Historical on-time performance
Indianapolis to Seattle
1,866 miData through May 2026Source: US DOT · BTS
Flights on IND–SEA arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights
based on 509 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time72%Medianon timep9035 minCancel1.2%Flights509
Why flights run late
Delay causes
- Airline17%
- Weather4%
- Air traffic (NAS)20%
- Late aircraft59%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline33%
- Weather67%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 6 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IND → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 77% on time.
- Mornings77% on time · p90 30 min · 647 flights
- Evenings73% on time · p90 40 min · 976 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 78% on time.
- Wednesdays78% on time · p90 25 min · 224 flights
- Tuesdays77% on time · p90 30 min · 203 flights
- Thursdays76% on time · p90 25 min · 243 flights
- Mondays76% on time · p90 35 min · 245 flights
- Fridays74% on time · p90 45 min · 249 flights
- Saturdays72% on time · p90 50 min · 222 flights
- Sundays70% on time · p90 45 min · 238 flights
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