Online Travel Booking and Bidding Agencies - How do I force a layover in a certain city?

I'm using Kayak, and trying to book ORD - PER.
I'd like a layover in BangKok, but the computers are putting me in Hong Kong, or Sydney.

Any way to force a Bangkok layover without performing a multi-city booking? Multi-City is more expensive.

Click on "Layover Airports" on the left side.

Bankok isn't listed there.

Actually, BKK is listed there, but when I select it, and only it, the resulting set of flights is none.

You may have to buy separate tickets to get this to work.

It looks like BKK-PER nonstop service is not daily (I see it scheduled Sunday thru Wednesday right now) and is only on Thai. Does TG or anyone who codeshares with them publish an ORD-PER fare that permits stopovers in BKK?

To answer my own question: yes! They do! You can get a TG QLAPOW fare from CHI to PER that connects in BKK.

Here's how to do it with a 1 hour layover in BKK:
http://i.imgur.com/FNOql.png

And here's how I found that on ITA (and how you can find other itineraries that may fit your needs more exactly, by looking through the other alternative flights it finds):
http://i.imgur.com/4cgLX.png

how do you make that work for a round trip? When I did my search on ITA it was pricing out a round trip in economy around 4k
When I looked on the Matrix, it showed that United did both segments (ORD-BKK and BKK-PER), Thai airways didn't come up.

what does the f+ bkk mean? forced stopover?

how do you make that work for a round trip? When I did my search on ITA it was pricing out a round trip in economy around 4k
When I looked on the Matrix, it showed that United did both segments (ORD-BKK and BKK-PER), Thai airways didn't come up.

what does the f+ bkk mean? forced stopover?

It's worth having a look at the "ITA route language".

In this case, I asked for a one-way ticket from ORD to PER, and I said that I want the following routing: "please give me one or more flights, followed by a flight to BKK, and then please take me to my destination".

Compare: ORD ":: F* BKK F*" PER would mean "please give me zero or more flights, followed by a flight to BKK, followed by zero or more flights that eventually get me to PER".

^ for ITA screenshot...it was very helpful!

You could also try a multi city search putting in your layover choice as one of the destinations. Instead of searching

A > C and hoping it's going to route you through B

search instead for

A > B then B > C in a multicity.

It may or may not work, sometimes it does horrific things to the pricing.