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

Seattle, WA (SEA) to Lewiston, ID (LWS) flight delay odds

92.0% of 364 official scheduled SEA-to-LWS flights arrived on time; 4.4% arrived at least 30 minutes late and 0.3% 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 SIGNALLower disruption
92.0%arrived on time
4.4%30+ min late
0.3%cancelled
364scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late1.1%all scheduled flights
120+ minutes late0.3%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival-8.0 mincompleted flights

Which departure time was most reliable for SEA to LWS?

Among qualifying SEA-to-LWS departure window results, Evening had the highest on-time rate: 93.2% of 237 flights. Night was lowest at 89.8% across 127 flights.

Departure windowFlightsOn time30+ minCancelled
Evening23793.2%3.8%0.4%
Night12789.8%5.5%0.0%

Which weekday was most reliable for SEA to LWS?

Among qualifying SEA-to-LWS weekday results, Tuesday had the highest on-time rate: 98.1% of 52 flights. Sunday was lowest at 86.5% across 52 flights.

DayFlightsOn time30+ minCancelled
Monday5296.2%0.0%0.0%
Tuesday5298.1%0.0%0.0%
Wednesday5294.2%3.8%0.0%
Thursday5286.5%7.7%0.0%
Friday5292.3%7.7%0.0%
Saturday5290.4%1.9%0.0%
Sunday5286.5%9.6%1.9%

Which airline was most reliable for SEA to LWS?

Only SkyWest Airlines met the SEA-to-LWS airline threshold: 92.0% of 364 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines36492.0%4.4%0.3%

Which month was most reliable for SEA to LWS?

Among qualifying SEA-to-LWS month results, September 2025 had the highest on-time rate: 96.7% of 30 flights. April 2026 was lowest at 83.3% across 30 flights.

MonthFlightsOn time30+ minCancelled
July 20253193.5%3.2%0.0%
August 20253090.0%3.3%0.0%
September 20253096.7%3.3%0.0%
October 20253193.5%3.2%0.0%
November 20253096.7%3.3%0.0%
December 20253193.5%3.2%0.0%
January 20263187.1%9.7%3.2%
February 20262889.3%3.6%0.0%
March 20263193.5%3.2%0.0%
April 20263083.3%6.7%0.0%
May 20263190.3%9.7%0.0%
June 20263096.7%0.0%0.0%

What drove SEA to LWS delay minutes?

Weather was the largest recorded SEA-to-LWS delay category, accounting for 49.5% of 1,687 BTS-attributed delay minutes during July 2025–June 2026.

Airline48.0%
Late aircraft0.0%
National airspace2.5%
Weather49.5%
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.