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 $1,253. Another airline that can offer you cheap pricing is Delta.

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 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.

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

November can be a great time to fly to Cardiff from Washington, D.C. with a flight ticket averaging about $1,013. Cheapflights users have found deals in the month of November for as cheap as $735. The most expensive prices can be found in the month of May.

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.

$814+ 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	$829 (Air France)
Popular in	May
Cheapest in	November
Average price	$1,754

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

Search Deals

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

Search Deals

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

Search Deals

Highest demand for flights based on searches. 26% potential increase in price ($364 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease ($82 potential savings vs. average RT price).

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Average for round-trip flights in May 2025

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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 May 1, 2025.

Wed 8/205:25 pmIAD - CWL

1 stop18h 20mKLM

Wed 8/279:50 amCWL - IAD

1 stop10h 45mKLM

Deal found 4/30

$814

Wed 8/209:30 amIAD - CWL

2 stops18h 45mDelta

Wed 8/279:50 amCWL - IAD

1 stop10h 45mDelta

Deal found 4/30

$819

Wed 8/201:00 pmBWI - CWL

2 stops15h 15mMultiple Airlines

Wed 8/279:50 amCWL - BWI

2 stops16h 03mMultiple Airlines

Deal found 4/30

$829

Tue 7/18:45 pmIAD - CWL

2 stops18h 05mMultiple Airlines

Thu 7/317:55 amCWL - IAD

2 stops34h 47mMultiple Airlines

Deal found 4/30

$1,207

Tue 7/112:03 pmDCA - CWL

2 stops16h 12mDelta

Thu 7/319:50 amCWL - DCA

2 stops17h 32mDelta

Deal found 4/30

$1,268

Tue 7/19:40 amDCA - CWL

3 stops29h 10mMultiple Airlines

Thu 7/317:55 amCWL - DCA

3 stops33h 08mMultiple Airlines

Deal found 4/30

$1,273

Tue 7/110:29 amBWI - CWL

2 stops17h 46mDelta

Thu 7/319:50 amCWL - BWI

2 stops17h 14mDelta

Deal found 4/30

$1,429

Thu 6/191:34 pmBWI - CWL

2 stops14h 41mKLM

Fri 6/279:50 amCWL - BWI

2 stops15h 53mKLM

Deal found 4/30

$2,048

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 May 1, 2025.

Wed 8/201:00 pmBWI - CWL

2 stops15h 15mMultiple Airlines

Wed 8/279:50 amCWL - BWI

2 stops16h 03mMultiple Airlines

Deal found 4/30

$829

Tue 7/15:25 pmIAD - CWL

1 stop18h 20mKLM

Thu 7/319:50 amCWL - IAD

1 stop10h 45mKLM

Deal found 4/30

$1,253

Tue 7/112:13 pmIAD - CWL

2 stops16h 02mDelta

Thu 7/319:50 amCWL - IAD

1 stop10h 45mDelta

Deal found 4/30

$1,258

Tue 7/18:45 pmIAD - CWL

2 stops18h 05mMultiple Airlines

Thu 7/317:55 amCWL - IAD

2 stops34h 47mMultiple Airlines

Deal found 4/30

$1,207

Tue 7/112:03 pmDCA - CWL

2 stops16h 12mDelta

Thu 7/319:50 amCWL - DCA

2 stops17h 32mDelta

Deal found 4/30

$1,268

Tue 7/19:40 amDCA - CWL

3 stops29h 10mMultiple Airlines

Thu 7/317:55 amCWL - DCA

3 stops33h 08mMultiple Airlines

Deal found 4/30

$1,273

Tue 7/110:29 amBWI - CWL

2 stops17h 46mDelta

Thu 7/319:50 amCWL - BWI

2 stops17h 14mDelta

Deal found 4/30

$1,429

Thu 6/191:34 pmBWI - CWL

2 stops14h 41mKLM

Fri 6/279:50 amCWL - BWI

2 stops15h 53mKLM

Deal found 4/30

$2,048

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

Wed 8/20

5:25 pm-4:45 pm

1 stop18h 20m

Cardiff Wales

Wed 8/27

9:50 am-3:35 pm

1 stop10h 45m

$814

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 8/20

9:30 am-9:15 am

2 stops18h 45m

Cardiff Wales

Wed 8/27

9:50 am-3:35 pm

1 stop10h 45m

$819

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Wed 8/20

1:00 pm-9:15 am

2 stops15h 15m

Cardiff Wales

Wed 8/27

9:50 am-8:53 pm

2 stops16h 03m

$829

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 7/1

8:45 pm-7:50 pm

2 stops18h 05m

Cardiff Wales

Thu 7/31

7:55 am-1:42 pm

2 stops34h 47m

$1,207

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Tue 7/1

12:03 pm-9:15 am

2 stops16h 12m

Cardiff Wales

Thu 7/31

9:50 am-10:22 pm

2 stops17h 32m

$1,268

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Tue 7/1

9:40 am-7:50 pm

3 stops29h 10m

Cardiff Wales

Thu 7/31

7:55 am-12:03 pm

3 stops33h 08m

$1,273

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Tue 7/1

10:29 am-9:15 am

2 stops17h 46m

Cardiff Wales

Thu 7/31

9:50 am-10:04 pm

2 stops17h 14m

$1,429

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Thu 6/19

1:34 pm-9:15 am

2 stops14h 41m

Cardiff Wales

Fri 6/27

9:50 am-8:43 pm

2 stops15h 53m

$2,048

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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 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 and KLM. 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

7,934 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

7,934 reviews

Delta

8.0

Very good

7,934 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

1,334 reviews

Delta

8.0

Very good

7,934 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 $1,253. Another airline that can offer you cheap pricing is Delta.
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 Bristol flights

Dulles Intl to Cardiff flights

Reagan-National to Bristol flights

Reagan-National to Cardiff flights

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

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$713	Average$790	FlexibilityNo cancel fee	On-time75%

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$814+ 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 8/20. 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

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 May 1, 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 May 1, 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 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 May 1, 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

Get insights into the airlines that provide service to Cardiff. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cardiff. Reviews last updated May 1, 2025.

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

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 May 1, 2025.