Route Reliability
Seattle → Las Vegas
SEA–LAS · 867 miles · Seattle–Tacoma International Airport to Harry Reid International Airport
- 77%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 0.9%
- Cancelled
- 5,703
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines84%1,735 flights
- 2.Alaska Airlines77%2,670 flights
- 3.Southwest Airlines69%977 flights
- 4.Frontier Airlines69%237 flights
Not enough history to rank: Spirit Airlines (84 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning flights do better here.
SEA–LAS flights departing between 3–6 AM arrived on time 95% of the time, versus 61% between 9 PM–12 AM.
Monday is the weak spot.
SEA–LAS flights arrived on time 82% of the time on Saturdays. On Mondays: 74%.
Delta Air Lines has a clear lead on this route.
Delta Air Lines arrived on time 84% of the time on this route; Frontier Airlines managed 69%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon74%(867 flights)
- Tue82%(756 flights)
- Wed80%(740 flights)
- Thu76%(848 flights)
- Fri74%(841 flights)
- Sat82%(717 flights)
- Sun75%(871 flights)
- 3–6 AM95%(60 flights)
- 6–9 AM91%(1086 flights)
- 9 AM–12 PM81%(941 flights)
- 12–3 PM77%(1075 flights)
- 3–6 PM69%(1266 flights)
- 6–9 PM74%(1005 flights)
- 9 PM–12 AM61%(207 flights)
Jun 69% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 69% | 519 |
| July 2025 | 70% | 515 |
| August 2025 | 75% | 487 |
| September 2025 | 77% | 439 |
| October 2025 | 78% | 475 |
| November 2025 | 80% | 438 |
| December 2025 | 74% | 466 |
| January 2026 | 83% | 456 |
| February 2026 | 84% | 414 |
| March 2026 | 77% | 465 |
| April 2026 | 85% | 474 |
| May 2026 | 80% | 492 |
Same trip, other airports
Keep nerding
Based on 5,703 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.