WAS - CWL

$424 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 round-trip
$1,057
Typical prices: $1,005-$1,465
Multiple Airlines
Thu 11/29Fri 12/14
IAD - CWL • 1 stop
Cheapest one-way
$424
Typical prices: $534-$585
Multiple Airlines
Mon 4/9
IAD - CWL • 2 stops
Top routes
DCA - CWL
Cheapest • 10% average savings
IAD - CWL
Most popular
Insights
Insights
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 $968 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 11h 34m (one-way)
Insights
Insights
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Flight Deals

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

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

Recent round-trip flight deals from Washington, D.C. to Cardiff

Sun, Nov 29 - Mon, Dec 14
Multiple Airlines Logo
5:15 pm - 8:10 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
8:35 am - 2:40 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 05m2 stops Dublin Lisbon Humberto Delgado
$1,057Multiple Airlines
Sun, Dec 13 - Sun, Dec 20
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 - 7:20 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
39h 15m2 stops Alicante Dublin
$1,061Multiple Airlines
Sun, Dec 13 - Sun, Dec 20
Multiple Airlines Logo
5:15 pm - 8:10 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
2:25 pm - 3:45 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
30h 20m1 stop Dublin
$1,072Multiple Airlines
Fri, Mar 19 - Sat, Mar 27
Multiple Airlines Logo
6:15 pm - 7:50 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
9h 35m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 3:10 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
19h 20m2 stops Dublin Lisbon Humberto Delgado
$1,090Multiple Airlines
Sun, Nov 29 - Mon, Dec 14
Multiple Airlines Logo
5:15 pm - 8:10 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
9h 55m1 stop Dublin
Multiple Airlines Logo
8:35 am - 3:45 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
12h 10m1 stop Dublin
$1,092Multiple Airlines
Fri, Mar 19 - Sat, Mar 27
Multiple Airlines Logo
6:15 pm - 7:50 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
9h 35m1 stop Dublin
Multiple Airlines Logo
11:50 pm - 7:15 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
23h 25m1 stop Dublin
$1,096Multiple Airlines
Sat, Dec 12 - Sat, Dec 19
Multiple Airlines Logo
8:50 pm - 1:55 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
12h 05m1 stop Dublin
Multiple Airlines Logo
7:55 am - 7:05 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
40h 10m2 stops Alicante Casablanca Mohamed V
$1,117Multiple Airlines
Sat, Dec 12 - Sat, Dec 19
Multiple Airlines Logo
8:50 pm - 8:10 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
30h 20m1 stop Dublin
Multiple Airlines Logo
8:15 am - 3:45 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
12h 30m1 stop Dublin
$1,216Multiple Airlines
Sun, Dec 13 - Sun, Dec 20
Multiple Airlines Logo
7:40 pm - 11:45 amIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
35h 05m3 stops Reykjavik Keflavik Intl Manchester Belfast City
Multiple Airlines Logo
9:05 am - 3:45 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 40m2 stops Alicante Dublin
$1,229Multiple Airlines
Thu, Nov 19 - Fri, Nov 27
Multiple Airlines Logo
8:50 pm - 3:40 pmIAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
13h 50m1 stop Dublin
Multiple Airlines Logo
4:05 pm - 3:45 pmCWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
28h 40m1 stop Dublin
$1,241Multiple Airlines
Booking Insights

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

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

What is the cheapest Washington, D.C. to Cardiff flight route?

Washington, D.C. Reagan-National Airport (DCA) to Cardiff (CWL) is the cheapest Washington, D.C. to Cardiff route, averaging $1,005 round-trip. Other Washington, D.C. to Cardiff routes average $1,229, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from Washington, D.C. 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. 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. to Cardiff flights

Cheapest flight

$424
The most popular month to fly with an average 17% increase in travelers.
One-way flight 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 round-trip price

Your Washington, D.C. 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. to Cardiff?

    Only Economy Class is available on flights from Washington, D.C. to Cardiff.

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

    There are currently no nonstop flights available from Washington, D.C. to Cardiff. Flights with 1 layover take between 11h 34m and 12h 11m in total, depending on the connection.

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

    Round-trip flights from Washington, D.C. to Cardiff range from $1,005 to $1,465, with an average of $1,229 over the past 12 months. Anything below $1,005 counts as a good deal.

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

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about $1,057 to $1,881. That means the highest observed fare was about 77% higher than the lowest one.

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

    One-way fares from Washington, D.C. to Cardiff are currently lower than usual. Average one-way flight prices are about $485, which is 10% below the typical average for this route.

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

    Cardiff Wales Airport (CWL) hosts 5 major car rental companies, with daily rates averaging $66 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. to Cardiff?

    Flights from Washington, D.C. to Cardiff may depart from several airports in Washington, D.C. area, including Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD). Flights usually arrive at Cardiff Wales (CWL).

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

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

    • Amsterdam Schiphol (AMS) - 87% of one-stop connections
    • Toronto Pearson Intl (YYZ) - 13% of one-stop connections

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

    Yes. Flexible dates can save you up to 36% on flights from Washington, D.C. 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. to Cardiff?

    Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 11h 34m, compared with 12h 11m via Toronto Pearson Intl (YYZ).

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

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

Your guide to booking Washington, D.C. 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. to Cardiff trip for November. Fares historically average $942 round-trip in that month - typically $577 less than the most expensive month, which is September (based on the last 12 months).

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

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