Route on-time record
GEG to DEN: most on-time flights and the best time to fly
Spokane (Spokane International Airport) to Denver (Denver International Airport). 2,062 nonstop flights in Jun 2025 to May 2026, 83% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was United 1234 at 5:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
GEG → DEN
Spokane to Denver: 2,062 nonstop flights a year
On time (12 months)
83%
Cancelled
0.2%
avg delay 13 min
Best time to leave
Before 9 AM
96% on time vs 74% 6 to 9 PM
Most reliable airline
United
84% 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 · United 1234
5:00 AM → 8:28 AM2h 23m nonstop
Local times, typical schedule. Last flown 2026-05-31.
95%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 95% of the time (243 flights, Jun 2025 to May 2026).
- Never cancelled in 244 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 6 to 9 PM: 74%).
Strong track record · 243 flights
Find United 1234 fares Opens this date on Aviasales#2 · Southwest 1802
10:45 AM → 2:00 PM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 100% of the time (15 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 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 1802 fares Opens this date on Aviasales#3 · SkyWest 5896 · sold as United Express, Delta Connection, American Eagle or Alaska
4:01 PM → 7:35 PM2h 34m nonstop
Local times, typical schedule. Last flown 2026-05-20.
85%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 91% of the time (53 flights, Jun 2025 to May 2026).
- Never cancelled in 53 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (53 flights), so its score leans on the airline's record at this hour.
Limited track record · 53 flights
Find 4:01 PM flight fares Opens this date on Aviasales#4 · Southwest 2483
6:15 AM → 9:30 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1586; its record covers all of them.
83%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 81% of the time (86 flights, Jun 2025 to May 2026).
- Never cancelled in 87 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 6 to 9 PM: 74%).
Moderate track record · 86 flights
Find Southwest 2483 fares Opens this date on Aviasales#5 · United 1005
6:37 PM → 9:54 PM2h 17m nonstop
Local times, typical schedule. Last flown 2026-03-27.
80%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 79% of the time (14 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 74% on time; Before 9 AM: 96%).
- 99% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find United 1005 fares Opens this date on Aviasales#6 · United 2786
4:08 PM → 7:33 PM2h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 2786 fares Opens this date on Aviasales#7 · Frontier 3358
12:33 PM → 3:59 PM2h 23m nonstop
Local times, typical schedule. Last flown 2026-05-29.
76%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 74% of the time (121 flights, Jun 2025 to May 2026).
- Never cancelled in 121 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 121 flights
Find Frontier 3358 fares Opens this date on Aviasales#8 · United 1255
1:41 PM → 5:05 PM2h 19m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 76%
- Cancelled
- 0.0%
- Avg arrival delay
- 19 min
- Arrived on time 76% of the time (361 flights, Jun 2025 to May 2026).
- Never cancelled in 364 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 361 flights
Find United 1255 fares Opens this date on Aviasales#9 · Southwest 3118
2:30 PM → 5:50 PM2h 20m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 86% of the time (7 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (7 flights), so its score leans on the airline's record at this hour.
Limited track record · 7 flights
Find Southwest 3118 fares Opens this date on Aviasales#10 · Southwest 1702
2:50 PM → 6:10 PM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Southwest 1969; its record covers all of them.
72%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 74% of the time (80 flights, Jun 2025 to May 2026).
- Never cancelled in 80 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 80 flights
Find Southwest 1702 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines84%
833 flights · 84% on time as flown · 0.3% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)84%
250 flights · 87% on time as flown · 0.6% cancel
- Southwest Airlines83%
858 flights · 83% on time as flown · 0.0% cancel
- Frontier Airlines78%
121 flights · 74% on time as flown · 0.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
724 flights · avg delay 5 min
- 9 AM to noon82%
208 flights · avg delay 11 min
- Noon to 3 PM75%
653 flights · avg delay 17 min
- 3 to 6 PM77%
384 flights · avg delay 19 min
- 6 to 9 PM74%
91 flights · avg delay 29 min
Best day: Saturday (86%). Worst: Thursday (81%).
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
- Air traffic control and airport volume37%
- Late-arriving aircraft31%
- Airline (crew, maintenance, boarding)25%
- Severe weather6%
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 DEN questions
- What time of day is best to fly GEG to DEN?
- Before 9 AM: 96% of flights arrived on time, against 74% 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 GEG to DEN?
- United, with a season-adjusted 84% chance of operating and arriving on time over 833 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 DEN?
- June (74% on time); the best was November (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 GEG
- DEN to GEG (return)
- GEG to SEA 85%
- GEG to SLC 91%
- GEG to PHX 85%
- GEG to PDX 88%
- GEG to LAS 85%
- GEG to SFO 77%
- GEG to LAX 91%
- GEG to MSP 91%
- GEG to ORD 67%
- GEG to SMF 87%
- GEG to DFW 79%
- GEG to ATL 86%
Live status: FAA delays and ground stops