Cheap flights from Cardiff to Boston

from as little as £504

10 nights in Boston, departing Cardiff on 29 / Jan / 2026 with KLM (price found 45 hours ago)

Subject to availability, prices correct of the last 24 hours
Boston

The Cardiff / Boston route

All 5055 km of it

Cheap flight deals for this route

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No deals available at this time.

Boston flight facts

What you need to know

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Boston

Today alone, Netflights has searched over 200 flights. 29 / Jan / 2026 is currently the lowest priced day of the year to fly the Cardiff/Boston route. There are around 65 flights on any given week from the UK to Boston and the cheapest month to fly right now is January.

Not suitable? Try running another search or viewing all cheap flight deals.

Min / Max Temperature (°C)
LOWEST

-5 °C

AVG

11 °C

HIGHEST

28 °C

Rainfall (mm)
LOWEST

78 mm

AVG

89.3 mm

HIGHEST

101 mm

Key facts about Boston

How to get cheap flights from Cardiff to Boston

Tips and advice from our flight experts

You’ve searched for flights from Cardiff to Boston. We've gone through all 65 flights that go to or via Boston every week, to help you find the cheapest flight. Virgin Atlantic usually has the best-value flights from Cardiff, but make sure you compare all your options to get the cheapest flight possible.

When you fly 5055 km from Cardiff to Boston, you can choose from three airlines. Flights are most expensive during high season, and you can expect accommodation prices to be higher then too. Last-minute deals do crop up, but it's best to book in advance to avoid disappointment.

If you're fairly flexible about when you want to fly to Boston, searching by month will show you the cheapest times to go. It’s also worth looking out for flights operated by Virgin Atlantic, KLM & Air France, as they're the most popular airlines for this journey.

It takes about 11 hrs 40 mins to fly from Cardiff to Boston. Once you’ve chosen your flight, go through and fill out your details to complete your booking. If you haven’t yet sorted your hotel or car hire, take a look at our competitive rates – then you can book your flights and accommodation in one go.

Other popular destinations near Boston

Where other people are flying to

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