IAD - CWL

£228 Find Cheap Flights from Washington, D.C. to Cardiff – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£574
Typical prices: £686-£956
Multiple Airlines
Wed 24/10Wed 31/10
IAD - CWL • 1 stop
Cheapest one-way flight
£228
Typical prices: £394-£432
Multiple Airlines
Fri 12/10
IAD - CWL • 3 stops
When to travel
November
Cheapest • 18% price drop
October
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg £688 (return)
Amsterdam Schiphol (AMS)
Shortest trip • 11h 16m (one-way)
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Flight Deals

Cheap Flights from Washington, D.C. to Cardiff (IAD-CWL)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Washington, D.C. to Cardiff

Sun, 4 Oct - Mon, 19 Oct
Multiple Airlines Logo
15:50 - 21:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
24h 55m2 stops Toronto Island Dublin
Multiple Airlines Logo
22:10 - 19:35CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
26h 25m1 stop Dublin
£657Multiple Airlines
Thu, 22 Oct - Thu, 29 Oct
Multiple Airlines Logo
09:55 - 22:20IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
31h 25m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
13:25 - 20:20CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
10h 55m1 stop Dublin
£676Multiple Airlines
Sun, 4 Oct - Mon, 19 Oct
Multiple Airlines Logo
17:15 - 21:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
23h 30m1 stop Dublin
Multiple Airlines Logo
22:10 - 19:35CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
26h 25m1 stop Dublin
£750Multiple Airlines
Sun, 20 Sep - Sun, 4 Oct
Delta Logo
17:30 - 16:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
18h 15m1 stop Amsterdam Schiphol
Delta Logo
09:50 - 15:35CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
10h 45m1 stop Amsterdam Schiphol
£783Delta
Sun, 20 Sep - Sun, 4 Oct
Delta Logo
19:34 - 16:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
16h 11m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
Delta Logo
09:50 - 15:35CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
10h 45m1 stop Amsterdam Schiphol
£787Delta
Sun, 20 Sep - Thu, 24 Sep
Multiple Airlines Logo
17:15 - 21:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
23h 30m1 stop Dublin
Multiple Airlines Logo
22:50 - 14:25CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
20h 35m2 stops Dublin Lisbon Humberto Delgado
£790Multiple Airlines
Thu, 22 Oct - Thu, 29 Oct
Multiple Airlines Logo
09:55 - 22:20IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
31h 25m3 stops Toronto Pearson Intl Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
13:25 - 20:20CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
10h 55m1 stop Dublin
£791Multiple Airlines
Sun, 20 Sep - Sun, 4 Oct
Delta Logo
19:34 - 16:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
16h 11m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
Delta Logo
09:50 - 16:30CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 40m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
£793Delta
Sat, 19 Sep - Sun, 4 Oct
Delta Logo
18:26 - 16:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
41h 19m2 stops New York John F Kennedy Intl Amsterdam Schiphol
Delta Logo
09:50 - 15:35CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
10h 45m1 stop Amsterdam Schiphol
£795Delta
Sat, 19 Sep - Sun, 4 Oct
Delta Logo
18:26 - 16:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
41h 19m2 stops New York John F Kennedy Intl Amsterdam Schiphol
Delta Logo
09:50 - 16:30CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 40m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
£798Delta
Booking Insights

Price, demand, and travel trends for Washington, D.C. Dulles Intl Airport to Cardiff flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Washington, D.C. Dulles Intl Airport to Cardiff with more confidence.

What's the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Cardiff?

Tuesday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Cardiff and is 20% cheaper than the average day. Monday is the most expensive day with flight prices 61% higher than average. Based on deals found by KAYAK users in the last 12 months.

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Key details for Washington, D.C. Dulles Intl Airport to Cardiff flights

Low season

February

Cheapest flight

£228
Most popular time to fly (40% more expensive on average)
Flights from Washington, D.C. Dulles Intl Airport to Cardiff

When to book flights from Washington, D.C. to Cardiff

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Cardiff based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Washington, D.C. Dulles Intl Airport to Cardiff flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from Washington, D.C. Dulles Intl Airport to Cardiff?

    Flights from Washington, D.C. Dulles Intl Airport to Cardiff usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Cardiff Wales (CWL).

  • Which cabin classes can I book on flights from Washington, D.C. Dulles Intl Airport to Cardiff?

    Only Economy class is available on flights from Washington, D.C. Dulles Intl Airport to Cardiff.

  • Which airports do connecting flights from Washington, D.C. Dulles Intl Airport to Cardiff pass through?

    Connecting flights from Washington, D.C. Dulles Intl Airport to Cardiff most commonly pass through:

    • Amsterdam Schiphol (AMS) – 93% of one-stop connections
    • Toronto Pearson Intl (YYZ) – 7% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to Cardiff?

    Yes. Being flexible with your travel dates can save you up to 51% on the Washington, D.C. Dulles Intl Airport to Cardiff route. Tuesday is the cheapest departure day at £665 return on average, while Monday is the most expensive at £1,347, a difference of £682. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How long is a flight from Washington, D.C. Dulles Intl Airport to Cardiff?

    There are currently no direct flights available from Washington, D.C. Dulles Intl Airport to Cardiff. Flights with 1 stopover take between 11h 16m and 13h 22m in total, depending on the connection.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport to Cardiff?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Washington, D.C. Dulles Intl Airport to Cardiff changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £574 to £5,011. That means the highest observed fare was about 9x higher than the lowest one.

  • How are flight prices from Washington, D.C. Dulles Intl Airport to Cardiff looking right now?

    One-way fares from Washington, D.C. Dulles Intl Airport to Cardiff are currently lower than usual. Average one-way flight prices are about £297, which is 25% below the typical average for this route.

  • How much time can I save by choosing a different stopover airport from Washington, D.C. Dulles Intl Airport to Cardiff?

    Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time of 11h 16m, compared to 13h 22m via Toronto Pearson Intl (YYZ).

  • What is the time difference between Washington, D.C. Dulles Intl Airport and Cardiff?

    Cardiff is 5 hours ahead of Washington, D.C. Dulles Intl Airport (British Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which car hire options are available at Cardiff Wales Airport (CWL)?

    Cardiff Wales Airport (CWL) hosts 5 major car hire companies, with daily rates starting from around £11 for economy cars. Top options include:
    · Alamo
    · Budget
    · Enterprise Rent-A-Car
    · Avis
    · National

  • How much should I expect to pay for a Washington, D.C. Dulles Intl Airport to Cardiff flight?

    Return flights from Washington, D.C. Dulles Intl Airport to Cardiff range from £686 to £956, with an average of £832 over the past 12 months. Anything below £686 counts as a good deal.

Your guide to booking Washington, D.C. Dulles Intl Airport to Cardiff flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure instead of Monday. On this route, Tuesday flights average £665 – about £682 less than Monday (51% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Washington, D.C. Dulles Intl Airport to Cardiff trip for November. Fares historically average £686 return in that month – typically £661 less than the most expensive month, which is June (based on the last 12 months).

More options for your flight from Washington, D.C. to Cardiff

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