Seattle (SEA) to London (LHR) business class award flights

In business class from Seattle (SEA) to London (LHR), the best value is also the fewest miles: 70,000 Atmos points plus $26 on Alaska Airlines through Atmos Rewards (checked 3 Nov 2026).

LHR → SEA

Best value right nowPlus fees$25.60Program

Atmos RewardsAirline

Alaska AirlinesDepartingThu, Nov 5

Checked 30 min agoChecked 3 Nov 2026, 07:42 UTC

Which program and airline costs you least

Seattle to London in business class: is 70K Atmos points + $25.60 — Alaska Airlines through Atmos Rewards.

Every way to book SEA to LHR with miles or points
Airline	Program
Alaska AirlinesBest valuevia RDUAtmos Rewards	Atmos Rewards	70K Atmos pointsplus $25.60	$25.60
American Airlinesvia DFWAtmos Rewards	Atmos Rewards	70K Atmos pointsplus $25.60	$25.60
Delta Air LinesNonstopDelta SkyMiles	Delta SkyMiles	125Kplus $5.60	$5.60
Air Francevia CDGAir France-KLM Flying Blue	Air France-KLM Flying BlueStandard fare	124.5Kplus $353.90	$353.90
Seen earlier, not re-checked since
Air Canadavia YVRlast seen 21 Oct, not re-checked sinceLifeMiles	LifeMiles	81Kplus $27.80	$27.80
British AirwaysNonstoplast seen 27 Oct, not re-checked sinceBritish Airways Club	British Airways Club	99K AviosFees not quoted	Not quoted

Where the space is over the next 60 days

Dashed days are prices last seen more than 3 days ago and not re-checked since.

SEA to LHR in business class: the facts

Over the next 60 days we hold business class seats from Seattle to London on 60 of the 60 departure days, through 5 programs. These figures are counted from the seats stored for those dates, not from a price history; the typical day is the median of each day's cheapest seat. Data updated November 3, 2026.

Atmos Rewards
Days with space
58 of 60
Lowest
70,000 Atmos points
Typical day
70,000 Atmos points
Cash on top
$6 to $1,574
LifeMiles
Days with space
1 of 60
Lowest
81,000 miles
Typical day
81,000 miles
Cash on top
$28
British Airways Club
Days with space
21 of 60
Lowest
99,000 Avios
Typical day
99,000 Avios
Cash on top
Not quoted
Air France-KLM Flying Blue
Days with space
24 of 60
Lowest
124,500 miles
Typical day
295,500 miles
Cash on top
$354
Delta SkyMiles
Days with space
60 of 60
Lowest
125,000 miles
Typical day
385,000 miles
Cash on top
$6 to $35

SEA to LHR business class seats per program over the next 60 days
Program	Days with space	Lowest	Typical day	Cash on top
Atmos Rewards	58 of 60	70,000 Atmos points	70,000 Atmos points	$6 to $1,574
LifeMiles	1 of 60	81,000 miles	81,000 miles	$28
British Airways Club	21 of 60	99,000 Avios	99,000 Avios	Not quoted
Air France-KLM Flying Blue	24 of 60	124,500 miles	295,500 miles	$354
Delta SkyMiles	60 of 60	125,000 miles	385,000 miles	$6 to $35

Nonstop or with a connection

Nonstop seats on Alaska Airlines, British Airways and Delta Air Lines. With a connection on Air Canada, Air France and American Airlines.

How to book it

Atmos Rewards books on alaskaair.com: sign in there, search SEA to LHR in business class on a date with space, and pay in Atmos points with the cash on top (from $6).
LifeMiles books on lifemiles.com: sign in there, search SEA to LHR in business class on a date with space, and pay in miles with the cash on top (from $28).
British Airways Club books on avios.com: sign in there, search SEA to LHR in business class on a date with space, and pay in Avios with the cash on top.
Air France-KLM Flying Blue books on airfrance.fr: sign in there, search SEA to LHR in business class on a date with space, and pay in miles with the cash on top (from $354).
Delta SkyMiles books on delta.com: sign in there, search SEA to LHR in business class on a date with space, and pay in miles with the cash on top (from $6).

MilesZone finds the seat; it does not book it or take payment.

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