Really?
I just plugged random dates into expedia

Tue 4 Dec 2007
Los Angeles (LAX)
Depart 7:05 pm
Terminal 4 to London (LHR)
Arrive 1:30 pm +1 day
Terminal 3 8,758 km(5,442 mi)
Duration: 10hr 25min
AA American Airlines
Flight: 136
Economy/Coach Class, Boeing 777

Wed 5 Dec 2007
London (LHR)
Depart 4:00 pm
Terminal 1 to Istanbul (IST)
Arrive 9:45 pm
Terminal INTERNATIONAL TERMINAL
2,515 km(1,563 mi)
Duration: 3hr 45min
AA American Airlines
Flight: 6465
Operated by: BRITISH AIRWAYS
Economy/Coach Class, Snack, Airbus A320

Mon 10 Dec 2007
Istanbul (IST)
Depart 9:10 am
Terminal INTERNATIONAL TERMINAL to London (LHR)
Arrive 11:20 am
Terminal 1
2,515 km (1,563 mi)
Duration: 4hr 10min
BA British Airways
Flight: 675

Mon 10 Dec 2007
London (LHR)
Depart 4:30 pm
Terminal 3 to Chicago (ORD)
Arrive 7:20 pm
Terminal 5 INTERNATIONAL
6,362 km (3,953 mi)
Duration: 8hr 50min
AA American Airlines
Flight: 91
Economy/Coach Class, Boeing 777

Chicago (ORD)
Depart 8:35 pm
Terminal 3 to Los Angeles (LAX)
Arrive 11:05 pm
Terminal 4
2,803 km
(1,742 mi)
Duration: 4hr 30min
AA American Airlines
Flight: 693

1 adult C$389.00
Taxes & Fees C$299.88
Booking Fee C$9.00
Total C$697.88