Find flights
When to book
Airlines
FAQs

Cheap flights from Boston to Cardiff from £326

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CWL
20 Apr — 27 Apr1
1 adult

Cheap flight deals from Boston to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Cardiff (CWL). 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 15 April 2025.

Round-trip from

£571

One-way from

£326

Popular in

July

Cheapest in

February

Average price

£939
Virgin Atlantic
  • Virgin Atlantic
  • 27/4-12/5
  • 2 total stops
  • 62h 05m total
  • Boston to Cardiff
Search Deals
Delta
  • Delta
  • 13/5
  • 1 total stop
  • 32h 00m total
  • Boston to Cardiff
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£127 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Boston to Cardiff

Cheapest flights from Boston to Cardiff
Explore the most affordable flight options available from Boston to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Sun 27/420:15BOS - CWL
1 stop32h 00mVirgin Atlantic
Mon 12/517:15CWL - BOS
1 stop30h 05mVirgin Atlantic
Deal found 15/4£571
Tue 13/520:15BOS - CWL
1 stop15h 30mKLM
Mon 19/517:15CWL - BOS
1 stop30h 05mKLM
Deal found 15/4£586
Sun 27/418:00BOS - CWL
2 stops17h 45mDelta
Mon 12/509:50CWL - BOS
1 stop32h 45mDelta
Deal found 15/4£587
Mon 28/722:00BOS - CWL
2 stops32h 30mAer Lingus
Mon 4/812:00CWL - BOS
2 stops34h 15mAer Lingus
Deal found 14/4£740
Fri 30/522:50BOS - CWL
2 stops30h 45mMultiple Airlines
Fri 6/612:25CWL - BOS
1 stop11h 20mMultiple Airlines
Deal found 15/4£753

Cheapflights Fare Finder

Customise your flight search to find flights from Boston to Cardiff 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 858,174 searches. Data last updated 15 April 2025.
Use the filters below to find and compare flights from Boston to Cardiff that are best for you.

Fly from

Boston

Fly to

Cardiff

Route

Depart

Return

Price

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 27/4

20:15-09:15

1 stop32h 00m

Cardiff Wales

Mon 12/5

17:15-18:20

1 stop30h 05m

£571

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 27/4

18:00-16:45

2 stops17h 45m

Cardiff Wales

Mon 12/5

09:50-13:35

1 stop32h 45m

£587

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 13/5

16:40-09:15

1 stop11h 35m

Cardiff Wales

Mon 19/5

09:50-13:35

1 stop32h 45m

£590

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 28/7

22:00-11:30

2 stops32h 30m

Cardiff Wales

Mon 4/8

12:00-17:15

2 stops34h 15m

£740

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Fri 30/5

22:50-10:35

2 stops30h 45m

Cardiff Wales

Fri 6/6

12:25-18:45

1 stop11h 20m

£753

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Tue 13/5

20:15-09:15

1 stop32h 00m

£326

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Best time to book a flight from Boston to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Boston with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from Boston to Cardiff

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

Currently, July is the cheapest month in which you can book a flight from Boston to Cardiff (average of £169). Flying from Boston to Cardiff in December is currently the most expensive (average of £263). 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 Cardiff by month

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

In terms of precipitation, rainfall in Cardiff ranges from 50.0 - 90.0 inches per month. January is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Cardiff when rainfall is around 50.0 mm.

Temperature in Cardiff by month

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

If weather is an important factor for your trip to Cardiff, 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 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Cardiff

Get insights into the airlines that provide service to Cardiff. 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 Cardiff. Reviews last updated 15 April 2025.
Delta
8.0
Very Good
7,917 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,917 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,063 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Boston to Cardiff. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Boston to Cardiff round-trip?

    Cheapflights users have booked flights from Boston to Cardiff round-trip from £571. Other airlines that can offer you cheap pricing are KLM, from £586, and Delta, from £587. Virgin Atlantic is 25% cheaper than the average price of flights available within the next 90 days to this destination.

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

    Yes. In addition to deals on Boston to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Cardiff.

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

    Yes. Cheapflights offers flight deals from Boston to Cardiff 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 Boston to Cardiff?

    Currently, July is the cheapest month in which you can book a flight from Boston to Cardiff (average of £169). Flying from Boston to Cardiff in December is currently the most expensive (average of £263). 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

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Barry
Bridgend

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.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Boston to Cardiff flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights helps you find that perfect flight to Cardiff from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from Boston to Cardiff with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on Boston to Cardiff flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.
Site
©2025 Cheapflights