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

Mahlon Sweet Field ⇄ Seattle-Tacoma International EUG–SEA

Airlines flew 5,215 flights between Mahlon Sweet Field EUG in Eugene, OR and Seattle-Tacoma International SEA in Seattle, WA in the twelve months to July 2026, both directions together: 317,941 passengers in 453,202 seats, 70% of them filled, and 133,358 pounds of freight. 234 miles, about 46 minutes in the air, on 5 airlines: SkyWest Airlines Inc. (3,170), Horizon Air (1,378), Alaska Airlines Inc. (658), Sun Country Airlines d/b/a MN Airlines (7) and 1 more. Planning to fly it yourself? The weather and winds along this route right now.

5,215
flights, twelve months
EUG-SEA: 2,609 · SEA-EUG: 2,606
317,941
passengers
70% of seats filled
234
miles
about 46 minutes airborne
5
airlines
8 aircraft types

Flights by month both directions

01242473704941/254/257/2510/251/264/264947/26
By month, as a table
flights
1/25409
2/25367
3/25421
4/25413
5/25464
6/25481
7/25487
8/25494
9/25479
10/25435
11/25380
12/25383
1/26398
2/26370
3/26415
4/26424
5/26465
6/26478
7/26494

Passengers by month

08,89517,79026,68535,5801/254/257/2510/251/264/2627,8587/26
By month, as a table
passengers
1/2524,870
2/2522,506
3/2528,171
4/2526,518
5/2530,472
6/2535,580
7/2534,832
8/2535,253
9/2532,479
10/2527,165
11/2523,231
12/2523,254
1/2622,839
2/2622,200
3/2625,655
4/2623,131
5/2625,642
6/2629,234
7/2627,858

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
SkyWest Airlines Inc. OO3,170167,15871%scheduled passenger service
Horizon Air QX1,37886,26482%scheduled passenger service
Alaska Airlines Inc. AS65864,42257%charter passenger service, scheduled passenger service
Sun Country Airlines d/b/a MN Airlines SY7534%charter passenger service
Delta Air Lines Inc. DL24420%charter passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Embraer ERJ-1754,54875253,422
Boeing 737-900ER24217823,869
Boeing 737-80020316118,995
Boeing B737 Max 90016817816,532
Boeing B737 Max 800421604,131
Boeing 737-9006178574
Boeing 737-700/700LR/Max 74124374
A200-100 BD-500-1A10210944

EUG → SEA this direction alone · flown January 2025 to July 2026

2,609 flights of 2,604 scheduled, 162,338 passengers in 226,747 seats, 43,223 pounds of freight. SkyWest Airlines Inc. 1,586; Horizon Air 689; Alaska Airlines Inc. 329; Sun Country Airlines d/b/a MN Airlines 4; Delta Air Lines Inc. 1.

SEA → EUG this direction alone · flown January 2025 to July 2026

2,606 flights of 2,613 scheduled, 155,603 passengers in 226,455 seats, 90,135 pounds of freight. SkyWest Airlines Inc. 1,584; Horizon Air 689; Alaska Airlines Inc. 329; Sun Country Airlines d/b/a MN Airlines 3; Delta Air Lines Inc. 1.

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: Mahlon Sweet Field EUG and Seattle-Tacoma International SEA; all routes.