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$689+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Mar 30 — Apr 61
Mon 3/30
Mon 4/6
1 adult, Economy
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Cheap 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 February 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1610:50 pm
CWL
-
BOS
2 stops27h 15m
Multiple Airlines
Mon 4/2011:30 pm
BOS
-
CWL
1 stop18h 20m
Multiple Airlines
Deal found 2/27$689
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Sun 4/129:45 pm
CWL
-
BOS
2 stops52h 20m
Multiple Airlines
Sun 4/195:25 pm
BOS
-
CWL
1 stop23h 35m
Multiple Airlines
Deal found 2/26$749
This Expedia deal was found by Cheapflights users on 2/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:15 pm
CWL
-
BOS
1 stop24h 58m
Air France
Mon 4/208:25 pm
BOS
-
CWL
1 stop15h 20m
Air France
Deal found 2/25$769
This Mytrip deal was found by Cheapflights users on 2/27. 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.
Sun 3/299:45 pm
CWL
-
BOS
2 stops25h 45m
Multiple Airlines
Sun 4/58:25 pm
BOS
-
CWL
2 stops20h 35m
Multiple Airlines
Deal found 2/27$798
This Delta deal was found by Cheapflights users on 2/25. 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.
Thu 4/169:45 am
CWL
-
BOS
2 stops19h 07m
Delta
Mon 4/2012:30 pm
BOS
-
CWL
2 stops15h 45m
Delta
Deal found 2/25$816
This KLM deal was found by Cheapflights users on 2/26. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/129:50 am
CWL
-
BOS
1 stop32h 23m
KLM
Sun 4/198:25 pm
BOS
-
CWL
1 stop31h 50m
KLM
Deal found 2/26$874

Find 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 February 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$689
(Kiwi.com)

Popular in

August

Cheapest in

June
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. 14% potential increase in price ($130 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
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 February 28, 2026.
Use the filters below to find and compare flights from Cardiff to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 4/16

10:50 pm-9:05 pm

2 stops27h 15m

Boston Logan Intl

Mon 4/20

11:30 pm-10:50 pm

1 stop18h 20m

$689

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 4/12

9:45 pm-9:05 pm

2 stops52h 20m

Boston Logan Intl

Sun 4/19

5:25 pm-10:00 pm

1 stop23h 35m

$749

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 4/16

5:15 pm-1:13 pm

1 stop24h 58m

Boston Logan Intl

Mon 4/20

8:25 pm-4:45 pm

1 stop15h 20m

$769

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 3/29

9:45 pm-6:30 pm

2 stops25h 45m

Boston Logan Intl

Sun 4/5

8:25 pm-10:00 pm

2 stops20h 35m

$798

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 4/16

9:45 am-11:52 pm

2 stops19h 07m

Boston Logan Intl

Mon 4/20

12:30 pm-9:15 am

2 stops15h 45m

$816

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 4/12

9:50 am-1:13 pm

1 stop32h 23m

Boston Logan Intl

Sun 4/19

8:25 pm-9:15 am

1 stop31h 50m

$874

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 3/29

5:15 pm-6:30 pm

1 stop30h 15m

Boston Logan Intl

Sun 4/5

4:35 pm-4:45 pm

1 stop19h 10m

$1,059

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/27

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Cardiff-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Cardiff-Boston flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 $475). Flying from Cardiff to Boston in April is currently the most expensive (average of $632). 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 24h 58m. Fly via Air France to get the fastest option. The distance between Cardiff and Boston is about 3137 mi.

  • 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 $475). Flying from Cardiff to Boston in April is currently the most expensive (average of $632). 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
Medford
Cambridge
Hampton Beach
Watertown
Seekonk
Brockton
Concord
Seabrook
Cranston
Lincoln
Smithfield
Warwick
Peabody
York Beach
Londonderry
Swansea
Old Orchard Beach
Quincy
Lowell
Chelsea

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