SEA → BOISeattle to Boise

live

Direct flights from Seattle (SEA) to Boise (BOI): 107 nonstop departures observed each week across 2 airlines. 71% of the last 17 tracked flights arrived within 15 minutes of schedule. The median arrival is 17 minutes early. No cancellations were recorded across the 17 tracked flights. The nonstop covers 641 km, an estimated 1 hour 19 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Boise. Updated 15 November 2026 at 21:39 UTC.

Today, SEA → BOI

Sun 15 Nov · local times
DL3959Delta Air Lines49 min late

The SEA board at 13:39 shows departure at 14:19 instead of 13:30, gate A6.

Later cancelled
2.7%of 6,256 past Delta Air Lines flights whose board showed 40 to 70 min late
Still to leave today
DL4127 15:10Delta Air Lines · then AS2200 15:40, DL3688 16:05
Track DL3959 →
DL4127Delta Air Lines21 min late

The SEA board at 13:39 shows departure at 15:10 instead of 14:49, gate A2.

Later cancelled
1.3%of 8,275 past Delta Air Lines flights whose board showed 20 to 40 min late
Still to leave today
AS2200 15:40Alaska · then DL3688 16:05, AS2102 17:38
Track DL4127 →
  1. 06:30 AS248Alaska Departed Landed 08:43 −24
  2. 07:15 DL3750Delta Air Lines Departed Landed 09:26 −31
  3. 09:02 DL3817Delta Air Lines Departed BOI est. 11:23In the air · sched 11:33
  4. 09:56 AS2338Alaska Departed BOI est. 12:19In the air · sched 12:25
  5. 11:59 AS2344Alaska Departed ·
  6. 13:00 AS467Alaska Departed ·
  7. 13:30 DL3959Delta Air Lines Est. 14:19 +49Gate A6 ·
  8. 14:49 DL4127Delta Air Lines Est. 15:10 +21Gate A2 ·
  9. 15:40 AS2200Alaska On scheduleGate C2E ·
  10. 16:05 DL3688Delta Air Lines On scheduleGate B4 ·
  11. 17:38 AS2102Alaska On scheduleGate C16C ·
  12. 19:50 AS3176Alaska Est. 20:59 +69Gate C10D ·
  13. 21:20 DL4090Delta Air Lines On scheduleGate B3 ·
  14. 21:24 AS468Alaska On scheduleGate D1 ·

Checked SEA board 13:39 · BOI board 10:03

SEA Seattle busy · +22
BOI Boise smooth · +0
641 km · ~1h 19m est.
dep bank 06:30–21:24107x weekly
Runs mixed · 2 airlines · 107x weekly · nonstop
71% on time

of the last 17 tracked SEA → BOI flights arrived within 15 minutes

Median arrival delay is −17 min. 0 of 17 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−17 minacross the last 17 arrivals
Flight time~1h 19mestimated from route distance
Weekly departures107x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 17

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesDelta Air Lines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Alaska AirlinesAS73% on time

Flights AS248 06:30 daily · AS2338 09:56 daily · AS2344 11:59 daily · AS467 13:00 Mo Th Fr Sa Su

Delta Air LinesDL67% on time

Flights DL3750 07:15 daily · DL3678 08:59 daily · DL3817 09:02 daily · DL3959 varies daily

History

operated legs · board outcomes
11-15AS248arrived−24
11-15DL3750arrived−31
11-14AS2102arrived+28
11-14AS2200arrived+158
11-14AS2338arrived−26
11-14AS2344arrived+33
11-14AS248arrived−22
11-14AS3176arrived−17
11-14AS467arrived−10
11-14AS468arrived−17
11-14DL3688arrived−17
11-14DL3692arrived+29
11-14DL3750arrived−21
11-14DL3817arrived+55
11-14DL3959arrived−27
11-13AS2338arrived+1
11-13AS2344arrived−15

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SEASeattle +22 min busy 🌤 mostly cloudy · SSW 7 kt Full SEA delay board →
BOIBoise +0 min smooth 🌤 overcast · SE 17 kt Full BOI delay board →

Weather lens

Conditions are tightest at BOI: a 40% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +12 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →

How the Seattle to Boise route actually runs

Pro Flight Search records official board updates for nonstop SEA to BOI flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: Seattle (SEA) to Boise (BOI) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SEA-BOI
How we measure this →

SEA to BOI questions

Is SEA–BOI running on time right now?

Smooth skies ahead. The departure side at SEA is the weaker end, route health score 85/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SEA–BOI?

Operators schedule morning departures around 06:30 and evening departures around 17:38 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the BOI delay card to confirm conditions when you'd arrive.

How long is the flight from SEA to BOI?

Great-circle distance is 641 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 75–85 min gate-to-gate on this route.

How often does SEA–BOI fly?

2 carriers operate this route, around 107 flights a week between them. Compare carrier days and times in the airline list above.