Fly from Chicago to Bangkok for $515 round-trip on China Eastern.
Searching Orbitz, we found seats departing ORD on October 4, returning from BKK on October 13. Flights connect via Beijing PEK.
Other dates are available for departures from late summer/fall travel. You'll find slightly higher fares on United.
See our Chicago ORD fare listings for booking info.
Need a room in Bangkok? Here's what's available for the above dates on Hotelwatchdog.