BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
IND→SEA

Indianapolis, IN (IND) to Seattle, WA (SEA) flight delay odds

71.3% of 564 official scheduled IND-to-SEA flights arrived on time; 13.8% arrived at least 30 minutes late and 1.4% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
71.3%arrived on time
13.8%30+ min late
1.4%cancelled
564scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.4%all scheduled flights
120+ minutes late2.1%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+8.5 mincompleted flights

Which departure time was most reliable for IND to SEA?

Among qualifying IND-to-SEA departure window results, Early morning had the highest on-time rate: 77.4% of 270 flights. Evening was lowest at 65.5% across 293 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning27077.4%11.1%1.9%
Evening29365.5%16.4%1.0%

Which weekday was most reliable for IND to SEA?

Among qualifying IND-to-SEA weekday results, Thursday had the highest on-time rate: 77.4% of 84 flights. Sunday was lowest at 63.9% across 83 flights.

DayFlightsOn time30+ minCancelled
Monday8870.5%15.9%1.1%
Tuesday7075.7%7.1%0.0%
Wednesday7568.0%14.7%1.3%
Thursday8477.4%7.1%1.2%
Friday8775.9%17.2%2.3%
Saturday7767.5%23.4%1.3%
Sunday8363.9%10.8%2.4%

Which airline was most reliable for IND to SEA?

Only Alaska Airlines met the IND-to-SEA airline threshold: 71.3% of 564 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines56471.3%13.8%1.4%

Which month was most reliable for IND to SEA?

Among qualifying IND-to-SEA month results, May 2026 had the highest on-time rate: 91.9% of 62 flights. December 2025 was lowest at 53.7% across 41 flights.

MonthFlightsOn time30+ minCancelled
July 20256163.9%19.7%0.0%
August 20255964.4%20.3%0.0%
September 20255174.5%7.8%0.0%
October 20254883.3%4.2%4.2%
November 20253876.3%7.9%0.0%
December 20254153.7%29.3%2.4%
January 20262958.6%24.1%6.9%
February 20262669.2%19.2%0.0%
March 20263855.3%18.4%2.6%
April 20265188.2%2.0%2.0%
May 20266291.9%1.6%0.0%
June 20266063.3%20.0%1.7%

What drove IND to SEA delay minutes?

Late aircraft was the largest recorded IND-to-SEA delay category, accounting for 53.1% of 7,912 BTS-attributed delay minutes during July 2025–June 2026.

Airline24.2%
Late aircraft53.1%
National airspace18.6%
Weather4.1%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.