Route reliability record
PHX→FLG
Phoenix to Flagstaff
- Flights
- 1,215
- Period
- September 2025 to August 2026
- Distance
- 119 mi
- Carriers
- 1
This route lands a B, about a point better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 1,215 PHX to FLG flights, with a median arrival 7 minutes early.
Best time to fly PHX to FLG: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 84.0% of the time and Wednesday flights 84.9%, against 78.2% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.2%
Arrivals under 15 minutes late, of 1,176 completed flights
Avg delay
103 min
Across delayed arrivals only, not all flights
Cancelled
2.72%
National rate is 1.89%
Best carrier
SkyWest
78.2% on time across 1,215 flights
These figures cover 1,215 flights between September 2025 and August 2026. Beyond the headline rate, 8.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on PHX to FLG
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 1,215 | 78.2% | 103 min | 2.72% | B |
Flight by flight
Flights on PHX to FLG
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 1,215 flights.
- 5am–8am—
- 8am–11am369 flights84.0%
- 11am–2pm187 flights75.0%
- 2pm–5pm257 flights77.0%
- 5pm–8pm237 flights75.8%
- 8pm–5am165 flights74.7%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 84.0% of the time, against 74.7% for the overnight window. That is 9 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 369 flights scheduled in it.
Explore
Filter PHX to FLG by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On PHX to FLG, the best departure window is 8am–11am at 84.0% on time and the worst is 8pm–5am at 74.7%, a real gap of 9.3 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am84.0%
- 11am–2pm75.0%
- 2–5pm77.0%
- 5–8pm75.8%
- 8pm–5am74.7%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 18 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
February is the weak month at 67.1% on time, against 85.5% in April. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. November was the busiest month here, with 129 flights.
Across the week, Wednesday is the strongest day at 84.9% on time and Sunday the weakest at 65.8%, a spread of 19 points.
Delay causes
Why this route gets delayed
Carrier accounts for 60% of the 26,000 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 25%Late-arriving aircraft
- 10%National Airspace System
- 6%Extreme weather
The largest share of delay minutes, 60%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 16,000 of the 26,000 delay minutes reported here. The split is drawn from 26,475 reported delay minutes.
Cancellations run at 2.72%, against 1.89% nationally. That is roughly one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here actually costs
8.8% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
At 119 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 81.9% on time across 1,216 flights, 4 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
The sample behind these figures is 1,215 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in FLG after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 85.5% on time and February 67.1%, a swing of 18 points. If the dates move at all, move them out of February before you think about anything else. 1,176 completed flights over 12 months sit behind that.
Common questions
PHX to FLG questions
How often is PHX to FLG delayed?
Roughly one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.8% of the 1,215 flights in this analysis, against 22.7% nationally. Delayed flights are late by close to two hours on average.
How reliable is PHX to FLG compared with the rest of the country?
78.2% of flights arrive on time here against a national 77.3%, a difference of about a point in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on PHX to FLG?
The 8am–11am departure window is the strongest at 84.0% on time. The 8pm–5am window is the weakest at 74.7%, 9 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are February delays on PHX to FLG?
February is the weakest month at 67.1% on time, compared with 85.5% in April. Across the year that is 18 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- FLG to PHX — the return legseparate record
- Phoenix Sky Harbor International (PHX) delay statistics
- PHX to DEN, a related route76.7%
- PHX to LAX, a related route82.1%
- PHX to SEA, a related route82.2%
- SkyWest Airlines on-time record78.2%
- The US routes with the most cancellations
- The best time of day to fly, according to 7.05 million flight records
Direction matters. PHX to FLG and FLG to PHX are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.