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Route Reliability

Houston → San Diego

IAH–SAN · 1,303 miles · George Bush Intercontinental Airport to San Diego International Airport

86
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
2 min
Average arrival delay
0.5%
Cancelled
1,692
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 81% of the time across 1,692 flights. No comparison to make.

What the data says

Morning-you made the right choice.

IAH–SAN flights departing between 9 AM–12 PM arrived on time 89% of the time, versus 75% between 6–9 PM.

Skip Thursday if you can.

IAH–SAN flights arrived on time 88% of the time on Tuesdays. On Thursdays: 76%.

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
  • Mon79%(253 flights)
  • Tue88%(214 flights)
  • Wed86%(244 flights)
  • Thu76%(250 flights)
  • Fri80%(245 flights)
  • Sat83%(218 flights)
  • Sun78%(257 flights)
On-time by departure window
  • 6–9 AM88%(25 flights)
  • 9 AM–12 PM89%(338 flights)
  • 12–3 PM82%(381 flights)
  • 3–6 PM83%(341 flights)
  • 6–9 PM75%(596 flights)
On-time trend by month
83%
May

Jun 61% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202561%140
July 202569%138
August 202576%140
September 202590%136
October 202586%146
November 202580%142
December 202583%144
January 202684%127
February 202692%127
March 202687%150
April 202682%142
May 202683%149

Same trip, other airports

Keep nerding

Based on 1,692 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.