Route reliability record
FLG→PHX
Flagstaff to Phoenix
- Flights
- 1,216
- Period
- September 2025 to August 2026
- Distance
- 119 mi
- Carriers
- 1
This route lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 1,216 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 Saturday. Flights in that window arrived on time 89.2% of the time and Saturday flights 88.7%, against 81.9% for the route overall.
Set against the rest of the country, this route's record is 5 points better than the US average of 77.3%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.
Key figures
On time
81.9%
Arrivals under 15 minutes late, of 1,182 completed flights
Avg delay
120 min
Across delayed arrivals only, not all flights
Cancelled
2.71%
National rate is 1.89%
Best carrier
SkyWest
81.9% on time across 1,216 flights
These figures cover 1,216 flights between September 2025 and August 2026. Beyond the headline rate, 9.8% 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 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 | 1,216 | 81.9% | 120 min | 2.71% | B |
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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 20 points, against half a point between the best and worst carrier.
- 5am–8am306 flights86.0%
- 8am–11am205 flights87.8%
- 11am–2pm378 flights81.7%
- 2pm–5pm114 flights78.6%
- 5pm–8pm176 flights68.8%
- 8pm–5am37 flights89.2%
Scale runs 60% to 95%.
The 8pm–5am window is the strongest at 89.2% on time. The full set of windows spans 20 points.
Explore
Filter FLG to PHX 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 FLG to PHX, the best departure window is 8pm–5am at 89.2% on time and the worst is 5pm–8pm at 68.8%, a wide gap of 20.4 points. All US flights leaving 8pm–5am ran 70.1%.
- 5–8am86.0%
- 8–11am87.8%
- 11am–2pm81.7%
- 2–5pm78.6%
- 5–8pm68.8%
- 8pm–5am89.2%
best all US flightsScale 60% to 95%.
Across the year
When delays peak on this route
This route's year swings by 23 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 91.0% in August. 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, Saturday is the strongest day at 88.7% on time and Monday the weakest at 76.8%, a spread of 12 points.
Delay causes
Why this route gets delayed
Carrier accounts for 54% of the 26,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 21%Late-arriving aircraft
- 14%Extreme weather
- 11%National Airspace System
- 0%Security
Extreme weather accounts for 14% 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 2.3 times the usual weather exposure. The split is drawn from 25,739 reported delay minutes.
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 14,000 of the 26,000 delay minutes reported here.
Cancellations run at 2.71%, against 1.89% nationally. That is about 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
9.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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 is a different operation and performs like one: it runs 78.2% on time across 1,215 flights, 4 points below 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 1,216 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. August runs 91.0% on time and February 68.1%, a swing of 23 points. If the dates move at all, move them out of February before you think about anything else. 1,182 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 six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.1% of the 1,216 flights in this analysis, against 22.7% 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?
81.9% of flights arrive on time here against a national 77.3%, a difference of 5 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 89.2% on time. The 5pm–8pm window is the weakest at 68.8%, 20 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 91.0% in August. Across the year that is 23 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 route75.6%
- LAX to PHX, a related route80.3%
- SEA to PHX, a related route78.2%
- SkyWest Airlines on-time record81.9%
- The US routes with the most cancellations
- The best time of day to fly, according to 7.05 million flight records
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.