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$597+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$597
(TravelUp)

Popular in

July

Cheapest in

June

Average price

$642
From Cardiff Wales to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($174 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 2025.

This TravelUp deal was found by Cheapflights users on 9/14. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:20 amCWL - BOS
2 stops17h 29mVirgin Atlantic
Wed 11/58:55 pmBOS - CWL
2 stops38h 50mVirgin Atlantic
Deal found 9/14$597
This Delta deal was found by Cheapflights users on 9/14. 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.
Wed 10/2910:20 amCWL - BOS
1 stop13h 35mDelta
Wed 11/57:10 pmBOS - CWL
1 stop9h 40mDelta
Deal found 9/14$601
This British Airways deal was found by Cheapflights users on 9/15. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:00 pmCWL - BOS
2 stops15h 40mBritish Airways
Wed 10/2910:35 pmBOS - CWL
2 stops29h 30mBritish Airways
Deal found 9/15$878
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Wed 10/2910:20 amCWL - BOS
3 stops33h 15mMultiple Airlines
Wed 11/55:10 pmBOS - CWL
2 stops14h 15mMultiple Airlines
Deal found 9/14$901
This KLM deal was found by Cheapflights users on 9/15. 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 stop15h 05mKLM
Deal found 9/15$1,314
This Delta deal was found by Cheapflights users on 9/15. 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 09mDelta
Fri 1/27:10 pmBOS - CWL
1 stop9h 40mDelta
Deal found 9/15$1,461
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:45 pmCWL - BOS
2 stops23h 05mMultiple Airlines
Fri 1/29:20 pmBOS - CWL
2 stops41h 50mMultiple Airlines
Deal found 9/15$1,644

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 September 15, 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

Wed 10/29

10:20 am-11:49 pm

2 stops17h 29m

Boston Logan Intl

Wed 11/5

8:50 pm-4:55 pm

1 stop15h 05m

$597

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 10/29

10:20 am-7:55 pm

1 stop13h 35m

Boston Logan Intl

Wed 11/5

7:10 pm-9:50 am

1 stop9h 40m

$601

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 10/8

12:00 pm-10:40 pm

2 stops15h 40m

Boston Logan Intl

Wed 10/29

10:35 pm-8:05 am

2 stops29h 30m

$878

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 10/29

10:20 am-3:35 pm

3 stops33h 15m

Boston Logan Intl

Wed 11/5

5:10 pm-12:25 pm

2 stops14h 15m

$901

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 12/19

10:20 am-6:55 pm

1 stop13h 35m

Boston Logan Intl

Fri 1/2

8:50 pm-9:50 am

1 stop32h 00m

$1,314

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 12/19

10:20 am-10:29 pm

2 stops17h 09m

Boston Logan Intl

Fri 1/2

7:10 pm-9:50 am

1 stop9h 40m

$1,460

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 13h 35m. Fly via Virgin Atlantic, Delta, or British Airways 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
Cambridge
Medford
Hampton Beach
Watertown
Seabrook
Seekonk
Lincoln
Lowell
Smithfield
Cranston
Chestnut Hill
Chelsea
Warwick
Peabody
Quincy
York Beach
Swansea
Waltham
Saugus
Burlington

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