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Flight Reliability

DL 437 · Delta Air Lines

Los Angeles → Boston (LAX–BOS)

73
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
20 min
Average arrival delay
1.2%
Cancelled
3 min early
Median arrival delay

Based on 341 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 437 departing between 3–6 PM arrived on time 78% of the time, versus 69% between 12–3 PM.

Skip Wednesday if you can.

DL 437 arrived on time 82% of the time on Tuesdays. On Wednesdays: 71%.

A bit behind the LAX–BOS route.

DL 437 arrived on time 75% of the time, versus 79% across the LAX–BOS route.

A bit behind the Delta Air Lines network.

DL 437 arrived on time 75% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon78%(49 flights)
  • Tue82%(49 flights)
  • Wed71%(49 flights)
  • Thu73%(48 flights)
  • Fri72%(47 flights)
  • Sat75%(47 flights)
  • Sun75%(48 flights)
On-time by departure window
  • 9 AM–12 PM76%(25 flights)
  • 12–3 PM69%(110 flights)
  • 3–6 PM78%(202 flights)
On-time trend by month
80%
May

Jun 87% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202590%30
August 202587%31
September 202573%30
October 202562%29
November 202566%29
December 202569%13
January 202662%29
February 202678%27
March 202674%31
April 202668%28
May 202680%30
Departures on time
75%
Diverted
0%
Flights flown
337
Months covered
12

Same route, other flights

Keep nerding

Based on 341 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.