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Cheap flights from Boston to Cardiff from £253

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 2/6. 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 Boston to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:05 - 10:15
BOS
-
CWL
19h 10m
1 stop
Multiple Airlines Logo
22:45 - 17:35
CWL
-
BOS
23h 50m
2 stops
£608Multiple Airlines
Fri, 12 Jun - Fri, 19 Jun
Multiple Airlines Logo
10:05 - 10:15
BOS
-
CWL
19h 10m
1 stop
Multiple Airlines Logo
22:45 - 20:55
CWL
-
BOS
27h 10m
3 stops
£611Multiple Airlines
Fri, 12 Jun - Fri, 19 Jun
Multiple Airlines Logo
05:50 - 22:20
BOS
-
CWL
35h 30m
3 stops
Multiple Airlines Logo
22:50 - 20:55
CWL
-
BOS
27h 05m
3 stops
£620Multiple Airlines
Thu, 11 Jun - Thu, 18 Jun
Multiple Airlines Logo
18:35 - 10:15
BOS
-
CWL
10h 40m
1 stop
Multiple Airlines Logo
23:30 - 18:22
CWL
-
BOS
23h 52m
3 stops
£636Multiple Airlines
Wed, 10 Jun - Wed, 17 Jun
Multiple Airlines Logo
15:25 - 10:15
BOS
-
CWL
13h 50m
2 stops
Multiple Airlines Logo
23:30 - 18:22
CWL
-
BOS
23h 52m
3 stops
£641Multiple Airlines
Wed, 10 Jun - Wed, 17 Jun
Multiple Airlines Logo
10:05 - 22:20
BOS
-
CWL
31h 15m
2 stops
Multiple Airlines Logo
22:50 - 17:35
CWL
-
BOS
23h 45m
2 stops
£653Multiple Airlines
Thu, 11 Jun - Thu, 18 Jun
Multiple Airlines Logo
10:05 - 22:20
BOS
-
CWL
31h 15m
2 stops
Multiple Airlines Logo
22:50 - 20:55
CWL
-
BOS
27h 05m
3 stops
£659Multiple Airlines
Thu, 11 Jun - Thu, 18 Jun
Multiple Airlines Logo
05:50 - 22:20
BOS
-
CWL
35h 30m
3 stops
Multiple Airlines Logo
22:50 - 09:50
CWL
-
BOS
40h 00m
3 stops
£665Multiple Airlines
Thu, 11 Jun - Thu, 18 Jun
Multiple Airlines Logo
07:10 - 10:15
BOS
-
CWL
22h 05m
1 stop
Multiple Airlines Logo
11:35 - 09:05
CWL
-
BOS
26h 30m
1 stop
£680Multiple Airlines
Fri, 22 May - Tue, 2 Jun
Multiple Airlines Logo
20:50 - 23:25
BOS
-
CWL
21h 35m
3 stops
Multiple Airlines Logo
22:10 - 21:45
CWL
-
BOS
28h 35m
3 stops
£684Multiple Airlines
Tue, 22 Sep - Mon, 28 Sep

KLM flights from Boston to Cardiff

Our best KLM deals on Boston to Cardiff flight tickets
KLM
6 Sept
BOS16:40Boston Logan Intl
11h 35m
1 stop
CWL09:15Cardiff Wales
14 Sept
CWL17:15Cardiff Wales
28h 20m
1 stop
BOS16:35Boston Logan Intl
£773
KLM
6 Sept
BOS16:40Boston Logan Intl
11h 35m
1 stop
CWL09:15Cardiff Wales
14 Sept
CWL09:45Cardiff Wales
32h 34m
1 stop
BOS13:19Boston Logan Intl
£774
KLM
22 Sept
BOS13:10Boston Logan Intl
15h 05m
2 stops
CWL09:15Cardiff Wales
28 Sept
CWL09:45Cardiff Wales
32h 34m
1 stop
BOS13:19Boston Logan Intl
£776

Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets
Delta
6 Sept
BOS13:10Boston Logan Intl
15h 05m
2 stops
CWL09:15Cardiff Wales
14 Sept
CWL09:45Cardiff Wales
11h 50m
1 stop
BOS16:35Boston Logan Intl
£779
Delta
6 Sept
BOS13:10Boston Logan Intl
15h 05m
2 stops
CWL09:15Cardiff Wales
14 Sept
CWL09:45Cardiff Wales
11h 50m
1 stop
BOS16:35Boston Logan Intl
£780
Delta
6 Sept
BOS13:10Boston Logan Intl
15h 05m
2 stops
CWL09:15Cardiff Wales
14 Sept
CWL09:45Cardiff Wales
17h 51m
2 stops
BOS22:36Boston Logan Intl
£788

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 30 April 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

Fri 12/6

10:05-10:15

1 stop19h 10m

Cardiff Wales

Fri 19/6

22:45-17:35

2 stops23h 50m

£608

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 12/6

10:05-10:15

1 stop19h 10m

Cardiff Wales

Fri 19/6

22:45-20:55

3 stops27h 10m

£611

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/6

05:50-22:20

3 stops35h 30m

Cardiff Wales

Thu 18/6

22:50-20:55

3 stops27h 05m

£620
Fastest return journey

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 10/6

18:35-10:15

1 stop10h 40m

Cardiff Wales

Wed 17/6

23:30-18:22

3 stops23h 52m

£636

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 10/6

15:25-10:15

2 stops13h 50m

Cardiff Wales

Wed 17/6

23:30-18:22

3 stops23h 52m

£641

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/6

10:05-22:20

2 stops31h 15m

Cardiff Wales

Thu 18/6

22:50-17:35

2 stops23h 45m

£653

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/6

10:05-22:20

2 stops31h 15m

Cardiff Wales

Thu 18/6

22:50-20:55

3 stops27h 05m

£659

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/6

05:50-22:20

3 stops35h 30m

Cardiff Wales

Thu 18/6

22:50-09:50

3 stops40h 00m

£665

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 22/5

07:10-10:15

1 stop22h 05m

Cardiff Wales

Tue 2/6

11:35-09:05

1 stop26h 30m

£680

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 22/9

20:50-23:25

3 stops21h 35m

Cardiff Wales

Mon 28/9

22:10-21:45

3 stops28h 35m

£684

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 typical price of a round-trip flight between Boston and Cardiff?

What is the cheapest month to fly to Cardiff?

The month of February is, on average, the cheapest month to fly to Cardiff from Boston, with most prices found around £509. If you are unable to visit Cardiff during the month of February, then departing from Boston during the month January is also very affordable. Most momondo users find prices during this month for around £545.

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

16h 50m

Direct flights

None
The fastest flight from Boston to Cardiff takes 16h 50m
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 16h 50m 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