How long is the flight from Cardiff to Boston?

Airlines like Delta fly from Cardiff to Boston in about 11h 50m. 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.

£327+ Cheap Flights from Cardiff to Boston

Cheap flight deals from Cardiff to Boston

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 31 August 2026.

Sat 10/1007:30 -

1 stop12h 25m

Sat 17/1021:15 -

1 stop19h 05m

Deal found 26/8£515

Tue 13/1017:15 -

1 stop25h 00m

Tue 20/1016:45 -

1 stop19h 00m

Deal found 30/8£579

Sun 27/917:15 -

1 stop28h 20m

Sun 4/1016:45 -

1 stop11h 30m

Deal found 30/8£580

Thu 10/911:35 -

1 stop31h 05m

Mon 14/923:00 -

2 stops18h 50m

Deal found 26/8£584

Thu 10/909:45 -

1 stop11h 50m

Mon 14/913:32 -

2 stops14h 43m

Deal found 30/8£585

Tue 13/1017:15 -

1 stop28h 21m

Tue 20/1013:35 -

2 stops14h 40m

Deal found 30/8£587

Wed 14/1009:45 -

1 stop11h 51m

Wed 21/1013:35 -

2 stops14h 40m

Deal found 30/8£594

Sun 27/917:15 -

1 stop25h 04m

Sun 4/1021:20 -

2 stops38h 25m

Deal found 30/8£595

Mon 12/1009:45 -

1 stop13h 45m

Mon 19/1018:55 -

1 stop9h 20m

Deal found 28/8£597

Wed 16/909:45 -

2 stops18h 25m

Wed 7/1020:25 -

1 stop15h 20m

Deal found 30/8£598

Find flight deals from Cardiff to Boston

Round-trip from	£515
One-way from	£327

10/10-17/10
2 total stops
31h 30m total
Cardiff to Boston

Search Deals

17/9
2 total stops
27h 05m total
Cardiff to Boston

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Tue 13/10

17:15-16:36

1 stop28h 21m

Boston Logan Intl

Tue 20/10

13:35-09:15

2 stops14h 40m

£587

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Wed 16/9

09:45-16:35

1 stop11h 50m

Boston Logan Intl

Wed 7/10

20:25-16:45

1 stop15h 20m

£594

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Thu 10/9

09:45-16:35

1 stop11h 50m

Boston Logan Intl

Mon 14/9

20:25-16:45

1 stop15h 20m

£594

Fastest return journey

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Mon 12/10

09:45-18:30

1 stop13h 45m

Boston Logan Intl

Mon 19/10

18:55-09:15

1 stop9h 20m

£597

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Wed 14/10

09:45-23:08

2 stops18h 23m

Boston Logan Intl

Wed 21/10

13:35-09:15

2 stops14h 40m

£598

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Mon 12/10

09:45-18:30

1 stop13h 45m

Boston Logan Intl

Thu 29/10

20:20-17:00

1 stop16h 40m

£614

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Mon 12/10

09:45-23:08

2 stops18h 23m

Boston Logan Intl

Thu 29/10

09:10-09:50

2 stops20h 40m

£618

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Thu 10/9

11:35-09:50

3 stops27h 15m

Boston Logan Intl

Mon 14/9

23:00-22:50

2 stops18h 50m

£647

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Sat 10/10

07:30-14:55

1 stop12h 25m

Boston Logan Intl

Sat 17/10

17:25-16:45

2 stops18h 20m

£652

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Fri 16/10

17:15-18:30

1 stop30h 15m

Boston Logan Intl

Mon 26/10

20:20-09:50

1 stop9h 30m

£658

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 12 resultsSorted 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 Delta fly from Cardiff to Boston in about 11h 50m. 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?

Yes! Start tracking prices for Cardiff to Boston flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Cardiff to Boston from £327

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 17/9. 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 31 August 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 31 August 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 31 August 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 31 August 2026.

Last-minute flights from Cardiff to BostonDiscover last-minute flight deals from Cardiff to Boston. Data last updated 31 August 2026 and is based on user searches.

Discover last-minute flight deals from Cardiff to Boston. Data last updated 31 August 2026 and is based on user searches.

One-way flights from Cardiff to BostonSearch for one-way flight options from Cardiff to Boston. Find affordable one-way fares based on user searches. Data last updated 31 August 2026.

Search for one-way flight options from Cardiff to Boston. Find affordable one-way fares based on user searches. Data last updated 31 August 2026.

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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

See prices for flight routes from nearby airports that may be better suited for you.

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 31 August 2026.

Complete your trip

Complete your trip to Boston by adding a car hire and/or hotel booking to your travel itinerary.

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 31 August 2026.

Other flights from Cardiff

Browse through other flights departing from Cardiff. Flights are based on user searches made on Cheapflights and were last updated on 31 August 2026.

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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 31 August 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 31 August 2026.

Last-minute flights from Cardiff to Boston
Discover last-minute flight deals from Cardiff to Boston. Data last updated 31 August 2026 and is based on user searches.

One-way flights from Cardiff to Boston
Search for one-way flight options from Cardiff to Boston. Find affordable one-way fares based on user searches. Data last updated 31 August 2026.