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BOS - CWL

$538 Find cheap flights from Boston to Cardiff

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Cardiff departing on 7/12. 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
0 bags
Thu 6/27
Thu 7/4

Search hundreds of travel sites at once for deals on flights to Cardiff

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Cardiff, 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 Boston to Cardiff, as well as popular online travel agencies
In the last 7 days travelers have searched 42,816,550 times on KAYAK, and here is why:

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Cheap flight deals from Boston to Cardiff (BOS-CWL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Cardiff 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 and deals for you by selecting your travel dates.
Choose your dates
6:20 pm - 7:45 pmBOS-CWL
20h 25m2 stops
10:40 am - 5:00 pmCWL-BOS
11h 20m1 stop
Wed, Nov 6 - Mon, Nov 11
6:55 pm - 4:45 pmBOS-CWL
16h 50m1 stop
9:45 am - 4:40 pmCWL-BOS
11h 55m1 stop
$815KLM
Find Deal
Mon, Sep 2 - Tue, Sep 10
11:05 am - 9:15 amBOS-CWL
17h 10m2 stops
9:45 am - 6:30 pmCWL-BOS
13h 45m1 stop
$820Delta
Find Deal
Mon, Sep 2 - Tue, Sep 10
1:29 pm - 9:15 amBOS-CWL
14h 46m2 stops
9:45 am - 7:42 pmCWL-BOS
14h 57m2 stops
$830Delta
Find Deal
Mon, Sep 2 - Tue, Sep 10
11:19 am - 9:45 amBOS-CWL
17h 26m2 stops
6:00 am - 7:06 pmCWL-BOS
18h 06m2 stops
$832Delta
Find Deal
Wed, Nov 6 - Mon, Nov 11
9:10 pm - 9:40 pmBOS-CWL
19h 30m1 stop
6:00 am - 1:20 pmCWL-BOS
12h 20m1 stop
$919KLM
Find Deal
Wed, Nov 6 - Mon, Nov 11
8:25 pm - 4:45 pmBOS-CWL
15h 20m1 stop
5:15 pm - 1:40 pmCWL-BOS
25h 25m1 stop
$1,203Air France
Find Deal
Fri, Jul 19 - Thu, Jul 25
8:25 pm - 4:45 pmBOS-CWL
15h 20m1 stop
5:15 pm - 6:49 pmCWL-BOS
30h 34m2 stops
$1,285Air France
Find Deal
Fri, Jul 19 - Thu, Jul 25
7:10 pm - 11:30 amBOS-CWL
35h 20m2 stops
12:00 pm - 12:05 pmCWL-BOS
29h 05m2 stops
$1,387British Airways
Find Deal
Fri, Jul 12 - Thu, Jul 25
7:10 pm - 11:30 amBOS-CWL
35h 20m2 stops
12:00 pm - 12:05 pmCWL-BOS
29h 05m2 stops
$1,415British Airways
Find Deal
Fri, Jul 19 - Thu, Jul 25

Flights from Boston to Cardiff - Travel Insights & Trends

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

What is the cheapest month to fly from Boston to Cardiff?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boston to Cardiff, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Boston to Cardiff is October, where tickets cost $698 on average. On the other hand, the most expensive months are December and June, where the average cost of tickets is $1,397 and $1,328 respectively.

Good to know

Low season

February

High season

September

Cheapest flight

$538
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Boston to Cardiff

When to book flights from Boston to Cardiff

Are your dates flexible? Find out the best times to travel from Boston to Cardiff based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 Boston to Cardiff

  • What is the cheapest flight from Boston to Cardiff?

    In the last 3 days, the lowest price for a flight from Boston to Cardiff was $538 for a one-way ticket and $678 for a round-trip.

  • Do I need a passport to fly between Boston and Cardiff?

    Yes, you’ll need a passport to travel to Cardiff from Boston.

  • Which airports will I be using when flying from Boston to Cardiff?

    Boston airport is called Boston Logan Intl and the only airport in Cardiff is Cardiff Wales.

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

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

  • Which airline alliances offer flights from Boston to Cardiff?

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

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

    The two airlines most popular with KAYAK users for flights from Boston to Cardiff are Delta and KLM. With an average price for the route of $921 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $1,008 and an overall rating of 7.8.

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

    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 Boston to Cardiff.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cardiff from Boston 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 Boston to Cardiff?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Cardiff with an airline and back to Boston with another airline. Booking your flights between Boston and CWL can sometimes prove cheaper using this method.

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

    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 Cardiff from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from Boston to Cardiff

 
See real verified KAYAK customer reviews for airlines flying from Boston to Cardiff. 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 Boston to Cardiff? 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.
8.0
DeltaOverall score based on 10502 reviews
7.4Food
8.6Crew
8.2Boarding
7.9Comfort
8.0Entertainment
Airline reviews

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

10.0 ExcellentAnonymous, May 2024MSP - YVR
Read more about Delta reviews

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

Half the bathrooms assigned to economy were out of action

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

The flight was again delayed for more then 2 hours with some lousy explanation regarding the reason of the delay. Although the flight was delayed for more than 2 hours, no refreshments were offered (according to EU regulations). Last 4 flights on KLM - always at least 2 hrs late. So be prepared that you cannot plan anything with KLM.

The flight was delayed for 2 hrs. Because they didn’t have a crew to fly. And it is not a first time for klm to do that. Last time they cancelled my filght and rebooked me 3 days later. Not reliable airline

Booked connecting flights with KlM. My serving flight was the furthest part of the airport. On arrival in Zurich. My two cases arrived but only one carry on belong to my son. His three suitcase didn't arrive. After enquiring we discovered they were still in Amsterdam. We landed at 11.12. We eventually left the airport just after one.

I thought KLM was the best airline but the Lima - Amsterdam was 1 hours late, the Brussels - Amsterdam was 2.30 hours late and the Amsterdam - Lima was 30 minutes late

no issues at all... Kudos to the food. This time was really really good

The food was ok. The crew seemed like they were cranky. I had one guy get mad at me for passing in between the storage area to get to the other toilet. I can understand if it's not allowed but reprimanding me like I'm a student saying "This is the last time!" was not appropriate. During my meal time, there was a French family around me. No problems there but when we usually have meals, they are supposed to put their chair in the upright position. These people did not do it and the steward did not tell them to raise their seat in the upright position. However, I was told to do so! So, me and another person next to me had to eat with the monitor almost touching our faces. Furthermore, a lady in front of me was putting her feet up and preventing another elder passenger from putting her seat back. To make it worse, she was continuously hitting her back into her seat, shaking my monitor while I was watching a movie. A crew member did speak to her about it but then she accused me of pushing her seat forward! The crew member gave me a death stare and told me to stop pushing the seat forward. I did not even touch her seat at all, if I did, she would know it. Her boyfriend also stood up and tried to push her seat even further past the maximum decline to no avail. None of these people were reprimanded but the steward, some bald guy, was extremely friendly with them and did not even try to instruct them to do anything until it was time to land. I resisted the urge to really argue with them because I would have obviously been seen as the aggressor (I have no idea why). I hardly said anything on this flight except "more wine please" and "sorry" if I bumped into someone accidentally. Overall, it was an annoying flight and I had to resist the urge to yell at the steward and the people he was overly friendly with. The happiest moment of this flight was leaving it.

Overall a good experience. We were disappointed when we had to check our carry on due to the plane being full. KLM hadn’t notified us and we had valuable items in the carry on but they still made us check it. Some of the food was great and some was mediocre. Crew is really kind and funny.

The worst airline. Cancelled flight 30 min before boarding and rebooked on flight after 3 days.

I travel frequently. The flight was late again... KLM should really try and be on time

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

Book cheap flights from Boston to Cardiff

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Boston to Cardiff found on KAYAK in the last 72 hours.
7/12Fri
2 stops
56h 30mBOS-CWL
$538
7/12Fri
3 stops
36h 20mBOS-CWL
$552
7/12Fri
1 stopKLM
16h 45mBOS-CWL
$647

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Last minute flights from Boston to Cardiff

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Boston to Cardiff that are departing in the next 10 days.
5/30Thu
multi-stopKLM
15h 25mBOS-CWL
6/24Mon
multi-stopKLM
11h 50mCWL-BOS
$1,297
5/30Thu
multi-stopKLM
19h 10mBOS-CWL
6/24Mon
multi-stopKLM
11h 50mCWL-BOS
$1,299
5/30Thu
multi-stopVirgin Atlantic
15h 25mBOS-CWL
6/24Mon
multi-stopVirgin Atlantic
17h 50mCWL-BOS
$1,304
5/30Thu
multi-stopKLM
11h 40mBOS-CWL
6/24Mon
multi-stopKLM
13h 55mCWL-BOS
$1,307
5/30Thu
multi-stopKLM
13h 10mBOS-CWL
6/24Mon
multi-stopKLM
13h 55mCWL-BOS
$1,733
5/30Thu
multi-stopKLM
13h 10mBOS-CWL
6/24Mon
multi-stopKLM
13h 55mCWL-BOS
$1,735

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Boston - Cardiff Flights

Departure:

Boston (BOS)United States

Destination:

Cardiff (CWL)United Kingdom

Return flight deals:

Cardiff - Boston

Cabin classes:

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