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Flight Reliability

DL 3643 · Delta Air Lines

TWF → Salt Lake City (TWF–SLC)82% of its flights flew this route. The rest (MSP–ORD, ORD–MSP) are included in these numbers.

95
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
7 min
Average arrival delay
0%
Cancelled
13 min early
Median arrival delay

Based on 239 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

DL 3643 departing between 6–9 AM arrived on time 99% of the time, versus 19% between 3–6 PM.

Skip Tuesday if you can.

DL 3643 arrived on time 94% of the time on Mondays. On Tuesdays: 82%.

Lagging the TWF–SLC route.

DL 3643 arrived on time 87% of the time, versus 96% across the TWF–SLC route.

A bit ahead of the Delta Air Lines network.

DL 3643 arrived on time 87% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon94%(34 flights)
  • Tue82%(34 flights)
  • Wed88%(34 flights)
  • Thu91%(34 flights)
  • Fri88%(34 flights)
  • Sat85%(33 flights)
  • Sun83%(36 flights)
On-time by departure window
  • 6–9 AM99%(195 flights)
  • 9 AM–12 PM67%(12 flights)
  • 12–3 PM31%(16 flights)
  • 3–6 PM19%(16 flights)
On-time trend by month
63%
Dec

Jun 100% → Dec 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%23
July 202597%31
August 2025100%31
September 2025100%30
October 202597%31
November 2025100%30
December 202563%43
Departures on time
89%
Diverted
0%
Flights flown
239
Months covered
10

Same route, other flights

Keep nerding

Based on 239 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.