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 May 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 32% of departures; flights ran 79% full.
Departures
1,469
May 2026
Seats
234,117
both directions
Passengers
185,347
both directions
Load factor
79.2%
RPM ÷ ASM
Who flies BOS–ORD?
United Airlines operated the most nonstop BOS–ORD departures in May 2026 (537), one of 6 carriers on the route.
- UA
537 departures · 99,161 seats
Share of departures36.6%78.9%
Load
- AA
509 departures · 83,200 seats
Share of departures34.6%77.9%
Load
- DL
219 departures · 29,852 seats
Share of departures14.9%84.1%
Load
- B6
100 departures · 14,000 seats
Share of departures6.8%75.7%
Load
- YX
82 departures · 6,232 seats
Share of departures5.6%84.2%
Load
- MQ
22 departures · 1,672 seats
Share of departures1.5%78.8%
Load
What plane flies BOS–ORD?
In May 2026, the Boeing 737-800 flew 32% of BOS–ORD departures — more than any other aircraft type.
- Boeing 737-800
477 departures · 78.5% load
32.5% - Airbus A319
222 departures · 81.4% load
15.1% - Airbus A321neo
188 departures · 77.4% load
12.8% - Boeing 737-900ER
178 departures · 80.4% load
12.1% - Airbus A220-300
153 departures · 77.3% load
10.4% - Boeing 737 MAX 9
109 departures · 79.7% load
7.4% - Embraer E175
104 departures · 83.0% load
7.1% - Boeing 737 MAX 8
30 departures · 82.4% load
2.0% - Airbus A320
4 departures · 66.3% load
0.3% - Airbus A220-100
4 departures · 85.3% load
0.3%
How has BOS–ORD traffic changed?
Nonstop BOS–ORD departures rose from 1,330 in June 2025 to 1,469 in May 2026.
Monthly nonstop BOS–ORD traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
1,330 departures · 182,805 passengers
90.2%
Load
July 2025
1,302 departures · 182,518 passengers
92.5%
Load
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
By direction
Each direction is filed separately — they rarely match.
ORD → BOS
81.5% full
736 departures · 95,419 passengers
BOS → ORD
76.9% full
733 departures · 89,928 passengers
Nonstop BOS–ORD traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 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 May 2026, the Boeing 737-800 flew the largest share of departures (32.5%), followed by the Airbus A319 (15.1%).
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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