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Cheap flights from Boston to Cardiff from £625

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 29/4. 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
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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
21:15 - 22:25
BOS
-
CWL
20h 10m
1 stop
Multiple Airlines Logo
23:30 - 21:05
CWL
-
BOS
26h 35m
2 stops
£625Multiple Airlines
Wed, 29 Apr - Wed, 6 May
Multiple Airlines Logo
17:25 - 22:25
BOS
-
CWL
24h 00m
1 stop
Multiple Airlines Logo
23:30 - 18:50
CWL
-
BOS
24h 20m
1 stop
£656Multiple Airlines
Wed, 29 Apr - Wed, 6 May
Multiple Airlines Logo
17:25 - 06:55
BOS
-
CWL
8h 30m
1 stop
Multiple Airlines Logo
22:10 - 19:55
CWL
-
BOS
26h 45m
2 stops
£669Multiple Airlines
Fri, 24 Apr - Mon, 27 Apr
Multiple Airlines Logo
23:30 - 22:20
BOS
-
CWL
17h 50m
1 stop
Multiple Airlines Logo
16:55 - 21:05
CWL
-
BOS
33h 10m
2 stops
£675Multiple Airlines
Thu, 30 Apr - Thu, 7 May
Multiple Airlines Logo
17:40 - 13:05
BOS
-
CWL
38h 25m
2 stops
Multiple Airlines Logo
21:10 - 19:50
CWL
-
BOS
27h 40m
2 stops
£688Multiple Airlines
Wed, 29 Apr - Wed, 6 May
Multiple Airlines Logo
17:25 - 06:55
BOS
-
CWL
8h 30m
1 stop
Multiple Airlines Logo
22:25 - 18:50
CWL
-
BOS
25h 25m
1 stop
£706Multiple Airlines
Fri, 21 Aug - Mon, 31 Aug
Multiple Airlines Logo
17:25 - 21:45
BOS
-
CWL
23h 20m
1 stop
Multiple Airlines Logo
07:30 - 14:55
CWL
-
BOS
12h 25m
1 stop
£742Multiple Airlines
Sun, 23 Aug - Sat, 29 Aug
Multiple Airlines Logo
17:25 - 21:45
BOS
-
CWL
23h 20m
1 stop
Multiple Airlines Logo
07:30 - 22:00
CWL
-
BOS
19h 30m
1 stop
£746Multiple Airlines
Sun, 23 Aug - Sat, 29 Aug
Multiple Airlines Logo
23:15 - 22:25
BOS
-
CWL
18h 10m
3 stops
Multiple Airlines Logo
23:30 - 20:20
CWL
-
BOS
25h 50m
2 stops
£749Multiple Airlines
Wed, 29 Apr - Wed, 6 May
Multiple Airlines Logo
17:25 - 06:55
BOS
-
CWL
8h 30m
1 stop
Multiple Airlines Logo
22:10 - 14:55
CWL
-
BOS
21h 45m
1 stop
£759Multiple Airlines
Fri, 24 Apr - Mon, 27 Apr

Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets
Delta
6 Sept
BOS19:00Boston Logan Intl
9h 15m
1 stop
CWL09:15Cardiff Wales
26 Sept
CWL09:45Cardiff Wales
13h 45m
1 stop
BOS18:30Boston Logan Intl
£798
Delta
6 Sept
BOS19:00Boston Logan Intl
9h 15m
1 stop
CWL09:15Cardiff Wales
14 Sept
CWL09:45Cardiff Wales
17h 51m
2 stops
BOS22:36Boston Logan Intl
£806
Delta
30 Apr
BOS12:30Boston Logan Intl
15h 45m
2 stops
CWL09:15Cardiff Wales
7 May
CWL09:45Cardiff Wales
17h 33m
2 stops
BOS22:18Boston Logan Intl
£834

Scandinavian Airlines flights from Boston to Cardiff

Our best Scandinavian Airlines deals on Boston to Cardiff flight tickets
Scandinavian Airlines
21 Aug
BOS20:25Boston Logan Intl
15h 40m
1 stop
CWL17:05Cardiff Wales
31 Aug
CWL09:45Cardiff Wales
17h 51m
2 stops
BOS22:36Boston Logan Intl
£893
Scandinavian Airlines
21 Aug
BOS13:10Boston Logan Intl
15h 05m
2 stops
CWL09:15Cardiff Wales
31 Aug
CWL09:45Cardiff Wales
17h 35m
2 stops
BOS22:20Boston Logan Intl
£896

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 20 March 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

Wed 29/4

21:15-22:25

1 stop20h 10m

Cardiff Wales

Wed 6/5

23:30-21:05

2 stops26h 35m

£625

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 29/4

17:25-22:25

1 stop24h 00m

Cardiff Wales

Wed 6/5

23:30-18:50

1 stop24h 20m

£656

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 24/4

17:25-06:55

1 stop8h 30m

Cardiff Wales

Mon 27/4

22:10-19:55

2 stops26h 45m

£669

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 30/4

23:30-22:20

1 stop17h 50m

Cardiff Wales

Thu 7/5

16:55-21:05

2 stops33h 10m

£675

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 29/4

17:40-13:05

2 stops38h 25m

Cardiff Wales

Wed 6/5

21:10-19:50

2 stops27h 40m

£688

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 21/8

17:25-06:55

1 stop8h 30m

Cardiff Wales

Mon 31/8

22:25-18:50

1 stop25h 25m

£706

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 23/8

17:25-21:45

1 stop23h 20m

Cardiff Wales

Sat 29/8

07:30-14:55

1 stop12h 25m

£742

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 23/8

17:25-21:45

1 stop23h 20m

Cardiff Wales

Sat 29/8

07:30-22:00

1 stop19h 30m

£746

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 29/4

23:15-22:25

3 stops18h 10m

Cardiff Wales

Wed 6/5

23:30-20:20

2 stops25h 50m

£749
Fastest return journey

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 24/4

17:25-06:55

1 stop8h 30m

Cardiff Wales

Mon 27/4

22:10-14:55

1 stop21h 45m

£759

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 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 February is, on average, the cheapest month to fly to Cardiff from Boston, with most prices found around £515. 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 £551.

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

  • 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