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Route Reliability

GUM → SPN

GUM–SPN · 129 miles · GUM Airport to SPN Airport

92
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
4 min early
Average arrival delay
1.9%
Cancelled
365
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 91% of the time across 365 flights. No comparison to make.

What the data says

Skip Saturday if you can.

GUM–SPN flights arrived on time 98% of the time on Tuesdays. On Saturdays: 86%.

Slipping a little lately.

GUM–SPN flights arrived on time 86% of the time over the last three months in the data, compared with 89% in the three months before that.

The breakdown

On-time by weekday
  • Mon88%(50 flights)
  • Tue98%(51 flights)
  • Wed86%(51 flights)
  • Thu90%(51 flights)
  • Fri96%(51 flights)
  • Sat86%(51 flights)
  • Sun94%(53 flights)
On-time by departure window
  • 6–9 AM92%(356 flights)
  • 12–3 PM—(1 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
94%
May

Jun 100% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%30
July 202594%31
August 2025100%31
September 202597%30
October 2025100%30
November 202580%30
December 202584%31
January 202690%31
February 202693%28
March 202681%31
April 202683%24
May 202694%31

Keep nerding

Based on 365 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.