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Cheap flight tickets from Washington D.C. to Cardiff

Compare Washington D.C. to Cardiff flight deals

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

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Flight deals from Washington D.C. to Cardiff

Looking for a cheap last-minute deal or the best return flight from Washington D.C. to Cardiff? Find the lowest prices on one-way and return tickets right here.
Cardiff.RM3,066 per passenger.Departing Tue, 10 Mar, returning Wed, 18 Mar.Return flight with KLM.Outbound indirect flight with KLM, departs from Washington Dulles on Tue, 10 Mar, arriving in Cardiff.Inbound indirect flight with KLM, departs from Cardiff on Wed, 18 Mar, arriving in Washington Dulles.Price includes taxes and charges.From RM3,066, select.
Cardiff.RM3,123 per passenger.Departing Wed, 8 Apr, returning Wed, 15 Apr.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Washington Dulles on Wed, 8 Apr, arriving in Cardiff.Inbound indirect flight with Air France, departs from Cardiff on Wed, 15 Apr, arriving in Washington Dulles.Price includes taxes and charges.From RM3,123, select.
Cardiff.RM3,123 per passenger.Departing Mon, 11 May, returning Mon, 18 May.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Washington Dulles on Mon, 11 May, arriving in Cardiff.Inbound indirect flight with Air France, departs from Cardiff on Mon, 18 May, arriving in Washington Dulles.Price includes taxes and charges.From RM3,123, select.
Cardiff.RM3,373 per passenger.Departing Thu, 17 Sep, returning Sun, 20 Sep.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Washington Dulles on Thu, 17 Sep, arriving in Cardiff.Inbound indirect flight with Virgin Atlantic, departs from Cardiff on Sun, 20 Sep, arriving in Washington Dulles.Price includes taxes and charges.From RM3,373, select.

Find the cheapest month to fly from Washington D.C. to Cardiff

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington D.C. to Cardiff flights are currently cheapest in March.
Feb
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Mar
from RM3,066
Apr
from RM3,123
May
from RM3,123
Jun
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Jul
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Aug
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Sep
from RM3,373
Oct
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Nov
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Dec
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Jan
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Washington D.C. to Cardiff: Alternative routes

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

Cardiff

15km from central Cardiff
Closest
from RM3,066
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Bristol

34km from central Cardiff
Cheapest
from RM2,079
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Swansea

56km from central Cardiff
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Exeter

85km from central Cardiff
from RM3,328
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Washington D.C. to Cardiff: Flight information

The things to know before you go.
Cheapest flight foundRM3,066
Cheapest month to flyMarch

Finding cheap flights from Washington D.C. to Cardiff: Frequently asked questions

The best price we found for a return flight from Washington D.C. to Cardiff is RM3,066. 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.
Currently, there are no airlines that fly direct from Washington D.C. to Cardiff. But we found flights with one stop from RM3,066.
As of February 2026, there are no flights flying from Washington D.C. to Cardiff.
The cheapest month to fly from Washington D.C. to Cardiff is usually March.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to Cardiff Airport on Tuesday, 10 March 2026.
No airlines currently offer direct flights between Washington D.C. and Cardiff Airport. Most routes have one or more stops.
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.
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.
The cheapest airline that flies to Cardiff is KLM .

Travelling from Washington DC to Cardiff Airport (CWL): What you need to know

  • Organising your flight from Washington DC to Cardiff Airport (CWL) begins with finding the best airport to kick off your journey from. Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) and Baltimore/Wash International Thurgood Marshall Airport (BWI) are your main options in Washington DC.

  • Cardiff Airport is located in Cardiff. The city follows the UTC+0 timezone and is four hours ahead of Washington DC.

  • Leave plenty of time to get on your flight from Washington DC to CWL. Generally, it's best to arrive at least two hours before international departures and an hour ahead for domestic flights.

  • Longer lines at security and check-in are likely if you're jetting off during high season, so allow some extra breathing room. The recommendation for peak times? Get there up to four hours early for international flights and two hours for domestic departures.

Airports in Washington DC

Ronald Reagan National Airport (DCA)

  • Located around 8 kilometres from the centre of Washington DC, DCA can be reached in about 15 minutes by car (depending on traffic). The journey by public transport takes roughly 45 minutes.

  • Want a relaxed start to your journey? Stay near Ronald Reagan National Airport. Whether you're boarding an early flight from Washington DC to Cardiff Airport or prefer not to rush, these hotels are just the thing:

  • When it comes to Ronald Reagan National Airport's on-time performance, 76.44% of flights meet their scheduled arrival time.

  • The address for DCA is 1 Aviation Circle.

Washington Dulles International Airport (IAD)

  • Make the most of your holiday with a stopover on your flight from Washington DC to Cardiff Airport. Here's where you can connect between Washington Dulles International Airport and CWL:

    • Amsterdam Airport Schiphol (AMS)

    • Dublin Airport (DUB)

    • Edinburgh Airport (EDI)

  • You can arrive at IAD from the centre of Washington DC in approximately 50 minutes by car, depending on traffic conditions. The journey on public transport will take roughly 1 hour 10 minutes to cover the 56 kilometres or so.

  • Start your holiday sooner with an extra night away from home. Before your Washington DC to CWL flight, kick back in one of these hotels near Washington Dulles International Airport:

  • When it comes to flights staying on schedule, Washington Dulles International Airport has an on-time arrival rate of 74.39%.

  • The address for IAD is 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Whether just for an hour or several days, a stopover can make your journey feel a little more manageable. When jetting out of Baltimore/Wash International Thurgood Marshall Airport (BWI), you can book a plane ticket from Washington DC to Cardiff Airport (CWL) stopping at Keflavik International Airport (KEF).

  • From the centre of Washington DC, BWI is around 48 kilometres away. It'll take you roughly 50 minutes to reach the airport by car and 1 hour 30 minutes or so on public transport.

  • Make catching an early Washington DC to Cardiff Airport flight the easiest part of your journey. Book a room at one of these accommodation options close to Baltimore/Wash International Thurgood Marshall Airport and get to your gate with time to spare:

  • Airports have an on-time performance rating that monitors how often flights touch down without delays. At BWI, that figure is 77.13%.

About Cardiff Airport (CWL)

  • The last thing you want is a lengthy journey to your hotel if you're getting in late on a flight from Washington DC to Cardiff Airport. Book one of these accommodation options near CWL instead:

  • Travel at your own speed with a Cardiff Airport rental car. Pick up your wheels from Europcar, Keddy By Europcar or Enterprise and find adventure across Cardiff and beyond.

  • Booking your vehicle around four weeks ahead of your Washington DC to Cardiff Airport flight can help you score a better rate.

Getting from Cardiff Airport (CWL) to central Cardiff

  • Cardiff Airport is about 14 kilometres from central Cardiff. How long it'll take to get there in a cab or car hire will depend on the time of day. Do a little research beforehand.

  • When travelling by public transport, expect a journey time of around 1 hour 5 minutes.

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

  • RM1,362 is the best price for a one-way ticket from Washington DC to Cardiff Airport. A return flight starts from RM3,066. These prices may change depending on demand.

  • Booking early is often the key to finding a cheap flight from Washington DC to CWL. Airlines adjust prices based on demand, so the closer you get to departure, the more you'll likely spend on your ticket.

  • If you have some flexibility with your travel dates, use the 'Whole month' tool. It'll show you the cheapest price across every month when searching for your Washington DC to Cardiff Airport ticket.

  • Stay on top of deals for plane tickets from Washington DC to CWL by creating a Price Alert. We'll send you an email or notification on the app when prices go down.

  • Filters make it easier to scoop up a deal on your flight from Washington DC to Cardiff Airport. Choose the airlines, flight times and stops that work for you. Then sort the results by 'Cheapest' to find the best price quickly.

The best time to fly from Washington DC to Cardiff Airport (CWL)

  • June is when most people book flights from Washington DC to Cardiff Airport (CWL). Plan your visit to Cardiff in April if you'd rather be there when it's quieter.

  • The warmest month in Cardiff is July, with temperatures ranging between 11ºC (52ºF) and 22ºC (72ºF). Lock in your Washington DC to CWL plane ticket then if that's your ideal forecast.

  • If you want to travel in cooler conditions, look for a cheap ticket from Washington DC to Cardiff Airport in January when temperatures are between 0ºC (32ºF) and 9ºC (48ºF).

More about Cardiff

  • Start your Cardiff trip right by choosing the ideal place to stay. Once you've booked your flight from Washington DC to Cardiff Airport, explore our range of hotels including:

  • There are so many things to explore in this city, it can be difficult to know where to begin. Cardiff Castle, St Fagans National History Museum and Cardiff Bay are major attractions which should be on any good Cardiff itinerary.

Explore more of the United Kingdom

  • London is just one of the many cities in the United Kingdom waiting to be discovered after you've seen Cardiff. Around 225 kilometres away to the east, check out popular attractions including The British Museum, Westminster Abbey and Big Ben.

  • Birmingham is another well-known destination in the United Kingdom and is around 153 kilometres north-east of Cardiff. No trip is complete without experiencing The Windsor Castle, Birmingham Museum & Art Gallery and Birmingham Hippodrome Theatre.

Plan the rest of your trip from Washington D.C. to Cardiff

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.