I was leaving Chicago today on a United Express flight. I am the woman that has the broken foot - you might have seen me this weekend at the Seminar. Anyway, left the hotel on the 11:00 shuttle, got to the airport by 11:20. United rep called for a wheelchair for me. Flight was at Terminal 2 Gate F11, which is downstairs and you walk to the plane. I was told they would get a ramp for me to walk up to the plane since I couldn't do the airplane stairs I was put in a chair and told that a wheel chair would take me outside at boarding time. We boarded the plane for our 1:17 flight and then we just sat, and sat. We were at first told that the pilot had just landed and would be over momentarily. That turned out to be a lie - the pilot never showed up. We were later told that a shift pilot would be coming in at 2:00 and he would come over and pilot the plane. Passengers were allowed to deplane around 1:45 because the plane was so hot. I wasn't allowed to get off since there wasn't a ramp available. Then all of a sudden another pilot came over. He had just landed and was asked during his 3 hour layover if he would fly us on our 37 minute flight to TVC. He agreed and we were all happy. Everyone came back on but during this time it started raining hard. We were waiting for a pushoff but it started lightning and the ground crew went inside. We sat for about 30 minutes. We then had to do an emergency evacuation as a tornado was spotted on the field. I was last off and they couldn't get a ramp for me three employees helped me off the plane and into the building where a wheelchair was called. I was brought upstairs as all passengers were told to go towards Chilis since there was a tornado warning. After about 20 minutes an announcement was made that the tornado warning had expired. Brought back downstairs to the gate. Again, last one to board as they had to get the ramp again. We were on board about 3:45. We didn't takeoff till 5:05 (CDT) as we were 47th in line. We arrived in TVC at 6:45 (EDT) and had to wait again as the pilot told us that the ground crew wasn't answering his phone calls (since Chicago). We had to wait for the crew to bring the jetway to our plane. Finally we got off the plane at 7:05 almost 4 hours after we should have landed. We had during the entire time, 2 bags of pretzels, one glass of water and a can of soda. Although this turned into a massive weather problem, it began with a personnel problem. All of this could have been avoided if a pilot showed up at the appointed time. So, what is reasonable compensation? Should I ask for miles, voucher or something else? How likely do you think they will react to all of this? Who do you suggest that I write the letter to? I do want to complement the pilot that did come on board, the FO who made the decision to let passengers off the first time since it was so hot, and the flight attendant who tried her best to keep us happy. I have all of their names. Sorry if this is too long but I did want to give the details.