Route on-time record
BOI to LAS: most on-time flights and the best time to fly
Boise (Boise Air Terminal/Gowen Field) to Las Vegas (Harry Reid International Airport). 1,431 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was Southwest 1585 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BOI → LAS
Boise to Las Vegas: 1,431 nonstop flights a year
On time (12 months)
82%
Cancelled
0.2%
avg delay 12 min
Best time to leave
Before 9 AM
97% on time vs 68% 6 to 9 PM
Most reliable airline
Alaska
86% 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 · Southwest 1585
6:00 AM → 6:45 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1760; its record covers all of them.
95%
chance on time
- On time (history)
- 96%
- Cancelled
- 1.3%
- Avg arrival delay
- 4 min
- Arrived on time 96% of the time (74 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 68%).
Moderate track record · 74 flights
Find Southwest 1585 fares Opens this date on Aviasales#2 · Alaska 229
7:20 AM → 8:25 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-21.
91%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 94% of the time (35 flights, Jun 2025 to May 2026).
- Never cancelled in 35 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 68%).
- Short track record (35 flights), so its score leans on the airline's record at this hour.
Limited track record · 35 flights
Find Alaska 229 fares Opens this date on Aviasales#3 · Southwest 1289
5:40 AM → 6:30 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-01.
91%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 68%).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1289 fares Opens this date on Aviasales#4 · SkyWest 3311 · sold as United Express, Delta Connection, American Eagle or Alaska
8:25 AM → 9:32 AM2h 07m nonstop
Local times, typical schedule. Last flown 2026-03-17.
89%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 93% of the time (30 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 68%).
- Short track record (30 flights), so its score leans on the airline's record at this hour.
Limited track record · 30 flights
Find 8:25 AM flight fares Opens this date on Aviasales#5 · SkyWest 3391 · sold as United Express, Delta Connection, American Eagle or Alaska
2:38 PM → 3:37 PM1h 59m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 80% of the time (97 flights, Jun 2025 to May 2026).
- Never cancelled in 97 scheduled flights.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 97 flights
Find 2:38 PM flight fares Opens this date on Aviasales#6 · SkyWest 3446 · sold as United Express, Delta Connection, American Eagle or Alaska
2:22 PM → 3:20 PM1h 58m nonstop
Local times, typical schedule. Last flown 2026-05-12.
79%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 78% of the time (110 flights, Jun 2025 to May 2026).
- Never cancelled in 110 scheduled flights.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 110 flights
Find 2:22 PM flight fares Opens this date on Aviasales#7 · Southwest 1488
7:10 PM → 8:00 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-05.
79%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 85% of the time (13 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 68% on time; Before 9 AM: 97%).
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 1488 fares Opens this date on Aviasales#8 · Southwest 860
1:00 PM → 1:50 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
- 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 (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 860 fares Opens this date on Aviasales#9 · Southwest 2152
2:00 PM → 2:50 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-30.
77%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 19 min
- Arrived on time 71% of the time (24 flights, Jun 2025 to May 2026).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 2152 fares Opens this date on Aviasales#10 · Southwest 854
5:40 PM → 6:25 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
- On time (history)
- 65%
- Cancelled
- 0.0%
- Avg arrival delay
- 19 min
- Arrived on time 65% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find Southwest 854 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Alaska Airlines86%
71 flights · 92% on time as flown · 0.1% cancel
- Southwest Airlines82%
1,050 flights · 82% on time as flown · 0.3% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)82%
240 flights · 81% on time as flown · 0.1% cancel
- Spirit Airlines77%
56 flights · 70% on time as flown · 0.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM97%
457 flights · avg delay 3 min
- 9 AM to noon81%
158 flights · avg delay 9 min
- Noon to 3 PM76%
273 flights · avg delay 14 min
- 3 to 6 PM79%
220 flights · avg delay 13 min
- 6 to 9 PM68%
300 flights · avg delay 20 min
Best day: Saturday (87%). Worst: Friday (76%).
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
- Late-arriving aircraft51%
- Air traffic control and airport volume27%
- Airline (crew, maintenance, boarding)18%
- Severe weather5%
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
BOI to LAS questions
- What time of day is best to fly BOI to LAS?
- Before 9 AM: 97% of flights arrived on time, against 68% for departures 6 to 9 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 BOI to LAS?
- Alaska, with a season-adjusted 86% chance of operating and arriving on time over 71 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 BOI to LAS?
- September (77% on time); the best was November (85%), 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 BOI
- LAS to BOI (return)
- BOI to SEA 86%
- BOI to DEN 81%
- BOI to PHX 84%
- BOI to SLC 92%
- BOI to SFO 75%
- BOI to LAX 93%
- BOI to PDX 91%
- BOI to ORD 76%
- BOI to SAN 83%
- BOI to SMF 84%
- BOI to DFW 82%
- BOI to MSP 88%
Live status: FAA delays and ground stops