Route on-time record
GRR to LAS: most on-time flights and the best time to fly
Grand Rapids (Gerald R. Ford International Airport) to Las Vegas (Harry Reid International Airport). 438 nonstop flights in Jun 2025 to May 2026, 71% arrived within 15 minutes and 0.0% were cancelled. The most reliable flight number was Allegiant 549 at 1:59 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
GRR → LAS
Grand Rapids to Las Vegas: 438 nonstop flights a year
On time (12 months)
71%
Cancelled
0.0%
avg delay 23 min
Best time to leave
Before 9 AM
78% on time vs 68% noon to 3 PM
Most reliable airline
Southwest
73% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Allegiant 549
1:59 PM → 3:20 PM4h 21m nonstop
Local times, typical schedule. Last flown 2026-05-17.
75%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 84% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 68% on time; Before 9 AM: 78%).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find Allegiant 549 fares Opens this date on Aviasales#2 · Allegiant 88
2:37 PM → 3:58 PM4h 21m nonstop
Local times, typical schedule. Last flown 2026-05-18.
67%
chance on time
- On time (history)
- 72%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 72% of the time (18 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 68% on time; Before 9 AM: 78%).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find Allegiant 88 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines73%
219 flights · 73% on time as flown · 0.0% cancel
- Allegiant Air70%
219 flights · 69% on time as flown · 0.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM78%
58 flights · avg delay 21 min
- Noon to 3 PM68%
200 flights · avg delay 16 min
- 3 to 6 PM72%
142 flights · avg delay 18 min
- After 9 PM73%
30 flights · avg delay 98 min
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)49%
- Late-arriving aircraft33%
- Air traffic control and airport volume15%
- Severe weather2%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
GRR to LAS questions
- What time of day is best to fly GRR to LAS?
- Before 9 AM: 78% of flights arrived on time, against 68% for departures noon to 3 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from GRR to LAS?
- Southwest, with a season-adjusted 73% chance of operating and arriving on time over 219 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on GRR to LAS?
- July (64% on time); the best was April (91%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from GRR
- LAS to GRR (return)
- GRR to ORD 68%
- GRR to DTW 77%
- GRR to ATL 86%
- GRR to DEN 80%
- GRR to MSP 81%
- GRR to DFW 67%
- GRR to CLT 80%
- GRR to LGA 79%
- GRR to MDW 78%
- GRR to EWR 79%
- GRR to DCA 69%
- GRR to BWI 81%
Live status: FAA delays and ground stops