Flight OddsAS737 IAD → SEA
Alaska Airlines · Washington, DC to Seattle, WA · 99 flights observed, 2026-03-18 to 2026-06-30 · 2,305 mi
AS737 covers more than one route in the data window — the stats below are for IAD → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
56%
Median delay
+10 min
90th percentile
+73 min
Cancellation rate
2%
How often is AS737 on time?
Across 99 flights on IAD → SEA from 2026-03-18 to 2026-06-30, AS737 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +10 min, and the worst 10% of flights arrived +73 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 | 54 | 56% |
| 16-30 min | 22 | 23% |
| 31-60 min | 8 | 8% |
| 61-120 min | 10 | 10% |
| 2+ hrs | 3 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 14 | 21% | +32 min |
| 2026-04 | 28 | 64% | +13 min |
| 2026-05 | 27 | 63% | +21 min |
| 2026-06 | 28 | 57% | +23 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 15 | 67% |
| Tue | 12 | 42% |
| Wed | 14 | 43% |
| Thu | 14 | 64% |
| Fri | 15 | 53% |
| Sat | 12 | 67% |
| Sun | 15 | 53% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…