ON TIMEBOARD
United Airlines / BOS → ORD

UA 1349 on time

United Airlines 1349: Boston to Chicago at 9:50 a.m.; Chicago to Pittsburgh at 2:25 p.m. (past 12 months). Figures below the title are for BOS → ORD, its busiest leg

On time
84%
308 flights · likely 79–87%
Cancelled
1.6%
of scheduled flights
Typical arrival
−11 min
median vs schedule
When late
+71 min
average delay
Similar flights
84%
UA, same route & hour

About 1 in 6 UA 1349 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (16%); 1.6% were cancelled. The typical flight landed 11 minutes early.

UA 1349: BOS → ORD

Scheduled to leave Boston at 9:50 a.m. local time. Over the past year it arrived on time 84% of the time (308 flights), in line with other UA flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Oct 2025: too few flights (6 flights)OctNov 2025: 77% on time (30 flights)77NovDec 2025: 90% on time (30 flights)90DecJan 2026: 67% on time (30 flights)67JanFeb 2026: 89% on time (28 flights)89FebMar 2026: 84% on time (31 flights)84MarApr 2026: 87% on time (30 flights)87AprMay 2026: 84% on time (31 flights)84MayJun 2026: 90% on time (30 flights)90JunJul 2026: 90% on time (31 flights)90JulAug 2026: 77% on time (31 flights)77Aug

By day of week

DayFlightsOn time
Monday4576%
Tuesday4484%
Wednesday4491%
Thursday4286%
Friday4491%
Saturday4484%
Sunday4576%

Why it was late

Air traffic & airport (NAS) 60%Airline (crew, maintenance, ops) 32%Late inbound plane 5%Severe weather 2%

All flights BOS → ORD · Connecting off UA 1349? Check the risk

UA 1349: ORD → PIT

Scheduled to leave Chicago at 2:25 p.m. local time. Over the past year it arrived on time 67% of the time (165 flights), in line with other UA flights on the route at that hour (68%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2026: 63% on time (19 flights)63MarApr 2026: 73% on time (26 flights)73AprMay 2026: 68% on time (28 flights)68MayJun 2026: 73% on time (30 flights)73JunJul 2026: 61% on time (31 flights)61JulAug 2026: 61% on time (31 flights)61Aug

By day of week

DayFlightsOn time
Monday2673%
Tuesday2572%
Wednesday2560%
Thursday2658%
Friday2268%
Saturday15—
Sunday2665%

Why it was late

Late inbound plane 46%Airline (crew, maintenance, ops) 29%Air traffic & airport (NAS) 19%Severe weather 6%

All flights ORD → PIT · Connecting off UA 1349? Check the risk

Questions

How often is UA 1349 from BOS to ORD late?

United Airlines 1349 from Boston, MA to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 16% of 308 scheduled flights between September 2025 and August 2026. 1.6% were cancelled.

How often is UA 1349 from ORD to PIT late?

United Airlines 1349 from Chicago, IL to Pittsburgh, PA arrived 15 or more minutes late, was diverted or was cancelled on 33% of 165 scheduled flights between September 2025 and August 2026. 1.8% were cancelled.

Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.