Route
PDX → SEA
Portland International Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 84.9%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 61 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4,927
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 45%
- Air traffic control & airport 23%
- Late-arriving aircraft 18%
- Extreme weather 14%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.6% | 463 |
| October 2025 | 88.2% | 458 |
| November 2025 | 89.2% | 441 |
| December 2025 | 80.2% | 412 |
| January 2026 | 85.7% | 407 |
| February 2026 | 91.2% | 343 |
| March 2026 | 85.2% | 380 |
| April 2026 | 89.8% | 372 |
| May 2026 | 85.9% | 391 |
| June 2026 | 84.2% | 404 |
| July 2026 | 82.4% | 427 |
| August 2026 | 74.6% | 429 |
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 | 3,472 | 85.5% | 0.6% | 65 min |
| Alaska Airlines | 1,205 | 82.1% | 1.2% | 51 min |
| Delta Air Lines | 250 | 89.6% | 0.0% | 74 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
OO3953
17% late · 365 flights
-
OO3802
15% late · 349 flights
-
OO3918
16% late · 324 flights
-
OO3818
9% late · 318 flights
-
AS499
7% late · 291 flights
-
OO4008
6% late · 239 flights
-
OO3913
13% late · 210 flights
-
OO3431
19% late · 151 flights
-
OO4062
12% late · 141 flights
-
OO3408
25% late · 91 flights
-
OO3036
15% late · 89 flights
-
OO4471
12% late · 86 flights
-
OO4065
10% late · 82 flights
-
AS465
6% late · 81 flights
-
AS1314
21% late · 75 flights
-
OO3875
12% late · 75 flights
-
AS403
6% late · 71 flights
-
OO3078
17% late · 70 flights
-
OO3752
1% late · 70 flights
-
AS427
52% late · 69 flights
-
AS430
26% late · 69 flights
-
OO3048
19% late · 69 flights
-
OO3923
32% late · 69 flights
-
AS1318
15% late · 68 flights
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