BOS - CWL

$287 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 6/23. 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, 0 bags

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$697
Typical prices: $1,198-$780
Multiple Airlines
Wed 8/5Wed 8/12
BOS - CWL • 1 stop
Cheapest one-way
$287
Multiple Airlines
Tue 6/23
BOS - CWL • 2 stops
Top airlines
KLM
Cheapest • from $1,082 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Boston and Cardiff. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Dublin (DUB)
Cheapest • Avg $566 (round-trip)
Dublin (DUB)
Shortest trip • 9h 25m (one-way)
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 33% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Cardiff!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Cardiff

Wed, Aug 5 - Wed, Aug 12
Multiple Airlines Logo
10:05 am - 10:15 am
BOS
-
CWL
19h 10m
1 stop
Multiple Airlines Logo
11:15 pm - 7:15 pm
CWL
-
BOS
25h 00m
2 stops
$697Multiple Airlines
Sat, Sep 19 - Sat, Sep 26
Multiple Airlines Logo
8:50 pm - 9:20 pm
BOS
-
CWL
19h 30m
2 stops
Multiple Airlines Logo
7:30 am - 6:50 pm
CWL
-
BOS
16h 20m
2 stops
$711Multiple Airlines
Wed, Aug 5 - Wed, Aug 12
Multiple Airlines Logo
10:05 am - 10:15 am
BOS
-
CWL
19h 10m
1 stop
Multiple Airlines Logo
11:15 pm - 8:55 pm
CWL
-
BOS
26h 40m
3 stops
$713Multiple Airlines
Wed, Aug 5 - Wed, Aug 12
Multiple Airlines Logo
5:45 am - 10:15 am
BOS
-
CWL
23h 30m
2 stops
Multiple Airlines Logo
11:15 pm - 8:55 pm
CWL
-
BOS
26h 40m
3 stops
$750Multiple Airlines
Tue, Jun 23 - Tue, Jun 30
Multiple Airlines Logo
3:25 pm - 10:15 am
BOS
-
CWL
37h 50m
2 stops
Multiple Airlines Logo
11:35 am - 9:05 am
CWL
-
BOS
26h 30m
1 stop
$784Multiple Airlines
Sat, Sep 19 - Sat, Sep 26
Multiple Airlines Logo
9:15 pm - 9:20 pm
BOS
-
CWL
19h 05m
1 stop
Multiple Airlines Logo
7:30 am - 6:50 pm
CWL
-
BOS
16h 20m
1 stop
$844Multiple Airlines
Wed, Sep 9 - Mon, Sep 14
Multiple Airlines Logo
9:15 pm - 10:25 pm
BOS
-
CWL
20h 10m
1 stop
Multiple Airlines Logo
10:10 pm - 7:15 pm
CWL
-
BOS
26h 05m
2 stops
$874Multiple Airlines
Fri, Sep 18 - Sun, Sep 27
Multiple Airlines Logo
5:25 pm - 6:55 am
BOS
-
CWL
8h 30m
1 stop
Multiple Airlines Logo
9:35 am - 9:45 pm
CWL
-
BOS
17h 10m
2 stops
$887Multiple Airlines
Thu, Sep 17 - Sun, Sep 27
Multiple Airlines Logo
9:15 pm - 10:20 pm
BOS
-
CWL
20h 05m
1 stop
Multiple Airlines Logo
9:35 am - 9:45 pm
CWL
-
BOS
17h 10m
2 stops
$890Multiple Airlines
Wed, Sep 9 - Thu, Sep 17
Multiple Airlines Logo
9:15 pm - 10:25 pm
BOS
-
CWL
20h 10m
1 stop
Multiple Airlines Logo
9:00 am - 9:05 pm
CWL
-
BOS
17h 05m
2 stops
$896Multiple Airlines
Booking Insights

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.

How much is a round-trip flight from Boston to Cardiff?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Cardiff departing in August.

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 round-trip 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 February, where tickets cost $687 (return) on average. On the other hand, the most expensive months are May and July, where the average cost of round-trip tickets is $1,681 and $1,431 respectively.

Find deals

Good to know

Low seasonFebruary
Cheapest flight$287
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly and prices are also 19% 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 $287 for a one-way ticket and $697 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.

  • 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.

Reviews of the top airline 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.
7.9
DeltaOverall score based on 8434 reviews
7.8Entertainment
7.8Comfort
8.5Crew
7.2Food
8.1Boarding
Airline reviews

Planes were clean, no water or snacks on either flight.

6.0 GoodAnonymous, May 2026
ECP - ATL
Read more Delta reviews

Planes were clean, no water or snacks on either flight.

Free & relatively fast Wi-Fi. Would've liked a wider drink selection.

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

The Boarding process was great. Particularly since my wife and I require assistance. The flight attendants were amazing. We travel frequently; they honestly were a cut above. 😀

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

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

Information on your arrival and departure airports

Boston (BOS)
Cardiff (CWL)