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Cheap flights from Boston to Cardiff from $309

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 10/7. 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 round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:25 pm - 10:50 pm
BOS
-
CWL
24h 25m
1 stop
Multiple Airlines Logo
11:15 pm - 7:41 pm
CWL
-
BOS
25h 26m
2 stops
$694Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
10:05 am - 10:50 pm
BOS
-
CWL
31h 45m
2 stops
Multiple Airlines Logo
11:15 pm - 10:38 pm
CWL
-
BOS
28h 23m
2 stops
$726Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
10:05 am - 10:50 pm
BOS
-
CWL
31h 45m
2 stops
Multiple Airlines Logo
11:15 pm - 8:55 pm
CWL
-
BOS
26h 40m
3 stops
$727Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
10:40 am - 10:50 pm
BOS
-
CWL
31h 10m
3 stops
Multiple Airlines Logo
11:15 pm - 8:55 pm
CWL
-
BOS
26h 40m
3 stops
$737Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
5:25 pm - 10:25 pm
BOS
-
CWL
24h 00m
1 stop
Multiple Airlines Logo
10:10 pm - 7:15 pm
CWL
-
BOS
26h 05m
2 stops
$795Multiple Airlines
Wed, Aug 12 - Mon, Aug 17
Multiple Airlines Logo
7:30 pm - 10:15 am
BOS
-
CWL
33h 45m
1 stop
Multiple Airlines Logo
11:35 am - 6:35 pm
CWL
-
BOS
12h 00m
1 stop
$813Multiple Airlines
Thu, Jul 2 - Mon, Jul 13
Multiple Airlines Logo
5:25 pm - 6:55 am
BOS
-
CWL
8h 30m
1 stop
Multiple Airlines Logo
11:15 pm - 7:15 pm
CWL
-
BOS
25h 00m
2 stops
$814Multiple Airlines
Fri, Aug 14 - Wed, Aug 19
Multiple Airlines Logo
9:15 pm - 6:55 am
BOS
-
CWL
28h 40m
1 stop
Multiple Airlines Logo
10:10 pm - 6:35 pm
CWL
-
BOS
25h 25m
2 stops
$835Multiple Airlines
Thu, Jul 2 - Mon, Jul 13
Multiple Airlines Logo
7:30 pm - 10:15 am
BOS
-
CWL
33h 45m
1 stop
Multiple Airlines Logo
11:35 am - 6:35 pm
CWL
-
BOS
12h 00m
1 stop
$838Multiple Airlines
Thu, Jul 2 - Mon, Jul 13
Multiple Airlines Logo
10:05 am - 9:45 pm
BOS
-
CWL
30h 40m
2 stops
Multiple Airlines Logo
11:35 am - 7:15 pm
CWL
-
BOS
12h 40m
1 stop
$844Multiple Airlines
Sun, Aug 9 - Sat, Aug 22

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Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets
Delta
Sep 6
BOS12:25 pmBoston Logan Intl
15h 50m
2 stops
CWL9:15 amCardiff Wales
Sep 14
CWL9:45 amCardiff Wales
11h 50m
1 stop
BOS4:35 pmBoston Logan Intl
$1,098
Delta
Sep 6
BOS12:25 pmBoston Logan Intl
15h 50m
2 stops
CWL9:15 amCardiff Wales
Sep 14
CWL9:45 amCardiff Wales
11h 50m
1 stop
BOS4:35 pmBoston Logan Intl
$1,099
Delta
Sep 13
BOS7:00 pmBoston Logan Intl
9h 15m
1 stop
CWL9:15 amCardiff Wales
Sep 27
CWL9:50 amCardiff Wales
18h 20m
2 stops
BOS11:10 pmBoston Logan Intl
$1,100

WestJet flights from Boston to Cardiff

Our best WestJet deals on Boston to Cardiff flight tickets
WestJet
Jun 28
BOS5:30 amBoston Logan Intl
23h 45m
2 stops
CWL10:15 amCardiff Wales
Jul 4
CWL11:35 amCardiff Wales
17h 21m
2 stops
BOS11:56 pmBoston Logan Intl
$1,559
WestJet
Jun 28
BOS5:30 amBoston Logan Intl
23h 45m
2 stops
CWL10:15 amCardiff Wales
Jul 4
CWL11:35 amCardiff Wales
17h 21m
2 stops
BOS11:56 pmBoston Logan Intl
$1,576
WestJet
Jun 28
BOS5:30 amBoston Logan Intl
23h 45m
2 stops
CWL10:15 amCardiff Wales
Jul 4
CWL11:35 amCardiff Wales
17h 21m
2 stops
BOS11:56 pmBoston Logan Intl
$1,612

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated June 19, 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 round-trip

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 8/17

5:25 pm-10:50 pm

1 stop24h 25m

Cardiff Wales

Tue 8/25

11:15 pm-7:41 pm

2 stops25h 26m

$694

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 8/17

10:05 am-10:50 pm

2 stops31h 45m

Cardiff Wales

Tue 8/25

11:15 pm-10:38 pm

2 stops28h 23m

$726

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 8/17

10:05 am-10:50 pm

2 stops31h 45m

Cardiff Wales

Tue 8/25

11:15 pm-8:55 pm

3 stops26h 40m

$727

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 8/17

10:40 am-10:50 pm

3 stops31h 10m

Cardiff Wales

Tue 8/25

11:15 pm-8:55 pm

3 stops26h 40m

$737

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 8/12

5:25 pm-10:25 pm

1 stop24h 00m

Cardiff Wales

Mon 8/17

10:10 pm-7:15 pm

2 stops26h 05m

$795

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 7/2

7:30 pm-10:15 am

1 stop33h 45m

Cardiff Wales

Mon 7/13

11:35 am-6:35 pm

1 stop12h 00m

$813
Quickest round-trip

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 8/14

5:25 pm-6:55 am

1 stop8h 30m

Cardiff Wales

Wed 8/19

11:15 pm-7:15 pm

2 stops25h 00m

$814

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 7/2

9:15 pm-6:55 am

1 stop28h 40m

Cardiff Wales

Mon 7/13

10:10 pm-6:35 pm

2 stops25h 25m

$835

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 7/2

7:30 pm-10:15 am

1 stop33h 45m

Cardiff Wales

Mon 7/13

11:35 am-6:35 pm

1 stop12h 00m

$838

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 8/9

10:05 am-9:45 pm

2 stops30h 40m

Cardiff Wales

Sat 8/22

11:35 am-7:15 pm

1 stop12h 40m

$844

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 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 aren’t able to travel to Cardiff during the month of December, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $687.

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 round-trip 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?

    There are 3144.0 mi between Boston Logan Intl and Cardiff Wales. By plane, this route typically takes 8h 30m.

  • 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?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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.

Why use momondo?

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

Finding the right flight to Cardiff from Boston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Cardiff quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Boston to Cardiff flights to just show those with flexible booking policies.

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?

Of course. momondo tracks the price of Boston to Cardiff flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Cardiff trip

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Aer Lingus