What airlines fly to Cardiff?

Aer Lingus, KLM and Delta are the top three most popular airlines that fly to Cardiff from Boston according to our data. Aer Lingus is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Cardiff. Keep in mind that there are 3 different airlines that fly to Cardiff on a routine basis, so you have a few additional options to choose from.

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?

There are 2 operators available for flights from Boston Logan Intl Airport to Cardiff Wales Airport as of September 2025.

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.

$258 Cheap Flights from Boston to Cardiff in 2025/26

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Find the cheapest flights from Boston to Cardiff

Round-trip

One-way

Cheap round-trip flights

9:25 pm - 7:25 amBOS-CWL

29h 00m1 stop

4:20 pm - 9:15 pmCWL-BOS

33h 55m2 stops

$530Multiple Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

6:10 pm - 10:05 amBOS-CWL

11h 55m1 stop

7:10 pm - 8:55 pmCWL-BOS

30h 45m2 stops

$572Multiple Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

6:10 pm - 10:00 pmBOS-CWL

23h 50m1 stop

10:30 am - 2:35 pmCWL-BOS

33h 05m2 stops

$673Multiple Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

4:50 pm - 4:45 pmBOS-CWL

18h 55m1 stop

5:15 pm - 6:20 pmCWL-BOS

30h 05m1 stop

$698KLM

Find Deal

Tue, Oct 14 - Tue, Oct 21

6:10 pm - 12:25 pmBOS-CWL

14h 15m2 stops

3:55 pm - 2:35 pmCWL-BOS

27h 40m2 stops

$717Multiple Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

7:10 pm - 4:45 pmBOS-CWL

16h 35m1 stop

10:20 am - 6:55 pmCWL-BOS

13h 35m1 stop

$816Delta

Find Deal

Thu, Jan 29 - Sun, Feb 1

1:10 pm - 9:50 amBOS-CWL

15h 40m2 stops

5:30 pm - 1:25 pmCWL-BOS

24h 55m1 stop

$821KLM

Find Deal

Thu, Jan 29 - Sun, Feb 1

7:10 pm - 4:45 pmBOS-CWL

16h 35m1 stop

5:15 pm - 1:20 pmCWL-BOS

25h 05m1 stop

$868KLM

Find Deal

Thu, Nov 27 - Mon, Dec 1

3:00 pm - 9:50 amBOS-CWL

13h 50m2 stops

5:15 pm - 1:20 pmCWL-BOS

25h 05m1 stop

$960KLM

Find Deal

Thu, Nov 27 - Mon, Dec 1

11:15 am - 9:50 amBOS-CWL

17h 35m2 stops

10:20 am - 10:25 pmCWL-BOS

17h 05m2 stops

$1,180Delta

Find Deal

Thu, Nov 27 - Mon, Dec 1

Delta flights from Boston to Cardiff

Our best Delta deals on Boston to Cardiff flight tickets

Delta

Jan 29

BOS7:10 pmBoston Logan Intl

16h 35m

1 stop

CWL4:45 pmCardiff Wales

Feb 1

CWL10:20 amCardiff Wales

13h 35m

1 stop

BOS6:55 pmBoston Logan Intl

$816

Find similar

Delta

Nov 27

BOS11:15 amBoston Logan Intl

17h 35m

2 stops

CWL9:50 amCardiff Wales

Dec 1

CWL10:20 amCardiff Wales

17h 05m

2 stops

BOS10:25 pmBoston Logan Intl

$1,180

Find similar

KLM flights from Boston to Cardiff

Our best KLM deals on Boston to Cardiff flight tickets

KLM

Oct 14

BOS4:50 pmBoston Logan Intl

18h 55m

1 stop

CWL4:45 pmCardiff Wales

Oct 21

CWL5:15 pmCardiff Wales

30h 05m

1 stop

BOS6:20 pmBoston Logan Intl

$698

Find similar

KLM

Jan 29

BOS1:10 pmBoston Logan Intl

15h 40m

2 stops

CWL9:50 amCardiff Wales

Feb 1

CWL5:30 pmCardiff Wales

24h 55m

1 stop

BOS1:25 pmBoston Logan Intl

$821

Find similar

KLM

Nov 27

BOS7:10 pmBoston Logan Intl

16h 35m

1 stop

CWL4:45 pmCardiff Wales

Dec 1

CWL5:15 pmCardiff Wales

25h 05m

1 stop

BOS1:20 pmBoston Logan Intl

$868

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 10/14

9:25 pm-7:25 am

1 stop29h 00m

Cardiff Wales

Tue 10/21

4:20 pm-9:15 pm

2 stops33h 55m

$530

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 10/29

6:10 pm-10:05 am

1 stop11h 55m

Cardiff Wales

Wed 11/5

7:10 pm-8:55 pm

2 stops30h 45m

$572

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 10/30

6:10 pm-10:00 pm

1 stop23h 50m

Cardiff Wales

Thu 11/6

10:30 am-2:35 pm

2 stops33h 05m

$673

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 10/14

4:50 pm-4:45 pm

1 stop18h 55m

Cardiff Wales

Tue 10/21

5:15 pm-6:20 pm

1 stop30h 05m

$698

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 10/29

6:10 pm-12:25 pm

2 stops14h 15m

Cardiff Wales

Wed 11/5

3:55 pm-2:35 pm

2 stops27h 40m

$717

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 1/29

7:10 pm-4:45 pm

1 stop16h 35m

Cardiff Wales

Sun 2/1

10:20 am-6:55 pm

1 stop13h 35m

$816

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 1/29

1:10 pm-9:50 am

2 stops15h 40m

Cardiff Wales

Sun 2/1

5:30 pm-1:25 pm

1 stop24h 55m

$821

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/27

7:10 pm-4:45 pm

1 stop16h 35m

Cardiff Wales

Mon 12/1

5:15 pm-1:20 pm

1 stop25h 05m

$868

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/27

3:00 pm-9:50 am

2 stops13h 50m

Cardiff Wales

Mon 12/1

5:15 pm-1:20 pm

1 stop25h 05m

$960

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/27

11:15 am-9:50 am

2 stops17h 35m

Cardiff Wales

Mon 12/1

10:20 am-10:25 pm

2 stops17h 05m

$1,180

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

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

Prices

Airlines

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.

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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 9h 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?
There are 2 operators available for flights from Boston Logan Intl Airport to Cardiff Wales Airport as of September 2025.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Boston to Cardiff is Delta (58% of total bookings). The next most popular airline is KLM (42%).

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
KLM	PriceFrom $766	Free Cancellation	Rating 7.8 1,386 reviews		Search KLM flights
Delta	PriceFrom $793	Free Cancellation	Rating 7.9 7,957 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.