Route Reliability
Boston → Chicago
BOS–ORD · 867 miles · Boston Logan International Airport to Chicago O'Hare International Airport
- 73%
- Arrive within 15 minutes
- 14 min
- Average arrival delay
- 2.7%
- Cancelled
- 7,556
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines75%2,631 flights
- 2.JetBlue Airways75%536 flights
- 3.American Airlines74%3,074 flights
- 4.Delta Air Lines66%1,315 flights
What the data says
Morning flights do better here.
BOS–ORD flights departing between 3–6 AM arrived on time 91% of the time, versus 49% between 6–9 PM.
Tuesday comes out ahead.
A small edge: 76% on time on Tuesdays against 69% on Sundays.
United Airlines runs this route best.
United Airlines arrived on time 75% of the time on this route; Delta Air Lines managed 66%.
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
- Mon72%(1089 flights)
- Tue76%(997 flights)
- Wed76%(1001 flights)
- Thu72%(1103 flights)
- Fri73%(1115 flights)
- Sat73%(878 flights)
- Sun69%(1131 flights)
- 3–6 AM91%(145 flights)
- 6–9 AM88%(1873 flights)
- 9 AM–12 PM83%(1239 flights)
- 12–3 PM78%(1171 flights)
- 3–6 PM61%(1819 flights)
- 6–9 PM49%(1065 flights)
- 9 PM–12 AM—(2 flights)
Jun 74% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 663 |
| July 2025 | 70% | 643 |
| August 2025 | 75% | 663 |
| September 2025 | 68% | 655 |
| October 2025 | 65% | 688 |
| November 2025 | 72% | 613 |
| December 2025 | 70% | 552 |
| January 2026 | 71% | 467 |
| February 2026 | 83% | 465 |
| March 2026 | 72% | 553 |
| April 2026 | 78% | 620 |
| May 2026 | 80% | 732 |
Same trip, other airports
Keep nerding
Based on 7,556 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.