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$734+ 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
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 June 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/711:35 am
CWL
-
BOS
1 stop12h 00m
Multiple Airlines
Tue 7/147:30 pm
BOS
-
CWL
1 stop33h 45m
Multiple Airlines
Deal found 6/9$734
This Expedia deal was found by Cheapflights users on 6/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:15 pm
CWL
-
BOS
1 stop25h 03m
KLM
Tue 7/149:05 am
BOS
-
CWL
2 stops19h 10m
KLM
Deal found 6/9$756
This KLM deal was found by Cheapflights users on 6/8. 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.
Thu 7/29:45 am
CWL
-
BOS
1 stop11h 55m
KLM
Thu 7/94:40 pm
BOS
-
CWL
1 stop19h 05m
KLM
Deal found 6/8$855
This Delta deal was found by Cheapflights users on 6/8. 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 7/29:45 am
CWL
-
BOS
2 stops17h 56m
Delta
Thu 7/91:35 pm
BOS
-
CWL
2 stops14h 40m
Delta
Deal found 6/8$861
This Expedia deal was found by Cheapflights users on 6/8. 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.
Sat 10/245:35 pm
CWL
-
BOS
1 stop25h 50m
Multiple Airlines
Sat 10/311:10 pm
BOS
-
CWL
2 stops16h 40m
Multiple Airlines
Deal found 6/8$931

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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$734
(Kiwi.com)
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
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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 June 10, 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

Cheapest round-trip

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 7/7

11:35 am-6:35 pm

1 stop12h 00m

Boston Logan Intl

Tue 7/14

7:30 pm-10:15 am

1 stop33h 45m

$734

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 7/7

5:15 pm-1:18 pm

1 stop25h 03m

Boston Logan Intl

Tue 7/14

9:05 am-9:15 am

2 stops19h 10m

$756
Quickest round-trip

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 7/2

9:45 am-4:40 pm

1 stop11h 55m

Boston Logan Intl

Thu 7/9

4:40 pm-4:45 pm

1 stop19h 05m

$855

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 7/2

9:45 am-10:41 pm

2 stops17h 56m

Boston Logan Intl

Thu 7/9

1:35 pm-9:15 am

2 stops14h 40m

$861

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 10/24

9:45 am-10:26 pm

2 stops17h 41m

Boston Logan Intl

Sat 10/31

1:10 pm-9:50 am

2 stops16h 40m

$965

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 7/21

5:15 pm-1:18 pm

1 stop25h 03m

Boston Logan Intl

Wed 8/26

4:45 pm-9:15 am

1 stop11h 30m

$1,014

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 7/21

11:35 am-9:45 am

2 stops27h 10m

Boston Logan Intl

Wed 8/26

10:40 am-10:25 pm

3 stops30h 45m

$1,056
Cheapest one-way
Quickest one-way

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 7/4

11:35 am-7:38 pm

2 stops37h 03m

$805

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/8

Sorted by cheapest first

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 June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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 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.

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 25h 03m. Fly via KLM 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.

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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Concord
Hampton Beach
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Seekonk
Cranston
Warwick
Peabody
Auburn
York Beach
Chelsea
Londonderry
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Old Orchard Beach
Lowell
Smithfield
Braintree
Sandwich

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