1 · The flights
25.5 million people flew into SEA
Airlines brought 31.0 million seats, and 82% of them were filled — +1.3% seats and −0.2% passengers against the year before.
Latest: 2.65 million arrivals in August 2026, −2.7% on a year ago — the third month in a row below last year.
Source: U.S. DOT T-100, all flights arriving at SEA, including connecting travelers. Latest arrivals: Port of Seattle.
2 · The renters
1.3 million rentals were opened at SEA counters
Up 0.5% on the year before — about 1 in 19 arriving passengers rented a car. The average rental brought the company about $312 before taxes.
Rentals opened at the counter each month · label above each bar is that month's count
Source: Each company’s gross revenue and transaction counts as reported to the airport, before taxes and some fees.
3 · The market
$312 average rental, −2.2% on the year
The average rental brought $311.53, down from $318.67 a year earlier, even as the number of rentals rose 0.5%.
Source: Each company’s gross revenue and transaction counts as reported to the airport, before taxes and some fees.
4 · The brands
Avis takes about 1 in every 6 dollars
The three biggest brands share 45% of the market. Avis gained the most ground over the year (+1.3 pts); Thrifty (DTG) lost the most (−2.4 pts).
Plus 2 smaller brands splitting the remaining 1%.
Source: Each company’s gross revenue and transaction counts as reported to the airport, before taxes and some fees.