SAN to MKE flight delays
San Diego, CA (SAN) Milwaukee, WI (MKE) · 1,739 miles
166 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
74.55%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
55 min
When late, late by
Average across delayed arrivals
15 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Flights from San Diego to Milwaukee run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over January 2025 – August 2026, Southwest Airlines arrived on time most often on SAN to MKE. Flights ran closest to schedule in January and worst in May.
Every airline on SAN to MKE
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 166 | 74.55% | 0% | 55 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
MKE to SAN Milwaukee back to San Diego 70.3% on time DOther routes from San Diego
Common questions
Are flights from San Diego to Milwaukee usually delayed?
74.55% of flights on the SAN to MKE route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from San Diego to Milwaukee?
Only Southwest Airlines appears in the published record on this route, with 166 flights and 74.55% arriving on time.
How often are SAN to MKE flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
When SAN to MKE flights are late, how late are they?
About 55 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SAN to MKE during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →