The U.S. aircraft register, updated daily
Routes and flights · the DOT's airline reports, August 2025 to July 2026

Seattle-Tacoma International ⇄ Cancun SEA–CUN

Airlines flew 1,019 flights between Seattle-Tacoma International SEA in Seattle, WA and Cancun, Mexico CUN in Cancun, MX in the twelve months to July 2026, both directions together: 157,665 passengers in 188,869 seats, 83% of them filled, and 12,161 pounds of freight. 2,685 miles, about 313 minutes in the air, on 2 airlines: Delta Air Lines Inc. (522), Alaska Airlines Inc. (497).

1,019
flights, twelve months
SEA-CUN: 512 · CUN-SEA: 507
157,665
passengers
83% of seats filled
2,685
miles
about 313 minutes airborne
2
airlines
5 aircraft types

Flights by month both directions

041821231641/254/257/2510/251/264/2626/26
By month, as a table
flights
1/25133
2/25116
3/25151
4/25164
5/2590
6/2560
7/2561
8/2546
9/2516
10/2594
11/25134
12/25151
1/26134
2/26115
3/26122
4/26119
5/2686
6/262

Passengers by month

06,27812,55618,83525,1131/254/257/2510/251/264/262956/26
By month, as a table
passengers
1/2520,564
2/2518,724
3/2524,166
4/2525,113
5/2514,836
6/2510,523
7/2511,143
8/258,575
9/252,516
10/2513,764
11/2520,266
12/2523,999
1/2620,827
2/2618,147
3/2617,474
4/2618,948
5/2612,854
6/26295

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
Delta Air Lines Inc. DL52284,21983%scheduled passenger service
Alaska Airlines Inc. AS49773,44684%scheduled passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Airbus Industrie A321-200n51119482,560
Boeing B737 Max 90033017849,793
Boeing 737-900ER14017820,443
Boeing 737-800261593,473
Boeing B737 Max 800121601,396

SEA → CUN this direction alone · flown January 2025 to June 2026

512 flights of 512 scheduled, 77,955 passengers in 94,831 seats, 9,689 pounds of freight. Delta Air Lines Inc. 263; Alaska Airlines Inc. 249.

CUN → SEA this direction alone · flown January 2025 to June 2026

507 flights of 511 scheduled, 79,710 passengers in 94,038 seats, 2,472 pounds of freight. Delta Air Lines Inc. 259; Alaska Airlines Inc. 248.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Seattle-Tacoma International SEA and Cancun, Mexico CUN; all routes.