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$503+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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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 August 18, 2025.

Round-trip from

$638
(Delta)

One-way from

$503
(Vueling Global)

Popular in

July

Cheapest in

June

Average price

$1,101
From Cardiff Wales to Boston Logan Intl
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One-way flight from Cardiff Wales to Boston Logan Intl
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Highest demand for flights based on searches. 20% potential increase in price ($191 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 18, 2025.

This Delta deal was found by Cheapflights users on 8/17. 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.
Mon 9/159:50 amCWL - BOS
1 stop11h 40mDelta
Mon 9/228:50 pmBOS - CWL
2 stops14h 55mDelta
Deal found 8/17$638
This Mytrip deal was found by Cheapflights users on 8/17. 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.
Mon 9/155:15 pmCWL - BOS
3 stops30h 35mMultiple Airlines
Mon 9/2211:35 pmBOS - CWL
2 stops11h 20mMultiple Airlines
Deal found 8/17$734
This Mytrip deal was found by Cheapflights users on 8/16. 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 9/309:50 amCWL - BOS
3 stops33h 30mMultiple Airlines
Tue 10/79:25 pmBOS - CWL
2 stops13h 10mMultiple Airlines
Deal found 8/16$884
This Trip.com deal was found by Cheapflights users on 8/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:25 pmCWL - BOS
2 stops30h 30mMultiple Airlines
Fri 1/29:20 pmBOS - CWL
2 stops31h 30mMultiple Airlines
Deal found 8/17$1,181
This Delta deal was found by Cheapflights users on 8/18. 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
1 stop13h 35mDelta
Fri 1/28:50 pmBOS - CWL
1 stop15h 05mDelta
Deal found 8/18$1,241

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 August 18, 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

Mon 9/15

9:50 am-4:30 pm

1 stop11h 40m

Boston Logan Intl

Mon 9/22

8:50 pm-4:45 pm

2 stops14h 55m

$638

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 9/15

5:15 pm-1:40 pm

1 stop25h 25m

Boston Logan Intl

Mon 9/22

4:50 pm-9:15 am

1 stop11h 25m

$638

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 9/30

5:15 pm-1:40 pm

1 stop25h 25m

Boston Logan Intl

Tue 10/7

4:50 pm-9:15 am

1 stop11h 25m

$638

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 9/30

9:50 am-6:20 pm

1 stop13h 30m

Boston Logan Intl

Tue 10/7

1:15 pm-9:15 am

2 stops15h 00m

$638

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 9/15

5:15 pm-6:50 pm

3 stops30h 35m

Boston Logan Intl

Mon 9/22

11:35 pm-3:55 pm

2 stops11h 20m

$734

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 9/30

9:50 am-2:20 pm

3 stops33h 30m

Boston Logan Intl

Tue 10/7

9:25 pm-3:35 pm

2 stops13h 10m

$884

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 12/19

5:25 pm-6:55 pm

2 stops30h 30m

Boston Logan Intl

Fri 1/2

9:20 pm-9:50 am

2 stops31h 30m

$1,181

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 12/19

10:20 am-6:55 pm

1 stop13h 35m

Boston Logan Intl

Fri 1/2

7:10 pm-4:55 pm

1 stop16h 45m

$1,241

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 9/2

7:00 pm-9:15 pm

2 stops31h 15m

$503

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 9/2

9:50 am-6:25 pm

1 stop13h 35m

$1,917

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

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, January is the cheapest month in which you can book a flight from Cardiff to Boston (average of $218). Flying from Cardiff to Boston in July is currently the most expensive (average of $311). 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 11h 40m. Fly via Delta or KLM 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, January is the cheapest month in which you can book a flight from Cardiff to Boston (average of $218). Flying from Cardiff to Boston in July is currently the most expensive (average of $311). 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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Hampton Beach
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Lowell
Lincoln
Smithfield
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Warwick
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Burlington
Braintree

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