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Cheap flights from Cardiff to Boston from £490

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to Boston departing on 23/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Cardiff to Boston

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
16:05 - 20:55
CWL
-
BOS
33h 50m2 stops
Multiple Airlines Logo
21:15 - 19:40
BOS
-
CWL
17h 25m1 stop
£490Multiple Airlines
Fri, 23 Jan - Fri, 30 Jan
Multiple Airlines Logo
09:45 - 18:30
CWL
-
BOS
13h 45m1 stop
Multiple Airlines Logo
18:40 - 16:45
BOS
-
CWL
17h 05m1 stop
£553Multiple Airlines
Mon, 4 May - Wed, 13 May
KLM Logo
09:45 - 18:29
CWL
-
BOS
13h 44m2 stops
KLM Logo
18:40 - 16:45
BOS
-
CWL
17h 05m1 stop
£557KLM
Mon, 4 May - Wed, 13 May
Delta Logo
09:50 - 13:35
CWL
-
BOS
32h 45m1 stop
Delta Logo
16:45 - 09:15
BOS
-
CWL
11h 30m1 stop
£583Delta
Sun, 3 May - Mon, 11 May
Multiple Airlines Logo
22:25 - 14:35
CWL
-
BOS
21h 10m2 stops
Multiple Airlines Logo
20:50 - 19:40
BOS
-
CWL
17h 50m2 stops
£586Multiple Airlines
Fri, 23 Jan - Fri, 30 Jan
Delta Logo
09:45 - 07:22
CWL
-
BOS
26h 37m2 stops
Delta Logo
16:45 - 16:45
BOS
-
CWL
19h 00m1 stop
£587Delta
Tue, 5 May - Mon, 11 May
Multiple Airlines Logo
09:45 - 19:45
CWL
-
BOS
15h 00m2 stops
Multiple Airlines Logo
16:45 - 17:05
BOS
-
CWL
19h 20m1 stop
£592Multiple Airlines
Mon, 4 May - Fri, 15 May
Multiple Airlines Logo
09:45 - 18:29
CWL
-
BOS
13h 44m2 stops
Multiple Airlines Logo
21:25 - 16:45
BOS
-
CWL
14h 20m2 stops
£595Multiple Airlines
Tue, 5 May - Wed, 13 May
Delta Logo
09:45 - 19:45
CWL
-
BOS
15h 00m2 stops
Delta Logo
18:40 - 16:45
BOS
-
CWL
17h 05m1 stop
£595Delta
Mon, 4 May - Tue, 12 May
Delta Logo
09:50 - 13:35
CWL
-
BOS
32h 45m1 stop
Delta Logo
11:00 - 09:15
BOS
-
CWL
17h 15m2 stops
£596Delta
Sun, 3 May - Tue, 12 May

Delta flights from Cardiff to Boston

Our best Delta deals on Cardiff to Boston flight tickets
Delta
3 May
CWL09:50Cardiff Wales
32h 45m
1 stop
BOS13:35Boston Logan Intl
11 May
BOS16:45Boston Logan Intl
11h 30m
1 stop
CWL09:15Cardiff Wales
£583
Find similar
Delta
5 May
CWL09:45Cardiff Wales
26h 37m
2 stops
BOS07:22Boston Logan Intl
11 May
BOS16:45Boston Logan Intl
19h 00m
1 stop
CWL16:45Cardiff Wales
£587
Find similar
Delta
4 May
CWL09:45Cardiff Wales
15h 00m
2 stops
BOS19:45Boston Logan Intl
12 May
BOS18:40Boston Logan Intl
17h 05m
1 stop
CWL16:45Cardiff Wales
£595
Find similar

KLM flights from Cardiff to Boston

Our best KLM deals on Cardiff to Boston flight tickets
KLM
4 May
CWL09:45Cardiff Wales
13h 44m
2 stops
BOS18:29Boston Logan Intl
13 May
BOS18:40Boston Logan Intl
17h 05m
1 stop
CWL16:45Cardiff Wales
£557
Find similar
KLM
4 May
CWL09:45Cardiff Wales
13h 44m
2 stops
BOS18:29Boston Logan Intl
13 May
BOS22:20Boston Logan Intl
13h 25m
2 stops
CWL16:45Cardiff Wales
£700
Find similar
KLM
4 May
CWL09:45Cardiff Wales
13h 44m
2 stops
BOS18:29Boston Logan Intl
14 May
BOS22:20Boston Logan Intl
13h 25m
2 stops
CWL16:45Cardiff Wales
£796
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Cardiff to Boston 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, momondo users made 279,928 searches. Data last updated 10 December 2025.
Use the filters below to find and compare flights from Cardiff to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 23/1

16:05-20:55

2 stops33h 50m

Boston Logan Intl

Fri 30/1

21:15-19:40

1 stop17h 25m

£490

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 4/5

09:45-18:30

1 stop13h 45m

Boston Logan Intl

Wed 13/5

18:40-16:45

1 stop17h 05m

£553

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 4/5

09:45-18:29

2 stops13h 44m

Boston Logan Intl

Wed 13/5

18:40-16:45

1 stop17h 05m

£557

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 3/5

09:50-13:35

1 stop32h 45m

Boston Logan Intl

Mon 11/5

16:45-09:15

1 stop11h 30m

£583

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Fri 23/1

22:25-14:35

2 stops21h 10m

Boston Logan Intl

Fri 30/1

20:50-19:40

2 stops17h 50m

£586

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 5/5

09:45-07:22

2 stops26h 37m

Boston Logan Intl

Mon 11/5

16:45-16:45

1 stop19h 00m

£587

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 4/5

09:45-19:45

2 stops15h 00m

Boston Logan Intl

Fri 15/5

16:45-17:05

1 stop19h 20m

£592

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Tue 5/5

09:45-18:29

2 stops13h 44m

Boston Logan Intl

Wed 13/5

21:25-16:45

2 stops14h 20m

£595

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Mon 4/5

09:45-19:45

2 stops15h 00m

Boston Logan Intl

Tue 12/5

18:40-16:45

1 stop17h 05m

£595

CardiffBoston

CWL - BOS

CWLBOS

Cardiff Wales

Sun 3/5

09:50-13:35

1 stop32h 45m

Boston Logan Intl

Tue 12/5

11:00-09:15

2 stops17h 15m

£596

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Boston from

How to get the cheapest flight ticket from Cardiff to Boston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart on your flight to Boston is on a Tuesday when prices can be found for as low as £472. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around £786. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boston.

What is the cheapest time of day to depart on your flight to Boston?

Our most recent data shows that the best time of day to fly to Boston is in the morning. Flights from Cardiff to Boston during this time can be as low as £516. In the afternoon is when there is more demand to fly to Boston, so prices are often more expensive at around £684 per ticket.

When to book flights from Cardiff to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from Cardiff to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Cardiff to Boston (CWL to BOS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cardiff to Boston

Fastest flight time

13h 35m

Direct flights

None
The fastest flight from Cardiff to Boston takes 13h 35m
There are no direct flights from Cardiff to Boston. There are no popular flight routes from Cardiff to Boston.
Search flight deals

  • How far is Cardiff Wales to Boston Logan Intl by plane?

    The straight-line distance from Cardiff Wales to Boston Logan Intl is 3144.0 mi. A reasonable flight in good conditions will take 10h 15m.

  • When did momondo last update prices for flights from Cardiff Wales Airport to Boston Logan Intl Airport?

    Prices for flights from Cardiff Wales Airport to Boston Logan Intl Airport were last updated today.

  • How many operators does momondo search for flights from Cardiff Wales Airport to Boston Logan Intl Airport?

  • How old do you have to be to fly from Cardiff Wales Airport to Boston Logan Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Cardiff Wales Airport to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The required travel and health documents for your Boston Logan Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Boston Logan Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Cardiff to Boston?

Best airlines flying from Cardiff to Boston

Compare and see reviews for airlines that fly from Cardiff to Boston with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom £447Free CancellationRating
7.7
1,431 reviews
Search KLM flights
Virgin AtlanticPriceFrom £449Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Salem
Waltham
Cambridge
Amherst
Falmouth
Burlington
Plymouth
Randolph
Braintree
Revere
York Beach
Needham
Somerville
Cape Neddick
Concord
Old Orchard Beach
Sandwich
Everett
Hampton
Hull

Why use momondo?

Why should I use momondo to find a flight deal from Cardiff to Boston?

Finding the right flight to Boston from Cardiff is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Boston quick and easy, saving you time and money.

Can I find flights from Cardiff to Boston with flexible booking policies on momondo?

momondo does allow users to show only those flights to Boston from Cardiff which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Cardiff to Boston?

momondo helps you find the best flight between Cardiff and Boston by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Cardiff to Boston right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Boston from Cardiff. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Boston trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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