Flight OddsUA1734 BOS → IAD
United Airlines · Boston, MA to Washington, DC · 345 flights observed, 2025-07-01 to 2026-06-30 · 412 mi
UA1734 covers more than one route in the data window — the stats below are for BOS → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
97%
Median delay
-13 min
90th percentile
+0 min
Cancellation rate
2%
How often is UA1734 on time?
Across 345 flights on BOS → IAD from 2025-07-01 to 2026-06-30, UA1734 arrived within 15 minutes of schedule 97% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +0 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 328 | 97% |
| 16-30 min | 4 | 1% |
| 31-60 min | 4 | 1% |
| 61-120 min | 1 | 0% |
| 2+ hrs | 1 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 100% | -9 min |
| 2025-08 | 31 | 97% | -9 min |
| 2025-09 | 30 | 100% | -17 min |
| 2025-10 | 31 | 94% | -6 min |
| 2025-11 | 30 | 100% | -12 min |
| 2025-12 | 31 | 94% | -10 min |
| 2026-01 | 17 | 94% | -8 min |
| 2026-02 | 21 | 86% | -7 min |
| 2026-03 | 27 | 100% | -13 min |
| 2026-04 | 30 | 100% | -12 min |
| 2026-05 | 31 | 97% | -9 min |
| 2026-06 | 29 | 100% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 98% |
| Tue | 44 | 100% |
| Wed | 46 | 96% |
| Thu | 51 | 96% |
| Fri | 52 | 100% |
| Sat | 47 | 91% |
| Sun | 50 | 98% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…