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Cheap flights from Boston to Cardiff from £320

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 27/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — CWL
18 Jun — 25 Jun1
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 13 June 2025.

Round-trip from

£497

One-way from

£320

Popular in

June

Cheapest in

February

Average price

£1,294
13/7-20/7
  • 13/7-20/7
  • 4 total stops
  • 55h 10m total
  • Boston to Cardiff
Search Deals
Delta
  • Delta
  • 27/7
  • 1 total stop
  • 17h 05m total
  • Boston to Cardiff
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£157 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£37 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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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 13 June 2025.

Sun 13/712:15BOS - CWL
2 stops19h 30mMultiple Airlines
Sun 20/711:00CWL - BOS
2 stops35h 40mMultiple Airlines
Deal found 11/6£497
Mon 28/718:40BOS - CWL
1 stop17h 05mKLM
Fri 8/809:50CWL - BOS
1 stop13h 35mKLM
Deal found 12/6£515
Mon 28/710:00BOS - CWL
2 stops18h 15mVirgin Atlantic
Fri 8/817:15CWL - BOS
2 stops22h 40mVirgin Atlantic
Deal found 12/6£526
Sat 13/911:00BOS - CWL
2 stops17h 15mDelta
Sun 21/909:50CWL - BOS
1 stop13h 35mDelta
Deal found 12/6£573

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 13 June 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 13/7

12:15-12:45

2 stops19h 30m

Cardiff Wales

Sun 20/7

11:00-17:40

2 stops35h 40m

£497

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 28/7

18:40-16:45

1 stop17h 05m

Cardiff Wales

Fri 8/8

09:50-18:25

1 stop13h 35m

£515

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Mon 28/7

10:00-09:15

2 stops18h 15m

Cardiff Wales

Fri 8/8

17:15-10:55

2 stops22h 40m

£526

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sat 13/9

11:00-09:15

2 stops17h 15m

Cardiff Wales

Sun 21/9

09:50-18:25

1 stop13h 35m

£573

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Sun 27/7

18:40-16:45

1 stop17h 05m

£320

BostonCardiff

BOS - CWL

BOSCWL

Boston Logan Intl

Wed 2/7

16:45-09:15

1 stop11h 30m

£1,131

Flights are sorted by cheapest return flights first.

Deals found on 12/6

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 13 June 2025.
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very Good
7,950 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
652 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 £515. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £526, and Delta, from £573. KLM is 35% 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

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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.

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