BOS to ORD flight delays & on-time performance
Nonstop flights from Boston Logan International Airport to Chicago O'Hare International Airport · 867 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BOS or ORD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Boston (BOS) to Chicago (ORD) arrived on time 73% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3% were cancelled, and 12% arrived an hour or more late.
- Envoy Air was the most punctual airline here (77% on time); Delta Air Lines was the least (66%).
- Departures scheduled around 6am did best (93% on time); around 7pm did worst (46%).
- Wednesday was the most reliable day to fly (76% on time) and Sunday the least (69%).
- The largest source of delay minutes was late-arriving aircraft (40%).
Which airline is most on time from BOS to ORD?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Envoy AirRegional airline operating American Eagle flights. | 77% | 3.4% | 24 min | 11.3% | 442 |
| United Airlines | 76% | 2.0% | 22 min | 9.4% | 2,733 |
| American Airlines | 73% | 3.0% | 26 min | 13.2% | 2,155 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 71% | 6.0% | 24 min | 12.8% | 906 |
| JetBlue | 70% | 2.8% | 23 min | 12.5% | 544 |
| Delta Air Lines | 66% | 3.4% | 26 min | 14.6% | 970 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am90%157 flights
- 6am93%624 flights
- 7am82%910 flights
- 8am89%457 flights
- 9am85%420 flights
- 10am82%418 flights
- 11am78%406 flights
- 12pm80%787 flights
- 1pm78%322 flights
- 2pm75%148 flights
- 3pm64%643 flights
- 4pm60%781 flights
- 5pm54%536 flights
- 6pm55%428 flights
- 7pm46%425 flights
- 8pm55%286 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%6.3% cancelled
- Tuesday75%3.6% cancelled
- Wednesday76%2.1% cancelled
- Thursday74%1.9% cancelled
- Friday73%2.4% cancelled
- Saturday73%1.6% cancelled
- Sunday69%3.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft40%
- Air traffic control & airport congestion36%
- Airline (crew, maintenance, cleaning, fueling)21%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather65%
- Air traffic control & airport congestion23%
- Airline (crew, maintenance, cleaning, fueling)12%
- Security0%
BOS to ORD: common questions
- How often are BOS to ORD flights on time?
- 73% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Boston to Chicago cancelled?
- 3.0% of scheduled flights were cancelled (236 of 7,750).
- How long are typical delays?
- Across all flights the average arrival delay was 24 min (early arrivals count as zero). Flights that were late arrived 86 min behind schedule on average, and 11.8% of flights were an hour or more late.
- How long is taxi time at BOS?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ORD to BOS — 68% on time
More flights from Boston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BOS → ORD, nonstop flights by US airlines that report to the DOT. How we calculate this.