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Route · BWI → MKE · 2020–2025 BTS data

Baltimore to Milwaukee

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BWI to MKE (Baltimore to Milwaukee) ranks #2656 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

76.3%
On-time
-2.7 pts
vs US avg
58 min
Delay when late
4,551
Flights
#2656 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Sep 2025 92%

Worst Month

Jul 2024 60%

Distance

641 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 75 27 2 0 WN
Nov 2025 74 16 1 0 WN
Oct 2025 89 18 0 0 WN
Sep 2025 78 6 0 0 WN
Aug 2025 79 12 1 1 WN
Jul 2025 90 31 0 0 NK,WN
Jun 2025 91 24 1 0 WN,NK
May 2025 69 17 1 0 WN,NK
Apr 2025 59 14 0 0 WN
Mar 2025 55 10 1 0 WN
Feb 2025 43 5 0 0 WN
Jan 2025 45 6 3 0 WN
Dec 2024 73 18 0 0 WN
Nov 2024 73 12 0 0 WN
Oct 2024 88 11 1 0 WN
Sep 2024 94 13 0 0 WN
Aug 2024 104 40 2 0 NK,WN
Jul 2024 88 35 0 0 WN
Jun 2024 83 31 0 0 WN
May 2024 61 23 0 0 WN
Apr 2024 59 21 0 0 WN
Mar 2024 57 15 0 0 WN
Feb 2024 54 6 0 0 WN
Jan 2024 59 12 5 0 WN

BWI–MKE seasonal on-time pattern

Best: February (84.4%) · weakest: July (67.6%)

65%70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 72%

Strongest calendar month

February

84.4% on-time · ~45 flights/mo

Busiest calendar month

August

~82 flights/mo avg

Weakest calendar month

July

67.6% on-time · ~80 flights/mo

Cancellation Rate

1.0%

18 of 1,740 flights

Diversion Rate

0.1%

1 of 1,740 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

BWI - Baltimore

Full on-time, delay-cause, and seasonal performance for Baltimore, MD.

BWI on-time profile

MKE - Milwaukee

Full on-time, delay-cause, and seasonal performance for Milwaukee, WI.

MKE on-time profile

Compare the two airports

See BWI and MKE side by side on delays, cancellations, and reliability.

Compare BWI vs MKE

Origin-hub reliability standing

Mid-pack among BWI departures

From BWI, this corridor sits with 53 other 75–85% on-time routes out of 64 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 11 below 75%). Destination: Milwaukee · fleet on-time rank #4238 of 4927.

What the Data Says About BWI to MKE

The Baltimore to Milwaukee corridor (BWI to MKE) posts a 76.3% on-time rate on the lower edge of the average band, based on 4,551 tracked flights. Late flights run 57.6 minutes behind on average. 3 carriers cover the 641-mile route; over the last 24 months, 18 of 1,740 flights were cancelled (1.0%) and 0.1% diverted.

The monthly split is wide on this route: Sep 2025 posted the strongest performance at 92% on-time, while Jul 2024 came in at just 60% - a 32-point swing worth factoring into travel timing.

On the multi-year calendar, BWI–MKE peaks in February at 84.4% on-time while August carries the heaviest traffic (~82 flights per month) ; the softest month is July at 67.6%, a 16.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does BWI to MKE rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, BWI to MKE ranks #2656 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from BWI to MKE? ▼
Flights from Baltimore to Milwaukee have a 76.3% on-time rate based on 4,551 flights. The average delay is 57.6 minutes. The best recent month was Sep 2025 with 92% on-time.
What is the cancellation rate for BWI to MKE? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (18 of 1,740 flights) and 0.1% were diverted.
How far is the flight from BWI to MKE? ▼
The flight distance from Baltimore (BWI) to Milwaukee (MKE) is approximately 641 miles. This route is served by 3 carriers.
When is the best time to fly from BWI to MKE? ▼
The best recent month for on-time performance was Sep 2025 (92% on-time). The worst was Jul 2024 (60% on-time). Consider booking during months with historically better performance.

Airports on this route

BWI Airport

Baltimore
MKE Airport

Milwaukee
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using BWI–MKE data

BWI–MKE is mid-pack at 76.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare BWI and MKE airport profiles: delay causes and top routes differ even on the same corridor. BWI airport
  • If your dates flex, February (84.4% on-time) beats July (67.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 76.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.