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Route Reliability

Baltimore → Boston

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

71
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
10 min
Average arrival delay
2.8%
Cancelled
3,613
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 Lines81%1,083 flights
  2. 2.Southwest Airlines73%2,381 flights
  3. 3.Spirit Airlines66%149 flights

What the data says

Morning-you made the right choice.

BWI–BOS flights departing between 3–6 AM arrived on time 96% of the time, versus 58% between 9 PM–12 AM.

Sunday scaries are real for this one.

BWI–BOS flights arrived on time 81% of the time on Saturdays. On Sundays: 70%.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 81% of the time on this route; Spirit Airlines managed 66%.

Slipping a little lately.

BWI–BOS flights arrived on time 76% of the time over the last three months in the data, compared with 80% 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
  • Mon71%(520 flights)
  • Tue78%(503 flights)
  • Wed77%(499 flights)
  • Thu72%(519 flights)
  • Fri75%(531 flights)
  • Sat81%(416 flights)
  • Sun70%(521 flights)
On-time by departure window
  • 3–6 AM96%(24 flights)
  • 6–9 AM93%(795 flights)
  • 9 AM–12 PM88%(690 flights)
  • 12–3 PM68%(561 flights)
  • 3–6 PM59%(598 flights)
  • 6–9 PM64%(525 flights)
  • 9 PM–12 AM58%(316 flights)
On-time trend by month
74%
May

Jun 68% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%351
July 202570%347
August 202579%314
September 202561%284
October 202569%333
November 202585%276
December 202574%269
January 202684%226
February 202684%214
March 202676%257
April 202679%323
May 202674%315

Same trip, other airports

Keep nerding

Based on 3,613 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.