Flight OddsUA688 IAD → BOS
United Airlines · Washington, DC to Boston, MA · 362 flights observed, 2025-07-01 to 2026-06-30 · 412 mi
UA688 covers more than one route in the data window — the stats below are for IAD → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
62%
Median delay
+5 min
90th percentile
+119 min
Cancellation rate
3%
How often is UA688 on time?
Across 362 flights on IAD → BOS from 2025-07-01 to 2026-06-30, UA688 arrived within 15 minutes of schedule 62% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +119 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 217 | 62% |
| 16-30 min | 31 | 9% |
| 31-60 min | 34 | 10% |
| 61-120 min | 34 | 10% |
| 2+ hrs | 35 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 52% | +99 min |
| 2025-08 | 31 | 68% | +23 min |
| 2025-09 | 29 | 34% | +53 min |
| 2025-10 | 31 | 45% | +41 min |
| 2025-11 | 28 | 61% | +22 min |
| 2025-12 | 29 | 72% | +14 min |
| 2026-01 | 28 | 82% | -1 min |
| 2026-02 | 25 | 80% | +11 min |
| 2026-03 | 29 | 72% | +15 min |
| 2026-04 | 30 | 60% | +23 min |
| 2026-05 | 31 | 65% | +27 min |
| 2026-06 | 29 | 55% | +28 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 49 | 59% |
| Tue | 52 | 62% |
| Wed | 51 | 67% |
| Thu | 51 | 55% |
| Fri | 51 | 65% |
| Sat | 49 | 78% |
| Sun | 48 | 48% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…