Route on-time record

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

Phoenix (Phoenix Sky Harbor International Airport) to Spokane (Spokane International Airport). 1,217 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was Southwest 4639 at 8:30 AM.

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

PHX → GEG

Phoenix to Spokane: 1,217 nonstop flights a year

On time (12 months)

77%

Cancelled

0.2%

avg delay 15 min

Best time to leave

Before 9 AM

90% on time vs 68% 6 to 9 PM

Most reliable airline

American

77% chance on time

Check PHX to GEG 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 · Southwest 4639
8:30 AM → 11:20 AM2h 53m nonstop
Local times, typical schedule. Last flown 2026-04-05.
82%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 90% of the time (10 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 68%).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find Southwest 4639 fares Opens this date on Aviasales
#2 · American 2117
11:35 AM → 2:19 PM2h 44m nonstop
Local times, typical schedule. Last flown 2026-05-20.
81%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 84% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (44 flights), so its score leans on the airline's record at this hour.
Limited track record · 44 flights
Find American 2117 fares Opens this date on Aviasales
#3 · Southwest 2824
9:00 AM → 11:45 AM2h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
79%
chance on time
On time (history)
67%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 67% of the time (15 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 2824 fares Opens this date on Aviasales
#4 · American 1785
8:30 PM → 11:09 PM2h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 339, 2381; its record covers all of them.
78%
chance on time
On time (history)
78%
Cancelled
0.0%
Avg arrival delay
18 min
- Arrived on time 78% of the time (157 flights, Jun 2025 to May 2026).
- Never cancelled in 157 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 68% on time; Before 9 AM: 90%).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
Moderate track record · 157 flights
Find American 1785 fares Opens this date on Aviasales
#5 · Southwest 1482
9:30 PM → 12:10 AM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-05.
77%
chance on time
On time (history)
69%
Cancelled
0.0%
Avg arrival delay
16 min
- Arrived on time 69% of the time (13 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- 75% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 1482 fares Opens this date on Aviasales
#6 · Southwest 956
11:05 AM → 1:45 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
On time (history)
73%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 73% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 956 fares Opens this date on Aviasales
#7 · American 1888
11:22 AM → 2:07 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
On time (history)
64%
Cancelled
0.0%
Avg arrival delay
63 min
- Arrived on time 64% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- 97% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find American 1888 fares Opens this date on Aviasales
#8 · American 2871
10:57 AM → 1:48 PM2h 51m nonstop
Local times, typical schedule. Last flown 2026-04-06.
75%
chance on time
On time (history)
75%
Cancelled
0.0%
Avg arrival delay
21 min
- Arrived on time 75% of the time (156 flights, Jun 2025 to May 2026).
- Never cancelled in 156 scheduled flights.
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- 54% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 156 flights
Find American 2871 fares Opens this date on Aviasales
#9 · Southwest 3470
10:30 AM → 1:15 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-04-01.
75%
chance on time
On time (history)
63%
Cancelled
0.0%
Avg arrival delay
9 min
- Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3470 fares Opens this date on Aviasales
#10 · Frontier 2851
9:00 AM → 11:55 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-04-13.
74%
chance on time
On time (history)
69%
Cancelled
0.0%
Avg arrival delay
25 min
- Arrived on time 69% of the time (45 flights, Jun 2025 to May 2026).
- Never cancelled in 45 scheduled flights.
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (45 flights), so its score leans on the airline's record at this hour.
Limited track record · 45 flights
Find Frontier 2851 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

American Airlines77%
569 flights · 77% on time as flown · 0.0% cancel
Southwest Airlines77%
593 flights · 77% on time as flown · 0.3% cancel
Frontier Airlines73%
45 flights · 69% on time as flown · 0.1% cancel

On time by departure time

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

Before 9 AM90%
62 flights · avg delay 4 min
9 AM to noon79%
508 flights · avg delay 13 min
Noon to 3 PM79%
225 flights · avg delay 14 min
3 to 6 PM69%
55 flights · avg delay 22 min
6 to 9 PM68%
213 flights · avg delay 22 min
After 9 PM76%
154 flights · avg delay 13 min

Best day: Wednesday (82%). Worst: Friday (73%).

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 aircraft50%
Airline (crew, maintenance, boarding)40%
Air traffic control and airport volume8%

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

Finding the most reliable connections from PHX to GEG…

PHX to GEG questions

What time of day is best to fly PHX to GEG?: Before 9 AM: 90% 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 PHX to GEG?: American, with a season-adjusted 77% chance of operating and arriving on time over 569 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 PHX to GEG?: July (66% on time); the best was February (86%), 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.

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