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Route Reliability

Denver → Boston

DEN–BOS · 1,754 miles · Denver International Airport to Boston Logan International Airport

74
Usually Fine
WanderNerd Reliability Score
72%
Arrive within 15 minutes
12 min
Average arrival delay
1.2%
Cancelled
3,911
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines77%1,916 flights
  2. 2.Delta Air Lines76%415 flights
  3. 3.JetBlue Airways71%675 flights
  4. 4.Southwest Airlines61%905 flights

What the data says

Morning flights do better here.

DEN–BOS flights departing between 6–9 AM arrived on time 88% of the time, versus 47% between 6–9 PM.

Thursday is the weak spot.

DEN–BOS flights arrived on time 84% of the time on Saturdays. On Thursdays: 69%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 77% of the time on this route; Southwest Airlines managed 61%.

Recent months have been rougher.

DEN–BOS flights arrived on time 75% of the time over the last three months in the data, compared with 83% 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
  • Mon70%(572 flights)
  • Tue71%(522 flights)
  • Wed72%(555 flights)
  • Thu69%(582 flights)
  • Fri72%(588 flights)
  • Sat84%(460 flights)
  • Sun71%(582 flights)
On-time by departure window
  • 12–3 AM—(2 flights)
  • 6–9 AM88%(453 flights)
  • 9 AM–12 PM74%(1102 flights)
  • 12–3 PM66%(741 flights)
  • 3–6 PM67%(813 flights)
  • 6–9 PM47%(202 flights)
  • 9 PM–12 AM82%(548 flights)
On-time trend by month
76%
May

Jun 69% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%381
July 202567%422
August 202573%395
September 202551%331
October 202561%342
November 202581%291
December 202586%301
January 202686%246
February 202678%247
March 202675%299
April 202674%284
May 202676%322

Keep nerding

Based on 3,911 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.