How do you know that Joe Schmuck's Travel Service or your favorite on-line ticket site (e.g. Nwa.Com, Orbitz, Expedia) is providing the best deal you can get? This site provides a utility which seems to be really good at figuring out all possible combinations at getting from airport A to airport B, and which combinations are the cheapest, provided that you have a general idea as to what airlines serve your city:
http://beta.itasoftware.com/ or
http://matrix.itasoftware.com/cvg/dispatch/
You tell it how many connections and (optionally) exactly what airline you want to fly each leg on, and it does the searching.
It also warns you about things that might go unnoticed when you book your flight: long layovers, short connection times & airport switches (e.g. arriving at TRF -- Sandefjord -- but leaving from OSL -- Gardermoen).
The examples below are contructed for an imaginary OAS alumna who lives near Boise, Idaho, and participates in Alaskan Airlines' frequent flyer program.
Alaskan relies primary on Northwest/KLM for most European flights, for which she must first fly to Minneapolis. Alternatively, she can fly Alaskan to Seattle or other western cities and then continue on Northwest. All Northwest flights to Oslo have connections in Europe (usually Amsterdam), so she must plan total of 3 connections each way.
All of the examples below assume 1 adult, departure 7/15/05, return 7/31/05.
To search for fares via Minneapolis (Northwest all the way), she would enter the origin and destination as:
From BOI::NW NW NW
To OSL::NW NW NW
It returns 500 possible routing combinations with fares starting at $1,031.
To check out the possibilities using Alaskan for the leg in & out of Boise, enter the origin and destination as:
From BOI::AS NW NW
To OSL::NW NW AS
It returns 500 possible routing combinations with fares starting at $1,269.
If you don't care what airline(s) you fly on, use X's instead of the two letter codes:
From BOI::X X X
To OSL::X X X
It gets dumber and returns 500 combinations with fares starting at $1,385.
There's a lot of other stuff you can do with this utility, just click on its
Help option at the top right of its display for more info.
What it can't do, unfortunately, is sell you the ticket. For that, you still need your travel agent or on-line ticket site.