Flight OddsDL4155 MFR → SEA
Delta Air Lines · Medford, OR to Seattle, WA · 172 flights observed, 2025-07-01 to 2025-12-19 · 352 mi
DL4155 covers more than one route in the data window — the stats below are for MFR → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
92%
Median delay
-13 min
90th percentile
+12 min
Cancellation rate
3%
How often is DL4155 on time?
Across 172 flights on MFR → SEA from 2025-07-01 to 2025-12-19, DL4155 arrived within 15 minutes of schedule 92% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +12 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 | 153 | 92% |
| 16-30 min | 5 | 3% |
| 31-60 min | 3 | 2% |
| 61-120 min | 3 | 2% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 87% | +29 min |
| 2025-08 | 31 | 97% | -9 min |
| 2025-09 | 30 | 97% | -14 min |
| 2025-10 | 31 | 97% | -17 min |
| 2025-11 | 26 | 81% | +5 min |
| 2025-12 | 18 | 89% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 24 | 83% |
| Tue | 24 | 92% |
| Wed | 24 | 100% |
| Thu | 24 | 96% |
| Fri | 25 | 96% |
| Sat | 24 | 79% |
| Sun | 22 | 95% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…