Seattle (SEA) to Cancun (CUN) business class award flights

CUN → SEA

Cheapest right nowPlus fees$55.44Program

LifeMilesAirline

Air CanadaDepartingSat, Nov 7

Last checked 20h agoChecked 21 Oct 2026, 08:45 UTC

Which program and airline costs you least

Seattle to Cancun in business class starts at 27K miles plus $55.44 — Air Canada through LifeMiles.

Every way to book SEA to CUN with miles or points
Airline	Program
Air Canadavia YYZLifeMiles	LifeMiles	Fewest miles27Kplus $55.44	Lowest fees$55.44
United Airlinesvia SFO, IAHLifeMiles	LifeMiles	27Kplus $58.00	$58.00
American Airlinesvia DFWAtmos Rewards	Atmos Rewards	35K Atmos pointsplus $82.85	$82.85
Alaska Airlinesvia AUSAtmos Rewards	Atmos Rewards	35K Atmos pointsplus $82.85	$82.85
Delta Air LinesNonstopAir France-KLM Flying Blue	Air France-KLM Flying BlueStandard fare	60Kplus $90.75	$90.75

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 CUN in business class: the facts

Over the next 60 days we hold business class seats from Seattle to Cancun on 43 of the 43 departure days we have checked so far (17 days are not checked yet), through 3 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 21, 2026.

LifeMiles
Days with space
9 of 43 checked
Lowest
27,000 miles
Typical day
27,000 miles
Cash on top
$55 to $86
Atmos Rewards
Days with space
39 of 43 checked
Lowest
35,000 Atmos points
Typical day
35,000 Atmos points
Cash on top
$83 to $88
Air France-KLM Flying Blue
Days with space
8 of 43 checked
Lowest
60,000 miles
Typical day
60,000 miles
Cash on top
$91 to $95

SEA to CUN business class seats per program over the next 60 days
Program	Days with space	Lowest	Typical day	Cash on top
LifeMiles	9 of 43 checked	27,000 miles	27,000 miles	$55 to $86
Atmos Rewards	39 of 43 checked	35,000 Atmos points	35,000 Atmos points	$83 to $88
Air France-KLM Flying Blue	8 of 43 checked	60,000 miles	60,000 miles	$91 to $95

Nonstop or with a connection

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

How to book it

LifeMiles books on lifemiles.com: sign in there, search SEA to CUN in business class on a date with space, and pay in miles with the cash on top (from $55).
Atmos Rewards books on alaskaair.com: sign in there, search SEA to CUN in business class on a date with space, and pay in Atmos points with the cash on top (from $83).
Air France-KLM Flying Blue books on airfrance.fr: sign in there, search SEA to CUN in business class on a date with space, and pay in miles with the cash on top (from $91).

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

More routes

Get told the moment a SEA → CUN 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.