LAS to SEA flight delays & on-time performance
Nonstop flights from Harry Reid International Airport to Seattle–Tacoma International Airport · 867 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at LAS or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Las Vegas (LAS) to Seattle (SEA) arrived on time 82% 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.
- Delta Air Lines was the most punctual airline here (88% on time); Southwest Airlines was the least (72%).
- Departures scheduled around 6am did best (96% on time); around 4pm did worst (72%).
- Tuesday was the most reliable day to fly (87% on time) and Friday the least (76%).
- The largest source of delay minutes was late-arriving aircraft (46%).
Which airline is most on time from LAS 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 |
|---|---|---|---|---|---|
| Delta Air Lines | 88% | 1.0% | 12 min | 4.6% | 1,742 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 86% | 0.0% | 9 min | 0.0% | 7 |
| Alaska Airlines | 83% | 1.1% | 12 min | 4.3% | 2,621 |
| Frontier Airlines | 82% | 1.2% | 10 min | 4.3% | 260 |
| Spirit Airlines | 75% | 0.0% | 16 min | 8.3% | 12 |
| Southwest Airlines | 72% | 0.2% | 14 min | 5.8% | 977 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am96%615 flights
- 7am84%491 flights
- 8am82%254 flights
- 9am89%220 flights
- 10am86%468 flights
- 11am90%567 flights
- 12pm84%254 flights
- 1pm85%432 flights
- 2pm76%374 flights
- 3pm76%320 flights
- 4pm72%196 flights
- 5pm79%418 flights
- 6pm77%176 flights
- 7pm74%391 flights
- 8pm79%100 flights
- 9pm72%224 flights
- 10pm57%113 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday82%0.6% cancelled
- Tuesday87%0.4% cancelled
- Wednesday87%0.8% cancelled
- Thursday80%0.6% cancelled
- Friday76%1.9% cancelled
- Saturday87%1.4% cancelled
- Sunday80%0.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft46%
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion13%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)73%
- Extreme weather19%
- Air traffic control & airport congestion8%
- Security0%
LAS to SEA: common questions
- How often are LAS to SEA flights on time?
- 82% 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 Las Vegas to Seattle cancelled?
- 0.9% of scheduled flights were cancelled (52 of 5,619).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 64 min behind schedule on average, and 4.7% of flights were an hour or more late.
- How long is taxi time at LAS?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to LAS — 78% on time
More flights from Las Vegas
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: LAS → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.