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Flight Reliability

F9 1736 · Frontier Airlines

Phoenix → Chicago (PHX–MDW)

74
Usually Fine
WanderNerd Reliability Score
70%
Arrive within 15 minutes
10 min
Average arrival delay
1.0%
Cancelled
7 min early
Median arrival delay

Based on 101 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 1736 departing between 3–6 PM arrived on time 74% of the time, versus 66% between 12–3 PM.

Thursdays have been rough.

F9 1736 arrived on time 81% of the time on Mondays and just 64% on Thursdays. That gap is worth planning around.

A bit behind the PHX–MDW route.

F9 1736 arrived on time 70% of the time, versus 75% across the PHX–MDW route.

A bit behind the Frontier Airlines network.

F9 1736 arrived on time 70% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon81%(16 flights)
  • Tue—(3 flights)
  • Wed—(1 flights)
  • Thu64%(28 flights)
  • Fri75%(12 flights)
  • Sat—(3 flights)
  • Sun68%(37 flights)
On-time by departure window
  • 6–9 AM—(8 flights)
  • 9 AM–12 PM73%(30 flights)
  • 12–3 PM66%(38 flights)
  • 3–6 PM74%(19 flights)
  • 6–9 PM—(5 flights)
On-time trend by month
91%
Dec

Oct 67% → Dec 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202567%12
November 202579%14
December 202591%11
Departures on time
73%
Diverted
0%
Flights flown
100
Months covered
12

Same route, other flights

Keep nerding

Based on 101 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.