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Cheap flights from Boston to Cardiff from £462

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Cardiff departing on 10/9. 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

Find the cheapest flights from Boston to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
21:40 - 21:45
BOS
-
CWL
19h 05m
2 stops
Multiple Airlines Logo
21:45 - 14:41
CWL
-
BOS
21h 56m
2 stops
£587Multiple Airlines
Sun, 13 Sep - Sun, 20 Sep
Multiple Airlines Logo
21:15 - 21:45
BOS
-
CWL
19h 30m
1 stop
Multiple Airlines Logo
09:35 - 16:10
CWL
-
BOS
35h 35m
2 stops
£624Multiple Airlines
Sun, 13 Sep - Sun, 20 Sep
Multiple Airlines Logo
21:15 - 21:45
BOS
-
CWL
19h 30m
1 stop
Multiple Airlines Logo
09:35 - 19:45
CWL
-
BOS
39h 10m
2 stops
£644Multiple Airlines
Sun, 11 Oct - Sun, 18 Oct
Multiple Airlines Logo
20:50 - 21:45
BOS
-
CWL
19h 55m
2 stops
Multiple Airlines Logo
09:35 - 14:55
CWL
-
BOS
34h 20m
2 stops
£653Multiple Airlines
Sun, 11 Oct - Sun, 18 Oct
Multiple Airlines Logo
23:00 - 21:45
BOS
-
CWL
17h 45m
2 stops
Multiple Airlines Logo
21:45 - 20:20
CWL
-
BOS
27h 35m
3 stops
£672Multiple Airlines
Sun, 11 Oct - Sun, 18 Oct
Multiple Airlines Logo
21:15 - 21:45
BOS
-
CWL
19h 30m
1 stop
Multiple Airlines Logo
21:45 - 14:55
CWL
-
BOS
22h 10m
1 stop
£685Multiple Airlines
Sun, 13 Sep - Sun, 20 Sep
Multiple Airlines Logo
05:45 - 10:15
BOS
-
CWL
23h 30m
2 stops
Multiple Airlines Logo
11:35 - 18:35
CWL
-
BOS
12h 00m
1 stop
£690Multiple Airlines
Fri, 4 Sep - Tue, 8 Sep
Multiple Airlines Logo
05:45 - 10:15
BOS
-
CWL
23h 30m
3 stops
Multiple Airlines Logo
11:35 - 21:26
CWL
-
BOS
14h 51m
2 stops
£694Multiple Airlines
Fri, 4 Sep - Tue, 8 Sep
Multiple Airlines Logo
10:05 - 10:15
BOS
-
CWL
19h 10m
1 stop
Multiple Airlines Logo
11:35 - 18:35
CWL
-
BOS
12h 00m
1 stop
£732Multiple Airlines
Fri, 4 Sep - Tue, 8 Sep
Multiple Airlines Logo
17:25 - 06:55
BOS
-
CWL
8h 30m
1 stop
Multiple Airlines Logo
13:25 - 19:55
CWL
-
BOS
10h 30m
1 stop
£741Multiple Airlines
Fri, 23 Oct - Thu, 29 Oct

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KLM flights from Boston to Cardiff

Our best KLM deals on Boston to Cardiff flight tickets
KLM
16 Nov
BOS19:25Boston Logan Intl
9h 25m
1 stop
CWL09:50Cardiff Wales
23 Nov
CWL17:30Cardiff Wales
25h 43m
1 stop
BOS14:13Boston Logan Intl
£817
KLM
16 Nov
BOS19:25Boston Logan Intl
9h 25m
1 stop
CWL09:50Cardiff Wales
23 Nov
CWL17:30Cardiff Wales
25h 43m
1 stop
BOS14:13Boston Logan Intl
£818
KLM
16 Nov
BOS13:00Boston Logan Intl
15h 50m
2 stops
CWL09:50Cardiff Wales
23 Nov
CWL17:30Cardiff Wales
25h 43m
1 stop
BOS14:13Boston Logan Intl
£821

Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets
Delta
16 Nov
BOS13:35Boston Logan Intl
15h 15m
2 stops
CWL09:50Cardiff Wales
23 Nov
CWL10:20Cardiff Wales
18h 36m
2 stops
BOS23:56Boston Logan Intl
£864
Delta
16 Nov
BOS12:20Boston Logan Intl
16h 30m
2 stops
CWL09:50Cardiff Wales
23 Nov
CWL10:20Cardiff Wales
18h 36m
2 stops
BOS23:56Boston Logan Intl
£866
Delta
6 Sept
BOS12:25Boston Logan Intl
15h 50m
2 stops
CWL09:15Cardiff Wales
14 Sept
CWL09:45Cardiff Wales
11h 50m
1 stop
BOS16:35Boston Logan Intl
£882

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 1 August 2026.
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

Cheapest return flight

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 13/9

21:40-21:45

2 stops19h 05m

Cardiff Wales

Sun 20/9

21:45-14:41

2 stops21h 56m

£587

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 13/9

21:15-21:45

1 stop19h 30m

Cardiff Wales

Sun 20/9

09:35-16:10

2 stops35h 35m

£624

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 11/10

21:15-21:45

1 stop19h 30m

Cardiff Wales

Sun 18/10

09:35-19:45

2 stops39h 10m

£644

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 11/10

20:50-21:45

2 stops19h 55m

Cardiff Wales

Sun 18/10

09:35-14:55

2 stops34h 20m

£653

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 11/10

23:00-21:45

2 stops17h 45m

Cardiff Wales

Sun 18/10

21:45-20:20

3 stops27h 35m

£672

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 13/9

21:15-21:45

1 stop19h 30m

Cardiff Wales

Sun 20/9

21:45-14:55

1 stop22h 10m

£685

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 4/9

05:45-10:15

2 stops23h 30m

Cardiff Wales

Tue 8/9

11:35-18:35

1 stop12h 00m

£690

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 4/9

05:45-10:15

3 stops23h 30m

Cardiff Wales

Tue 8/9

11:35-21:26

2 stops14h 51m

£694

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 4/9

10:05-10:15

1 stop19h 10m

Cardiff Wales

Tue 8/9

11:35-18:35

1 stop12h 00m

£732
Fastest return journey

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 23/10

17:25-06:55

1 stop8h 30m

Cardiff Wales

Thu 29/10

13:25-19:55

1 stop10h 30m

£741

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 month to fly to Cardiff?

The month of December is, on average, the cheapest month to fly to Cardiff from Boston, with most prices found around £0. If you are unable to visit Cardiff during the month of December, then departing from Boston during the month June is also very affordable. Most momondo users find prices during this month for around £0.

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

Fastest flight time

9h 25m

Direct flights

None
The fastest flight from Boston to Cardiff takes 9h 25m
There are no direct flights from Boston to Cardiff. There are no popular flight routes from Boston to Cardiff.
Search flight deals

Frequently asked questions about flying from Boston to Cardiff

  • 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 25m 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

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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Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport