PlainFlights

Route · BOS → BWI · 2020–2025 BTS data

Boston to Baltimore

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BOS to BWI (Boston to Baltimore) ranks #354 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83.1%
On-time
+4.1 pts
vs US avg
70 min
Delay when late
19,555
Flights
#354 of 4927
Corpus placement

Cancelled

1.6%

Best Month

Jan 2025 92%

Worst Month

Jun 2025 69%

Distance

369 mi

Carriers

23

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 275 57 3 0 YX,WN
Nov 2025 290 46 14 0 WN,YX
Oct 2025 337 102 3 0 WN,YX
Sep 2025 288 71 4 0 WN,YX
Aug 2025 318 59 5 0 WN,YX,NK
Jul 2025 364 99 22 0 NK,WN,YX
Jun 2025 357 109 5 2 WN,YX,NK
May 2025 353 90 1 0 NK,WN,YX
Apr 2025 343 53 0 0 NK,WN,YX
Mar 2025 327 47 1 1 NK,WN,YX
Feb 2025 285 58 5 0 WN,YX,NK
Jan 2025 306 25 14 0 WN,YX,NK
Dec 2024 351 50 4 1 NK,WN,YX
Nov 2024 372 46 0 1 YX,NK,WN
Oct 2024 388 47 0 0 WN,YX,NK
Sep 2024 359 57 0 0 WN,YX,NK
Aug 2024 387 89 18 1 NK,WN,YX
Jul 2024 338 100 3 0 NK,WN,YX
Jun 2024 338 79 5 0 NK,WN,YX
May 2024 356 76 2 0 NK,WN,YX
Apr 2024 339 59 2 0 B6,WN,YX
Mar 2024 290 38 0 0 B6,YX,WN
Feb 2024 254 27 3 0 B6,WN,YX
Jan 2024 281 57 15 1 B6,WN,YX

BOS–BWI seasonal on-time pattern

Best: March (87.9%) · weakest: July (75.6%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 84.9%

Strongest calendar month

March

87.9% on-time · ~279 flights/mo

Busiest calendar month

August

~306 flights/mo avg

Weakest calendar month

July

75.6% on-time · ~295 flights/mo

Cancellation Rate

1.6%

129 of 7,896 flights

Diversion Rate

0.1%

7 of 7,896 flights

Explore origin & destination

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

BOS - Boston

Full on-time, delay-cause, and seasonal performance for Boston, MA.

BOS on-time profile

BWI - Baltimore

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

BWI on-time profile

Compare the two airports

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

Compare BOS vs BWI

Origin-hub reliability standing

Mid-pack among BOS departures

From BOS, this corridor sits with 49 other 75–85% on-time routes out of 60 tracked departures, not the hub's reliability leaders (6 at ≥85%) and not the softest ( 5 below 75%). Destination: Baltimore · fleet on-time rank #1905 of 4927.

What the Data Says About BOS to BWI

Bureau of Transportation Statistics records show Boston to Baltimore (BOS to BWI) running a 83.1% on-time rate over 19,555 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 70.3 minutes. The 369-mile corridor is served by 23 carriers, and over the last 24 months 1.6% of 7,896 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Jan 2025 posted the strongest performance at 92% on-time, while Jun 2025 came in at just 69% - a 22-point swing worth factoring into travel timing.

On the multi-year calendar, BOS–BWI peaks in March at 87.9% on-time while August carries the heaviest traffic (~306 flights per month) ; the softest month is July at 75.6%, a 12.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does BOS to BWI rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, BOS to BWI ranks #354 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 BOS to BWI? ▼
Flights from Boston to Baltimore have a 83.1% on-time rate based on 19,555 flights. The average delay is 70.3 minutes. The best recent month was Jan 2025 with 92% on-time.
What is the cancellation rate for BOS to BWI? ▼
Over the last 24 months, 1.6% of flights on this route were cancelled (129 of 7,896 flights) and 0.1% were diverted.
How far is the flight from BOS to BWI? ▼
The flight distance from Boston (BOS) to Baltimore (BWI) is approximately 369 miles. This route is served by 23 carriers.
When is the best time to fly from BOS to BWI? ▼
The best recent month for on-time performance was Jan 2025 (92% on-time). The worst was Jun 2025 (69% on-time). Consider booking during months with historically better performance.

Airports on this route

BOS Airport

Boston
BWI Airport

Baltimore
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 BOS–BWI data

BOS–BWI runs 4.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare BOS and BWI airport profiles: delay causes and top routes differ even on the same corridor. BOS airport
  • If your dates flex, March (87.9% on-time) beats July (75.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83.1% 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.