Cardiff with flexible booking policies on momondo?

Flights from Boston to Cardiff with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Boston to Cardiff?

momondo helps you find the best flight between Boston and Cardiff 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 Boston to Cardiff right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Cardiff, momondo offers a useful price alert feature which will track prices for flights to Cardiff from Boston and alert you when they change.

An easier way to manage your Cardiff trip

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Airports servicing Wales

Holyhead Anglesey Airport