Carrier route record
F9LAS→IAD
Frontier Airlines · Las Vegas to Washington
- Flights
- 103
- Period
- September 2025 to August 2026
- Share of route
- 10%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on LAS to IAD draws a D+. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is roughly 50 minutes behind schedule. Build slack into anything you connect to. That rests on 103 flights, with a median arrival 11 minutes late.
The national on-time rate over the same period is 77.3%, so Frontier on LAS to IAD runs 18 points behind the country as a whole. Across a thousand flights that is about 175 extra late arrivals.
Key figures
On time
59.8%
Arrivals under 15 minutes late, of 102 completed flights
Avg delay
52 min
Across delayed arrivals only, not all flights
Cancelled
0.97%
National rate is 1.89%
Whole route
85.5%
Every carrier on LAS to IAD, 1,070 flights
These figures cover 103 flights between September 2025 and August 2026. Beyond the headline rate, 9.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Frontier against every carrier on LAS to IAD
Frontier flew 103 of the 1,070 flights on LAS to IAD, about 10% of it. Its 59.8% on time is 26 points worse than the route as a whole, which runs 85.5%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from United at 88.2% to Frontier at 59.8%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 967 | 88.2% | 63 min | 0.62% | A+ |
| Frontier Airlines (this page)thin sample | 103 | 59.8% | 52 min | 0.97% | D+ |
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Departure window
When Frontier runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 103 flights.
There are not enough flights in each departure window to split Frontier's LAS to IAD record by time of day without the percentages moving on noise. The headline rate of 59.8% is the reliable figure here.
Across the year
Frontier on LAS to IAD through the year
- Apr–Jun 202641 flights65.9%
- Jul–Sep 202662 flights55.7%
Scale runs 45% to 70%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 59.8% on time across 103 flights.
Split by quarter, Frontier on LAS to IAD logged 41 flights in Apr–Jun 2026 and 62 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 59.8% annual figure is the one to use.
Arrival by arrival
How late Frontier on LAS to IAD runs when it is late
The 41 late arrivals split 11 under half an hour, 20 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early14 flights13.7%
- Within 15 min47 flights46.1%
- 15–29 min late11 flights10.8%
- 30–59 min late20 flights19.6%
- 1–2 hours late8 flights7.8%
- 2+ hours late2 flights2.0%
Scale runs 0% to 100%.
Share of 102 completed flights by arrival against schedule.
A late pushback is often recovered here: of 50 departures that left 15 minutes late or more, 16 still arrived on time. In the other direction, 7 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at IAD.
The worst days
Worst days for Frontier on LAS to IAD
The latest arrival of the period was on 19 June 2026, 5 hours 15 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Four of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 June 2026 | 5 hours 15 minutes | Carrier |
| 13 July 2026 | 2 hours 2 minutes | Late-arriving aircraft |
| 2 July 2026 | 1 hour 43 minutes | Carrier |
| 18 July 2026 | 1 hour 29 minutes | Late-arriving aircraft |
| 17 July 2026 | 1 hour 27 minutes | Late-arriving aircraft |
Delay causes
Why Frontier runs late on this route
Carrier accounts for 51% of the 2,120 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Carrier
- 38%Late-arriving aircraft
- 11%National Airspace System
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,120 reported delay minutes here, that single category outweighs weather by 38 to one. The split is drawn from 2,120 reported delay minutes.
The largest share of delay minutes, 51%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,089 of the 2,120 delay minutes reported here.
Cancellations sit at 0.97% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
9.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,065 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 60.2% on time across 104 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 103 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Frontier on LAS to IAD
Put together: treat all of this as provisional. 103 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 59.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 102 completed flights over 12 months sit behind that.
Related
Where to go next
- LAS to IAD, every carrier
- Frontier on IAD to LAS, the return leg
- United Airlines on LAS to IAD88.2%
- Frontier Airlines network-wide record
- Harry Reid International (LAS) delay statistics
- Washington Dulles International (IAD) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.