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Cheap flights from Boston to Cardiff from $263

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 2/11. 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 round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:05 pm - 4:55 pmBOS-CWL
16h 50m1 stop
Delta Logo
10:20 am - 1:30 pmCWL-BOS
32h 10m1 stop
$678Delta
Find Deal
mié., dic. 31 - mar., ene. 27
Delta Logo
7:05 pm - 9:50 amBOS-CWL
9h 45m1 stop
Delta Logo
10:20 am - 6:55 pmCWL-BOS
13h 35m1 stop
$679Delta
Find Deal
mié., dic. 31 - mié., ene. 28
Delta Logo
6:05 am - 4:55 pmBOS-CWL
29h 50m2 stops
Delta Logo
10:20 am - 1:30 pmCWL-BOS
32h 10m1 stop
$683Delta
Find Deal
mié., dic. 31 - mar., ene. 27
KLM Logo
7:10 pm - 9:50 amBOS-CWL
9h 40m1 stop
KLM Logo
5:15 pm - 1:30 pmCWL-BOS
25h 15m1 stop
$687KLM
Find Deal
lun., ene. 12 - lun., ene. 19
Delta Logo
8:50 pm - 4:55 pmBOS-CWL
15h 05m1 stop
Delta Logo
10:20 am - 7:25 pmCWL-BOS
38h 05m2 stops
$688Delta
Find Deal
mié., dic. 31 - jue., ene. 8
KLM Logo
1:00 pm - 9:50 amBOS-CWL
15h 50m2 stops
KLM Logo
5:15 pm - 1:30 pmCWL-BOS
25h 15m1 stop
$691KLM
Find Deal
lun., ene. 12 - lun., ene. 19
Delta Logo
7:05 am - 9:50 amBOS-CWL
21h 45m2 stops
Delta Logo
10:20 am - 11:51 pmCWL-BOS
18h 31m2 stops
$693Delta
Find Deal
lun., dic. 29 - jue., ene. 29
Virgin Atlantic Logo
1:00 pm - 9:50 amBOS-CWL
15h 50m2 stops
Virgin Atlantic Logo
5:15 pm - 3:53 pmCWL-BOS
27h 38m2 stops
$701Virgin Atlantic
Find Deal
lun., ene. 12 - lun., ene. 19
Multiple Airlines Logo
5:20 pm - 7:00 amBOS-CWL
8h 40m1 stop
Multiple Airlines Logo
10:30 am - 6:59 pmCWL-BOS
13h 29m1 stop
$719Multiple Airlines
Find Deal
mar., dic. 30 - jue., ene. 8
Multiple Airlines Logo
5:20 pm - 10:05 amBOS-CWL
11h 45m1 stop
Multiple Airlines Logo
10:30 am - 6:59 pmCWL-BOS
13h 29m1 stop
$724Multiple Airlines
Find Deal
mié., dic. 31 - jue., ene. 8

Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets
Delta
Dec 31
BOS7:05 pmBoston Logan Intl
16h 50m
1 stop
CWL4:55 pmCardiff Wales
Jan 27
CWL10:20 amCardiff Wales
32h 10m
1 stop
BOS1:30 pmBoston Logan Intl
$678
Find similar
Delta
Dec 31
BOS7:05 pmBoston Logan Intl
9h 45m
1 stop
CWL9:50 amCardiff Wales
Jan 28
CWL10:20 amCardiff Wales
13h 35m
1 stop
BOS6:55 pmBoston Logan Intl
$679
Find similar
Delta
Dec 31
BOS6:05 amBoston Logan Intl
29h 50m
2 stops
CWL4:55 pmCardiff Wales
Jan 27
CWL10:20 amCardiff Wales
32h 10m
1 stop
BOS1:30 pmBoston Logan Intl
$683
Find similar

KLM flights from Boston to Cardiff

Our best KLM deals on Boston to Cardiff flight tickets
KLM
Jan 12
BOS7:10 pmBoston Logan Intl
9h 40m
1 stop
CWL9:50 amCardiff Wales
Jan 19
CWL5:15 pmCardiff Wales
25h 15m
1 stop
BOS1:30 pmBoston Logan Intl
$687
Find similar
KLM
Jan 12
BOS1:00 pmBoston Logan Intl
15h 50m
2 stops
CWL9:50 amCardiff Wales
Jan 19
CWL5:15 pmCardiff Wales
25h 15m
1 stop
BOS1:30 pmBoston Logan Intl
$691
Find similar
KLM
Dec 31
BOS7:10 pmBoston Logan Intl
9h 40m
1 stop
CWL9:50 amCardiff Wales
Jan 6
CWL5:25 pmCardiff Wales
25h 05m
1 stop
BOS1:30 pmBoston Logan Intl
$703
Find similar

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 octubre 30, 2025.
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

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mié. 12/31

7:05 pm-4:55 pm

1 stop16h 50m

Cardiff Wales

mar. 1/27

10:20 am-1:30 pm

1 stop32h 10m

$678

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mié. 12/31

7:05 pm-9:50 am

1 stop9h 45m

Cardiff Wales

mié. 1/28

10:20 am-6:55 pm

1 stop13h 35m

$679

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mié. 12/31

6:05 am-4:55 pm

2 stops29h 50m

Cardiff Wales

mar. 1/27

10:20 am-1:30 pm

1 stop32h 10m

$683

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 1/12

7:10 pm-9:50 am

1 stop9h 40m

Cardiff Wales

lun. 1/19

5:15 pm-1:30 pm

1 stop25h 15m

$687

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mié. 12/31

8:50 pm-4:55 pm

1 stop15h 05m

Cardiff Wales

jue. 1/8

10:20 am-7:25 pm

2 stops38h 05m

$688

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 1/12

1:00 pm-9:50 am

2 stops15h 50m

Cardiff Wales

lun. 1/19

5:15 pm-1:30 pm

1 stop25h 15m

$691

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 12/29

7:05 am-9:50 am

2 stops21h 45m

Cardiff Wales

jue. 1/29

10:20 am-11:51 pm

2 stops18h 31m

$693

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 1/12

1:00 pm-9:50 am

2 stops15h 50m

Cardiff Wales

lun. 1/19

5:15 pm-3:53 pm

2 stops27h 38m

$701

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mar. 12/30

5:20 pm-7:00 am

1 stop8h 40m

Cardiff Wales

jue. 1/8

10:30 am-6:59 pm

1 stop13h 29m

$719

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mié. 12/31

5:20 pm-10:05 am

1 stop11h 45m

Cardiff Wales

jue. 1/8

10:30 am-6:59 pm

1 stop13h 29m

$724

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

What is the cheapest day to depart on your flight to Cardiff?

The cheapest day to depart on your flight to Cardiff is on a Tuesday when prices can be found for as low as $830. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,427. These prices are subject to change though, so be sure to set up a Price Alert for flights to Cardiff.

What is the cheapest time of day to depart on your flight to Cardiff?

Flying to Cardiff from Boston in the evening is the least expensive time of day to depart. momondo users have found prices as low as $940 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $986 on average. Flights to Cardiff from Boston in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Direct flights

None
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?

    There are 3144.0 mi between Boston Logan Intl and Cardiff Wales. By plane, this route typically takes 8h 40m.

  • 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 many operators does momondo search for flights from Boston Logan Intl Airport to Cardiff Wales Airport?

  • 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.

  • What is the most popular airline from Boston to Cardiff?

Best airlines flying from Boston to Cardiff

Compare and see reviews for airlines that fly from Boston to Cardiff with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $766Free CancellationRating
7.7
1,406 reviews
Search KLM flights
DeltaPriceFrom $793Free CancellationRating
7.9
7,993 reviews
Search Delta flights

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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