ORD (Chicago) to MSO (Missoula) flights arrive on time 79% of the time. The most reliable airline on this route is United Airlines at 88%. The average delay is 54 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.ORD → MSO
ORD (Chicago) to MSO (Missoula)
ORD → MSO on-time performance by month
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This route is on time most of the time. About 79% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines edges out null on this route — 88% vs 74% on time.
Airline Comparison
United Airlines leads at 88% on time; trails at 74%.
Accurate?
Good to know
Departing from ORD
75% on timeExpect ~22 min sitting on the taxiway after your gate pushes back. ORD has long runway queues.
TSA is currently ~15 min. Best time: 4 AM (about 5 min).
Arriving at MSO
82% on timeWhen flights into MSO are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at MSO: TSA is ~23 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what United Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of ORD? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.