Route
SEA → ORD
Seattle–Tacoma International Airport Chicago O'Hare International Airport
How punctual is this route?
- On-time arrivals
- 76.7%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 83 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5,538
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 36%
- Airline (crew, maintenance, cleaning) 36%
- Late-arriving aircraft 26%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 79.7% | 509 |
| October 2025 | 81.1% | 496 |
| November 2025 | 74.7% | 390 |
| December 2025 | 70.1% | 382 |
| January 2026 | 73.3% | 301 |
| February 2026 | 92.3% | 300 |
| March 2026 | 79.8% | 357 |
| April 2026 | 79.7% | 465 |
| May 2026 | 81.3% | 562 |
| June 2026 | 72.5% | 582 |
| July 2026 | 70.6% | 608 |
| August 2026 | 71.0% | 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 | 1,775 | 73.8% | 1.1% | 64 min |
| United Airlines | 1,488 | 81.6% | 0.8% | 94 min |
| American Airlines | 1,353 | 75.6% | 1.6% | 106 min |
| Delta Air Lines | 922 | 75.7% | 1.3% | 78 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL2108
27% late · 363 flights
-
UA747
12% late · 363 flights
-
AS410
29% late · 352 flights
-
AS538
17% late · 350 flights
-
DL2055
17% late · 303 flights
-
AS265
23% late · 291 flights
-
UA2618
9% late · 283 flights
-
AS328
17% late · 232 flights
-
AS429
44% late · 227 flights
-
AA2398
30% late · 222 flights
-
DL637
31% late · 138 flights
-
UA2101
33% late · 117 flights
-
AA2922
5% late · 111 flights
-
UA2835
26% late · 103 flights
-
AA885
16% late · 97 flights
-
DL2299
33% late · 82 flights
-
UA1503
18% late · 81 flights
-
AA2520
54% late · 76 flights
-
AA2524
41% late · 76 flights
-
AA2881
7% late · 76 flights
-
AA2523
25% late · 74 flights
-
AS578
17% late · 70 flights
-
UA2651
26% late · 70 flights
-
AA2442
24% late · 58 flights
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