What are the cheapest airlines flying from Washington, D.C. to Cardiff round-trip?

Cheapflights users have booked flights from Washington, D.C. to Cardiff round-trip from $862. Other airlines that can offer you cheap pricing are KLM, from $1,002, and Delta, from $1,006.

What is the cheapest day to fly from Washington, D.C. to Cardiff?

Travelers seeking maximum savings on their Washington, D.C. to Cardiff flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from Washington, D.C. to Cardiff?

The most popular flight routes from Washington, D.C. to Cardiff are Washington, D.C. Dulles Intl - Cardiff Wales, Baltimore/Washington - Cardiff Wales and Washington, D.C. Reagan-National - Cardiff Wales.

What is the cheapest day to fly round-trip from Washington, D.C. to Cardiff?

Flying to your destination on a Thursday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Cardiff. Check prices with Cheapflights to find a great deal for your trip.

Most accurate provider : When it comes to deals on Washington, D.C.-Cardiff flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C.-Cardiff flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Cardiff flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Washington, D.C.-Cardiff flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Cardiff flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly into for flights to Cardiff from Washington, D.C.?

Located just 9.1 mi from the city center, Cardiff Wales is the airport most travelers will use when flying to Cardiff from Washington, D.C.. Booking flights from Washington, D.C. to Cardiff Wales (CWL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. from 1 airline.

Can I find deals for flights from Washington, D.C. to Cardiff that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to Cardiff flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to Cardiff?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Cardiff.

Can I find deals for business class flights from Washington, D.C. to Cardiff?

Yes. Cheapflights offers flight deals from Washington, D.C. to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$765+ Flights from Washington, D.C. to Cardiff

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Cheap flight deals from Washington, D.C. to Cardiff

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$765 (Mytrip)

Provider with most accurate pricing for Washington, D.C. (WAS)-Cardiff Wales flight deals.

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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Cardiff Wales flights.

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From Washington, D.C. (WAS) to Cardiff Wales

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Find flight deals from Washington, D.C. to Cardiff

Cheapest flights from Washington, D.C. to Cardiff
Explore the most affordable flight options available from Washington, D.C. to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on מרץ 31, 2025.

ב' 5/128:25 pmIAD - CWL

1 stop14h 30mMultiple Airlines

ב' 5/191:10 pmCWL - IAD

1 stop10h 45mMultiple Airlines

Deal found 3/30

$765

ב' 5/126:00 amDCA - CWL

3 stops28h 55mMultiple Airlines

ב' 5/191:10 pmCWL - DCA

3 stops37h 43mMultiple Airlines

Deal found 3/30

$789

ב' 3/315:25 pmIAD - CWL

1 stop18h 20mDelta

א' 4/139:50 amCWL - IAD

1 stop10h 45mDelta

Deal found 3/30

$802

ב' 3/3112:34 pmDCA - CWL

2 stops15h 41mDelta

א' 4/139:50 amCWL - DCA

2 stops35h 01mDelta

Deal found 3/30

$811

ד' 8/205:25 pmIAD - CWL

1 stop10h 50mKLM

ד' 8/275:15 pmCWL - IAD

1 stop27h 20mKLM

Deal found 3/30

$845

ד' 8/2012:00 pmBWI - CWL

2 stops16h 15mKLM

ד' 8/279:50 amCWL - BWI

2 stops16h 53mKLM

Deal found 3/30

$859

ב' 5/126:00 amIAD - CWL

2 stops22h 15mVirgin Atlantic

ב' 5/199:50 amCWL - IAD

1 stop10h 45mVirgin Atlantic

Deal found 3/30

$862

א' 8/39:25 amBWI - CWL

2 stops18h 50mDelta

ש' 8/169:45 amCWL - BWI

2 stops16h 08mDelta

Deal found 3/30

$1,016

ה' 6/191:25 pmDCA - CWL

2 stops14h 50mKLM

ו' 6/279:50 amCWL - DCA

2 stops14h 09mKLM

Deal found 3/30

$1,060

ב' 5/128:30 pmBWI - CWL

2 stops14h 25mMultiple Airlines

ב' 5/191:10 pmCWL - BWI

3 stops35h 15mMultiple Airlines

Deal found 3/30

$1,075

ו' 10/109:20 pmIAD - CWL

2 stops14h 45mAir France

א' 10/129:50 amCWL - IAD

2 stops14h 25mAir France

Deal found 3/30

$1,247

ד' 8/2010:40 pmIAD - CWL

2 stops28h 40mAer Lingus

ד' 8/2712:00 pmCWL - IAD

2 stops32h 55mAer Lingus

Deal found 3/29

$1,264

Best flights from Washington, D.C. to Cardiff
Discover carefully curated flight deals from Washington, D.C. to Cardiff that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated מרץ 31, 2025.

ב' 5/128:25 pmIAD - CWL

1 stop14h 30mMultiple Airlines

ב' 5/191:10 pmCWL - IAD

1 stop10h 45mMultiple Airlines

Deal found 3/30

$765

ב' 5/126:00 amIAD - CWL

2 stops22h 15mVirgin Atlantic

ב' 5/199:50 amCWL - IAD

1 stop10h 45mVirgin Atlantic

Deal found 3/30

$862

ו' 6/65:25 pmIAD - CWL

1 stop10h 45mKLM

ד' 6/119:50 amCWL - IAD

1 stop10h 45mKLM

Deal found 3/30

$1,002

ו' 6/612:20 pmIAD - CWL

2 stops15h 50mDelta

ד' 6/119:50 amCWL - IAD

1 stop10h 45mDelta

Deal found 3/30

$1,006

ב' 5/126:00 amDCA - CWL

3 stops28h 55mMultiple Airlines

ב' 5/191:10 pmCWL - DCA

3 stops37h 43mMultiple Airlines

Deal found 3/30

$789

ה' 6/191:00 pmBWI - CWL

2 stops15h 15mDelta

ו' 6/279:50 amCWL - BWI

2 stops18h 26mDelta

Deal found 3/30

$1,060

ה' 6/191:25 pmDCA - CWL

2 stops14h 50mKLM

ו' 6/279:50 amCWL - DCA

2 stops14h 09mKLM

Deal found 3/30

$1,060

ב' 5/128:30 pmBWI - CWL

2 stops14h 25mMultiple Airlines

ב' 5/191:10 pmCWL - BWI

3 stops35h 15mMultiple Airlines

Deal found 3/30

$1,075

Last-minute flights from Washington, D.C. to Cardiff
Discover last-minute flight deals from Washington, D.C. to Cardiff. Data last updated מרץ 31, 2025 and is based on user searches.

ב' 3/315:25 pmIAD - CWL

1 stop18h 20mDelta

א' 4/139:50 amCWL - IAD

1 stop10h 45mDelta

Deal found 3/30

$802

ב' 3/3112:34 pmDCA - CWL

2 stops15h 41mDelta

א' 4/139:50 amCWL - DCA

2 stops35h 01mDelta

Deal found 3/30

$811

ב' 3/316:50 pmBWI - CWL

2 stops16h 05mMultiple Airlines

א' 4/135:20 pmCWL - BWI

2 stops29h 20mMultiple Airlines

Deal found 3/30

$1,110

ב' 3/3110:20 pmIAD - CWL

3 stops29h 55mMultiple Airlines

א' 4/138:45 pmCWL - IAD

3 stops27h 35mMultiple Airlines

Deal found 3/30

$1,556

ב' 3/3112:55 pmDCA - CWL

3 stops22h 00mMultiple Airlines

א' 4/1311:00 amCWL - DCA

2 stops13h 53mMultiple Airlines

Deal found 3/30

$1,754

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

ב' 5/12

8:25 pm-3:55 pm

1 stop14h 30m

Cardiff Wales

ב' 5/19

1:10 pm-6:55 pm

1 stop10h 45m

$765

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

ב' 5/12

6:00 am-3:55 pm

3 stops28h 55m

Cardiff Wales

ב' 5/19

1:10 pm-9:53 pm

3 stops37h 43m

$789

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

ד' 8/20

5:25 pm-9:15 am

1 stop10h 50m

Cardiff Wales

ד' 8/27

5:15 pm-3:35 pm

1 stop27h 20m

$845

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

ד' 8/20

12:00 pm-9:15 am

2 stops16h 15m

Cardiff Wales

ד' 8/27

9:50 am-9:43 pm

2 stops16h 53m

$859

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

ב' 5/12

6:00 am-9:15 am

2 stops22h 15m

Cardiff Wales

ב' 5/19

9:50 am-3:35 pm

1 stop10h 45m

$862

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

ה' 9/18

12:30 pm-9:15 am

2 stops15h 45m

Cardiff Wales

ג' 9/30

9:50 am-3:35 pm

1 stop10h 45m

$909

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

א' 8/3

9:25 am-9:15 am

2 stops18h 50m

Cardiff Wales

ש' 8/16

9:45 am-8:53 pm

2 stops16h 08m

$1,016

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

א' 8/3

11:00 am-9:15 am

2 stops17h 15m

Cardiff Wales

ש' 8/16

9:45 am-11:30 pm

2 stops18h 45m

$1,016

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

ה' 6/19

1:25 pm-9:15 am

2 stops14h 50m

Cardiff Wales

ו' 6/27

9:50 am-6:59 pm

2 stops14h 09m

$1,060

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

ב' 5/12

8:30 pm-3:55 pm

2 stops14h 25m

Cardiff Wales

ב' 5/19

1:10 pm-7:25 pm

3 stops35h 15m

$1,075

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 11 results

Most accurate provider: When it comes to deals on Washington, D.C.-Cardiff flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C.-Cardiff flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Cardiff flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C.-Cardiff flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Cardiff flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Washington, D.C. to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Washington, D.C. with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Cardiff

What is the cheapest month to book a flight from Washington, D.C. to Cardiff?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Cardiff (average of $773). Flying from Washington, D.C. to Cardiff in June is currently the most expensive (average of $1,622). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to CWL?

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to Cardiff at noon. If you’re flexible enough to do this you can expect to save up to 2% on your trip compared to booking a flight in the morning.

Rainfall in Cardiff by month

In terms of precipitation, rainfall in Cardiff ranges from 2.0 - 3.5 inches per month. January is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Cardiff when rainfall is around 2.0 in.

Temperature in Cardiff by month

If weather is an important factor for your trip to Cardiff, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Cardiff

To help decide which airline to fly from Washington, D.C. to Cardiff, see what other customers have to say about Delta, KLM and Virgin Atlantic. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,899 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.4

Good

636 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly into for flights to Cardiff from Washington, D.C.?
Located just 9.1 mi from the city center, Cardiff Wales is the airport most travelers will use when flying to Cardiff from Washington, D.C.. Booking flights from Washington, D.C. to Cardiff Wales (CWL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. from 1 airline.
What are the cheapest airlines flying from Washington, D.C. to Cardiff round-trip?
Cheapflights users have booked flights from Washington, D.C. to Cardiff round-trip from $862. Other airlines that can offer you cheap pricing are KLM, from $1,002, and Delta, from $1,006.
What are the most popular routes from Washington, D.C. to Cardiff?
The most popular flight routes from Washington, D.C. to Cardiff are Washington, D.C. Dulles Intl - Cardiff Wales, Baltimore/Washington - Cardiff Wales and Washington, D.C. Reagan-National - Cardiff Wales.
Can I find deals for flights from Washington, D.C. to Cardiff that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Cardiff flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Cardiff?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Cardiff.
Can I find deals for business class flights from Washington, D.C. to Cardiff?
Yes. Cheapflights offers flight deals from Washington, D.C. to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Washington, D.C. to Cardiff?
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Cardiff (average of $773). Flying from Washington, D.C. to Cardiff in June is currently the most expensive (average of $1,622). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Barry

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Alternative routes for Washington, D.C. to Cardiff

Dulles Intl to Manchester flights

Reagan-National to Manchester flights

Dulles Intl to Cardiff flights

Dulles Intl to Bristol flights

Reagan-National to Cardiff flights

Reagan-National to Bristol flights

Top airline flying from Washington, D.C. to Cardiff

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$713	Average$791	FlexibilityNo cancel fee	On-time75%

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$765+ Cheap flights from Washington, D.C. (WAS) to Cardiff (CWL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Cardiff with Cheapflights

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Cheap flight deals from Washington, D.C. to Cardiff

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Find flight deals from Washington, D.C. to Cardiff

Cheapest flights from Washington, D.C. to CardiffExplore the most affordable flight options available from Washington, D.C. to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on מרץ 31, 2025.

Explore the most affordable flight options available from Washington, D.C. to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on מרץ 31, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Cardiff that are best for you.

Best time to book a flight from Washington, D.C. to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Washington, D.C. with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Cardiff

What is the cheapest month to book a flight from Washington, D.C. to Cardiff?

What is the cheapest time of day to fly from WAS to CWL?

Find hourly flight availability from Washington, D.C. to Cardiff. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated מרץ 31, 2025.

Rainfall in Cardiff by month

Plan your trip to Cardiff by taking into account the average rainfall totals by month.

Temperature in Cardiff by month

Plan your trip to Cardiff by taking into account the average temperature totals by month.

Reviews of airlines servicing Cardiff

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Cardiff. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Cardiff from Washington, D.C.?

What are the cheapest airlines flying from Washington, D.C. to Cardiff round-trip?

What are the most popular routes from Washington, D.C. to Cardiff?

Can I find deals for flights from Washington, D.C. to Cardiff that include hotel bookings?

How can I find direct flights from Washington, D.C. to Cardiff?

Can I find deals for business class flights from Washington, D.C. to Cardiff?

What is the cheapest month to book a flight from Washington, D.C. to Cardiff?

Traveling to a place near Washington, D.C.?

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Alternative routes for Washington, D.C. to Cardiff

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Top airline flying from Washington, D.C. to Cardiff

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Cheapest flights from Washington, D.C. to Cardiff
Explore the most affordable flight options available from Washington, D.C. to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on מרץ 31, 2025.