LAX to SEA flight delays & on-time performance
Nonstop flights from Los Angeles International Airport to Seattle–Tacoma International Airport · 954 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at LAX or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Los Angeles (LAX) to Seattle (SEA) arrived on time 85% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.9% were cancelled, and 5% arrived an hour or more late.
- United Airlines was the most punctual airline here (87% on time); SkyWest Airlines was the least (84%).
- Departures scheduled around 7am did best (91% on time); around 6pm did worst (78%).
- Tuesday was the most reliable day to fly (88% on time) and Friday the least (81%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (50%).
Which airline is most on time from LAX to SEA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 87% | 0.3% | 6 min | 2.8% | 394 |
| Delta Air Lines | 86% | 0.7% | 11 min | 5.2% | 2,225 |
| Alaska Airlines | 85% | 0.9% | 8 min | 3.6% | 3,287 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 84% | 0.7% | 14 min | 6.4% | 1,234 |
| Frontier Airlines | 82% | 3.4% | 15 min | 6.0% | 295 |
| American Airlines | 73% | 0.0% | 40 min | 26.7% | 15 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am91%219 flights
- 7am91%640 flights
- 8am89%432 flights
- 9am90%583 flights
- 10am87%326 flights
- 11am86%579 flights
- 12pm80%345 flights
- 1pm86%317 flights
- 2pm85%531 flights
- 3pm83%601 flights
- 4pm85%327 flights
- 5pm87%634 flights
- 6pm78%443 flights
- 7pm80%858 flights
- 8pm88%379 flights
- 9pm85%235 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday87%1.3% cancelled
- Tuesday88%0.1% cancelled
- Wednesday87%0.5% cancelled
- Thursday83%0.6% cancelled
- Friday81%1.6% cancelled
- Saturday87%0.6% cancelled
- Sunday84%1.3% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)50%
- Late-arriving aircraft36%
- Air traffic control & airport congestion13%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)65%
- Extreme weather30%
- Air traffic control & airport congestion5%
- Security0%
LAX to SEA: common questions
- How often are LAX to SEA flights on time?
- 85% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Los Angeles to Seattle cancelled?
- 0.9% of scheduled flights were cancelled (66 of 7,450).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 63 min behind schedule on average, and 4.6% of flights were an hour or more late.
- How long is taxi time at LAX?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to LAX — 83% on time
More flights from Los Angeles
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: LAX → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.