HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Boston

$397+ 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 6/13. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Cardiff to Boston with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$674
(Mytrip)

One-way from

$397
(Kiwi.com)

Popular in

May

Cheapest in

September

Average price

$688
Provider with most accurate pricing for Cardiff Wales-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Cardiff Wales-Boston Logan Intl flights.
Search Deals
From Cardiff Wales to Boston Logan Intl
Search Deals
One-way flight from Cardiff Wales to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($66 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 3, 2025.

This Mytrip deal was found by Cheapflights users on 4/2. 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.
Sat 5/179:00 amCWL - BOS
1 stop10h 40mMultiple Airlines
Sat 5/245:30 pmBOS - CWL
1 stop12h 05mMultiple Airlines
Deal found 4/2$674
This KLM deal was found by Cheapflights users on 4/2. 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.
Sat 5/179:45 amCWL - BOS
2 stops14h 21mKLM
Sat 5/244:40 pmBOS - CWL
1 stop11h 35mKLM
Deal found 4/2$704

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 April 3, 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

Sat 5/17

9:00 am-2:40 pm

1 stop10h 40m

Boston Logan Intl

Sat 5/24

5:30 pm-10:35 am

1 stop12h 05m

$674

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 5/17

9:45 am-7:06 pm

2 stops14h 21m

Boston Logan Intl

Sat 5/24

4:40 pm-9:15 am

1 stop11h 35m

$704

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 6/13

8:55 pm-9:05 pm

3 stops53h 10m

$397

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 7/5

7:20 pm-9:15 pm

2 stops30h 55m

$441

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

  • Most accurate provider: When it comes to deals on Cardiff-Boston flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Cardiff-Boston flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.
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.

Rainfall in Boston by month

Plan your trip to Boston by taking into account the average rainfall totals by month.

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.

Temperature in Boston by month

Plan your trip to Boston by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated April 3, 2025.
KLM
7.8
Good
1,323 reviews

Overall

7.8

Entertainment

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,323 reviews
KLM
7.8
Good
1,323 reviews

Overall

7.8

Entertainment

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Vueling
7.1
Good
1,149 reviews
KLM
7.8
Good
1,323 reviews

Overall

7.8

Entertainment

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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.

  • What is the cheapest airline to fly from Cardiff to Boston round-trip?

    Cheapflights users have booked flights from Cardiff to Boston round-trip from $704. KLM is priced at 15% lower than the current average price of a flight leaving 3 months from now.

  • 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 Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Warwick
Marlborough
Waltham
Cambridge
Framingham
Chestnut Hill
Seekonk
Randolph
Brockton
Lowell
West Yarmouth
Woburn
Somerville
Saco
Burlington
Smithfield
Salem
Chelsea
Seabrook
Brookline

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Cardiff to Boston

See prices for flight routes from nearby airports that may be better suited for you.
Manchester to Boston flights
Bristol to Boston flights
Manchester to Hartford flights
Bristol to Hartford flights
Cardiff to Hartford flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.