How long is the flight from Cardiff to Boston?

Airlines like KLM fly from Cardiff to Boston in about 17h 14m. The time it takes to get you to your destination can typically vary by up to . The distance from Cardiff to Boston is about 3137 mi.

In terms of precipitation, rainfall in Boston ranges from 78.0 - 101.0 inches per month. March is typically the wettest month, when rainfall can reach 101.0 mm. July is typically the driest time to visit Boston when rainfall is around 78.0 mm.

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

What is the cheapest time of day to fly from CWL to BOS?

When flying from Cardiff to Boston, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 holiday 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.

£605+ Cheap Flights from Cardiff to Boston

Cheap flight deals from Cardiff to Boston

Enter your travel dates to find the best prices.

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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 28 September 2026.

Tue 10/1110:20 -

1 stop32h 53m

Tue 17/1119:25 -

1 stop9h 25m

Deal found 26/9£605

Sun 20/1210:20 -

1 stop13h 41m

Thu 31/1219:25 -

1 stop16h 35m

Deal found 25/9£666

Fri 23/1017:15 -

1 stop30h 15m

Fri 30/1020:20 -

1 stop9h 30m

Deal found 23/9£667

Sun 20/1210:20 -

1 stop13h 41m

Thu 31/1213:04 -

2 stops15h 46m

Deal found 25/9£695

Find flight deals from Cardiff to Boston

Round-trip from	£605

KLM
10/11-17/11
2 total stops
42h 18m total
Cardiff to Boston

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Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Tue 10/11

10:20-14:13

1 stop32h 53m

Boston Logan Intl

Tue 17/11

13:00-09:50

2 stops15h 50m

£612

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Fri 23/10

17:15-18:30

1 stop30h 15m

Boston Logan Intl

Fri 30/10

20:20-09:50

1 stop9h 30m

£667

Fastest return journey

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Sun 20/12

10:20-19:01

1 stop13h 41m

Boston Logan Intl

Thu 31/12

13:04-09:50

2 stops15h 46m

£695

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Sun 20/12

10:20-22:34

2 stops17h 14m

Boston Logan Intl

Thu 31/12

13:04-09:50

2 stops15h 46m

£826

Flights are sorted by cheapest return flights first.

Deals found on 26/9

Sorted by cheapest first

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.

CWL-BOS

Estimated return 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

How long is the flight from Cardiff to Boston?
Airlines like KLM fly from Cardiff to Boston in about 17h 14m. The time it takes to get you to your destination can typically vary by up to . The distance from Cardiff to 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 holiday 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.

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Cardiff to Boston. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Cardiff to Boston?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Boston from Cardiff.

Can Cheapflights find flights from Cardiff to Boston with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Cardiff to Boston, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Cardiff to Boston become cheaper?

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Cheap flights from Cardiff to Boston from £605

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Cardiff to Boston

Cheapest flights from Cardiff to BostonExplore 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 28 September 2026.

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 28 September 2026.

Best flights from Cardiff to BostonDiscover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 September 2026.

Discover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 September 2026.

Last-minute flights from Cardiff to BostonDiscover last-minute flight deals from Cardiff to Boston. Data last updated 28 September 2026 and is based on user searches.

Discover last-minute flight deals from Cardiff to Boston. Data last updated 28 September 2026 and is based on user searches.

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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.

Related info for your journey

How long is the flight from Cardiff to Boston?

Can I find deals for flights from Cardiff to Boston that include hotel bookings?

How can I find direct flights from Cardiff to Boston?

Can I find deals for business class flights from Cardiff to Boston?

Travelling to a place near Boston?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Cardiff to Boston

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Other flights to Boston

Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 28 September 2026.

Complete your trip

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Direct flights to Massachusetts

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Search flights from Cardiff to Boston by cabin class

Find flights from Cardiff to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Cardiff and Boston flights

Browse other Cardiff and Boston flight options. Last updated on 28 September 2026.

Other flights from Cardiff

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How does Cheapflights help users find flights from Cardiff to Boston?

Why should you use Cheapflights to find cheap flight tickets from Cardiff to Boston?

Can Cheapflights find flights from Cardiff to Boston with no change fees?

Can Cheapflights notify me if prices for flights from Cardiff to Boston become cheaper?

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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 28 September 2026.

Best flights from Cardiff to Boston
Discover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 September 2026.

Last-minute flights from Cardiff to Boston
Discover last-minute flight deals from Cardiff to Boston. Data last updated 28 September 2026 and is based on user searches.