Skip to content
WanderNerd
Check a flight

Route Reliability

BIL → Portland

BIL–PDX · 679 miles · BIL Airport to Portland International Airport

93
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
1 min
Average arrival delay
0.6%
Cancelled
353
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 87% of the time across 353 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

BIL–PDX flights departing between 12–3 PM arrived on time 96% of the time, versus 85% between 3–6 PM.

Saturday is the weak spot.

BIL–PDX flights arrived on time 93% of the time on Sundays. On Saturdays: 80%.

Trending in the right direction.

BIL–PDX flights arrived on time 93% of the time over the last three months in the data, compared with 83% in the three months before that.

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
  • Mon87%(52 flights)
  • Tue92%(47 flights)
  • Wed91%(46 flights)
  • Thu84%(50 flights)
  • Fri85%(52 flights)
  • Sat80%(51 flights)
  • Sun93%(53 flights)
On-time by departure window
  • 12–3 PM96%(56 flights)
  • 3–6 PM85%(295 flights)
On-time trend by month
90%
May

Jun 70% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%30
July 202587%31
August 202587%31
September 202597%30
October 202590%31
November 202586%29
December 202574%31
January 202683%24
February 202692%24
March 202693%29
April 202697%30
May 202690%31

Keep nerding

Based on 353 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.