Route
SEA → BOI
Seattle–Tacoma International Airport Boise Air Terminal/Gowen Field
How punctual is this route?
- On-time arrivals
- 86.3%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,829
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 54%
- Late-arriving aircraft 18%
- Extreme weather 17%
- Air traffic control & airport 11%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 86.2% | 334 |
| October 2025 | 91.6% | 333 |
| November 2025 | 86.7% | 282 |
| December 2025 | 85.3% | 266 |
| January 2026 | 87.0% | 300 |
| February 2026 | 86.7% | 294 |
| March 2026 | 84.6% | 369 |
| April 2026 | 89.3% | 355 |
| May 2026 | 87.9% | 363 |
| June 2026 | 85.6% | 312 |
| July 2026 | 78.8% | 303 |
| August 2026 | 85.4% | 318 |
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 | 2,853 | 87.8% | 0.2% | 61 min |
| Alaska Airlines | 976 | 82.2% | 0.4% | 50 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
OO4127
13% late · 365 flights
-
OO3688
14% late · 361 flights
-
OO3692
14% late · 347 flights
-
OO3750
7% late · 252 flights
-
AS467
15% late · 203 flights
-
OO3959
11% late · 203 flights
-
OO4090
16% late · 198 flights
-
AS318
23% late · 191 flights
-
OO3817
12% late · 176 flights
-
OO3385
11% late · 141 flights
-
AS248
9% late · 110 flights
-
OO3594
5% late · 110 flights
-
OO3712
8% late · 110 flights
-
OO3603
13% late · 107 flights
-
OO3678
9% late · 86 flights
-
AS441
20% late · 70 flights
-
AS1018
18% late · 55 flights
-
AS1034
15% late · 55 flights
-
AS463
39% late · 49 flights
-
AS550
25% late · 48 flights
-
AS233
6% late · 36 flights
-
OO3039
3% late · 36 flights
-
OO4108
17% late · 36 flights
-
AS1439
29% late · 35 flights
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