CWL - BOS

£439 Find Cheap Flights from Cardiff to Boston

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Cardiff to Boston departing on 29/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Boston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cardiff to Boston, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cardiff to Boston, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Cardiff to Boston (CWL-BOS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Cardiff to Boston that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Cardiff to Boston

Wed, 29 Oct - Wed, 5 Nov
Virgin Atlantic Logo
10:20 - 23:49CWL-BOS
17h 29m2 stops
Virgin Atlantic Logo
20:55 - 16:45BOS-CWL
38h 50m2 stops
£439Virgin Atlantic
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Wed, 29 Oct - Wed, 5 Nov
Delta Logo
10:20 - 19:55CWL-BOS
13h 35m1 stop
Delta Logo
19:10 - 09:50BOS-CWL
9h 40m1 stop
£442Delta
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Wed, 8 Oct - Wed, 29 Oct
British Airways Logo
12:00 - 22:40CWL-BOS
15h 40m2 stops
British Airways Logo
22:35 - 08:05BOS-CWL
29h 30m2 stops
£646British Airways
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Wed, 29 Oct - Wed, 5 Nov
 Logo
10:20 - 15:35CWL-BOS
33h 15m3 stops
 Logo
17:10 - 12:25BOS-CWL
14h 15m2 stops
Wed, 29 Oct - Wed, 5 Nov
 Logo
10:20 - 15:35CWL-BOS
33h 15m3 stops
 Logo
21:20 - 08:05BOS-CWL
29h 45m3 stops
Fri, 19 Dec - Fri, 2 Jan
KLM Logo
10:20 - 18:55CWL-BOS
13h 35m1 stop
KLM Logo
20:50 - 16:55BOS-CWL
15h 05m1 stop
£967KLM
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Fri, 19 Dec - Fri, 2 Jan
Delta Logo
10:20 - 22:29CWL-BOS
17h 09m2 stops
Delta Logo
19:10 - 09:50BOS-CWL
9h 40m1 stop
£1,075Delta
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Fri, 19 Dec - Fri, 2 Jan
 Logo
19:45 - 13:50CWL-BOS
23h 05m2 stops
 Logo
21:20 - 20:10BOS-CWL
41h 50m2 stops
£1,210
Find Deal
Fri, 19 Dec - Fri, 2 Jan
 Logo
19:45 - 13:50CWL-BOS
23h 05m2 stops
 Logo
21:20 - 20:10BOS-CWL
41h 50m2 stops
£1,239
Find Deal

Everything you should know

Top airlines
Virgin Atlantic
Cheapest • from £439 (return)
KLM
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest return fare
£439
Virgin Atlantic
Wed 29/10Wed 5/11
CWL - BOS • 2 stops
Cheapest one-way flight
Multiple Airlines
Mon 15/9
CWL - BOS • multi-stop
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Boston!
Booking Insights

KAYAK's insights & trends for Cardiff to Boston flights

Get data-powered insights and trends into flights from Cardiff to Boston to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Cardiff to Boston?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest return tickets from Cardiff to Boston were found on Virgin Atlantic (£439) and Delta (£442).

Good to know - Cheap tickets from Cardiff to Boston

Low seasonJune
Cheapest flight£439
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly (43% more expensive on average)
Flight from Cardiff to Boston

When to book flights from Cardiff to Boston

Are your dates flexible? Find out the best times to travel from Cardiff to Boston based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Cardiff to Boston

  • What is the cheapest flight from Cardiff to Boston?

    In the last 3 days, the lowest price for a flight from Cardiff to Boston was £597 for a return ticket.

  • Which aircraft models fly most regularly from Cardiff to Boston?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Cardiff to Boston?

    SkyTeam, and oneworld are the airline alliances operating flights between Cardiff and Boston, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Cardiff to Boston, KLM or Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from Cardiff to Boston are KLM and Virgin Atlantic. With an average price for the route of £506 and an overall rating of 7.8, KLM is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of £720 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Cardiff to Boston?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Cardiff to Boston.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Cardiff to Boston?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boston from Cardiff is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Cardiff to Boston?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Boston with an airline and back to Cardiff with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Cardiff to Boston?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boston from Cardiff up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Cardiff to Boston

 
See real verified KAYAK customer reviews for airlines flying from Cardiff to Boston. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Cardiff to Boston? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1385 reviews
8.4Crew
7.8Boarding
7.2Entertainment
7.3Food
7.7Comfort
Airline reviews

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

2.0 MediocrePeter, Aug 2025SAN - AMS
Read more KLM reviews

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

The crew was excellent as ever on Virgin. The special meal was poor unfortunately. More significantly when we arrived at Manchester Airport there was no air bridge provided and we had to exit the plane down a rickety stair case. This is unacceptable for a transatlantic flight. Whilst I understand that this is the airport’s fault at the end of the day the airline is responsible for our transportation and needs to do something.

Super friendly and helpful staff, from check-in desk to cabin crew.

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

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