Cheap flights from Cardiff to Washington, D.C. from £646
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Cardiff to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 13 June 2025.
Find flight deals from Cardiff to Washington, D.C.
Cheapest flights from Cardiff to Washington, D.C.Explore the most affordable flight options available from Cardiff to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.
Explore the most affordable flight options available from Cardiff to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Cardiff to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 13 June 2025.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
CardiffWashington, D.C.
CWL - IAD
CWLIAD
Cardiff Wales
Tue 8/7
17:15-15:35
1 stop27h 20m
Washington, D.C. Dulles Intl
Wed 16/7
13:00-09:15
2 stops15h 15m
CardiffWashington, D.C.
CWL - DCA
CWLDCA
Cardiff Wales
Tue 8/7
09:50-23:35
2 stops18h 45m
Washington, D.C. Reagan-National
Tue 15/7
10:19-09:15
2 stops17h 56m
CardiffBaltimore
CWL - BWI
CWLBWI
Cardiff Wales
Wed 9/7
09:50-22:04
2 stops17h 14m
Baltimore/Washington
Wed 16/7
12:27-09:15
2 stops15h 48m
CardiffWashington, D.C.
CWL - IAD
CWLIAD
Cardiff Wales
Wed 9/7
09:50-11:32
2 stops30h 42m
Washington, D.C. Dulles Intl
Wed 16/7
06:00-09:15
2 stops22h 15m
CardiffWashington, D.C.
CWL - IAD
CWLIAD
Cardiff Wales
Wed 9/7
09:50-15:35
1 stop10h 45m
Washington, D.C. Dulles Intl
Sun 13/7
20:31-16:45
2 stops15h 14m
CardiffWashington, D.C.
CWL - IAD
CWLIAD
Cardiff Wales
Thu 10/7
09:50-19:15
2 stops14h 25m
Washington, D.C. Dulles Intl
Tue 15/7
17:25-09:15
1 stop10h 50m
CardiffWashington, D.C.
CWL - IAD
CWLIAD
Cardiff Wales
Thu 10/7
09:50-15:35
1 stop10h 45m
Washington, D.C. Dulles Intl
Tue 15/7
17:25-16:45
1 stop18h 20m
CardiffWashington, D.C.
CWL - DCA
CWLDCA
Cardiff Wales
Sun 22/6
10:00-20:46
2 stops15h 46m
Washington, D.C. Reagan-National
Fri 27/6
14:55-09:15
2 stops13h 20m
CardiffBaltimore
CWL - BWI
CWLBWI
Cardiff Wales
Sun 22/6
10:00-20:43
2 stops15h 43m
Baltimore/Washington
Fri 27/6
12:32-09:15
2 stops15h 43m
Best time to book a flight from Cardiff to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Cardiff with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Cardiff to Washington, D.C.
What is the cheapest month to book a flight from Cardiff to Washington, D.C.?
Currently, February is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £565). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £946). 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.
Rainfall in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.
Temperature in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Washington, D.C., 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).
Reviews of airlines servicing Washington, D.C.
Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated 13 June 2025.
To help decide which airline to fly from Cardiff to Washington, D.C., see what other customers have to say about Delta, KLM and Air France. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Comfort
Entertainment
Overall
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from Cardiff to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Cardiff?
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Alternative routes for Cardiff to Washington, D.C.
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