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Flight Reliability

WN 1870 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1870 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

73%
Arrive within 15 minutes
14 min
Average arrival delay
0.7%
Cancelled
1 min early
Median arrival delay

Based on 403 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(73 flights)
  • Tue87%(45 flights)
  • Wed80%(44 flights)
  • Thu67%(73 flights)
  • Fri67%(72 flights)
  • Sat67%(42 flights)
  • Sun76%(49 flights)
On-time by departure window
  • 6–9 AM97%(31 flights)
  • 9 AM–12 PM86%(78 flights)
  • 12–3 PM72%(124 flights)
  • 3–6 PM62%(93 flights)
  • 6–9 PM53%(49 flights)
  • 9 PM–12 AM87%(23 flights)
On-time trend by month
59%
May

Jun 70% → May 59% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%54
July 202562%53
August 202560%35
September 202580%30
October 202597%31
November 202589%18
December 202541%17
January 202687%30
February 202679%28
March 2026100%27
April 202664%36
May 202659%39
Departures on time
68%
Diverted
0.5%
Flights flown
398
Months covered
12

Keep nerding

Based on 403 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.