Route reliability record
FLG→PHX
Flagstaff to Phoenix
- Flights
- 1,202
- Period
- July 2025 to June 2026
- Distance
- 119 mi
- Carriers
- 1
This route lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 1,202 FLG to PHX flights, with a median arrival 9 minutes early.
Best time to fly FLG to PHX: a 8pm–5am departure, ideally on a Tuesday. Flights in that window arrived on time 89.5% of the time and Tuesday flights 86.7%, against 80.6% for the route overall.
The US average over the same twelve months is 77.6%, 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
80.6%
Arrivals under 15 minutes late, of 1,177 completed flights
Avg delay
114 min
Across delayed arrivals only, not all flights
Cancelled
2.00%
National rate is 1.81%
Best carrier
SkyWest
80.6% on time across 1,202 flights
These figures cover 1,202 flights between July 2025 and June 2026. Beyond the headline rate, 10.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on FLG to PHX
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 | 1,202 | 80.6% | 114 min | 2.00% | B |
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 22 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am244 flights84.6%
- 8am–11am264 flights86.7%
- 11am–2pm359 flights79.9%
- 2pm–5pm91 flights81.1%
- 5pm–8pm206 flights67.7%
- 8pm–5am38 flights89.5%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is the strongest at 89.5% on time. The full set of windows spans 22 points.
Across the year
When delays peak on this route
This route's year swings by 20 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 68.1% on time, against 88.2% 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 130 flights.
Across the week, Tuesday is the strongest day at 86.7% on time and Sunday the weakest at 74.6%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Carrier accounts for 58% of the 26,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 58%Carrier
- 19%Late-arriving aircraft
- 12%Extreme weather
- 11%National Airspace System
- 0%Security
Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 25,945 reported delay minutes.
The largest share of delay minutes, 58%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 15,000 of the 26,000 delay minutes reported here.
Cancellations sit at 2.00% against a national 1.81%, which is ordinary. Diversions add another 0.08%.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
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 8pm–5am window matters as much as it does.
The return leg runs 77.8% on time across 1,201 flights, within 3 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,202 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 PHX 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 88.2% on time and February 68.1%, a swing of 20 points. If the dates move at all, move them out of February before you think about anything else. 1,177 completed flights over 12 months sit behind that.
Common questions
FLG to PHX questions
How often is FLG to PHX delayed?
About 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 19.4% of the 1,202 flights in this analysis, against 22.4% nationally. Delayed flights are late by close to two hours on average.
How reliable is FLG to PHX compared with the rest of the country?
80.6% of flights arrive on time here against a national 77.6%, a difference of 3 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on FLG to PHX?
The 8pm–5am departure window is the strongest at 89.5% on time. The 5pm–8pm window is the weakest at 67.7%, 22 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 FLG to PHX?
February is the weakest month at 68.1% on time, compared with 88.2% in April. Across the year that is 20 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
- PHX to FLG — the return legseparate record
- Phoenix Sky Harbor International (PHX) delay statistics
- DEN to PHX, a related route75.7%
- LAX to PHX, a related route80.9%
- SEA to PHX, a related route79.2%
- SkyWest Airlines on-time record80.6%
- The best time of day to fly, according to 7.04 million flight records
- How often a connection fails at the major US hubs
Direction matters. FLG to PHX and PHX to FLG 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.