ORD (Chicago) to SAN (San Diego) flights arrive on time 75% of the time. The most reliable airline on this route is United Airlines at 79%. The average delay is 74 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated July 2026.ORD → SAN
ORD (Chicago) to SAN (San Diego)
ORD → SAN on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 75% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines is significantly more reliable on this route at 79% on time vs Frontier Airlines at 42%.
Airline Comparison
United Airlines leads at 79% on time; Frontier Airlines trails at 42%.
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 ~16 min. Best time: 4 AM (about 5 min).
Arriving at SAN
77% on timeWhen flights into SAN are late, the average delay is 61 minutes. Build buffer if you have ground plans.
If connecting at SAN: TSA is ~11 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 July 2026. Source: Bureau of Transportation Statistics.