If you've flown out of O'Hare airport anytime within the last say 24 years you may have wondered this, when looking at directional signs, of "Why isn't there a terminal 4?"

The numbers go from terminals 1, 2, 3 and skip to 5. Where is terminal 4?

WGN caught up with "David Woodcock, the airport's international terminal airline representative, to find out."

The reason for no Terminal 4 is this international flights got busier and busier at O'Hare and they had to build a new Terminal just for international flights.

You see there was a Terminal 4. Between 1985 and 1993 Terminal 4 was temporarily set up to expedite international flights.

As international flights got busier, Terminal 4 was used as the departure gates for international flights, while the city built a new Terminal, number 5, to be the area for arrivals on international flights.

However, those flights continued to increase and it just made more sense to had both arrivals and departures contained in the same terminal, number 5.

Plus, they realized having two Terminal 4's would be confusing to travelers. The airport did away with Terminal 4 and that's why the Terminal numbers jump over 4 go straight to 5.

Currently, the remains of what was Terminal 4 is where "the bus shuttle center across from the Hilton Hotel, attached to the short-term parking garage."

They say that if you "look closely around the airport, you may be able to spot old relics of the temporary terminal that once was."

Well the mystery has been solved.

I didn't know this did you?

Interesting to say the least.

Now in a couple of weeks when I fly to Memphis for the St. Jude conference I'll have something to look for and entertain myself while waiting for me flight.