Market · U.S. Airport Market Profile

Seattle (SEA)

U.S. flights only 12 months ending April 2026 BTS source data through April 2026
Arriving passengers
21.95M
▼ 1.89% year over year · Rank No. 10
Departing passengers
21.93M
▼ 1.81% year over year · Rank No. 10
Passengers daily each way
60,104
Average passengers per direction per day
Scheduled departures
188,191
▼ 0.62% year over year · Rank No. 8 · 516 daily
Freight and mail
673M lb.
▼ 2.95% year over year · Rank No. 21
Scheduled carriers
19
▲ 11.76% year over year

Airline Market Share

Total passengers · 43.88 million

April 2026
Alaska48.65%
21.34 million passengers
Delta19.58%
8.59 million passengers
Other13.04%
5.72 million passengers
SkyWest7.67%
3.36 million passengers
United5.75%
2.52 million passengers
Horizon Air5.31%
2.33 million passengers

Busiest U.S. Destinations

Passengers in thousands, compared with the prior 12-month period

Top 10
1
PHXPhoenix, AZ
922.78k1,264 PDEW
▼ 1.8%
2
DENDenver, CO
910.57k1,247 PDEW
▼ 3.1%
3
LAXLos Angeles, CA
889.47k1,218 PDEW
▼ 9.9%
4
ANCAnchorage, AK
872.93k1,196 PDEW
▼ 12.1%
5
ORDChicago, IL
813.99k1,115 PDEW
▲ 8.3%
6
LASLas Vegas, NV
812.19k1,113 PDEW
▼ 12.6%
7
SFOSan Francisco, CA
808.42k1,107 PDEW
▲ 3.5%
8
DFWDallas/Fort Worth, TX
791.92k1,085 PDEW
▼ 3.9%
9
SANSan Diego, CA
599.84k822 PDEW
▼ 2.4%
10
SLCSalt Lake City, UT
548.82k752 PDEW
▲ 3.5%
Total passengers43.88 million
Largest carrierAlaska · 48.6%
Largest U.S. destinationPhoenix (PHX)
Average departures516 per day

Passenger History

Rolling 12-month arriving and departing passengers

Growing monthly

Operations and Cargo History

Scheduled departures and freight/mail volume

BTS

Flightline Insight

SEA handled 43.88 million arriving and departing passengers during the latest 12-month reporting period, down 1.9% year over year. Alaska was the largest scheduled carrier with 48.6% of reported passengers. The busiest reported U.S. destinations were Phoenix (PHX), Denver (DEN) and Los Angeles (LAX).

Data note: Passenger totals represent scheduled enplaned revenue passengers on U.S. flights. PDEW is calculated as total arriving and departing passengers divided by two directions and 365 days. Carrier shares are based on BTS-reported scheduled enplaned revenue passengers. Freight and mail include scheduled and nonscheduled activity. Destination figures are BTS-reported passenger totals in thousands; route PDEW is calculated from the latest rolling 12-month passenger total. Historical charts retain each monthly BTS endpoint as future updates are generated.