BOS - CWL

$488 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 5/12. 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.
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KAYAK searches 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
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Flights Deals

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.

Recent round-trip flight deals from Boston to Cardiff

KAYAK's recommended round-trip deals from the most popular airlines that fly from Boston to Cardiff.
Discover the best prices for you by selecting your travel dates on KAYAK.
KLM Logo
6:35 pm - 4:45 pmBOS-CWL
17h 10m1 stop
KLM Logo
5:15 pm - 1:35 pmCWL-BOS
25h 20m1 stop
$777KLM
Find Deal
Tue, May 13 - Mon, May 19
KLM Logo
8:15 pm - 5:05 pmBOS-CWL
15h 50m1 stop
KLM Logo
5:15 pm - 4:35 pmCWL-BOS
28h 20m1 stop
$795KLM
Find Deal
Fri, Aug 15 - Mon, Aug 25
Delta Logo
1:00 pm - 9:15 amBOS-CWL
15h 15m2 stops
Delta Logo
9:50 am - 4:25 pmCWL-BOS
11h 35m1 stop
$800Delta
Find Deal
Tue, May 13 - Mon, May 19
Delta Logo
1:00 pm - 9:15 amBOS-CWL
15h 15m2 stops
Delta Logo
9:50 am - 7:06 pmCWL-BOS
14h 16m2 stops
$810Delta
Find Deal
Tue, May 13 - Mon, May 19
Delta Logo
8:40 pm - 5:05 pmBOS-CWL
15h 25m2 stops
Delta Logo
9:50 am - 4:35 pmCWL-BOS
11h 45m1 stop
$818Delta
Find Deal
Fri, Aug 15 - Mon, Aug 25
Virgin Atlantic Logo
4:50 pm - 9:15 amBOS-CWL
11h 25m1 stop
Virgin Atlantic Logo
5:20 pm - 7:21 amCWL-BOS
19h 01m2 stops
$905Virgin Atlantic
Find Deal
Sun, Aug 17 - Sun, Aug 24
Virgin Atlantic Logo
6:54 pm - 4:50 pmBOS-CWL
16h 56m2 stops
Virgin Atlantic Logo
5:20 pm - 7:21 amCWL-BOS
19h 01m2 stops
$1,043Virgin Atlantic
Find Deal
Sat, Aug 2 - Sun, Aug 10
 Logo
7:25 am - 11:30 amBOS-CWL
23h 05m2 stops
 Logo
12:00 pm - 8:10 pmCWL-BOS
37h 10m2 stops
$1,493
Find Deal
Wed, Jul 2 - Mon, Jul 7
 Logo
7:25 am - 11:30 amBOS-CWL
23h 05m2 stops
 Logo
12:00 pm - 5:10 pmCWL-BOS
34h 10m2 stops
$1,532
Find Deal
Wed, Jul 2 - Mon, Jul 7
ITA Airways Logo
5:05 pm - 5:05 pmBOS-CWL
19h 00m2 stops
ITA Airways Logo
9:50 am - 1:40 pmCWL-BOS
32h 50m2 stops
$1,546ITA Airways
Find Deal
Fri, Jun 27 - Sun, Jun 29
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KAYAK's insights & trends for Boston to Cardiff flights

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.

Which airlines provide the cheapest flights from Boston to Cardiff?

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 round-trip tickets from Boston to Cardiff were found on KLM ($777) and Delta ($800).

Good to know

Low seasonFebruary
High seasonMay
Cheapest flight$488
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 0% 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 $488 for a one-way ticket and $777 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 is the only airline alliance operating flights between Boston and Cardiff.

  • 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 $975 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 $1,041 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.

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 7936 reviews
8.2Boarding
7.3Food
7.9Comfort
7.9Entertainment
8.5Crew
Airline reviews

Our bag was lost so that made unnecessary chaos On our trip

6.0 GoodBarbara, Apr 2025JFK - FCO
Read more Delta reviews

Our bag was lost so that made unnecessary chaos On our trip

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

It was an overnight flight and I desperately needed coffee before we landed, but Delta does only one beverage service, and that is shortly after takeoff, not before landing at 5 am.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

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.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

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

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

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.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

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

Information on your arrival and departure airports

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