IAD - CWL

$368 Find Cheap Flights from Washington Dulles Airport to Cardiff - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$881
Typical prices: $929-$1,295
Multiple Airlines
Sat 10/6Sat 10/13
IAD - CWL • 2 stops
Cheapest one-way
$368
Typical prices: $534-$585
Multiple Airlines
Fri 1/5
IAD - CWL • 3 stops
When to travel
November
Cheapest • 18% price drop
October
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Dublin (DUB)
Cheapest • Avg $670 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 10h 39m (one-way)
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Cheap Flights from Dulles Intl to Cardiff (IAD-CWL)

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

Recent round-trip flight deals from Dulles Intl to Cardiff

Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
4:00 pm - 11:25 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
26h 25m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
9:45 pm - 7:00 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
26h 15m2 stops Alicante Casablanca Mohamed V
$881Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
Multiple Airlines Logo
10:20 pm - 10:20 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
19h 00m2 stops Munich Franz Josef Strauss Dublin
Multiple Airlines Logo
10:50 pm - 3:25 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
21h 35m2 stops Dublin Toronto Pearson Intl
$882Multiple Airlines
Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
5:15 pm - 11:25 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
25h 10m1 stop Dublin
Multiple Airlines Logo
9:45 pm - 3:30 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
22h 45m2 stops Alicante Madrid Barajas
$905Multiple Airlines
Mon, Sep 14 - Wed, Sep 23
Multiple Airlines Logo
5:15 pm - 10:50 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
24h 35m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 10:45 amCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
39h 55m2 stops Dublin Toronto Pearson Intl
$997Multiple Airlines
Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
4:00 pm - 11:25 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
26h 25m3 stops Toronto Pearson Intl Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
9:45 pm - 7:00 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
26h 15m2 stops Alicante Casablanca Mohamed V
$1,004Multiple Airlines
Wed, Oct 7 - Wed, Oct 14
Multiple Airlines Logo
5:15 pm - 10:25 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
24h 10m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 7:00 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
24h 10m2 stops Dublin Madrid Barajas
$1,020Multiple Airlines
Wed, Oct 7 - Wed, Oct 14
Multiple Airlines Logo
5:15 pm - 10:25 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
24h 10m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 7:00 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
24h 10m2 stops Dublin Madrid Barajas
$1,021Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
Multiple Airlines Logo
5:15 pm - 6:55 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
32h 40m1 stop Dublin
Multiple Airlines Logo
4:55 pm - 3:40 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
27h 45m2 stops Alicante Madrid Barajas
$1,036Multiple Airlines
Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
4:00 pm - 4:45 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
19h 45m3 stops Toronto Pearson Intl Dublin Amsterdam Schiphol
Multiple Airlines Logo
9:45 am - 3:25 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
34h 40m3 stops Amsterdam Schiphol Dublin Toronto Pearson Intl
$1,057Multiple Airlines
Mon, Sep 14 - Wed, Sep 23
Multiple Airlines Logo
4:00 pm - 10:50 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
25h 50m3 stops Toronto Pearson Intl Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
11:50 pm - 3:10 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
20h 20m2 stops Dublin Lisbon Humberto Delgado
$1,072Multiple Airlines
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, it 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

$368
Most popular time to fly with an average 40% increase in price.
Flight from Washington, D.C. Dulles Intl Airport to Cardiff

When to book flights from Dulles Intl to Cardiff

Are your dates flexible? Find out the best times to travel from Dulles Intl to Cardiff based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip 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).

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

    Two cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to Cardiff:

    • Economy Class
    • Business Class

  • 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) - 89% of one-stop connections
    • Dublin (DUB) - 11% 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 $901 round-trip on average, while Monday is the most expensive at $1,824, a difference of $923. 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 nonstop flights available from Washington, D.C. Dulles Intl Airport to Cardiff. Flights with 1 layover take between 10h 39m and 10h 59m 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.

  • 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 $415, which is 23% below the typical average for this route.

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

    Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 10h 39m, compared with 10h 59m via Dublin (DUB).

  • 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.

  • What car rental options are available at Cardiff Wales Airport (CWL)?

    Cardiff Wales Airport (CWL) hosts 5 major car rental companies, with daily rates starting from around $15 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?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to Cardiff range from $929 to $1,295, with an average of $1,126 over the past 12 months. Anything below $929 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 can be flexible, aim for a Tuesday departure instead of Monday. On this route, Tuesday flights average $901 - about $923 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 $929 round-trip in that month - typically $895 less than the most expensive month, which is June (based on the last 12 months).

Everything you need to know for your flight from Dulles Intl to Cardiff

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Cardiff (CWL)