My trip
Plan a trip
Tell FlyerIntel where and when you are flying. It will show how that route actually performs at that time of day and on that day of the week, what both airports are doing right now, and when to get to the airport.
ORD → BOS
Chicago to Boston · departing 8:40 AM
ORD → BOS flights departing 5–9 AM arrive on time 87.2% of the time, against 72.4% across the whole day — your departure window is 14.8 points better than average for this route.
Your slot
Add a date above to see how that hour has done on your day of the week, and what a nearby slot would change.
Other times on ORD → BOS
Time of day
5–9 AM is among the most reliable times to leave on ORD → BOS: 87.2% on time.
- 5–9 AM87.2%
- 9 AM–12 PM77.6%
- 12–3 PM67.6%
- 3–6 PM58.8%
- 6–9 PM62.1%
- 9 PM–5 AM68.7%
Day of week
- Monday71.4%
- Tuesday75.3%
- Wednesday74.3%
- Thursday69.5%
- Friday68.2%
- Saturday79.0%
- Sunday70.4%
Bars start below the lowest figure so a real gap is visible; read the percentage, not the bar length. A time with too few flights to score is left unscored rather than guessed at.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · History describes what has happened on this route. It is not a prediction about your flight. Full route profile →
Which flight
Flights on ORD → BOS, the ones scheduled closest to 8:40 AM first.
Within 90 minutes of 8:40 AM, UA1117 (usually 9:15 AM) has the best record: 84.8% on time and 0.00% cancelled over 145 flights, against 72.4% on time for ORD → BOS as a whole.
| Flight | Usually departs | On time | Cancelled |
|---|---|---|---|
| B6312JetBlueLive map | 8:40 AM | 79.2% | 1.47% |
| UA1117United AirlinesLive map | 9:15 AM35 min away | 84.8% | 0.00% |
| DL2828Delta Air LinesLive map | 7:00 AM100 min away | 87.4% | 6.36% |
| UA1606United AirlinesLive map | 10:25 AM105 min away | 80.9% | 0.85% |
| MQ4106Envoy AirLive map | 6:25 AM135 min away | 90.3% | 0.00% |
| UA1693United AirlinesLive map | 1:55 PM315 min away | 63.3% | 2.59% |
| UA2466United AirlinesLive map | 3:55 PM435 min away | 49.5% | 1.98% |
| YX4384Republic AirwaysLive map | 4:02 PM442 min away | 66.7% | 6.09% |
| AA1461American AirlinesLive map | 5:25 PM525 min away | 55.8% | 2.22% |
| AA3107American AirlinesLive map | 7:10 PM630 min away | 57.7% | 1.05% |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Showing 10 of 12 flight numbers. “Usually departs” is the scheduled time each flight number most often had over the period; airlines retime flights, so confirm the time on your booking. Flight numbers with fewer than 90 operations on this route are left out. This is history, not a forecast for your flight.
When to get to the airport
A starting point for ORD, not a promise about your day.
2h 20m before your 8:40 AM departure
How this was worked out
- FlyerIntel cannot currently obtain live security wait times for ORD, so this figure does not account for the queue on the day.
- It does not include your journey to the airport, parking, or a shuttle from a remote lot.
- International departures, and travel with children, checked pets or special assistance, need more time.
Both airports right now
Aviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedAviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedSource: NOAA Aviation Weather Center · Conditions describe the airfield, not your flight, and change quickly.
Other ways to make this journey
Airport pairings serving Chicago to Boston.
Who flies this route
Performance by the carrier that actually operates the flight.
| Carrier | Flights | On time | Cancelled | Median delay |
|---|---|---|---|---|
| United Airlines | 7,618 | 74.5% | 1.50% | -5 min |
| American Airlines | 5,434 | 64.9% | 1.95% | 1 min |
| Delta Air Lines | 2,911 | 72.2% | 2.06% | -7 min |
| Republic Airways | 2,408 | 76.6% | 3.16% | -7 min |
| JetBlue | 1,825 | 72.8% | 1.92% | -8 min |
| Envoy Air | 1,423 | 84.7% | 1.48% | -10 min |