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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
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

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 March 13, 2026.

This TravelUp deal was found by Cheapflights users on 3/10. 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 4/229:45 am
CWL
-
BOS
1 stop13h 45m
KLM
Wed 4/294:35 pm
BOS
-
CWL
1 stop19h 10m
KLM
Deal found 3/10$754
This TravelUp deal was found by Cheapflights users on 3/9. 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 5/69:45 am
CWL
-
BOS
1 stop11h 40m
Air France
Wed 5/134:35 pm
BOS
-
CWL
1 stop19h 10m
Air France
Deal found 3/9$767
This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:45 am
CWL
-
BOS
1 stop11h 40m
KLM
Wed 5/139:05 am
BOS
-
CWL
2 stops19h 10m
KLM
Deal found 3/9$778
This Delta deal was found by Cheapflights users on 3/10. 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 4/229:45 am
CWL
-
BOS
2 stops18h 42m
Delta
Wed 4/2912:30 pm
BOS
-
CWL
2 stops15h 45m
Delta
Deal found 3/10$808
This TravelUp deal was found by Cheapflights users on 3/9. 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 5/65:15 pm
CWL
-
BOS
2 stops35h 22m
Virgin Atlantic
Wed 5/139:05 am
BOS
-
CWL
2 stops19h 10m
Virgin Atlantic
Deal found 3/9$894
This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:45 am
CWL
-
BOS
2 stops29h 04m
Multiple Airlines
Thu 4/304:35 pm
BOS
-
CWL
1 stop19h 10m
Multiple Airlines
Deal found 3/9$1,044

Find 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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$754
(TravelUp)

One-way from

$397
(Kiwi.com)
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

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 March 13, 2026.
Use the filters below to find and compare flights from Cardiff to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 4/22

9:45 am-6:30 pm

1 stop13h 45m

Boston Logan Intl

Wed 4/29

4:35 pm-4:45 pm

1 stop19h 10m

$754
Quickest round-trip

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 5/6

9:45 am-4:25 pm

1 stop11h 40m

Boston Logan Intl

Wed 5/13

9:05 am-9:15 am

2 stops19h 10m

$778

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 4/22

9:45 am-11:27 pm

2 stops18h 42m

Boston Logan Intl

Wed 4/29

12:30 pm-9:15 am

2 stops15h 45m

$808

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Wed 5/6

5:15 pm-11:37 pm

2 stops35h 22m

Boston Logan Intl

Wed 5/13

9:05 am-9:15 am

2 stops19h 10m

$894

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 4/23

9:45 am-9:49 am

2 stops29h 04m

Boston Logan Intl

Thu 4/30

4:35 pm-4:45 pm

1 stop19h 10m

$1,044
Cheapest one-way
Quickest one-way

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 4/30

12:00 pm-8:05 pm

2 stops13h 05m

$1,030

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 3/30

9:45 am-1:13 pm

1 stop32h 28m

$1,998

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Thu 3/26

10:20 am-2:20 pm

1 stop32h 00m

$2,356

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 3/27

10:20 am-6:20 pm

2 stops36h 00m

$2,361

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sat 3/28

10:20 am-2:11 pm

2 stops31h 51m

$2,361

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Sorted by cheapest first
  • 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.
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, March is the cheapest month in which you can book a flight from Cardiff to Boston (average of $449). Flying from Cardiff to Boston in December is currently the most expensive (average of $741). 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 45m. Fly via KLM 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.

  • What is the cheapest month to book a flight from Cardiff to Boston?

    Currently, March is the cheapest month in which you can book a flight from Cardiff to Boston (average of $449). Flying from Cardiff to Boston in December is currently the most expensive (average of $741). 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
Medford
Cambridge
Concord
Hampton Beach
Watertown
Seekonk
Brockton
Seabrook
Cranston
Chelsea
Smithfield
Lincoln
Warwick
Peabody
Waltham
York Beach
Londonderry
Swansea
Old Orchard Beach
Quincy

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

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.