Boston (BOS) to Chicago (ORD)
Flight time
≈ 2h 32m
Bearing
274° W
Boston (BOS) to Chicago (ORD) is 864 miles (1,391 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BOS–ORD
Filed traffic dataIn July 2026, United Airlines operated the most departures, one of 6 carriers flying nonstop BOS–ORD; the Boeing 737-800 was the most common aircraft at 37% of departures; flights ran 86% full.
Departures
1,495
July 2026
Seats
242,487
both directions
Passengers
209,298
both directions
Load factor
86.3%
RPM ÷ ASM
Who flies BOS–ORD?
United Airlines operated the most nonstop BOS–ORD departures in July 2026 (590), one of 6 carriers on the route.
- UA
590 departures · 107,938 seats
Share of departures39.5%88.6%
Load
- AA
473 departures · 81,356 seats
Share of departures31.6%80.7%
Load
- DL
213 departures · 29,651 seats
Share of departures14.2%92.9%
Load
- B6
102 departures · 14,672 seats
Share of departures6.8%87.1%
Load
- MQ
60 departures · 4,549 seats
Share of departures4.0%90.8%
Load
- YX
57 departures · 4,321 seats
Share of departures3.8%80.8%
Load
What plane flies BOS–ORD?
In July 2026, the Boeing 737-800 flew 37% of BOS–ORD departures — more than any other aircraft type.
- Boeing 737-800
555 departures · 82.9% load
37.1% - Boeing 737 MAX 9
196 departures · 90.9% load
13.1% - Airbus A321neo
182 departures · 84.3% load
12.2% - Boeing 737-900ER
154 departures · 91.0% load
10.3% - Airbus A220-300
153 departures · 88.0% load
10.2% - Embraer E175
116 departures · 86.0% load
7.8% - Airbus A319
84 departures · 94.1% load
5.6% - Boeing 737 MAX 8
20 departures · 73.6% load
1.3% - Airbus A320
18 departures · 90.9% load
1.2% - Boeing 737-700
16 departures · 94.0% load
1.1% - Embraer E170
1 departures · 78.5% load
0.1%
How has BOS–ORD traffic changed?
Nonstop BOS–ORD departures rose from 1,334 in August 2025 to 1,495 in July 2026.
Monthly nonstop BOS–ORD traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
1,334 departures · 188,909 passengers
93.2%
Load
September 2025
1,310 departures · 176,373 passengers
86.8%
Load
October 2025
1,382 departures · 196,001 passengers
90.0%
Load
November 2025
1,222 departures · 144,373 passengers
83.7%
Load
December 2025
1,104 departures · 125,546 passengers
84.3%
Load
January 2026
936 departures · 95,797 passengers
83.2%
Load
February 2026
940 departures · 93,534 passengers
79.1%
Load
March 2026
1,124 departures · 127,987 passengers
86.1%
Load
April 2026
1,251 departures · 150,331 passengers
78.5%
Load
May 2026
1,469 departures · 185,347 passengers
79.2%
Load
June 2026
1,458 departures · 192,951 passengers
82.3%
Load
July 2026
1,495 departures · 209,298 passengers
86.3%
Load
By direction
Each direction is filed separately — they rarely match.
ORD → BOS
85.1% full
748 departures · 103,148 passengers
BOS → ORD
87.5% full
747 departures · 106,150 passengers
Nonstop BOS–ORD traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Boston (BOS) from Chicago (ORD)?
BOS to ORD is 864 miles (1,391 km / 751 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BOS to ORD?
A nonstop covers the 864-mile great-circle distance in roughly 2h 32m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BOS–ORD?
In July 2026, the Boeing 737-800 flew the largest share of departures (37.1%), followed by the Boeing 737 MAX 9 (13.1%).
What mileage do I earn flying BOS–ORD?
Distance-based programs credit off the 864-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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