FlightRecord

Seattle (SEA) to Indianapolis (IND): On-Time Performance

Data through July 2026

The calendar drives reliability on SEA–IND. November 2024 flights landed on schedule 97% of the time, but July 2025 dropped to 51% — a gap of 47 points. Across the full period the route averages 74% on-time against a national 78%.

On-time
74%
arrived <15 min late
Avg delay
12 min
completed flights
Cancelled
0.8%
Flights/day
1.5
last 12 months
Duration
4h 11m
scheduled
Distance
1,866 mi

Monthly on-time trend

Monthly on-time percentage for SEA to IND flights50%75%100%August 2024: 80% on-time (60 flights)80Aug 2024September 2024: 64% on-time (56 flights)64October 2024: 89% on-time (45 flights)89November 2024: 97% on-time (39 flights)97Nov 2024December 2024: 76% on-time (45 flights)76January 2025: 59% on-time (28 flights)59February 2025: 79% on-time (24 flights)79Feb 2025March 2025: 77% on-time (31 flights)77April 2025: 72% on-time (39 flights)72May 2025: 60% on-time (62 flights)60May 2025June 2025: 64% on-time (60 flights)64July 2025: 51% on-time (61 flights)51August 2025: 54% on-time (59 flights)54Aug 2025September 2025: 71% on-time (51 flights)71October 2025: 87% on-time (48 flights)87November 2025: 87% on-time (39 flights)87Nov 2025December 2025: 68% on-time (41 flights)68January 2026: 78% on-time (29 flights)78February 2026: 88% on-time (25 flights)88Feb 2026March 2026: 82% on-time (39 flights)82April 2026: 86% on-time (51 flights)86May 2026: 84% on-time (62 flights)84May 2026June 2026: 73% on-time (60 flights)73July 2026: 79% on-time (61 flights)79

Best time to fly from SEA to IND

Aim for departures around 9 a.m. (80% on-time); avoid 10 a.m. departures (71%).

On-time percentage by scheduled departure hour, SEA to IND9 a.m.: 80% on-time (52 flights)910 a.m.: 71% on-time (566 flights)1011 a.m.: 80% on-time (120 flights)119 p.m.: 73% on-time (167 flights)2110 p.m.: 75% on-time (231 flights)2211 p.m.: 78% on-time (27 flights)23scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday76%12 min
Tuesdaybest77%9 min
Wednesday76%11 min
Thursday76%12 min
Friday72%13 min
Saturday71%14 min
Sunday70%16 min

What causes delays on this route

Share of total delay minutes by cause, as reported by carriers to the US DOT.

  • Late-arriving aircraft40%
  • Airline operations40%
  • National airspace system19%
  • Weather1%

Frequently asked questions

How often are flights from SEA to IND delayed?
26% of SEA–IND flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 12 minutes.
What is the best time of day to fly from SEA to IND?
Departures around 9 a.m. have the best record (80% on-time), while departures around 10 a.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from SEA to IND?
The scheduled SEA–IND flight time averages 4h 11m over 1,866 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
How often are SEA to IND flights cancelled?
0.8% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
What is the worst month to fly from SEA to IND?
July 2025 was the roughest month in this dataset, with only 51% of arrivals on time. The best was November 2024 at 97%. If your dates are flexible, that 47-point gap is worth planning around.

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Based on 1,177 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.