The cheapest times to fly from IAD to LGW are
- January 8th to March 25th
- April 23rd to May 6th
- September 10th to December 9th (except the week of October 8th)
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAD to LGW is late January. Prices can be as high as $1252 for Saturday flights during late July, or as low as $388 for Wednesday flights around late January.
When to Fly to London
Flying from Washington, DC (IAD) to London (LGW) will usually cost between $436 to $997 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $466. Due to high demand the most expensive time to fly is late July, with an average price of $1009. Planning your trip to low-cost times can easily save you $543 on economy flights and even more on first-class flights. Generally, any price below $588 can be considered a good price for a round-trip IAD to LGW flight.
See below for a graph of average weekly prices for the IAD to LGW route. All prices are for round-trip tickets in USD.
Compared to other flights, the IAD to LGW flight is cheaper than the average and costs much less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.1, which is far below average.
Flight Prices by Day of the Week
Wednesday is usually the cheapest day to fly to LGW, and Monday the cheapest day to fly back into IAD. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $127 (17%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $596. Return trip prices are from the LGW to IAD flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from IAD to LGW can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 7 hour 37 minutes may not be realistic.
Alternative Nearby Airports
Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from IAD to LGW while comparing.
- 25 miles (40 km) away from LGW
- Usually 11.66% less expensive than LGW
- Nonstop flights available
Flight Hacking IAD to LGW
Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from IAD to LGW — but Champion Traveler does!
- Price for both tickets: $510
- Average savings: $78 (13.28%)
- Price for both tickets: $555
- Average savings: $33 (5.62%)
Flight Questions Answered
Still have questions about flying from IAD to LGW? We’ve got answers.
Which airlines fly this route?
You can find 33 major airlines flying this route most often: Aer Lingus, Aeroflot, Aeromexico, Air Canada, Air Europa, Air France, AIRDIALOG, Alaska, American, Austrian, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Norwegian, Norwegian Air International, Norwegian Air UK, Porter Airlines, Royal Air Maroc, SAS, Smartwings, SWISS, Tap Air Portugal, Turkish Airlines, Ukraine International, United, Virgin Atlantic, WestJet, Wizz Air, and potentially more during busy seasons.
How far away is it from London Gatwick Airport to Washington Dulles International Airport?
The distance between the two airports is roughly 3685 miles or 5930 kilometers.
How long does it take to fly from IAD to LGW?
The real-world flight time for a nonstop IAD to LGW flight is about 7 hour 37 minutes.
How many flights go between Washington, DC and London?
It depends on the day of the week and the date, but a typical day might have around 64 available flights from IAD to LGW.
Airport Location Info
|Origination airport name||Washington Dulles International Airport|
|Country||the United States|
|Destination airport name||London Gatwick Airport|
|Country||the United Kingdom|
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.