Seattle-Tacoma International Airport (SEA) is preparing for a record-breaking Labor Day holiday weekend after a summer that set multiple passenger traffic records. Airport officials estimate more than one million travelers will pass through from August 28 to September 2, representing a 7% increase from the same period last year. The projected peak day is Friday, August 29, with 197,000 overall passengers.
SEA has already recorded its busiest summer in history, with eight of the 10 largest passenger volume days ever taking place since June. The airport broke its single-day outbound record three times in 2025 — on June 22, July 27, and August 10 — when 78,763 passengers cleared Transportation Security Administration (TSA) checkpoints and an estimated 207,000 travelers used the facility overall.
Passenger Growth and Record Numbers
Airport data shows each of the 10 busiest days for international arrivals occurred this summer. The International Arrivals Facility set a new record on July 26 with 11,281 passengers processed through U.S. Customs in a single day. Officials attribute the growth to continued increases in both domestic and international demand.
Key holiday weekend projections include:
| Date | Estimated Total Passengers |
|---|---|
| Thursday, August 28 | 189,000 |
| Friday, August 29 | 197,000 |
| Monday, September 1 | 191,000 |
Security Enhancements
The airport’s new Checkpoint 1 opened in June at the south end of baggage claim, providing access to general screening, TSA PreCheck, and CLEAR+. According to SEA, 99% of travelers have cleared TSA checkpoints in under 30 minutes this year, with 93% passing through in under 20 minutes. This is an improvement compared to 94% under 30 minutes in 2024 and 80% in 2023.
Additional capacity upgrades include two new lanes at Checkpoints 3 and 4 completed last year, and the redesigned Checkpoint 6, which is expected to reopen before Thanksgiving with six lanes. Airport officials advise travelers to consult updated checkpoint maps to find the best access to security options, including SEA Spot Saver and SEA Visitor Pass.
Construction and Access Challenges
Ongoing expressway construction has altered access routes but has not reduced the number of available lanes. Recent work has added lanes to the upper Departures drive while current construction focuses on the center section of the project, separating upper and lower access points. The next phase will raise the lower Arrivals Drive, with completion targeted for spring 2026.
Officials encourage travelers to consider alternatives to driving, such as Link Light Rail, transit, rideshare, taxis, shuttle services, and reserved parking. Those using general parking are advised to allow 30–45 minutes to locate spaces.
Expanded Check-In and Dining Options
New check-in and baggage drop areas are available at the north end of the Alaska Airlines Ticketing Level, part of the SEA Gateway Project. Bridge Level check-in facilities along skybridges from the parking garage were also introduced recently. However, Checkpoint 6 remains closed until later this year for upgrades.
SEA has also opened several new dining and retail options. Pre-security additions include Kawaii Treats at the south end of baggage claim and Neighborhood Cafe near Checkpoint 5. Post-security openings include Lowrider Cookie, Wunderground Coffee, and Theo Chocolate near Gate A1; Skillet near Gate C10; and Seattle Beer Union near Gate A10.
Travel Guidance for Passengers
Airport officials advise travelers to plan ahead to avoid congestion during peak hours, which occur before 9 a.m., between 2 p.m. and 5 p.m., and between 9 p.m. and 11 p.m. Passengers are encouraged to arrive at least two hours before domestic flights and three hours before international flights.
SEA recommends travelers use SEA Spot Saver to secure a checkpoint time, check in online, and head directly to security if not checking baggage. Real-time support is available through SEA’s Customer Care Connect, with staff on-site daily from 7 a.m. to 9 p.m. at information desks located near Checkpoint 4 and Gate A6.
Travelers should also ensure they have Real ID-compliant documents. The REAL ID Act requires compliant identification for all domestic air travel, and non-compliant documents may result in delays at checkpoints.
Officials remind drivers to consider using the airport parking garage instead of the congested terminal drives. When picking up arriving passengers, travelers can meet inside the terminal by entering from the International Boulevard entrance and exiting through the garage, bypassing terminal drive congestion entirely.
Key Tips
- Arrive early — two hours before domestic flights, three hours before international flights.
- Use SEA Spot Saver to minimize checkpoint wait times.
- Take public transit or rideshare to avoid roadway delays.
- Consider reserved parking for guaranteed availability.
- Ensure travel documents comply with REAL ID requirements.
Seattle-Tacoma International Airport projects this Labor Day will be among its busiest holiday travel periods on record, capping a summer that has already reshaped passenger traffic milestones. With expanded facilities, new services, and continued construction, officials emphasize that preparation remains the key to navigating record passenger volumes.
