Route Reliability
Las Vegas → Washington
LAS–IAD · 2,065 miles · Harry Reid International Airport to Washington Dulles International Airport
- 87%
- Arrive within 15 minutes
- 6 min early
- Average arrival delay
- 0.5%
- Cancelled
- 1,130
- Flights in the data
Data through May 2026.
Airlines on this route
- United Airlines89% on time · 1,037 flights
- Frontier Airlines74% on time · 93 flights
Too little history on this route to call a winner. We rank airlines only after 100 flights each.
What the data says
The 6–9 AM departure wins.
LAS–IAD flights departing between 6–9 AM arrived on time 92% of the time, versus 82% between 12–3 AM.
Skip Thursday if you can.
LAS–IAD flights arrived on time 94% of the time on Tuesdays. On Thursdays: 83%.
Slipping a little lately.
LAS–IAD flights arrived on time 88% of the time over the last three months in the data, compared with 91% in the three months before that.
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
- Mon88%(162 flights)
- Tue94%(145 flights)
- Wed91%(158 flights)
- Thu83%(165 flights)
- Fri84%(167 flights)
- Sat90%(156 flights)
- Sun83%(167 flights)
- 12–3 AM82%(11 flights)
- 6–9 AM92%(358 flights)
- 12–3 PM84%(357 flights)
- 3–6 PM—(1 flights)
- 9 PM–12 AM87%(393 flights)
Jun 76% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 76% | 111 |
| July 2025 | 80% | 122 |
| August 2025 | 87% | 119 |
| September 2025 | 94% | 90 |
| October 2025 | 95% | 93 |
| November 2025 | 88% | 89 |
| December 2025 | 90% | 92 |
| January 2026 | 90% | 87 |
| February 2026 | 95% | 73 |
| March 2026 | 85% | 79 |
| April 2026 | 91% | 80 |
| May 2026 | 87% | 85 |
Same trip, other airports
Keep nerding
Based on 1,130 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.