Route reliability record
MFR→PHX
Medford to Phoenix
- Flights
- 754
- Period
- September 2025 to August 2026
- Distance
- 855 mi
- Carriers
- 2
This route earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 754 MFR to PHX flights, with a median arrival 10 minutes early.
Best time to fly MFR to PHX: a 5am–8am departure, ideally on a Thursday. Flights in that window arrived on time 89.9% of the time and Thursday flights 89.8%, against 84.4% for the route overall.
Set against the rest of the country, this route's record is 7 points better than the US average of 77.3%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 748 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
0.66%
National rate is 1.89%
Best carrier
SkyWest
83.4% on time across 516 flights
These figures cover 754 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Which airline is most reliable on MFR 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 |
|---|---|---|---|---|---|
| Envoy Airthin sample | 238 | 86.4% | 67 min | 1.26% | A |
| SkyWest Airlines | 516 | 83.4% | 94 min | 0.39% | B+ |
Flight by flight
Flights on MFR to PHX
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 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–8am370 flights89.9%
- 8am–11am10 flights—
- 11am–2pm92 flights69.6%
- 2pm–5pm257 flights82.8%
- 5pm–8pm23 flights—
- 8pm–5am2 flights—
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 69.6% on time against 89.9% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 5am–8am window is the busiest, with 370 flights scheduled in it.
Explore
Filter MFR 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 MFR to PHX, the best departure window is 5am–8am at 89.9% on time and the worst is 11am–2pm at 69.6%, a wide gap of 20.3 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am89.9%
- 8–11am—
- 11am–2pm69.6%
- 2–5pm82.8%
- 5–8pm—
- 8pm–5am—
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 21 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.
September is the best month on the calendar at 92.9% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. November was the busiest month here, with 77 flights.
Across the week, Thursday is the strongest day at 89.8% on time and Friday the weakest at 78.6%, a spread of 11 points.
Delay causes
Why this route gets delayed
Carrier accounts for 54% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 30%Late-arriving aircraft
- 10%Extreme weather
- 6%National Airspace System
- 0%Security
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,462 of the 10,000 delay minutes reported here. The split is drawn from 10,145 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 89.9% on time here.
Cancellations are rare at 0.66%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
5.9% 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 an hour and a half, which a normal layover absorbs.
The 855 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 80.9% on time across 754 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.
One caution: this is a thin sample. 754 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
Work out the risk of missing a connection in PHX after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 754 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 84.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 748 completed flights over 12 months sit behind that.
Common questions
MFR to PHX questions
How often is MFR 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 15.6% of the 754 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is MFR to PHX compared with the rest of the country?
84.4% of flights arrive on time here against a national 77.3%, a difference of 7 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on MFR to PHX?
The 5am–8am departure window is the strongest at 89.9% on time. The 11am–2pm window is the weakest at 69.6%, 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 November delays on MFR to PHX?
November is the weakest month at 72.4% on time, compared with 92.9% in September. Across the year that is 21 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 MFR — the return legseparate record
- Phoenix Sky Harbor International (PHX) delay statistics
- Envoy Air on MFR to PHX86.4%
- SkyWest Airlines on MFR to PHX83.4%
- MFR to SEA, a related route89.4%
- DEN to PHX, a related route75.6%
- MFR to SFO, a related route63.7%
- Envoy Air on-time record86.4%
- SkyWest Airlines on-time record83.4%
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. MFR to PHX and PHX to MFR 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.