SEA to LAS flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Harry Reid International Airport · 867 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or LAS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Las Vegas (LAS) arrived on time 78% of the time in Aug 2025 – Jul 2026, in line with the national average.
- 0.8% were cancelled, and 6% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (83% on time); Southwest Airlines was the least (70%).
- Departures scheduled around 7am did best (91% on time); around 5pm did worst (66%).
- Saturday was the most reliable day to fly (83% on time) and Friday the least (74%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (40%).
Which airline is most on time from SEA to LAS?
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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 100% | 0.0% | 0 min | 0.0% | 9 |
| Delta Air Lines | 83% | 1.0% | 10 min | 4.6% | 1,742 |
| Alaska Airlines | 79% | 0.8% | 11 min | 5.5% | 2,622 |
| Southwest Airlines | 70% | 0.5% | 16 min | 6.0% | 976 |
| Frontier Airlines | 68% | 1.2% | 41 min | 12.8% | 260 |
| Spirit Airlines | 67% | 0.0% | 20 min | 8.3% | 12 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am98%58 flights
- 6am92%159 flights
- 7am91%656 flights
- 8am88%279 flights
- 9am87%160 flights
- 10am83%529 flights
- 11am75%280 flights
- 12pm77%582 flights
- 1pm72%216 flights
- 2pm76%287 flights
- 3pm72%388 flights
- 4pm71%387 flights
- 5pm66%374 flights
- 6pm72%404 flights
- 7pm77%199 flights
- 8pm76%479 flights
- 9pm67%178 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday75%0.8% cancelled
- Tuesday82%0.4% cancelled
- Wednesday82%0.3% cancelled
- Thursday75%0.7% cancelled
- Friday74%1.7% cancelled
- Saturday83%0.8% cancelled
- Sunday77%0.9% 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)40%
- Late-arriving aircraft31%
- Air traffic control & airport congestion26%
- Extreme weather2%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)70%
- Extreme weather19%
- Air traffic control & airport congestion11%
- Security0%
SEA to LAS: common questions
- How often are SEA to LAS flights on time?
- 78% 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 Seattle to Las Vegas cancelled?
- 0.8% of scheduled flights were cancelled (47 of 5,621).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 54 min behind schedule on average, and 5.7% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: LAS to SEA — 82% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → LAS, nonstop flights by US airlines that report to the DOT. How we calculate this.