BOS to MKE flight delays
Boston, MA (BOS) Milwaukee, WI (MKE) · 860 miles
742 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
80.47%
Arrived on time
Within 15 minutes of schedule
3.23%
Cancelled
Share of scheduled flights
63 min
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In February it ran 30.4 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Cancellation, not delay, is the risk worth pricing here: 3.23% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
The route has been getting better. The later months in the record run 13.2 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
The two directions do not behave alike. MKE to BOS arrives on time 10.6 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Which airline should you fly on this route?
Over January 2025 – August 2026, JetBlue Airways arrived on time most often on BOS to MKE. Republic Airways was late most often. Flights ran closest to schedule in February and worst in December.
Every airline on BOS 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 |
|---|---|---|---|---|---|
| Republic Airways | 549 | 80.8% | 4.01% | 59 min | C |
| JetBlue Airways | 172 | 83.04% | 0.58% | 68 min | B |
| Delta Air Lines | 21 | 50% | 4.76% | 92 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
MKE to BOS Milwaukee back to Boston 69.83% on time FOther routes from Boston
Common questions
Are flights from Boston to Milwaukee usually delayed?
80.47% of flights on the BOS to MKE route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Boston to Milwaukee?
JetBlue Airways, at 83.04% on time across 172 flights. The least punctual on the route was Republic Airways at 80.8%.
How often are BOS to MKE flights cancelled?
3.23% of scheduled flights did not operate — about 32 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
What is the best month to fly Boston to Milwaukee?
February, when 96% of flights arrived on time. The worst was December at 65.6%.
When BOS to MKE flights are late, how late are they?
About 63 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 BOS 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 →