Flight Reliability
UA 5499 · United Airlines
Chicago → SBN (ORD–SBN)
29
Bring Snacks
WanderNerd Reliability Score
- 55%
- Arrive within 15 minutes
- 46 min
- Average arrival delay
- 3.1%
- Cancelled
- 11 min
- Median arrival delay
Based on 354 historical flights. Data through May 2026.
What the data says
Saturdays have been rough.
UA 5499 arrived on time 63% of the time on Fridays and just 40% on Saturdays. That gap is worth planning around.
Lagging the ORD–SBN route.
UA 5499 arrived on time 55% of the time, versus 63% across the ORD–SBN route.
Well behind the United Airlines network.
UA 5499 arrived on time 55% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 5499 was cancelled 3.1% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon52%(48 flights)
- Tue62%(50 flights)
- Wed62%(47 flights)
- Thu57%(49 flights)
- Fri63%(49 flights)
- Sat40%(45 flights)
- Sun48%(52 flights)
77%
May
Jun 52% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 52% | 29 |
| July 2025 | 39% | 28 |
| August 2025 | 60% | 30 |
| September 2025 | 59% | 27 |
| October 2025 | 63% | 27 |
| November 2025 | 64% | 28 |
| December 2025 | 50% | 28 |
| January 2026 | 40% | 30 |
| February 2026 | 56% | 27 |
| March 2026 | 33% | 27 |
| April 2026 | 66% | 29 |
| May 2026 | 77% | 30 |
- Departures on time
- 55%
- Diverted
- 0.8%
- Flights flown
- 340
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 354 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.