$469 Cheap Flights from United Kingdom to Washington Dulles International
One-way
Departing from
United Kingdom
Going to
Washington Dulles International
Washington, D.C. (IAD)
United States • May, 2026
79% AI deal score
$1,005 $527
Washington, D.C. (IAD)
United States • December, 2025
74% AI deal score
$2,835 $631
Top Cheap Flight Deals from United Kingdom to Washington Dulles International
Recent round-trip flight deals to Washington Dulles International
Wed, Jan 14 - Thu, Jan 22
Cheapest
London (LHR) - Washington, D.C. (IAD)
Icelandair airlines • 1 stop • Reykjavik (KEF)
Washington, D.C. (IAD) - London (LHR)
Icelandair airlines • 1 stop • Reykjavik (KEF)
$735
$525
-$210
29%
Wed, Jan 28 - Thu, Feb 5
London (LHR) - Washington, D.C. (IAD)
Icelandair airlines • 1 stop • Reykjavik (KEF)
Washington, D.C. (IAD) - London (LHR)
Icelandair airlines • 1 stop • Reykjavik (KEF)
$735
$538
-$197
27%
Wed, Feb 11 - Tue, Feb 17
London (LHR) - Washington, D.C. (IAD)
Icelandair airlines • 1 stop • Reykjavik (KEF)
Washington, D.C. (IAD) - London (LHR)
Icelandair airlines • 1 stop • Reykjavik (KEF)
$735
$552
-$183
25%
Thu, Apr 16 - Fri, Apr 24
London (LHR) - Washington, D.C. (IAD)
Icelandair airlines • 1 stop • Reykjavik (KEF)
Washington, D.C. (IAD) - London (LHR)
Icelandair airlines • 1 stop • Reykjavik (KEF)
$750
$567
-$183
24%
Wed, Apr 22 - Sat, Apr 25
London (LHR) - Washington, D.C. (IAD)
Icelandair airlines • 1 stop • Reykjavik (KEF)
Washington, D.C. (IAD) - London (LHR)
Icelandair airlines • 1 stop • Reykjavik (KEF)
$750
$588
-$162
22%
Fri, Feb 13 - Sat, Mar 14
London (LHR) - Washington, D.C. (IAD)
Brussels Airlines airlines • 1 stop • Brussels (BRU)
Washington, D.C. (IAD) - London (LHR)
Austrian Airlines airlines • Direct
$735
$583
-$152
21%
The cheapest time to fly to Washington Dulles International
Last-Minute Flights from United Kingdom to Washington Dulles International
Need to get to Washington Dulles International ASAP? Even if you're booking a flight on short notice, there are often last-minute deals available:
Next 2 weeks deals
Last Minute Flight Deals!
Find flights to Washington, D.C. departing in the next two weeks starting from $1310.
⌛ Last-Minute
London - IAD
A great last-minute steal for a cross-country flight.
Found 1 week ago
$5366
round-trip
Facts About Flights from United Kingdom to Washington, D.C.
To help you plan your journey, here are some quick Washington, D.C. flight facts and tips.
Washington, D.C. airports
Washington Dulles International Airport (IAD) is a major international airport located in Dulles, Virginia, about 26 miles west of Washington, D.C. Known for its iconic main terminal designed by Eero Saarinen, Dulles serves as a primary hub for United Airlines and offers extensive domestic and international flights. Passengers can access a wide array of amenities, including numerous dining and shopping options, lounges, and ground transportation services like the Silver Line Metro. Baltimore/Washington International Thurgood Marshall Airport (BWI) is located in Anne Arundel County, Maryland, approximately 32 miles northeast of Washington, D.C. BWI is a hub for Southwest Airlines and Spirit Airlines, focusing on domestic travel with a growing number of international routes. The airport is known for its convenient amenities, including free Wi-Fi, charging stations, and a wide selection of restaurants and shops. BWI offers efficient ground transportation options, such as the Penn Line train to D.C. and Baltimore. Ronald Reagan Washington National Airport (DCA), situated just across the Potomac River from Washington, D.C., is the closest airport to the city. With its convenient location, DCA primarily handles domestic flights, with a limited number of exceptions. The airport is easily accessible via the Metro's Blue and Yellow lines, making it a popular choice for travelers heading directly into the city. DCA features a variety of dining and shopping options, along with views of the D.C. monuments.
Washington Dulles International (IAD)
Washington, D.C., United States
Baltimore–Washington International (BWI)
Washington, D.C., United States
Ronald Reagan Washington National (DCA)
Washington, D.C., United States
Pro tip: search “Washington, D.C. (Any)” to see fares to all Washington, D.C. airports – sometimes one is cheaper than the others on your dates.
Insights for flights to Washington Dulles International
Cheapest airport
Baltimore/Washington International Thurgood Marshall Airport (BWI)
Hey there, savvy traveler! While Washington Dulles International Airport (IAD) is your target, don't sleep on Baltimore/Washington International Thurgood Marshall Airport (BWI) – it's often the wallet-friendliest gateway to the D.C. area! BWI is known for its efficiency, easy navigation, and a solid range of amenities, making it a smart choice. Plus, it boasts a convenient rail link to Washington, D.C., ensuring you're not sacrificing convenience for cost savings! It's a win-win for your travel budget and your sanity.
IAD Airport Deal Stats
Current most discounted routes
Avg. most discounted routes (last 3 months)
IAD airport insights
Best days to catch a deal
Wed, Sat
Based on the data, Wednesday has the highest count, suggesting it's the best day to find cheap deals from Washington Dulles International Airport. Sunday and Friday also show promising counts, indicating they could be good days to search for flight deals as well.
Avg. deal survival time
9.6 hours
Deals from Washington Dulles International Airport typically last around 9.6 hours. This means that the best fares disappear in less than half a day, so you should book quickly when you see a good price.
Rare deal frequency
8 deals
We found 8 rare deals for flights from Washington Dulles International in the past month, thanks to our advanced AI deal-finding techniques. These rare deals earned an AI Deal Score of 90+, and typically include mistake fares, special promotions, or ultra-discounts.
Average price drop
-76%
The average price drop from Washington Dulles International Airport is 75.8%, which means you could save a significant amount on your flight. This could be an opportune time to book flights from this airport and snag a great deal.
Next 4 weeks: deal forecast
IAD Flight Forecast (Next Month)
Based on current trends, flight prices from Washington Dulles International are expected to remain stable with a slight decrease anticipated mid-January. There are no major price increases forecasted at this time.
Top 5 biggest price drops (last 3 months)
Found on December 3
Madang - IAD
$6,550 → $1,061
84%
Found on December 3
Dortmund - IAD
$3,350 → $552
84%
Found on December 8
Koror - IAD
$5,200 → $993
81%
Found on December 8
São Paulo - IAD
$1,175 → $249
79%
Found on December 3
San José - IAD
$2,413 → $512
79%
Check these nearby airports too
Looking for more options? These airports near IAD sometimes drop rare deals too:
Baltimore–Washington International (BWI)
~12 rare deals/month
Richmond International (RIC)
~10 rare deals/month
If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially BWI and RIC for long-haul deal surprises.
When Is the Best Time to Fly from United Kingdom to Washington Dulles International
Timing is everything when hunting for cheap flights. Here are data-backed insights on the best times to fly to Washington Dulles International:
Cheapest month
January
Cheapest month
If you're dreaming of monuments and museums without the crowds, January is your golden ticket to Washington, D.C.! The city transforms into a serene wonderland, offering a peaceful escape and fantastic deals. Just picture yourself strolling through the National Mall, practically having the Smithsonian all to yourself!
Best day to book
Tuesday
Best day to book
Snagging the best flight deal is an art, and Tuesdays are your paintbrush! Airlines often release their deals early in the week, making Tuesday the prime day to pounce on those discounts. So set your reminders and make Tuesday your travel planning day.
Cheapest days to fly
Wednesday
Cheapest days to fly
Looking to save some serious dough on your flights? Wednesday might just be your lucky day! Flying mid-week often translates to lower fares, as business travel dips and airlines try to fill those seats. Pack your bags for a Wednesday departure and watch those savings soar!
Advance booking sweet spot
2 Months
Advance booking sweet spot
For Washington, D.C., booking about two months ahead hits that sweet spot. You'll have a better chance of snagging ideal flight times and prices before they skyrocket. It's the perfect balance between planning and spontaneity!
Washington Dulles International Airports & Ground Transportation
One big question for travelers is which Washington Dulles International airport to fly into. Here’s a quick guide to Washington Dulles International’s airports and how to get to the city from each:
Washington Dulles International Airport (IAD)
Washington Dulles International Airport, or IAD, is a major airport serving the Washington, D.C. metropolitan area. Located about 26 miles west of downtown D.C., in Virginia, Dulles is a hub for United Airlines and offers a wide range of domestic and international flights. The airport boasts a variety of amenities, including numerous restaurants, shops, and lounges, ensuring a comfortable travel experience. Its iconic main terminal, designed by Eero Saarinen, is an architectural marvel. Getting to downtown D.C. is easy via the Silver Line Metrorail, Washington Flyer Silver Line Express bus, or ride-sharing services.
Tip: Consider using the Silver Line Metrorail to avoid traffic when traveling to and from the city.
Ronald Reagan Washington National Airport (DCA)
Ronald Reagan Washington National Airport, or DCA, is the closest airport to downtown Washington, D.C., situated just across the Potomac River in Arlington, Virginia. DCA is known for its convenience and stunning views of the D.C. monuments during take-off and landing. The airport offers a variety of dining and shopping options, as well as easy access to the city. However, DCA has some restrictions on long-distance flights. You can reach downtown D.C. quickly via the Yellow and Blue Line Metrorail, taxis, or ride-sharing services.
What to Do in Washington, D.C.
Washington, D.C. isn’t just about getting there – it’s about enjoying the country once you arrive! Here are some top things to do in Washington, D.C., organized by interest:
Sightseeing & landmarks
Get ready to be wowed by iconic landmarks like the White House, the U.S. Capitol Building, and the Washington Monument! Don't forget to explore the moving memorials dedicated to past presidents and war heroes. Each site tells a piece of American history, making for an unforgettable sightseeing adventure!
Arts & culture
Dive into D.C.'s vibrant arts scene with world-class museums like the Smithsonian National Museum of Natural History and the National Gallery of Art. Catch a show at the historic Ford's Theatre or explore contemporary works at the Hirshhorn Museum. The city's cultural offerings are as diverse as they are captivating!
Food & nightlife
D.C.'s food scene is a delicious melting pot, offering everything from Michelin-starred restaurants to cozy neighborhood eateries. After dark, the city comes alive with lively bars, music venues, and rooftop lounges. Whether you're craving a gourmet meal or a night of dancing, D.C. has something to satisfy every taste.
Shopping & fashion
Shop 'til you drop in D.C.'s diverse retail districts, from high-end boutiques in Georgetown to unique finds in Eastern Market. Explore the latest fashion trends, discover local crafts, and bring home one-of-a-kind souvenirs. D.C. is a shopper's paradise with a touch of political chic!
Nearby getaways
Events in Washington, D.C. This Month
winter wonderfest at nationals park
Experience the magic of the holiday season at the inaugural Winter Wonderfest, held at Nationals Park on select dates from November 28th to December 24th. Washington, D.C.'s renowned baseball stadium will be transformed into a captivating winter wonderland, offering festive activities and attractions for all ages.
open mic event
Experience the thrill of live music at our special Open Mic Night! Hosted by Sounds & Spirits, this event offers free entry and features a live band to accompany your performance. Enjoy signature cocktails, delicious food, tropical vibes, and punny neon signs while showcasing your talent.
dungeons and dragons (session 3)
Delve into a world of mystery and imagination as you craft your own ghostly tales. Unleash your creativity and storytelling skills in this classic fantasy setting, where shadows whisper forgotten languages.
beginner
Discover the fundamentals of swing dancing in our beginner class series. Learn essential steps like the six-count, eight-count Lindy Whip and Circle, as well as side-by-side and Back Charleston variations. No partner is needed to participate.
Washington, D.C. Weather
Weather in Washington, D.C.
Tue, Dec 9
15%
0° -10°
15%
Wed, Dec 10
Frequently Asked Questions About Flights to Washington Dulles International
Pro Tips for Finding Cheap Flights to Washington Dulles International
Finally, to wrap up, here’s a cheat sheet of pro tips that experienced travelers use to save on Washington Dulles International flights:
Be Flexible with Dates: Sometimes, flying a day earlier or later can drastically cut costs. Mid-week flights are often cheaper than weekends. Play around with your dates to see where the deals hide!
Consider Nearby Airports: Dulles isn't the only game in town! Check flights into Reagan National or Baltimore-Washington International. You might snag a cheaper flight and not be too far from your final destination.
