MDW (Chicago) to BUF (Buffalo) flights arrive on time 75% of the time. The most reliable airline on this route is Southwest Airlines at 75%. The average delay is 52 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated October 2026.MDW → BUF
MDW (Chicago) to BUF (Buffalo)
MDW → BUF on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is delayed fairly often. About 75% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Accurate?
Good to know
Departing from MDW
79% on timeTSA is currently ~16 min. Best time: 4 AM (about 5 min).
Arriving at BUF
78% on timeWhen flights into BUF are late, the average delay is 72 minutes. Build buffer if you have ground plans.
If connecting at BUF: TSA is ~30 min right now. Allow at least 60 minutes for a domestic connection.
BUF has a 2.3% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of MDW? 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 October 2026. Source: Bureau of Transportation Statistics.