How long is the flight from Cardiff to Boston?

There are many flights that can get you from Cardiff to Boston in 25h 43m. Fly via KLM or Virgin Atlantic to get the fastest option. The distance between Cardiff and Boston is about 3137 mi.

In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.

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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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.

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.

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.

$746+ Cheap Flights from Cardiff to Boston

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Cheap flight deals from Cardiff to Boston

Cheapest

Best

Last-minute

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 24, 2026.

Fri 11/65:30 pm -

2 stops30h 35m

Fri 11/135:15 pm -

1 stop9h 35m

Deal found 9/22

$746

Thu 11/125:30 pm -

1 stop25h 43m

Mon 11/168:55 pm -

1 stop15h 05m

Deal found 9/20

$788

Fri 11/610:20 am -

2 stops17h 45m

Fri 11/135:07 pm -

2 stops18h 53m

Deal found 9/22

$793

Thu 11/125:30 pm -

3 stops29h 20m

Mon 11/167:50 pm -

3 stops33h 00m

Deal found 9/20

$841

Fri 10/235:15 pm -

1 stop30h 15m

Fri 10/308:20 pm -

1 stop9h 30m

Deal found 9/23

$883

Best flights from Cardiff to Boston
Discover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Mon 2/85:30 pm -

1 stop25h 43m

Sun 2/146:00 am -

2 stops22h 50m

Deal found 9/19

$776

Fri 11/610:20 am -

1 stop13h 41m

Fri 11/137:25 pm -

1 stop16h 35m

Deal found 9/22

$781

Thu 11/125:30 pm -

1 stop25h 43m

Mon 11/165:05 pm -

2 stops18h 55m

Deal found 9/20

$788

Fri 11/610:20 am -

2 stops17h 45m

Fri 11/135:07 pm -

2 stops18h 53m

Deal found 9/22

$793

Fri 10/235:15 pm -

1 stop30h 15m

Fri 10/308:20 pm -

1 stop9h 30m

Deal found 9/23

$883

Mon 2/85:30 pm -

2 stops33h 56m

Sun 2/148:45 pm -

2 stops56h 05m

Deal found 9/19

$824

Thu 11/125:30 pm -

2 stops25h 25m

Mon 11/169:20 pm -

3 stops33h 25m

Deal found 9/20

$884

Mon 2/85:30 pm -

3 stops25h 15m

Sun 2/1411:05 am -

3 stops48h 55m

Deal found 9/19

$1,015

Last-minute flights from Cardiff to Boston
Discover last-minute flight deals from Cardiff to Boston. Data last updated September 24, 2026 and is based on user searches.

Fri 10/25:15 pm -

2 stops31h 35m

Tue 10/69:10 am -

2 stops19h 05m

Deal found 9/19

$2,032

Fri 10/25:15 pm -

1 stop28h 21m

Tue 10/64:45 pm -

1 stop19h 00m

Deal found 9/19

$3,140

Fri 10/1612:00 pm -

2 stops15h 35m

Tue 10/207:10 am -

2 stops23h 20m

Deal found 9/22

$3,048

Fri 10/235:15 pm -

1 stop30h 15m

Fri 10/308:20 pm -

1 stop9h 30m

Deal found 9/23

$883

Find flight deals from Cardiff to Boston

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$746 (Mytrip)

Provider with most accurate pricing for Cardiff Wales-Boston Logan Intl flight deals.

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Provider most trusted by Cheapflights users for Cardiff Wales-Boston Logan Intl flights.

Search Deals

From Cardiff Wales to Boston Logan Intl

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Mon 2/8

5:30 pm-2:13 pm

1 stop25h 43m

Boston Logan Intl

Sun 2/14

6:00 am-9:50 am

2 stops22h 50m

$776

Quickest round-trip

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Fri 11/6

10:20 am-7:01 pm

1 stop13h 41m

Boston Logan Intl

Fri 11/13

7:25 pm-5:00 pm

1 stop16h 35m

$781

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Thu 11/12

5:30 pm-2:13 pm

1 stop25h 43m

Boston Logan Intl

Mon 11/16

5:05 pm-5:00 pm

2 stops18h 55m

$788

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Fri 11/6

10:20 am-11:05 pm

2 stops17h 45m

Boston Logan Intl

Fri 11/13

5:07 pm-5:00 pm

2 stops18h 53m

$793

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Mon 2/8

5:30 pm-10:26 pm

2 stops33h 56m

Boston Logan Intl

Sun 2/14

8:45 pm-9:50 am

2 stops56h 05m

$824

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Fri 10/23

5:15 pm-6:30 pm

1 stop30h 15m

Boston Logan Intl

Fri 10/30

8:20 pm-9:50 am

1 stop9h 30m

$883

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Thu 11/12

5:30 pm-1:55 pm

2 stops25h 25m

Boston Logan Intl

Mon 11/16

9:20 pm-11:45 am

3 stops33h 25m

$884

CardiffBoston

CWL Cardiff Wales - BOS Boston Logan Intl

CWLBOS

Cardiff Wales

Mon 2/8

5:30 pm-1:45 pm

3 stops25h 15m

Boston Logan Intl

Sun 2/14

11:05 am-5:00 pm

3 stops48h 55m

$1,015

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/19

Sorted by cheapest first

Compare providers for flights from Cardiff to Boston

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Cardiff to Boston in September.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy1 star	Trust 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.

CWL-BOS

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

How long is the flight from Cardiff to Boston?
There are many flights that can get you from Cardiff to Boston in 25h 43m. Fly via KLM or Virgin Atlantic 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.

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$746+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Cardiff to Boston with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 September 24, 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 September 24, 2026.

Best flights from Cardiff to BostonDiscover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Discover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Last-minute flights from Cardiff to BostonDiscover last-minute flight deals from Cardiff to Boston. Data last updated September 24, 2026 and is based on user searches.

Discover last-minute flight deals from Cardiff to Boston. Data last updated September 24, 2026 and is based on user searches.

Find flight deals from Cardiff to Boston

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Most trusted provider

Round-trip from

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Use the filters below to find and compare flights from Cardiff to Boston that are best for you.

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 September.

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?

Traveling 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 September 24, 2026.

Complete your trip

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

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 September 24, 2026.

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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 September 24, 2026.

Best flights from Cardiff to Boston
Discover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Last-minute flights from Cardiff to Boston
Discover last-minute flight deals from Cardiff to Boston. Data last updated September 24, 2026 and is based on user searches.