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Cardiff

$263+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CWL
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$456
(Mytrip)

One-way from

$263
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$999
Provider with most accurate pricing for Boston Logan Intl-Cardiff Wales flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Cardiff Wales flights.
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From Boston Logan Intl to Cardiff Wales
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One-way flight from Boston Logan Intl to Cardiff Wales
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Highest demand for flights based on searches. 16% potential increase in price ($192 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 28, 2025.

This Mytrip deal was found by Cheapflights users on 10/27. 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.
Fri 11/2810:45 amBOS - CWL
2 stops27h 55mMultiple Airlines
Thu 12/410:30 amCWL - BOS
2 stops14h 30mMultiple Airlines
Deal found 10/27$456
This Mytrip deal was found by Cheapflights users on 10/27. 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.
Fri 12/55:30 amBOS - CWL
3 stops33h 10mMultiple Airlines
Sun 12/79:20 pmCWL - BOS
2 stops23h 37mMultiple Airlines
Deal found 10/27$469
This Air France deal was found by Cheapflights users on 10/26. 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.
Wed 12/107:10 pmBOS - CWL
1 stop9h 40mMultiple Airlines
Wed 12/1710:20 amCWL - BOS
1 stop32h 00mMultiple Airlines
Deal found 10/26$678
This Virgin Atlantic deal was found by Cheapflights users on 10/26. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/109:59 amBOS - CWL
2 stops18h 51mVirgin Atlantic
Wed 12/175:25 pmCWL - BOS
1 stop24h 55mVirgin Atlantic
Deal found 10/26$683
This Air France deal was found by Cheapflights users on 10/27. 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.
Fri 11/287:10 pmBOS - CWL
1 stop16h 45mKLM
Thu 12/45:25 pmCWL - BOS
1 stop24h 55mKLM
Deal found 10/27$728
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:50 pmBOS - CWL
1 stop15h 05mDelta
Thu 12/410:20 amCWL - BOS
2 stops18h 35mDelta
Deal found 10/27$739
This Mytrip deal was found by Cheapflights users on 10/26. 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.
Tue 11/255:30 amBOS - CWL
3 stops29h 00mMultiple Airlines
Tue 12/21:00 pmCWL - BOS
3 stops31h 57mMultiple Airlines
Deal found 10/26$741
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:10 pmBOS - CWL
1 stop23h 50mMultiple Airlines
Thu 12/1810:30 amCWL - BOS
1 stop13h 25mMultiple Airlines
Deal found 10/26$756
This Air France deal was found by Cheapflights users on 10/28. 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.
Thu 11/277:10 pmBOS - CWL
1 stop16h 35mMultiple Airlines
Mon 12/110:20 amCWL - BOS
1 stop32h 00mMultiple Airlines
Deal found 10/28$794
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:50 pmBOS - CWL
2 stops16h 00mDelta
Sun 12/710:20 amCWL - BOS
1 stop13h 35mDelta
Deal found 10/27$797

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 October 28, 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

Fri 11/28

10:15 am-7:40 pm

3 stops28h 25m

Cardiff Wales

Thu 12/4

10:30 am-8:00 pm

2 stops14h 30m

$456

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 12/5

10:45 am-7:40 pm

2 stops27h 55m

Cardiff Wales

Sun 12/7

9:20 pm-6:02 pm

2 stops25h 42m

$469

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 12/10

7:10 pm-9:50 am

1 stop9h 40m

Cardiff Wales

Wed 12/17

10:20 am-1:20 pm

1 stop32h 00m

$678

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 12/10

9:59 am-9:50 am

2 stops18h 51m

Cardiff Wales

Wed 12/17

5:25 pm-1:20 pm

1 stop24h 55m

$683

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 11/28

8:50 pm-4:55 pm

1 stop15h 05m

Cardiff Wales

Thu 12/4

10:20 am-11:55 pm

2 stops18h 35m

$739

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 11/25

5:30 am-3:30 pm

3 stops29h 00m

Cardiff Wales

Tue 12/2

1:00 pm-3:57 pm

3 stops31h 57m

$741

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 12/11

5:10 pm-10:00 pm

1 stop23h 50m

Cardiff Wales

Thu 12/18

10:30 am-6:55 pm

1 stop13h 25m

$756

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Thu 11/27

7:10 pm-4:45 pm

1 stop16h 35m

Cardiff Wales

Mon 12/1

10:20 am-1:20 pm

1 stop32h 00m

$794

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 12/5

12:50 pm-9:50 am

2 stops16h 00m

Cardiff Wales

Sun 12/7

10:20 am-6:55 pm

1 stop13h 35m

$797

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 1/18

5:10 pm-11:05 pm

1 stop24h 55m

Cardiff Wales

Thu 1/22

10:30 am-6:59 pm

1 stop13h 29m

$812

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 15 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 October.
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, October is the cheapest month in which you can book a flight from Boston to Cardiff (average of $596). Flying from Boston to Cardiff in June is currently the most expensive (average of $1,060). 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.

What is the cheapest time of day to fly from BOS to CWL?

Find hourly flight availability from Boston to Cardiff. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Boston to Cardiff in the morning. If you’re flexible enough to do this you can expect to save up to 54% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from Boston to Cardiff?

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 October 28, 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
7,995 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,995 reviews
Delta
7.9
Good
7,995 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
KLM
7.7
Good
1,406 reviews
Delta
7.9
Good
7,995 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 18h 51m. Virgin Atlantic provides one of the quickest options available for as low as $683. The distance from Boston to Cardiff is about 3137 mi.

  • 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 $766 on this airline. An additional option worth looking into is Delta, starting at $793. You may be able to fly from Boston to Cardiff for 20% 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, October is the cheapest month in which you can book a flight from Boston to Cardiff (average of $596). Flying from Boston to Cardiff in June is currently the most expensive (average of $1,060). 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

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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$766Average$977FlexibilityNo cancel feeOn-time75%
DeltaCheapest$793Average$999FlexibilityNo cancel feeOn-timeN/A

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