How long is the UA540 flight?

The timetable allows 4 h 4 min. San Diego to Chicago is 2,768 km (1,720 mi).

Which terminal does UA540 use?

It usually leaves from Terminal 2 at San Diego International Airport (SAN). Check the flight card above for today's terminal and gate.

What other flight numbers does UA540 have?

Also listed as UAL540 (United Airlines' ICAO code) and UA 540.

UA540 Flight Status United Airlines: San Diego to Chicago (UAL540)

United Airlines UA 540

Landed On Time

SAN San Diego

Scheduled: 22:30
Actual: 22:51

Terminal: 2 | Gate: 41

Departure: Sun, Nov 8, 2026 · local time PST

San Diego International Airport (SAN)

All SAN Departures >

ORD Chicago

Scheduled: 04:34
Actual: 04:32
Delay

Terminal: 2 | Gate: F16

Arrival: Mon, Nov 9, 2026 · local time CST

Chicago O'Hare International Airport (ORD)

All ORD Arrivals >

Landed 2h 56m ago 100%

SAN 22:51 ORD 04:32 ⁺¹

2,768 km (1,720 mi) flown

Estimated position based on departure and arrival times, not live tracking. Times are local at each airport.

Add to calendar

Distance: 2768 km / 1720 miles · Scheduled Duration: 04:04 · Actual Duration: 03:41

This flight started in Denver (DEN): UA540 Denver to San Diego departs at 19:05 local time on Nov 8.

UA 540 Flight Status & Schedule United Airlines San Diego to Chicago

Date	From	To	Departure	Arrival	Status	Details
Nov 08	SAN	ORD	22:51	04:32	Landed	Track >
Nov 07	SAN	ORD	22:37	04:15	Landed	Track >
Nov 06	SAN	ORD	22:41	04:22	Landed	Track >
Nov 05	SAN	ORD	22:39	04:07	Landed	Track >
Nov 04	SAN	ORD	23:06	04:22	Landed	Track >
Nov 03	SAN	ORD	22:35	03:49	Landed	Track >
Nov 02	SAN	ORD	22:40	04:03	Landed	Track >
Nov 01	SAN	ORD	22:48	04:06	Landed	Track >
Oct 31	SAN	ORD	22:41	02:51	Landed	Track >

United Airlines operates UA 540 from San Diego to Chicago, a 2,768 km (1,720 mi) trip, six times a week (Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday). With 4 h 4 min in the timetable and a usual flight time of about 3 h 25 min, it often makes up time. Yesterday it left 21 minutes late and still landed at 04:32 the next morning, 2 minutes early.

< All San Diego SAN Departures All Chicago ORD Arrivals >

About UA 540

Route: San Diego International Airport SAN to Chicago O'Hare International Airport ORD
Distance: 2,768 km (1,720 mi)
Typical flight time: 3 h 25 min
Flies: Tue, Wed, Thu, Fri, Sat, Sun
On time: 9 of the last 9
Usually departs from: Terminal 2

UA 540 FAQ

How long is the UA540 flight?: The timetable allows 4 h 4 min. San Diego to Chicago is 2,768 km (1,720 mi).
How often is UA540 late?: None of the last 9 flights arrived 15 or more minutes late.
Which days does UA540 fly?: Six times a week: Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday, based on the schedule of the last 7 days.
Which terminal does UA540 use?: It usually leaves from Terminal 2 at San Diego International Airport (SAN). Check the flight card above for today's terminal and gate.
What other flight numbers does UA540 have?: Also listed as UAL540 (United Airlines' ICAO code) and UA 540.

United Airlines UA540 News

Incident UA540 - United B738 near Grand Junction on Apr 28th 2021, loss of cabin pressure

UA540 and San Diego SAN to Chicago ORD Flights

Flight UA540 is code-shared by 1 airline using the flight number AC4266

Other flights departing from San Diego SAN: QX2249, OO3104, CM850

Other flights arriving at Chicago ORD: Y47820, Y4700, AA1494, 5Y825

All flights connecting San Diego SAN to Chicago ORD.