IAD - CWL

$949 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
$949
Typical prices: $985-$1,465
Multiple Airlines
Thu 12/6Thu 12/13
IAD - CWL • 1 stop
When to travel
November
Cheapest • 23% price drop
October
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg $931 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 11h 34m (one-way)
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Flight Deals

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

Sun, Dec 6 - Sun, Dec 13
Multiple Airlines Logo
5:15 pm - 8:10 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
9:05 am - 4:20 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
36h 15m2 stops Alicante Madrid Barajas
$949Multiple Airlines
Fri, Apr 9 - Tue, Apr 13
Multiple Airlines Logo
8:30 pm - 3:15 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
13h 45m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
5:30 pm - 7:00 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
30h 30m3 stops Dublin Madrid Barajas Casablanca Mohamed V
$1,019Multiple Airlines
Fri, Apr 9 - Tue, Apr 13
Multiple Airlines Logo
8:45 pm - 3:15 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
13h 30m1 stop Dublin
Multiple Airlines Logo
5:30 pm - 7:00 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
30h 30m3 stops Dublin Madrid Barajas Casablanca Mohamed V
$1,036Multiple Airlines
Fri, Apr 9 - Tue, Apr 13
Multiple Airlines Logo
9:55 am - 3:15 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
24h 20m3 stops Montreal Pierre Elliott Trudeau Intl Frankfurt am Main Dublin
Multiple Airlines Logo
5:30 pm - 7:00 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
30h 30m3 stops Dublin Madrid Barajas Casablanca Mohamed V
$1,054Multiple Airlines
Fri, Apr 9 - Tue, Apr 13
Multiple Airlines Logo
5:15 pm - 3:15 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
17h 00m1 stop Dublin
Multiple Airlines Logo
3:50 pm - 8:35 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
33h 45m2 stops Faro Lisbon Humberto Delgado
$1,112Multiple Airlines
Mon, Nov 23 - Mon, Dec 7
Multiple Airlines Logo
7:40 pm - 5:00 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
16h 20m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Amsterdam Schiphol
Multiple Airlines Logo
8:35 am - 3:45 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
12h 10m1 stop Dublin
$1,170Multiple Airlines
Mon, Mar 8 - Sat, Mar 13
Virgin Atlantic Logo
6:15 pm - 9:50 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
10h 35m1 stop Amsterdam Schiphol
Virgin Atlantic Logo
5:30 pm - 3:40 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
27h 10m1 stop Amsterdam Schiphol
$1,173Virgin Atlantic
Mon, Mar 8 - Sat, Mar 13
Virgin Atlantic Logo
7:30 am - 9:50 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
21h 20m2 stops Minneapolis St Paul Amsterdam Schiphol
Virgin Atlantic Logo
5:30 pm - 3:40 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
27h 10m1 stop Amsterdam Schiphol
$1,177Virgin Atlantic
Mon, Nov 23 - Mon, Dec 7
Multiple Airlines Logo
7:40 pm - 5:00 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
16h 20m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Amsterdam Schiphol
Multiple Airlines Logo
5:30 pm - 2:40 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
26h 10m3 stops Amsterdam Schiphol Geneva Geneve-Cointrin Lisbon Humberto Delgado
$1,178Multiple Airlines
Mon, Mar 8 - Sat, Mar 13
Delta Logo
1:00 pm - 9:50 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
15h 50m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
Delta Logo
10:20 am - 11:02 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
17h 42m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
$1,187Delta
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 with more confidence.

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

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Cardiff. It’s 24% cheaper than the average day, while Monday is the most expensive, with prices 19% higher.

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

Cheapest flight

$949
The most popular month to fly with an average 22% increase in travelers.
Round-trip 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 answers about this route, including flight times, airports, airlines and booking tips.

  • What 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.

  • 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 11h 34m 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.

  • 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 $985 to $1,465, with an average of $1,229 over the past 12 months. Anything below $985 counts as a good deal.

  • 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, round-trip prices on this route varied from about $949 to $1,649. That means the highest observed fare was about 73% higher than the lowest one.

  • 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
    • Avis
    • Enterprise Rent-A-Car
    • National

  • 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 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

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

    Yes. Flexible dates can save you up to 36% on flights from Washington, D.C. Dulles Intl Airport to Cardiff. Tuesday is the cheapest departure day at $942 round-trip on average, while Monday is the most expensive at $1,467, a difference of $525.

    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 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 11h 34m, compared with 13h 22m via Toronto Pearson Intl (YYZ).

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

    Cardiff is 4 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.

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 and avoid flying on Monday. On this route, Tuesday flights average $942, about $525 less than Monday fares (36% 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 $942 round-trip in that month - typically $882 less than the most expensive month, which is June (based on the last 12 months).

More options for your flight from Dulles Intl to Cardiff

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