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Cheap flights from Boston to Cardiff from £221

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 3/8. 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
Voted winner of Europe's Best Travel App 2023

Find the cheapest flights from Boston to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
17:25 - 22:50
BOS
-
CWL
24h 25m
1 stop
Multiple Airlines Logo
23:15 - 19:41
CWL
-
BOS
25h 26m
2 stops
£524Multiple Airlines
Mon, 17 Aug - Tue, 25 Aug
Multiple Airlines Logo
10:05 - 22:50
BOS
-
CWL
31h 45m
2 stops
Multiple Airlines Logo
23:15 - 22:38
CWL
-
BOS
28h 23m
2 stops
£548Multiple Airlines
Mon, 17 Aug - Tue, 25 Aug
Multiple Airlines Logo
10:05 - 22:50
BOS
-
CWL
31h 45m
2 stops
Multiple Airlines Logo
23:15 - 20:55
CWL
-
BOS
26h 40m
3 stops
£549Multiple Airlines
Mon, 17 Aug - Tue, 25 Aug
Multiple Airlines Logo
10:40 - 22:50
BOS
-
CWL
31h 10m
3 stops
Multiple Airlines Logo
23:15 - 20:55
CWL
-
BOS
26h 40m
3 stops
£556Multiple Airlines
Mon, 17 Aug - Tue, 25 Aug
Multiple Airlines Logo
17:25 - 22:25
BOS
-
CWL
24h 00m
1 stop
Multiple Airlines Logo
22:10 - 19:15
CWL
-
BOS
26h 05m
2 stops
£600Multiple Airlines
Wed, 12 Aug - Mon, 17 Aug
Multiple Airlines Logo
19:30 - 10:15
BOS
-
CWL
33h 45m
1 stop
Multiple Airlines Logo
11:35 - 18:35
CWL
-
BOS
12h 00m
1 stop
£613Multiple Airlines
Thu, 2 Jul - Mon, 13 Jul
Multiple Airlines Logo
17:25 - 06:55
BOS
-
CWL
8h 30m
1 stop
Multiple Airlines Logo
23:15 - 19:15
CWL
-
BOS
25h 00m
2 stops
£614Multiple Airlines
Fri, 14 Aug - Wed, 19 Aug
Multiple Airlines Logo
21:15 - 06:55
BOS
-
CWL
28h 40m
1 stop
Multiple Airlines Logo
22:10 - 18:35
CWL
-
BOS
25h 25m
2 stops
£630Multiple Airlines
Thu, 2 Jul - Mon, 13 Jul
Multiple Airlines Logo
19:30 - 10:15
BOS
-
CWL
33h 45m
1 stop
Multiple Airlines Logo
11:35 - 18:35
CWL
-
BOS
12h 00m
1 stop
£632Multiple Airlines
Thu, 2 Jul - Mon, 13 Jul
Multiple Airlines Logo
10:05 - 21:45
BOS
-
CWL
30h 40m
2 stops
Multiple Airlines Logo
11:35 - 19:15
CWL
-
BOS
12h 40m
1 stop
£637Multiple Airlines
Sun, 9 Aug - Sat, 22 Aug

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Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets
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
£828
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
£829
Delta
28 Jun
BOS20:25Boston Logan Intl
15h 20m
1 stop
CWL16:45Cardiff Wales
4 Jul
CWL09:50Cardiff Wales
17h 51m
2 stops
BOS22:41Boston Logan Intl
£1,112

WestJet flights from Boston to Cardiff

Our best WestJet deals on Boston to Cardiff flight tickets
WestJet
28 Jun
BOS05:30Boston Logan Intl
23h 45m
2 stops
CWL10:15Cardiff Wales
4 Jul
CWL11:35Cardiff Wales
17h 21m
2 stops
BOS23:56Boston Logan Intl
£1,176
WestJet
28 Jun
BOS05:30Boston Logan Intl
23h 45m
2 stops
CWL10:15Cardiff Wales
4 Jul
CWL11:35Cardiff Wales
17h 21m
2 stops
BOS23:56Boston Logan Intl
£1,189
WestJet
28 Jun
BOS05:30Boston Logan Intl
23h 45m
2 stops
CWL10:15Cardiff Wales
4 Jul
CWL11:35Cardiff Wales
17h 21m
2 stops
BOS23:56Boston Logan Intl
£1,216

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 19 June 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

Mon 17/8

17:25-22:50

1 stop24h 25m

Cardiff Wales

Tue 25/8

23:15-19:41

2 stops25h 26m

£524

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 17/8

10:05-22:50

2 stops31h 45m

Cardiff Wales

Tue 25/8

23:15-22:38

2 stops28h 23m

£548

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 17/8

10:05-22:50

2 stops31h 45m

Cardiff Wales

Tue 25/8

23:15-20:55

3 stops26h 40m

£549

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 17/8

10:40-22:50

3 stops31h 10m

Cardiff Wales

Tue 25/8

23:15-20:55

3 stops26h 40m

£556

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 12/8

17:25-22:25

1 stop24h 00m

Cardiff Wales

Mon 17/8

22:10-19:15

2 stops26h 05m

£600

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 2/7

19:30-10:15

1 stop33h 45m

Cardiff Wales

Mon 13/7

11:35-18:35

1 stop12h 00m

£613
Fastest return journey

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 14/8

17:25-06:55

1 stop8h 30m

Cardiff Wales

Wed 19/8

23:15-19:15

2 stops25h 00m

£614

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 2/7

21:15-06:55

1 stop28h 40m

Cardiff Wales

Mon 13/7

22:10-18:35

2 stops25h 25m

£630

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 2/7

19:30-10:15

1 stop33h 45m

Cardiff Wales

Mon 13/7

11:35-18:35

1 stop12h 00m

£632

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 9/8

10:05-21:45

2 stops30h 40m

Cardiff Wales

Sat 22/8

11:35-19:15

1 stop12h 40m

£637

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 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 February is also very affordable. Most momondo users find prices during this month for around £518.

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

8h 30m

Direct flights

None
The fastest flight from Boston to Cardiff takes 8h 30m
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 8h 30m 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