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Flight Reliability

UA 6213 · United Airlines

St. Louis → Houston (STL–IAH)81% of its flights flew this route. The rest (SBN–IAD, MSY–IAD) are included in these numbers.

82
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
7 min
Average arrival delay
1.0%
Cancelled
13 min early
Median arrival delay

Based on 299 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

UA 6213 departing between 12–3 PM arrived on time 94% of the time, versus 78% between 9 AM–12 PM.

Saturdays have been rough.

UA 6213 arrived on time 88% of the time on Sundays and just 72% on Saturdays. That gap is worth planning around.

A bit behind the STL–IAH route.

UA 6213 arrived on time 79% of the time, versus 83% across the STL–IAH route.

Slipping a little lately.

UA 6213 arrived on time 72% of the time over the last three months in the data, compared with 77% in the three months before that.

The breakdown

On-time by weekday
  • Mon77%(43 flights)
  • Tue76%(46 flights)
  • Wed87%(45 flights)
  • Thu76%(45 flights)
  • Fri78%(45 flights)
  • Sat72%(29 flights)
  • Sun88%(42 flights)
On-time by departure window
  • 9 AM–12 PM78%(274 flights)
  • 12–3 PM94%(16 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
77%
May

Jun 68% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%28
July 202584%31
August 202580%25
September 202592%26
October 202593%27
November 202596%27
December 202589%27
January 202645%29
February 202655%11
April 202683%30
May 202677%31
Departures on time
82%
Diverted
0.3%
Flights flown
295
Months covered
12

Same route, other flights

Keep nerding

Based on 299 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.