ON TIMEBOARD

GEG → PHX on time

Spokane (Spokane, WA) to Phoenix Sky Harbor (Phoenix, AZ). Every scheduled flight, September 2025 to August 2026.

On time
83%
arrived < 15 min late
Cancelled
0.5%
1,264 flights
Typical arrival
−6 min
median vs schedule
When late
+83 min
average delay
Flights / day
3
3 airlines

83% of flights from Spokane to Phoenix arrived on time over the past 12 months. That is better than the typical U.S. route. The 6 a.m. departures ran on time 89% of the time; the 3 p.m. ones 77%. Most reliable airline: Southwest Airlines (84%). 6% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for GEG → PHX: when a flight was late, it was under 45 minutes late 58% of the time. About 1 in 21 flights landed an hour or more late, and 1 in 79 three hours or more; 0.5% were cancelled outright.

Share of all 1,264 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Southwest Airlines61884%0.5%−6 min3.7%+49 minSouthwest Airlines
American Airlines60183%0.3%−7 min5.5%+118 minAmerican Airlines 98%, Envoy 2%
Frontier Airlines45—————Frontier Airlines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at GEG). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%5 a.m. departures: too few flights (96 flights)5a6 a.m. departures: 89% on time (426 flights)896a7 a.m. departures: too few flights (75 flights)7a8 a.m. departures: too few flights (8 flights)8a9 a.m. departures: too few flights (1 flights)9a10 a.m. departures: too few flights (56 flights)10a11 a.m. departures: too few flights (6 flights)11anoon departures: too few flights (56 flights)12p1 p.m. departures: too few flights (25 flights)1p2 p.m. departures: too few flights (79 flights)2p3 p.m. departures: 77% on time (308 flights)773p4 p.m. departures: too few flights (33 flights)4p5 p.m. departures: too few flights (45 flights)5p6 p.m. departures: too few flights (36 flights)6p
GEG → PHX, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By airline and hour

DepartsSouthwest AirlinesAmerican Airlines
6 a.m.93%87%
3 p.m.—79%

Last flight of the day

On GEG → PHX, each airline's last flight of the day was cancelled 0.0% of the time, against 1.0% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 1.3% of the time (earlier flights: 1.4%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

AirlineLast departureLast: cancelledLast: 3h+ lateEarlier: cancelledNext morning
American Airlines3:00 p.m.0.0%2.2%0.8%first flight 6:30 a.m.
Southwest Airlines4:20 p.m.0.0%0.4%1.2%first flight 7:00 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

By month

Each calendar month pooled over 2023–2026. Best: September (91%). Worst: December (79%).

40%70%100%Jan: 80% on time (310 flights)80JanFeb: 87% on time (292 flights)87FebMar: 84% on time (367 flights)84MarApr: 87% on time (343 flights)87AprMay: 87% on time (312 flights)87MayJun: 84% on time (296 flights)84JunJul: 82% on time (299 flights)82JulAug: 87% on time (277 flights)87AugSep: 91% on time (223 flights)91SepOct: 86% on time (277 flights)86OctNov: 87% on time (308 flights)87NovDec: 79% on time (326 flights)79Dec

By day of week

DayFlightsOn timeCancelled
Monday18180%1.1%
Tuesday15080%0.7%
Wednesday15190%0.7%
Thursday20282%0.0%
Friday18185%0.0%
Saturday17688%0.6%
Sunday22377%0.4%

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Airline (crew, maintenance, ops) 41%Late inbound plane 39%Severe weather 12%Air traffic & airport (NAS) 8%

Cancellations: airline 3 · weather 3

Month by month

60%80%100%Sep 2023Jan 2024Jan 2025Jan 2026Mar 2024: 85% on time, 0.9% cancelledApr 2024: 89% on time, 0.0% cancelledAug 2024: 91% on time, 0.0% cancelledOct 2024: 85% on time, 0.0% cancelledNov 2024: 89% on time, 0.0% cancelledDec 2024: 79% on time, 0.0% cancelledJan 2025: 87% on time, 0.0% cancelledMar 2025: 90% on time, 0.0% cancelledApr 2025: 84% on time, 0.0% cancelledDec 2025: 82% on time, 0.0% cancelledJan 2026: 75% on time, 0.8% cancelledFeb 2026: 90% on time, 0.0% cancelledMar 2026: 76% on time, 0.8% cancelledApr 2026: 89% on time, 0.8% cancelledMay 2026: 87% on time, 0.9% cancelledJun 2026: 79% on time, 0.0% cancelledJul 2026: 78% on time, 0.9% cancelled
Share of flights on time, by month (hover a point for cancellations)
GEG → PHX, monthly on-time and cancellation rate.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
AA 26976:34 a.m.25387%0.0%−7 minAmerican Airlines

Worst days in the past year

DateFlightsOn timeCancelled
Mar 13, 202640%0
Jan 4, 2026520%0
Dec 29, 2025425%0
Mar 20, 2026425%0
Jan 27, 2026333%0

Questions

How often are flights from GEG to PHX on time?

83% of 1,264 scheduled flights from Spokane, WA to Phoenix, AZ arrived within 15 minutes of schedule between September 2025 and August 2026. 0.5% were cancelled.

What is the best time of day to fly GEG to PHX?

Flights scheduled to leave at 6 a.m. were the most reliable (89% on time). The 3 p.m. departures were the least (77%).

Which airline is most on time from GEG to PHX?

Southwest Airlines: 84% of its 618 flights on the route arrived on time. American Airlines: 83%.

What month has the most delays from GEG to PHX?

December (79% on time). The best month is September (91%), over 2023–2026.

Is the last flight of the day from GEG to PHX more likely to be cancelled?

No, the opposite. Each airline's last GEG–PHX flight of the day was cancelled 0.0% of the time over the past year, against 1.0% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.