Route
ORD → SEA
Chicago O'Hare International Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 67.5%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5,542
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 28%
- Air traffic control & airport 24%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.2% | 509 |
| October 2025 | 74.5% | 496 |
| November 2025 | 62.2% | 391 |
| December 2025 | 47.9% | 384 |
| January 2026 | 65.5% | 301 |
| February 2026 | 73.6% | 301 |
| March 2026 | 51.0% | 357 |
| April 2026 | 75.8% | 465 |
| May 2026 | 73.1% | 562 |
| June 2026 | 67.8% | 582 |
| July 2026 | 64.7% | 608 |
| August 2026 | 61.6% | 586 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 1,778 | 65.4% | 1.8% | 72 min |
| United Airlines | 1,489 | 74.0% | 0.6% | 65 min |
| American Airlines | 1,353 | 64.1% | 1.6% | 71 min |
| Delta Air Lines | 922 | 66.0% | 1.4% | 71 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL2041
27% late · 365 flights
-
AS407
37% late · 358 flights
-
AS587
34% late · 267 flights
-
AS329
37% late · 255 flights
-
UA2211
42% late · 253 flights
-
UA2099
18% late · 217 flights
-
AA2398
40% late · 205 flights
-
AS337
51% late · 186 flights
-
UA1801
29% late · 179 flights
-
DL1564
35% late · 177 flights
-
AS715
18% late · 137 flights
-
UA1620
15% late · 106 flights
-
AA3105
55% late · 105 flights
-
UA1660
16% late · 103 flights
-
UA341
14% late · 103 flights
-
DL637
39% late · 100 flights
-
DL2299
33% late · 89 flights
-
AA3221
40% late · 87 flights
-
DL1418
43% late · 87 flights
-
AS579
24% late · 83 flights
-
UA2278
26% late · 78 flights
-
AA1459
53% late · 76 flights
-
AA2520
30% late · 76 flights
-
AA2524
43% late · 76 flights
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