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$740+ Cheap flights from Cardiff (CWL) to Boston (BOS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Dec 23 — Dec 301
Tue 12/23
Tue 12/30
1 adult, Economy
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Find flight deals from Cardiff to Boston

Cheapest flights from Cardiff to Boston
Explore the most affordable flight options available from Cardiff to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 23, 2025.

This KLM deal was found by Cheapflights users on 11/21. 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.
Fri 12/1910:20 amCWL - BOS
1 stop13h 35mKLM
Fri 1/28:50 pmBOS - CWL
1 stop31h 55mKLM
Deal found 11/21$1,601
This Delta deal was found by Cheapflights users on 11/22. 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 12/1910:20 amCWL - BOS
2 stops17h 03mDelta
Fri 1/28:50 pmBOS - CWL
1 stop15h 05mDelta
Deal found 11/22$1,782

Cheap flight deals from Cardiff to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Boston (BOS). 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 November 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$740
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$830
Provider with most accurate pricing for Cardiff Wales-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Cardiff Wales-Boston Logan Intl flights.
Search Deals
From Cardiff Wales to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($155 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Cardiff to Boston 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 November 23, 2025.
Use the filters below to find and compare flights from Cardiff to Boston that are best for you.

Fly from

Cardiff

Fly to

Boston

Route

Depart

Return

Price

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 1/15

10:30 am-6:59 pm

1 stop13h 29m

Boston Logan Intl

Mon 1/19

10:40 pm-3:30 pm

2 stops35h 50m

$740

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 1/15

10:20 am-1:30 pm

1 stop32h 10m

Boston Logan Intl

Mon 1/19

7:10 pm-4:55 pm

1 stop16h 45m

$750

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 1/21

10:20 am-6:55 pm

1 stop13h 35m

Boston Logan Intl

Sun 1/25

8:50 pm-4:55 pm

2 stops39h 05m

$754

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 1/21

10:20 am-6:55 pm

1 stop13h 35m

Boston Logan Intl

Sun 1/25

8:50 pm-9:50 am

2 stops32h 00m

$756

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 1/15

10:20 am-7:33 am

2 stops26h 13m

Boston Logan Intl

Mon 1/19

10:05 am-9:50 am

2 stops18h 45m

$756

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 1/6

5:25 pm-6:55 pm

1 stop30h 30m

Boston Logan Intl

Tue 1/13

7:10 pm-4:55 pm

1 stop16h 45m

$763

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/22

Compare providers for flights from Cardiff to Boston

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 Cardiff to Boston in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 Cardiff-Boston flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Cardiff-Boston flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Cardiff-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Cardiff-Boston 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 Cardiff-Boston 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 Cardiff to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Cardiff 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 Cardiff to Boston

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

Currently, March is the cheapest month in which you can book a flight from Cardiff to Boston (average of $536). Flying from Cardiff to Boston in April is currently the most expensive (average of $627). 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.

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Boston. 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 Cardiff to Boston?

    There are many flights that can get you from Cardiff to Boston in 13h 35m. Fly via KLM or Virgin Atlantic to get the fastest option. The distance between Cardiff and Boston is about 3137 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Cardiff to Boston 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 Cardiff to Boston?

    Currently, March is the cheapest month in which you can book a flight from Cardiff to Boston (average of $536). Flying from Cardiff to Boston in April is currently the most expensive (average of $627). 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 Boston?

Book flights to Boston if you plan to visit one of these locations
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