Cheap Flights from London to Washington, D.C.
No deal from London to Washington, D.C. has cleared our price bar yet. What we have seen on the route is below.
Across 3 months of observations from London to Washington, D.C., the lowest round-trip fare we recorded was $425, in September. The typical fare was $493. September was the cheapest month we saw and August the dearest.
The most recent price we saw on this route was $544 on Icelandair, seen Oct 15. It is an unverified observation and may have changed.
See every deal <a href="/from/london">from London</a>, <a href="/to/washington-dc">to Washington, D.C.</a>, or the return direction <a href="/from/washington-dc/to/london">Washington, D.C. to London</a>.
Latest price we saw: London to Washington, D.C.
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| London (LHR) to Washington, D.C. (IAD) | $544 | 7.4¢ | Mar 12 – Mar 21 | Icelandair | Oct 15 | Check price |
Price history: London to Washington, D.C.
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $483 | $510 | 3 |
| Sep 2026 | $425 | $448 | 3 |
| Aug 2026 | $497 | $521 | 8 |
Frequently asked questions
How many flight deals from London to Washington, D.C. are on Sparkflights right now?
There are 0 verified deals from London to Washington, D.C. on the board right now. The list refreshes hourly.
What is the lowest price ever seen from London to Washington, D.C.?
The lowest fare we've recorded from London to Washington, D.C. is $425, based on 14 price observations over 3 months.
How much does a flight from London to Washington, D.C. cost?
The typical round-trip fare we observed from London to Washington, D.C. is $493, against a recorded low of $425. These are observations, not quotes.
When is the cheapest month to fly London to Washington, D.C.?
September was the cheapest month we observed from London to Washington, D.C. and August the dearest, over 3 months of data.
What is the current price from London to Washington, D.C.?
The most recent fare our sweep saw from London to Washington, D.C. is $544, on Oct 15. It is an unverified observation rather than a verified deal, so check it before booking.