Washington to London DCA, IAD → LGW, LHR, LTN
Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) → London Gatwick Airport (LGW), London Heathrow Airport (LHR), London Luton Airport (LTN)
The cheapest return found recently is $773 with Icelandair, 7 Dec – 10 Jan 2027, found yesterday. The cheapest one-way found recently is $312 with jetBlue, 1 Dec, found 2 days ago.
Return
The cheapest return fare on each of 4 departure dates is usually $731 to $955.
Cheapest return found recently
$773
7 Dec – 10 Jan 2027 · Icelandair
Washington Dulles International Airport (IAD) → London Heathrow Airport (LHR)
Leaves 7:40 p.m. · Return leaves 8:35 p.m. · 37 h 5 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$773 7 Dec – 10 Jan 2027found yesterdaySee prices for these dates
$604 8 Jan 2027 – 15 Jan 2027found 2 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $395 to $712.
At $773, the cheapest return found recently is above that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 20 Nov to 8 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 34-night return fares leaving within 3 days of 7 Dec to compare.
Every date we hold
6 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Nov – 29 Nov | $1,130 | Air Canada | Ronald Reagan National Airport (DCA) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 29 Nov – 4 Dec | $896 | jetBlue | Ronald Reagan National Airport (DCA) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 7 Dec – 10 Jan 2027 | $773 | Icelandair | Washington Dulles International Airport (IAD) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 8 Jan 2027 – 15 Jan 2027 | $604 | Air Canada | Ronald Reagan National Airport (DCA) → London Luton Airport (LTN) | out 3 stops, back 2 stops | found 2 days ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $604.
Airlines on the cheapest dates: Air Canada, jetBlue, Icelandair.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $321 to $343.
Cheapest one-way found recently
$312
1 Dec · jetBlue
Ronald Reagan National Airport (DCA) → London Heathrow Airport (LHR)
Leaves 3:35 p.m. · 10 h 20 min trip
1 stop
found 2 days ago
Cheapest nonstop one-way
$364
16 Sept 2027 · British Airways
Washington Dulles International Airport (IAD) → London Heathrow Airport (LHR)
Leaves 10:25 p.m. · 7 h 25 min trip
nonstop
found 6 days ago
Found recently, and the cheapest we hold
$312 1 Decfound 2 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 24 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $269 to $359.
24 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 1 Dec to 16 Sept 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 1 Dec to compare.
Every date we hold
5 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 1 Dec | $312 | jetBlue | Ronald Reagan National Airport (DCA) → London Heathrow Airport (LHR) | 1 stop | found 2 days ago | Open this trip |
| 9 Dec | $330 | Icelandair | Washington Dulles International Airport (IAD) → London Heathrow Airport (LHR) | 1 stop | found 6 days ago | Open this trip |
| 16 Sept 2027 | $356 | Air Canada | Ronald Reagan National Airport (DCA) → London Heathrow Airport (LHR) | 1 stop | found 6 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $312.
Airlines on the cheapest dates: jetBlue, Icelandair, Air Canada.
Premium cabin fares from Washington to London
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 7 Dec – 10 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 1 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Washington to London?
Return
Fares 60 to 89 days before departure were typically 42% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $881 | $562 | +72% | 11 |
| 7–13 days | $782 | $607 | +53% | 19 |
| 14–29 days | $809 | $395 | +58% | 15 |
| 30–59 days | $642 | $489 | +25% | 22 |
| 60–89 days | $512 | $466 | Cheapest seen | 24 |
| 90–179 days | $712 | $523 | +39% | 14 |
One-way
The cheapest fares were 30 to 59 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (24 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 30–59 days | $291 | $269 | Cheapest seen | 16 |
| 90–179 days | $322 | $322 | +11% | 8 |
| 180+ days | $359 | $356 | +24% | 15 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Baltimore → London
57 km from Washington
$841
$68 more than flying from Washington
7 Dec – 10 Jan 2027 · BWI → LHR · out 1 stop, back 1 stop
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Baltimore → London
57 km from Washington
$378
$66 more than flying from Washington
16 Sept 2027 · BWI → LHR · nonstop
found 6 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 7 Dec – 10 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work