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$451+ Cheap flights from Cardiff (CWL) to Boston (BOS)

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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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1. Tell us where you want to go

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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 July 28, 2026.

This Mytrip deal was found by Cheapflights users on 7/24. 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.
Thu 9/311:35 am
CWL
-
BOS
1 stop12h 00m
Multiple Airlines
Tue 9/88:50 pm
BOS
-
CWL
2 stops21h 35m
Multiple Airlines
Deal found 7/24$760
This Expedia deal was found by Cheapflights users on 7/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:15 pm
CWL
-
BOS
1 stop25h 00m
KLM
Sun 10/184:45 pm
BOS
-
CWL
1 stop11h 30m
KLM
Deal found 7/27$787
This Virgin Atlantic deal was found by Cheapflights users on 7/27. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:45 am
CWL
-
BOS
1 stop11h 50m
Virgin Atlantic
Mon 9/218:25 pm
BOS
-
CWL
1 stop15h 20m
Virgin Atlantic
Deal found 7/27$813
This Expedia deal was found by Cheapflights users on 7/24. 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 9/35:15 pm
CWL
-
BOS
1 stop25h 04m
KLM
Tue 9/84:40 pm
BOS
-
CWL
1 stop19h 05m
KLM
Deal found 7/24$818
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:15 pm
CWL
-
BOS
2 stops38h 50m
Multiple Airlines
Tue 9/111:35 pm
BOS
-
CWL
1 stop18h 50m
Multiple Airlines
Deal found 7/28$833
This Expedia deal was found by Cheapflights users on 7/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:15 pm
CWL
-
BOS
1 stop25h 04m
Air France
Mon 9/218:25 pm
BOS
-
CWL
1 stop15h 20m
Air France
Deal found 7/26$837
This Delta deal was found by Cheapflights users on 7/24. 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 9/39:45 am
CWL
-
BOS
1 stop11h 50m
Delta
Tue 9/84:40 pm
BOS
-
CWL
1 stop11h 35m
Delta
Deal found 7/24$838

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 July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$723
(Kiwi.com)

One-way from

$451
(Trip.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
Search Deals
One-way flight from Cardiff Wales to Boston Logan Intl
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 July 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

Cheapest round-trip

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 9/3

11:35 am-6:35 pm

1 stop12h 00m

Boston Logan Intl

Tue 9/8

8:50 pm-11:25 pm

2 stops21h 35m

$760

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 9/3

5:15 pm-1:19 pm

1 stop25h 04m

Boston Logan Intl

Tue 9/8

4:40 pm-4:45 pm

1 stop19h 05m

$818

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 9/17

9:00 am-9:05 pm

2 stops17h 05m

Boston Logan Intl

Mon 9/21

11:35 pm-10:50 pm

1 stop18h 15m

$818

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 1/15

10:20 am-7:55 pm

3 stops38h 35m

Boston Logan Intl

Fri 1/29

10:10 pm-9:50 am

3 stops54h 40m

$831

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 9/17

5:15 pm-1:19 pm

1 stop25h 04m

Boston Logan Intl

Mon 9/21

8:25 pm-4:45 pm

1 stop15h 20m

$837
Quickest round-trip

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 9/3

9:45 am-4:35 pm

1 stop11h 50m

Boston Logan Intl

Tue 9/8

4:40 pm-9:15 am

1 stop11h 35m

$838

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 1/15

10:20 am-7:24 am

2 stops26h 04m

Boston Logan Intl

Fri 1/29

8:55 pm-5:00 pm

1 stop15h 05m

$845

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 9/17

5:15 pm-11:10 pm

2 stops34h 55m

Boston Logan Intl

Mon 9/21

9:20 am-4:45 pm

2 stops26h 25m

$846

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 1/15

5:30 pm-3:22 pm

2 stops26h 52m

Boston Logan Intl

Fri 1/29

1:10 pm-9:45 am

2 stops15h 35m

$852
Cheapest one-way

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 10/15

10:50 pm-9:05 am

2 stops39h 15m

$512

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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 July.
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. 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
Waltham
Cambridge
Concord
Randolph
Brockton
Seekonk
Hampton Beach
Cranston
Warwick
Peabody
Dedham
Auburn
York Beach
Chelsea
Londonderry
Swansea
Fitchburg
North Falmouth
Braintree
Revere

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