Cheap Flights from Washington Dulles to Cardiff

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Travellers and cabin class, 1 Adult, Economy

Compare Washington Dulles to Cardiff flight deals

Find the cheapest month or even day of the year to fly to Cardiff

Book the best Cardiff fare with no extra fees

Flight deals Cheapest month Find the best route Route info FAQs Tips and advice

Flight deals from Washington Dulles to Cardiff

Looking for a cheap last-minute deal or the best return flight from Washington Dulles Airport to Cardiff Airport? If you want to travel next month, return fares start from $2,232. Find the lowest prices on one-way and return tickets right here.

Cardiff.$2,004 per passenger.Departing Mon, 10 May, returning Tue, 18 May.Return flight with Air France.Outbound indirect flight with Air France, departs from Washington Dulles on Mon, 10 May, arriving in Cardiff.Inbound indirect flight with Air France, departs from Cardiff on Tue, 18 May, arriving in Washington Dulles.Price includes taxes and charges.From $2,004, select.

Cardiff.$2,085 per passenger.Departing Sat, 6 Mar, returning Fri, 12 Mar.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Washington Dulles on Sat, 6 Mar, arriving in Cardiff.Inbound indirect flight with Air France, departs from Cardiff on Fri, 12 Mar, arriving in Washington Dulles.Price includes taxes and charges.From $2,085, select.

Cardiff.$2,132 per passenger.Departing Mon, 23 Nov, returning Mon, 7 Dec.Return flight with KLM.Outbound indirect flight with KLM, departs from Washington Dulles on Mon, 23 Nov, arriving in Cardiff.Inbound indirect flight with KLM, departs from Cardiff on Mon, 7 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $2,132, select.

Cardiff.$2,147 per passenger.Departing Tue, 1 Dec, returning Thu, 10 Dec.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Washington Dulles on Tue, 1 Dec, arriving in Cardiff.Inbound indirect flight with Virgin Atlantic, departs from Cardiff on Thu, 10 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $2,147, select.

Cardiff.$2,232 per passenger.Departing Wed, 25 Nov, returning Mon, 30 Nov.Return flight with KLM.Outbound indirect flight with KLM, departs from Washington Dulles on Wed, 25 Nov, arriving in Cardiff.Inbound indirect flight with KLM, departs from Cardiff on Mon, 30 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $2,232, select.

Cardiff.$2,239 per passenger.Departing Tue, 5 Jan, returning Sat, 16 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Tue, 5 Jan, arriving in Cardiff.Inbound indirect flight with Delta, departs from Cardiff on Sat, 16 Jan, arriving in Washington Dulles.Price includes taxes and charges.From $2,239, select.

Cardiff.$3,492 per passenger.Departing Sat, 26 Dec, returning Fri, 1 Jan.Return flight with KLM.Outbound indirect flight with KLM, departs from Washington Dulles on Sat, 26 Dec, arriving in Cardiff.Inbound indirect flight with KLM, departs from Cardiff on Fri, 1 Jan, arriving in Washington Dulles.Price includes taxes and charges.From $3,492, select.

Find the cheapest month to fly from Washington Dulles to Cardiff

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Cardiff flights are currently cheapest in May.

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Washington Dulles to Cardiff: Alternative routes

Compare routes from Washington Dulles to Cardiff below. You may find an airport to fly into that's cheaper, faster, or easier than Cardiff.

Washington D.C. to Cardiff: Flight information

The things to know before you go.

Cheapest flight found	$2,004
Cheapest month to fly	May

Finding cheap flights from Washington Dulles to Cardiff: Frequently asked questions

How much are return flights from Washington Dulles to Cardiff?

The best price we found for a return flight from Washington Dulles to Cardiff is $2,004. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Washington Dulles to Cardiff?

Currently, there are no airlines that fly direct from Washington Dulles to Cardiff. But we found flights with one or more stops from $2,004.

How many flights are there a week from Washington Dulles to Cardiff?

As of October 2026, there are no flights flying from Washington Dulles to Cardiff.

When is the cheapest time to fly from Washington Dulles to Cardiff?

The cheapest month to fly from Washington Dulles to Cardiff is usually May.

Which upcoming date is cheapest to fly from Washington Dulles Airport to Cardiff Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Cardiff Airport on Monday, 10 May 2027.

Can I get a direct flight from Washington Dulles Airport to Cardiff Airport?

No airlines currently offer direct flights between Washington Dulles Airport and Cardiff Airport. Most routes have one or more stops.

How can I find the best flight deal to Cardiff?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Cardiff but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Cardiff?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Cardiff is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Washington Dulles Airport to Cardiff with?

Currently, Air France offers the cheapest flight tickets to Cardiff.

Travelling from Washington Dulles Airport (IAD) to Cardiff Airport (CWL): what you need to know

The timezone in Cardiff is UTC+0, which is five hours ahead of Washington DC.
For a smooth journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you can comfortably board your IAD to CWL flight.
Be prepared for longer queues during popular months such as July. Arriving up to four hours in advance for international flights and two hours for a domestic departure will help ensure a smooth travel experience.
If you'd like to include a stop along the way, simply deselect 'Direct flights only' when searching for your ticket from Washington Dulles Airport to Cardiff Airport. Here are the most popular stopovers between IAD and CWL:
- Amsterdam Schiphol Airport
- Dublin Airport
- Edinburgh Airport

How to find the cheapest flights from Washington Dulles Airport (IAD) to Cardiff Airport (CWL)

The lowest price we've found for a one-way Washington Dulles Airport to Cardiff Airport flight is $912. A round-trip ticket is currently $2,004. Depending on the availability when you book, these fares could change.
To get your hands on cheap tickets from IAD to CWL, book ahead. Airlines tend to offer their best fares when flights are first released.
If you're willing to be flexible with your trip dates, try using the 'Whole month' search function. It'll find the cheapest price across the month when looking for your flight from Washington Dulles Airport to Cardiff Airport.
Snapping up cheap flights from IAD to CWL couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as a new discounted fare appears.
Choose your ideal departure and arrival times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Washington Dulles Airport to Cardiff Airport.

Handy information about Washington Dulles Airport (IAD)

The address for IAD is 1 Saarinen Circle.
77% of flights leaving from Washington Dulles Airport land at their destination on time.
Central Washington DC to Washington Dulles Airport is around 40 kilometres. Depending on traffic, it'll take you about 45 minutes to get there if you're driving, catching a taxi or ride-sharing.
Catching public transport? Expect a journey time of around 1 hour 10 minutes.
Catching an early flight from Washington Dulles Airport to Cardiff Airport? Avoid the last-minute rush to the terminal (and get some extra shut-eye) by choosing one of these stays near IAD:

Arriving at Cardiff Airport (CWL)

Consider staying in a hotel near CWL if you're on a late Washington Dulles Airport to Cardiff Airport flight. Settle into one of these accommodation options and skip the long transfer:
Grab a Cardiff Airport rental car and explore Cardiff and beyond with your own set of wheels. Europcar, Keddy By Europcar and Enterprise are top outlets you can book with here.
Lock in the lowest price by booking your ride from Cardiff Airport around four weeks before your trip.

When to fly to Cardiff Airport (CWL)

The quietest month for a flight from Washington Dulles Airport to Cardiff Airport is November, while June is the busiest. Choose the ideal time to visit Cardiff based on whether you prefer a more relaxed vibe or a faster pace.
The warmest month in Cardiff is July, with temperatures ranging between 11ºC and 22ºC. Lock in your flights from Washington Dulles Airport to Cardiff Airport in this month if this is the type of weather you like.
January sees average temperatures of between 0ºC and 9ºC. Look for cheap tickets from IAD to CWL sometime then if you like travelling in cooler conditions.

Explore more of the United Kingdom

You've visited Cardiff, now it's time to explore more of the United Kingdom. Travel around 209 kilometres east to London to check off its popular sights. From The British Museum to Westminster Abbey and Big Ben, there's plenty to keep you busy.
If you're eager to discover another side of the United Kingdom, consider Manchester, about 225 kilometres north of Cardiff. Manchester United Museum & Stadium Tour, The Homes of Football and Museum of Science and Industry are the start of reasons to visit.