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Route on-time record

GEG to LAS: most on-time flights and the best time to fly

Spokane (Spokane International Airport) to Las Vegas (Harry Reid International Airport). 856 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was Southwest 2040 at 5:10 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

GEG → LAS

Spokane to Las Vegas: 856 nonstop flights a year

On time (12 months)

85%

Cancelled

0.4%

avg delay 9 min

Best time to leave

Before 9 AM

97% on time vs 63% after 9 PM

Most reliable airline

Southwest

87% chance on time

Check GEG to LAS fares

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. #1 · Southwest 2040

    5:10 AM → 7:30 AM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    96%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (24 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; After 9 PM: 63%).
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find Southwest 2040 fares Opens this date on Aviasales

  2. #2 · Southwest 159

    6:50 AM → 9:10 AM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    94%

    chance on time

    On time (history)
    97%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 97% of the time (31 flights, Jun 2025 to May 2026).
    • Never cancelled in 31 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; After 9 PM: 63%).
    • Short track record (31 flights), so its score leans on the airline's record at this hour.

    Limited track record · 31 flights

    Find Southwest 159 fares Opens this date on Aviasales

  3. #3 · Southwest 3827

    5:55 AM → 8:25 AM2h 30m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    92%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 91% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; After 9 PM: 63%).
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 3827 fares Opens this date on Aviasales

  4. #4 · Southwest 365

    1:45 PM → 4:05 PM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    89%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 365 fares Opens this date on Aviasales

  5. #5 · Southwest 3426

    10:45 AM → 1:00 PM2h 15m nonstop

    Local times, typical schedule. Last flown 2026-04-05.

    88%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 90% of the time (10 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 (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find Southwest 3426 fares Opens this date on Aviasales

  6. #6 · Southwest 2936

    5:50 PM → 9:10 PM2h 18m nonstop

    Local times, typical schedule. Last flown 2026-04-05.

    87%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (10 flights, Jun 2025 to May 2026).
    • Short track record (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find Southwest 2936 fares Opens this date on Aviasales

  7. #7 · Southwest 4626

    2:40 PM → 5:00 PM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-27.

    83%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 81% of the time (16 flights, Jun 2025 to May 2026).
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 4626 fares Opens this date on Aviasales

  8. #8 · Southwest 2227

    1:30 PM → 3:50 PM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    83%

    chance on time

    On time (history)
    74%
    Cancelled
    0.0%
    Avg arrival delay
    17 min
    • Arrived on time 74% of the time (23 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 (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Southwest 2227 fares Opens this date on Aviasales

  9. #9 · Southwest 2261

    3:25 PM → 5:45 PM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-04-01.

    79%

    chance on time

    On time (history)
    63%
    Cancelled
    0.0%
    Avg arrival delay
    58 min
    • Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 2261 fares Opens this date on Aviasales

  10. #10 · Southwest 2031

    12:25 PM → 2:40 PM2h 15m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    77%

    chance on time

    On time (history)
    60%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 60% of the time (15 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 (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 2031 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines87%

    750 flights · 87% on time as flown · 0.3% cancel

  • Allegiant Air72%

    106 flights · 66% on time as flown · 0.6% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM97%

    340 flights · avg delay 2 min

  • 9 AM to noon89%

    87 flights · avg delay 8 min

  • Noon to 3 PM79%

    211 flights · avg delay 10 min

  • 3 to 6 PM71%

    142 flights · avg delay 19 min

  • After 9 PM63%

    54 flights · avg delay 25 min

Best day: Wednesday (92%). Worst: Thursday (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.

J
86
F
83
M
87
A
85
M
86
J
83
J
77
A
81
S
86
O
83
N
90
D
81

What delays this route

  • Late-arriving aircraft42%
  • Airline (crew, maintenance, boarding)33%
  • Air traffic control and airport volume22%
  • Severe weather3%

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

GEG to LAS questions

What time of day is best to fly GEG to LAS?
Before 9 AM: 97% of flights arrived on time, against 63% for departures after 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 GEG to LAS?
Southwest, with a season-adjusted 87% chance of operating and arriving on time over 750 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 GEG to LAS?
July (77% on time); the best was November (90%), 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 GEG

Live status: FAA delays and ground stops