Singapore (SIN) to Seattle (SEA) business class award flights

SEA → SIN

Lowest seen in the last 8 daysPlus fees$104.49Program

Atmos RewardsAirline

Philippine AirlinesDepartingThu, Oct 22

Last checked 7d agoChecked 14 Oct 2026, 13:05 UTC

Which program and airline costs you least

Singapore to Seattle in business class starts at 85K Atmos points plus $104.49 — Philippine Airlines through Atmos Rewards. Thai Airways through LifeMiles charges the least cash — $55.16 — but wants 90K miles.

Every way to book SIN to SEA with miles or points
Airline	Program
Philippine Airlinesvia MNLlast seen 14 Oct, not re-checked sinceAtmos Rewards	Atmos Rewards	Fewest points85K Atmos pointsplus $104.49	$104.49
Thai Airwaysvia BKK, TPElast seen 12 Oct, not re-checked sinceLifeMiles	LifeMiles	90Kplus $55.16	Lowest fees$55.16
Singapore Airlinesvia FRAlast seen 12 Oct, not re-checked sinceLifeMiles	LifeMiles	90Kplus $58.00	$58.00
United Airlinesvia SFOlast seen 12 Oct, not re-checked sinceLifeMiles	LifeMiles	90Kplus $90.85	$90.85
British Airwaysvia LHRlast seen 14 Oct, not re-checked sinceAtmos Rewards	Atmos Rewards	130K Atmos pointsplus $1,079.99	$1,079.99
Japan Airlinesvia NRTlast seen 14 Oct, not re-checked sinceAtmos Rewards	Atmos Rewards	200K Atmos pointsplus $101.59	$101.59
Starlux Airlinesvia TPElast seen 14 Oct, not re-checked sinceAtmos Rewards	Atmos Rewards	250K Atmos pointsplus $112.89	$112.89

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.

SIN to SEA in business class: the facts

Over the next 60 days we hold business class seats from Singapore to Seattle on 34 of the 34 departure days we have checked so far (26 days are not checked yet), through 2 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 October 14, 2026.

Atmos Rewards
Days with space
34 of 34 checked
Lowest
85,000 Atmos points
Typical day
200,000 Atmos points
Cash on top
$102 to $1,080
LifeMiles
Days with space
6 of 34 checked
Lowest
90,000 miles
Typical day
90,000 miles
Cash on top
$55 to $58

SIN to SEA business class seats per program over the next 60 days
Program	Days with space	Lowest	Typical day	Cash on top
Atmos Rewards	34 of 34 checked	85,000 Atmos points	200,000 Atmos points	$102 to $1,080
LifeMiles	6 of 34 checked	90,000 miles	90,000 miles	$55 to $58

Nonstop or with a connection

No nonstop seats in the window. With a connection on British Airways, Japan Airlines, Philippine Airlines, Singapore Airlines, Starlux Airlines, Thai Airways and United Airlines.

How to book it

Atmos Rewards books on alaskaair.com: sign in there, search SIN to SEA in business class on a date with space, and pay in Atmos points with the cash on top (from $102).
LifeMiles books on lifemiles.com: sign in there, search SIN to SEA in business class on a date with space, and pay in miles with the cash on top (from $55).

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

More routes

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Every route we watch from Singapore (SIN)

Get told the moment a SIN → SEA seat opens.

We re-check that exact seat seconds before the email leaves, so what you open is still there.

Email only. Searching this route stays free for departures in the next 60 days.