HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Cardiff

$295+ Cheap flights from Boston (BOS) to Cardiff (CWL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CWL
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Cardiff with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Boston to Cardiff

Cheapest flights from Boston to Cardiff
Explore the most affordable flight options available from Boston to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

This Mytrip deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/139:20 pmBOS - CWL
1 stop18h 35mMultiple Airlines
lun. 12/1511:30 pmCWL - BOS
1 stop19h 20mMultiple Airlines
Deal found 12/9$765
This Air France deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/247:10 pmBOS - CWL
1 stop9h 40mMultiple Airlines
mié. 12/3110:20 amCWL - BOS
2 stops17h 54mMultiple Airlines
Deal found 12/9$1,291
This KLM deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/247:10 pmBOS - CWL
1 stop16h 45mKLM
mié. 12/3110:20 amCWL - BOS
1 stop13h 35mKLM
Deal found 12/9$1,677

Find flight deals from Boston to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Cardiff (CWL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$694
(Kiwi.com)

One-way from

$295
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$837
Provider with most accurate pricing for Boston Logan Intl-Cardiff Wales flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Cardiff Wales flights.
Search Deals
From Boston Logan Intl to Cardiff Wales
Search Deals
One-way flight from Boston Logan Intl to Cardiff Wales
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($248 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated diciembre 12, 2025.
Use the filters below to find and compare flights from Boston to Cardiff that are best for you.

Fly from

Boston

Fly to

Cardiff

Route

Depart

Return

Price

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

dom. 1/25

9:15 pm-11:05 pm

1 stop20h 50m

Cardiff Wales

dom. 2/1

6:25 pm-8:55 pm

2 stops31h 30m

$694

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

dom. 1/25

8:50 pm-4:45 pm

1 stop14h 55m

Cardiff Wales

dom. 2/1

10:15 am-6:55 pm

1 stop13h 40m

$733

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 3/16

8:10 pm-9:50 am

1 stop9h 40m

Cardiff Wales

jue. 3/19

5:25 pm-7:55 pm

1 stop30h 30m

$812

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 2/9

7:10 pm-9:50 am

1 stop9h 40m

Cardiff Wales

vie. 2/13

10:20 am-6:55 pm

1 stop13h 35m

$812

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 3/16

8:10 pm-9:50 am

1 stop9h 40m

Cardiff Wales

jue. 3/19

10:20 am-11:53 pm

2 stops17h 33m

$822

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 3/16

9:05 am-9:50 am

2 stops20h 45m

Cardiff Wales

jue. 3/19

10:20 am-7:15 am

2 stops24h 55m

$832

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mié. 12/24

7:10 pm-9:50 am

1 stop9h 40m

Cardiff Wales

mié. 12/31

10:20 am-11:14 pm

2 stops17h 54m

$1,291

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

mié. 12/24

7:10 pm-4:55 pm

1 stop16h 45m

Cardiff Wales

mié. 12/31

10:20 am-6:55 pm

1 stop13h 35m

$1,677

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

vie. 5/1

5:30 pm-9:00 am

1 stop10h 30m

$295

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

lun. 12/29

7:50 pm-9:35 pm

2 stops20h 45m

$466

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 12 results
1
2

Compare providers for flights from Boston to Cardiff

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Cardiff in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Cardiff flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-Cardiff flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-Cardiff flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Cardiff flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Cardiff flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Cardiff

What is the cheapest month to book a flight from Boston to Cardiff?

Currently, January is the cheapest month in which you can book a flight from Boston to Cardiff (average of $515). Flying from Boston to Cardiff in June is currently the most expensive (average of $1,059). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Cardiff

Get insights into the airlines that provide service to Cardiff. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cardiff. Reviews last updated diciembre 12, 2025.
See what other customers who have flown with Delta and KLM from Boston to Cardiff have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.7
Good
1,432 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Boston to Cardiff. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Cardiff?

    A quick flight from Boston to Cardiff can take about 9h 40m. Delta provides one of the quickest options available for as low as $812. The distance from Boston to Cardiff is about 3137 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Boston to Cardiff round-trip?

    Our cheapest airline available from Boston to Cardiff is KLM. Our recent data shows that you can find tickets from as low as $644 on this airline. An additional option worth looking into is Delta, starting at $791. You may be able to fly from Boston to Cardiff for 32% less than the average price by searching for these airlines.

  • Can I find deals for flights from Boston to Cardiff that include hotel bookings?

    Yes. In addition to deals on Boston to Cardiff flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Cardiff.

  • Can I find deals for business class flights from Boston to Cardiff?

    Yes. Cheapflights offers flight deals from Boston to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Cardiff?

    Currently, January is the cheapest month in which you can book a flight from Boston to Cardiff (average of $515). Flying from Boston to Cardiff in June is currently the most expensive (average of $1,059). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Bridgend

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Boston to Cardiff

Discover the top 2 airlines that operate flights from Boston to Cardiff. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$644Average$828FlexibilityNo cancel feeOn-time75%
DeltaCheapest$791Average$992FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.