Cancún (CUN) to Seattle (SEA)
Flight time
≈ 6h 10m
Bearing
321° NW
Cancún (CUN) to Seattle (SEA) is 2,685 miles (4,320 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies CUN–SEA
Filed traffic dataIn May 2026, Delta Air Lines operated the most departures, one of 2 carriers flying nonstop CUN–SEA; the Airbus A321neo was the most common aircraft at 72% of departures; flights ran 79% full.
Departures
86
May 2026
Seats
16,283
both directions
Passengers
12,854
both directions
Load factor
78.9%
RPM ÷ ASM
Who flies CUN–SEA?
Delta Air Lines operated the most nonstop CUN–SEA departures in May 2026 (62), one of 2 carriers on the route.
- DL
62 departures · 12,028 seats
Share of departures72.1%81.0%
Load
- AS
24 departures · 4,255 seats
Share of departures27.9%73.0%
Load
What plane flies CUN–SEA?
In May 2026, the Airbus A321neo flew 72% of CUN–SEA departures — more than any other aircraft type.
- Airbus A321neo
62 departures · 81.0% load
72.1% - Boeing 737 MAX 9
15 departures · 73.9% load
17.4% - Boeing 737-900ER
8 departures · 74.7% load
9.3% - Boeing 737-800
1 departures · 44.1% load
1.2%
How has CUN–SEA traffic changed?
Nonstop CUN–SEA departures rose from 60 in June 2025 to 86 in May 2026.
Monthly nonstop CUN–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
60 departures · 10,523 passengers
90.4%
Load
July 2025
61 departures · 11,143 passengers
94.2%
Load
August 2025
46 departures · 8,575 passengers
96.1%
Load
September 2025
16 departures · 2,516 passengers
83.3%
Load
October 2025
94 departures · 13,764 passengers
79.6%
Load
November 2025
134 departures · 20,266 passengers
83.0%
Load
December 2025
151 departures · 23,999 passengers
86.6%
Load
January 2026
134 departures · 20,827 passengers
84.0%
Load
February 2026
115 departures · 18,147 passengers
85.0%
Load
March 2026
122 departures · 17,474 passengers
77.3%
Load
April 2026
119 departures · 18,948 passengers
85.7%
Load
May 2026
86 departures · 12,854 passengers
78.9%
Load
By direction
Each direction is filed separately — they rarely match.
CUN → SEA
86.7% full
43 departures · 7,064 passengers
SEA → CUN
71.2% full
43 departures · 5,790 passengers
Nonstop CUN–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Cancún
MX
Cancún International Airport
Coordinates
21.04°N, 86.87°W
Hemisphere
N · W
Frequently asked
How far is Cancún (CUN) from Seattle (SEA)?
CUN to SEA is 2,685 miles (4,320 km / 2,333 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from CUN to SEA?
A nonstop covers the 2,685-mile great-circle distance in roughly 6h 10m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies CUN–SEA?
In May 2026, the Airbus A321neo flew the largest share of departures (72.1%), followed by the Boeing 737 MAX 9 (17.4%).
What mileage do I earn flying CUN–SEA?
Distance-based programs credit off the 2,685-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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