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Flight Reliability

F9 2209 · Frontier Airlines

Chicago → Denver (MDW–DEN)

62
A Little Dicey
WanderNerd Reliability Score
66%
Arrive within 15 minutes
16 min
Average arrival delay
0%
Cancelled
6 min early
Median arrival delay

Based on 87 historical flights. Data through May 2026.

What the data says

Saturdays have been rough.

F9 2209 arrived on time 83% of the time on Mondays and just 46% on Saturdays. That gap is worth planning around.

Lagging the MDW–DEN route.

F9 2209 arrived on time 66% of the time, versus 74% across the MDW–DEN route.

Lagging the Frontier Airlines network.

F9 2209 arrived on time 66% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon83%(18 flights)
  • Tue—(1 flights)
  • Wed—(0 flights)
  • Thu69%(16 flights)
  • Fri71%(21 flights)
  • Sat46%(11 flights)
  • Sun50%(18 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM70%(66 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM—(9 flights)
On-time trend by month
90%
Nov

Jun 75% → Nov 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%20
July 202555%20
August 202569%13
October 202557%14
November 202590%10
Departures on time
74%
Diverted
2.3%
Flights flown
85
Months covered
6

Same route, other flights

Keep nerding

Based on 87 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.