CWL - IAD

$492 Find Cheap Flights from Cardiff to Washington, D.C. - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,040
Typical prices: $1,019-$1,237
Multiple Airlines
Mon 12/10Mon 12/17
CWL - IAD • 2 stops
When to travel
March
Cheapest • 20% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
London Heathrow (LHR)
Cheapest • Avg $832 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 10h 38m (one-way)
Insights
Insights
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We hope you love your trip to Washington, D.C. Dulles Intl Airport!
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Booking Insights
Flight Deals

Cheap Flights from Cardiff to Dulles Intl (CWL-IAD)

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

Recent round-trip flight deals from Cardiff to Dulles Intl

Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
1:25 pm - 7:55 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 30m2 stops Dublin London Heathrow
Multiple Airlines Logo
8:50 pm - 3:40 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
13h 50m1 stop Dublin
$1,040Multiple Airlines
Mon, Dec 14 - Mon, Dec 21
Multiple Airlines Logo
8:35 am - 3:45 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
12h 10m1 stop Dublin
Multiple Airlines Logo
5:15 pm - 9:40 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
23h 25m1 stop Dublin
$1,161Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
1:25 pm - 7:55 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 30m2 stops Dublin London Heathrow
Multiple Airlines Logo
8:50 pm - 12:30 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
34h 40m3 stops Dublin Glasgow Intl Belfast City
$1,249Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
1:25 pm - 7:55 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 30m2 stops Dublin London Heathrow
Multiple Airlines Logo
8:50 pm - 9:50 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
32h 00m2 stops Dublin Amsterdam Schiphol
$1,254Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
5:30 pm - 3:55 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
27h 25m1 stop Amsterdam Schiphol
Multiple Airlines Logo
6:15 pm - 5:00 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
17h 45m1 stop Amsterdam Schiphol
$1,300Multiple Airlines
Mon, Dec 14 - Mon, Dec 21
Multiple Airlines Logo
10:20 am - 11:23 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
18h 03m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
Multiple Airlines Logo
6:15 pm - 9:45 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
10h 30m1 stop Amsterdam Schiphol
$1,319Multiple Airlines
Mon, Dec 14 - Mon, Dec 21
Multiple Airlines Logo
5:30 pm - 6:30 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
30h 00m3 stops Amsterdam Schiphol Kastrup Copenhagen Reykjavik Keflavik Intl
Multiple Airlines Logo
8:50 pm - 9:40 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
19h 50m1 stop Dublin
$1,420Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
5:30 pm - 7:05 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
30h 35m3 stops Amsterdam Schiphol Madrid Barajas Casablanca Mohamed V
Multiple Airlines Logo
12:50 pm - 3:40 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
21h 50m3 stops DuBois Jefferson County Pittsburgh Dublin
$1,521Multiple Airlines
Mon, Dec 14 - Mon, Dec 21
Multiple Airlines Logo
10:20 am - 3:40 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
34h 20m3 stops Amsterdam Schiphol Dublin London Heathrow
Multiple Airlines Logo
8:50 pm - 9:50 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
32h 00m2 stops Dublin Amsterdam Schiphol
$1,615Multiple Airlines
Mon, Dec 14 - Mon, Dec 21
Multiple Airlines Logo
10:20 am - 3:40 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
34h 20m3 stops Amsterdam Schiphol Dublin London Heathrow
Multiple Airlines Logo
8:50 pm - 11:45 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
33h 55m3 stops Dublin Glasgow Intl Belfast City
$1,656Multiple Airlines
Booking Insights

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

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What’s the most popular layover airport when flying from Cardiff to Washington, D.C. Dulles Intl Airport?

Amsterdam Schiphol (AMS) is the most popular layover for the Cardiff to Washington, D.C. Dulles Intl Airport route. 86% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via AMS.

What is the cheapest layover airport when flying from Cardiff to Washington, D.C. Dulles Intl Airport?

Flights via London Heathrow (LHR) offer the most affordable fares, with an average round-trip price of $832. Based on KAYAK data over the past 3 months.

When flying from Cardiff to Washington, D.C. Dulles Intl Airport which airport offers the shortest layover?

Amsterdam Schiphol (AMS) had the shortest average connection time for Cardiff to Washington, D.C. Dulles Intl Airport layovers at 6h 18m over the past 3 months.

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

Low season

February

Cheapest flight

$1,040
Beat the crowds with an average 82% drop in travelers.
The most popular month to fly with an average 8% increase in travelers.
Round-trip flight from Cardiff to Washington, D.C. Dulles Intl Airport

When to book flights from Cardiff to Dulles Intl

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

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

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

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

    There are currently no nonstop flights available from Cardiff to Washington, D.C. Dulles Intl Airport. Flights with 1 layover take between 10h 38m and 15h 49m in total, depending on the connection.

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

    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 Cardiff to Washington, D.C. Dulles Intl Airport flight?

    Round-trip flights from Cardiff to Washington, D.C. Dulles Intl Airport range from $1,019 to $1,237, with an average of $1,144 over the past 12 months. Anything below $1,019 counts as a good deal.

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

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about $1,040 to $1,656. That means the highest observed fare was about 59% higher than the lowest one.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates averaging $70 for economy cars. Top options include:

    • Dollar
    • Hertz
    • Budget
    • Sixt
    • Thrifty

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

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

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

    One-stop flights from Cardiff to Washington, D.C. Dulles Intl Airport most commonly connect through:

    • Amsterdam Schiphol (AMS) - 86% of one-stop connections
    • Dublin (DUB) - 7% of one-stop connections
    • London Heathrow (LHR) - 7% of one-stop connections

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

    Yes. Flexible dates can save you up to 48% on flights from Cardiff to Washington, D.C. Dulles Intl Airport. Monday is the cheapest departure day at $881 round-trip on average, while Friday is the most expensive at $1,693, a difference of $812.

    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 Cardiff to Washington, D.C. Dulles Intl Airport?

    Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 10h 38m, compared with 13h 44m via London Heathrow (LHR) and 15h 49m via Dublin (DUB).

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

    Washington, D.C. Dulles Intl Airport is 4 hours behind Cardiff (Eastern Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

Your guide to booking Cardiff to Washington, D.C. Dulles Intl Airport 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 Monday departure and avoid flying on Friday. On this route, Monday flights average $881, about $812 less than Friday fares (48% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Cardiff to Washington, D.C. Dulles Intl Airport trip for March. Fares historically average $915 round-trip in that month - typically $840 less than the most expensive month, which is December (based on the last 12 months).

More options for your flight from Cardiff to Dulles Intl

Complete your trip to Washington, D.C. with a hotel stay or car rental

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