What is the longest time you have spent at an airport?

Over 24 hours in Anchorage. I got bumped from my flight since I was employee and they needed more seats. One flight out a day to New York City. Was with a couple friends and one of their mothers. We had nowhere to go so we spent the night sleeping in the crew room.  LOL  What a surprise the pilots got when they got there in the morning.

SFO to Calcutta -- 22 hours in Singapore.  But it was nice as we took a tour of the city, had a drink at the Raffles Hotel.  They also had small sleeping "pods" to take a nap and great food as well as a movie theater.

One of the highlights of the airport are the flowers. Orchids or all kinds and hundreds of them.

I got stuck in O'Hare Airport in Chicago for 17 and half hours on my way from Philly to Portland.

Overnight layover in Changi Airport Singapore (from KLIA) before flying to Narita International Airport; the end destination being Minneapolis−Saint Paul International Airport...

When i arrived to Madrid Spain, i was taken to an office for two hours and they made so many questions, cause they thought i would stay, and i had bought a tour around Europe.

Nine hours instead of two hours in Dallas because of a snowstorm in Chicago.

8 hours flight cancelled due to bad weather

14 .5 hours Fairbanks  Alaska with 2 children under 5.  The only place to eat closed 30 min after we got there and didn't open till after we left.

Hello and this is kind of a loaded question for me....As I have spent several day(s) at a time in several different airports.

I was just interviewed on the Ask Altucher Podcast Ep#291 about living location independent...which means staying in airports when needed, for extended periods of time.

2.5 days Chicago Airport Winter 2008.

You haven't lived until your X-mas celebration is a dirty sock hung over the back of a chair airport gate area with a Wall-E CD stuffed inside.

We had an intentional 24 layover at Incheon International Airport because we were planning on a whirlwind trip to old home, Jeonju to stuff our faces until we could hardly move. Once that mission was accomplished, we had to take the last bus of the day (11PM) and arrived back to Incheon by 2AM to an absolutely dark/pitch black/I didn't know any part of S. Korea got this dark bus station in Incheon. Thank the lord there were 2 taxis just hanging out all night and one of them took us to the airport (20 minute drive - usually 50+ minutes) on deserted highways. We love Incheon airport and were there from about 3AM to 9AM. Lots of stuff to do there, but nothing opens up until 7-8AM. I think now they have more on-site facilities for day rooms now. 

11 hours. I missed my flight and had to wait on standby for another one. Three flights later, they found enough space to accommodate me.

due to multiple, and I mean no fewer than 5 flight changes, I ended up in Newark airport overnight, for a total of 12 hours. by the end of this particular trip, it had taken me 24 hours to get from my original destination to home.

4 hrs. Was always lucky to find accomodations and/or hotel

Nine Long Hours!

Flew standby to Hawaii from New York. We we stuck in Los Angeles International Airport for 22 hours.

As a kid, we used to go skiing every year.  Back then, airlines still offered free tickets to anywhere in the United States if they had overbooked the flight, and you agreed to be bumped.  We used to do this every year in order to get free tickets for the next year, and most of the time we only had to wait a few hours to catch another flight.  However, one time, we actually had to spend the night in the Denver International Airport.  We were probably in the airport for about 15 or 16 hours.