ORD to BOS flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Boston Logan International Airport · 867 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or BOS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Boston (BOS) arrived on time 68% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3% were cancelled, and 14% arrived an hour or more late.
- Envoy Air was the most punctual airline here (83% on time); American Airlines was the least (60%).
- Departures scheduled around 6am did best (90% on time); around 3pm did worst (48%).
- Saturday was the most reliable day to fly (74% on time) and Monday the least (64%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from ORD to BOS?
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. | 83% | 2.5% | 13 min | 6.5% | 441 |
| JetBlue | 72% | 3.3% | 28 min | 13.0% | 545 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 70% | 5.7% | 24 min | 11.9% | 908 |
| Delta Air Lines | 69% | 3.4% | 28 min | 15.3% | 970 |
| United Airlines | 69% | 2.0% | 25 min | 13.8% | 2,735 |
| American Airlines | 60% | 3.0% | 31 min | 18.1% | 2,156 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am90%574 flights
- 7am85%979 flights
- 8am80%399 flights
- 9am82%491 flights
- 10am73%621 flights
- 11am64%573 flights
- 12pm64%156 flights
- 1pm59%614 flights
- 2pm61%349 flights
- 3pm48%516 flights
- 4pm55%325 flights
- 5pm54%357 flights
- 6pm60%444 flights
- 7pm58%661 flights
- 8pm56%470 flights
- 9pm68%223 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday64%6.0% cancelled
- Tuesday70%3.5% cancelled
- Wednesday69%1.2% cancelled
- Thursday66%2.9% cancelled
- Friday67%1.7% cancelled
- Saturday74%1.5% cancelled
- Sunday66%3.9% 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 aircraft43%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)19%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather68%
- Air traffic control & airport congestion20%
- Airline (crew, maintenance, cleaning, fueling)12%
- Security0%
ORD to BOS: common questions
- How often are ORD to BOS flights on time?
- 68% 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 Chicago to Boston cancelled?
- 3.0% of scheduled flights were cancelled (234 of 7,755).
- How long are typical delays?
- Across all flights the average arrival delay was 27 min (early arrivals count as zero). Flights that were late arrived 80 min behind schedule on average, and 14.5% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 27 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BOS to ORD — 73% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → BOS, nonstop flights by US airlines that report to the DOT. How we calculate this.