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

Seattle-Tacoma International ⇄ Frederick W Smith Intl/Memphis SEA–MEM

Airlines flew 1,238 flights between Seattle-Tacoma International SEA in Seattle, WA and Frederick W Smith Intl/Memphis MEM in Memphis, TN in the twelve months to July 2026, both directions together: 546 passengers in 761 seats, 72% of them filled, and 110,749,097 pounds of freight. 1,871 miles, about 211 minutes in the air, on 4 airlines: Federal Express Corporation (1,234), Delta Air Lines Inc. (2), Alaska Airlines Inc. (1), Sun Country Airlines d/b/a MN Airlines (1). Planning to fly it yourself? The weather and winds along this route right now.

1,238
flights, twelve months
SEA-MEM: 609 · MEM-SEA: 629
546
passengers
72% of seats filled
1,871
miles
about 211 minutes airborne
4
airlines
8 aircraft types

Flights by month both directions

03059881181/254/257/2510/251/264/261037/26
By month, as a table
flights
1/2595
2/2589
3/2595
4/25103
5/25100
6/2592
7/25105
8/25109
9/2588
10/2599
11/2589
12/25108
1/26103
2/26105
3/26114
4/26118
5/26104
6/2698
7/26103

Passengers by month

0561121682241/254/257/2510/251/264/262247/26
By month, as a table
passengers
1/250
2/250
3/250
4/250
5/250
6/25157
7/250
8/250
9/250
10/250
11/250
12/25156
1/260
2/260
3/26166
4/260
5/260
6/260
7/26224

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
Federal Express Corporation FX1,2340scheduled cargo service
Delta Air Lines Inc. DL239094%scheduled passenger service
Alaska Airlines Inc. AS115697%scheduled passenger service
Sun Country Airlines d/b/a MN Airlines SY100%charter passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Boeing B777-F53300
Boeing 767-300/300ER50900
McDonnell Douglas MD-1114400
Boeing 757-2004000
Airbus Industrie A300-600/R/CF/RCF800
Boeing 737-8002174156
Boeing 757-3001234224
Boeing 737-900ER1180166

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

609 flights of 606 scheduled, 546 passengers in 575 seats, 50,118,172 pounds of freight, 705 pounds of mail. Federal Express Corporation 606; Delta Air Lines Inc. 2; Alaska Airlines Inc. 1.

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

629 flights of 628 scheduled, 0 passengers in 186 seats, 60,630,925 pounds of freight. Federal Express Corporation 628; Sun Country Airlines d/b/a MN Airlines 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: Seattle-Tacoma International SEA and Frederick W Smith Intl/Memphis MEM; all routes.