Flight Reliability
UA 1783 · United Airlines
Los Angeles → Boston (LAX–BOS)87% of its flights flew this route. The rest (BOS–EWR, BOS–ORD) are included in these numbers.
83
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 1.4%
- Cancelled
- 10 min early
- Median arrival delay
Based on 421 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
UA 1783 departing between 3–6 AM arrived on time 100% of the time, versus 60% between 6–9 PM.
Friday is doing you no favors.
UA 1783 arrived on time 90% of the time on Saturdays. On Fridays: 78%.
Recent months have been rougher.
UA 1783 arrived on time 84% of the time over the last three months in the data, compared with 94% in the three months before that.
The breakdown
- Mon79%(63 flights)
- Tue80%(56 flights)
- Wed86%(56 flights)
- Thu78%(59 flights)
- Fri78%(63 flights)
- Sat90%(57 flights)
- Sun78%(60 flights)
- 3–6 AM100%(11 flights)
- 6–9 AM83%(356 flights)
- 9 AM–12 PM—(5 flights)
- 6–9 PM60%(42 flights)
79%
May
Jun 80% → May 79% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 30 |
| July 2025 | 74% | 31 |
| August 2025 | 91% | 42 |
| September 2025 | 60% | 30 |
| October 2025 | 58% | 36 |
| November 2025 | 79% | 53 |
| December 2025 | 91% | 32 |
| January 2026 | 100% | 30 |
| February 2026 | 92% | 26 |
| March 2026 | 84% | 31 |
| April 2026 | 90% | 31 |
| May 2026 | 79% | 42 |
- Departures on time
- 83%
- Diverted
- 0.2%
- Flights flown
- 414
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 421 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.