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Route Reliability

Boston → Baltimore

BOS–BWI · 369 miles · Boston Logan International Airport to Baltimore/Washington International Thurgood Marshall Airport

76
Usually Fine
WanderNerd Reliability Score
79%
Arrive within 15 minutes
7 min
Average arrival delay
2.7%
Cancelled
3,605
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines82%1,083 flights
  2. 2.Southwest Airlines78%2,376 flights
  3. 3.Spirit Airlines66%146 flights

What the data says

Morning-you made the right choice.

BOS–BWI flights departing between 3–6 AM arrived on time 96% of the time, versus 46% between 9 PM–12 AM.

Sunday scaries are real for this one.

BOS–BWI flights arrived on time 85% of the time on Wednesdays and just 70% on Sundays. That gap is worth planning around.

Delta Air Lines has a clear lead on this route.

Delta Air Lines arrived on time 82% of the time on this route; Spirit Airlines managed 66%.

Slipping a little lately.

BOS–BWI flights arrived on time 82% of the time over the last three months in the data, compared with 86% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon75%(519 flights)
  • Tue85%(500 flights)
  • Wed85%(492 flights)
  • Thu79%(526 flights)
  • Fri78%(530 flights)
  • Sat79%(415 flights)
  • Sun70%(519 flights)
On-time by departure window
  • 3–6 AM96%(336 flights)
  • 6–9 AM91%(709 flights)
  • 9 AM–12 PM90%(489 flights)
  • 12–3 PM84%(672 flights)
  • 3–6 PM70%(685 flights)
  • 6–9 PM51%(465 flights)
  • 9 PM–12 AM46%(145 flights)
On-time trend by month
80%
May

Jun 69% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%350
July 202571%342
August 202582%313
September 202575%284
October 202571%334
November 202584%276
December 202580%272
January 202689%224
February 202689%210
March 202684%260
April 202680%321
May 202680%315

Same trip, other airports

Keep nerding

Based on 3,605 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.