Route
SEA → PDX
Seattle–Tacoma International Airport Portland International Airport
How punctual is this route?
- On-time arrivals
- 82.2%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 56 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4,826
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 52%
- Late-arriving aircraft 21%
- Air traffic control & airport 14%
- Extreme weather 13%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.1% | 433 |
| October 2025 | 88.0% | 428 |
| November 2025 | 85.6% | 403 |
| December 2025 | 73.7% | 378 |
| January 2026 | 84.8% | 402 |
| February 2026 | 87.0% | 361 |
| March 2026 | 79.6% | 397 |
| April 2026 | 90.6% | 374 |
| May 2026 | 84.4% | 391 |
| June 2026 | 81.9% | 403 |
| July 2026 | 76.7% | 426 |
| August 2026 | 71.7% | 430 |
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 |
|---|---|---|---|---|
| SkyWest Airlines | 3,375 | 84.6% | 0.6% | 58 min |
| Alaska Airlines | 1,202 | 76.7% | 1.3% | 49 min |
| Delta Air Lines | 249 | 76.3% | 0.0% | 69 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
OO3953
7% late · 365 flights
-
OO3802
15% late · 349 flights
-
OO3913
19% late · 341 flights
-
OO3918
16% late · 323 flights
-
AS498
28% late · 294 flights
-
OO3818
12% late · 256 flights
-
OO3997
9% late · 141 flights
-
OO4062
15% late · 141 flights
-
AS466
20% late · 114 flights
-
OO3204
24% late · 103 flights
-
OO4023
8% late · 93 flights
-
OO3416
10% late · 86 flights
-
OO3923
19% late · 86 flights
-
OO3701
11% late · 85 flights
-
OO4065
9% late · 85 flights
-
AS1408
21% late · 77 flights
-
OO3392
5% late · 74 flights
-
AS1333
18% late · 72 flights
-
AS1457
35% late · 70 flights
-
AS686
33% late · 70 flights
-
OO3090
4% late · 70 flights
-
DL2384
32% late · 69 flights
-
OO3132
19% late · 69 flights
-
OO4472
32% late · 69 flights
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