Route Reliability
Boise → Chicago
BOI–MDW · 1,448 miles · Boise Airport to Chicago Midway International Airport
86
Pretty Reliable
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 0%
- Cancelled
- 78
- Flights in the data
Data through May 2026.
Southwest Airlines is the only airline in this data on this route, arriving on time 83% of the time across 78 flights. No comparison to make.
What the data says
Departure time hasn't mattered much.
On-time rates stay between 82% and 83% across the day.
Thursdays have been rough.
BOI–MDW flights arrived on time 94% of the time on Mondays and just 78% on Thursdays. That gap is worth planning around.
Flights on this route
The breakdown
- Mon94%(16 flights)
- Tue—(0 flights)
- Wed—(0 flights)
- Thu78%(18 flights)
- Fri82%(17 flights)
- Sat—(9 flights)
- Sun82%(17 flights)
- 12–3 PM83%(60 flights)
- 3–6 PM82%(17 flights)
77%
Sep
Jun 75% → Sep 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 75% | 20 |
| July 2025 | 95% | 21 |
| August 2025 | 83% | 18 |
| September 2025 | 77% | 17 |
Same trip, other airports
Keep nerding
Based on 78 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.