context: The story takes place during one long night during a sudden blizzard at Lincoln International, a fictional Chicago airport based very loosely on O'Hare International Airport.The action mainly centers on Mel Bakersfeld (Burt Lancaster), the airport general manager. His devotion to his job is tearing apart his family and his marriage to his constantly angry and domineering wife Cindy (Dana Wynter), who resents his use of his job at the airport as a device to avoid going to various after-hours events she wants him to participate in, as she attempts to climb into the social circles of Chicago's elite. His problems in his marriage are further exacerbated by his romantically-charged friendship with a lovely divorcee, Trans America Airlines (TGA) passenger relations manager Tanya Livingston (Jean Sebrig).The movie centers on Bakersfeld's struggles to keep the airport open during the snowstorm. His chief problem is the unexpected closure of primary Runway two zero, caused when a landing airliner turns off past the wrong side of a runway marker light, burying the plane's landing gear in the snow, and blocking the runway. Bakersfield is forced to call upon Joe Patroni (George Kennedy), the tough and practical head of maintenance operations for Trans World Airlines, at Lincoln. Patroni is told to move the disabled aircraft blocking the runway two zero. Patroni spends the rest of the movie with his men to dig the plane out of the snow and fights with the pilots to do so under the aircraft's own power without damaging it.Meanwhile, Bakersfield deals with his brother-in-law Vern Demerest (Dean Martin), a pompous and self-confident senior pilot for Trans America Airlines who opposes Bakersfield on a number of issues involving business and personal issues. Both Mel Bakersfield and his sister Sarah (Barbara Hale) are unaware that Vern is having an extramarial affair with Gwen Meighen (Jacqueline Bisset), a chief stewardess on his routine flights whom is planning her latest trip to Rome, Italy and is frustrated about her secret affair with Vern who keeps telling her that he will leave his wife.Back at Lincoln Airport, the closing of runway two zero due to the stuck plane requires the use of shorter runway two-five, which has the unfortunate consequence of causing planes to take off over a noise-sensitive suburb, whose residents picket the airport in protest. Mel Bakersfield instists that the airport stay open despite pressure from the owner and the mayor to close it for the night.A little later, the airport authorites arrest an elderly lady named Mrs. Ada Quonsett (Helen Hayes) whom is attempting to board a plane without a ticket. Ada is brought to the TGA lounge office where he and Tanya discover her to be a frequent stowaway whom has a long record of stowing away aboard cross-country flights and passes herself off as the "poor old lady" to get away with it. Mrs. Quonett is put in the custody of a TGA agent to be put on a flight back to her home in California, but gives him the slip.Meanwhile, D.O. Guerrero (Van Heflin) is an increasingly psychologically-disturbed, bankrupt building contractor and demolitions expert, who is determined to find a way to solve his financial problems, regardless of what it will cost others. After having signed up for a $225,000 life insurance policy, he plans to commit suicide by blowing up a Rome-bound Boeing 707 Intercontinental jet over the Atlantic Ocean so his wife Inez (Maureen Stapleton), who manages a seedy diner, can collect the insurance money since a plane crashing in the ocean leaves no trace of evidence for the insurance company to investigate his death. He leaves their apartment on the ruse that he intends to take a bus to another part of town to meet with a potential employer. When Inez arrives home and finds a special delivery from the travel agency who issued his plane ticket, she heads off to the airport to try to stop him.Gwen and Vern arrive at Lincoln to board their Flight 2 to Rome and she tells him that she just learned that she's pregnant. As the plans begins to board, Ada stows away on plane and sits next to Guerrero whom is behaving nervously, holding his briefcase (with the bomb in it) on his lap, intending to detonate it once the plane is over the ocean.After the plane takes off, Guerroero's wife arrives too late at the airport and goes into a state of shock. When she is brought to the security office after she is found wondering around, she manages to tell them about her husband and what he intends to do. Bakersfield learns about this and has Flight 2 contacted to inform Vernon as well as the co-pilot Captain Harris (Barry Nelson) about the bomb on board. Also learning that Ada is on board the flight and sitting next to Guerrero, Bakersfield contacts Vernon on board the flight to turn the plane around back for Chicago.As the plane is being turned around, Gwen approaches Ada, loudly exposing her as a stowaway while ignoring Guerrero, in a ruse to bring her to the cockpit, where Ada is let in on what is going on. Ada agrees to help create a diversion. When she is brought back to her seat by Gwen, Vern appears and attempts to lunge at Guerrero who figures out what is going on and stands up out of his seat. Gwen manages to grab the briefcase, but another passenger, thinking they are wrongly grabbing "personal property," tosses it back to Guerrero. Vern tries to persuade Guerrero not to trigger the bomb but Guerrero runs into the lavatory at the rear of the aircraft and triggers the bomb. The detonation blows a large hole in the plane, killing Guerrero and seriously injuring Gwen. The plane is structurally damaged in the explosion and subsequent rapid decompression.As Flight 2 returns to Lincoln, Vern learns that the short runway two five is unable to handle the landing of the damaged plane so Flight 2 must land at runway two zero which still has the stuck-in-the-snow plane on the runway. Patroni and his men are still trying to dig the plane out of the snow and after hearing about the emergency, he goes into the cockpit and attempts to rev up the engines to free the plane, which after a tense minute, Patroni finally manages to do so without damaging the runway or the plane.After a harrowing flight back, Vern manages to land the plane and save the rest of the passengers and crew. After everyone had disembarked, he decides to accompany the badly injured Gwen to the hospital where his wife sees him and becomes aware of his extramarital affair. He has decided to leave his wife to be with Gwen.After Mrs. Ada Quonsett is cleared of all criminal charges of stowing away, she is given a first class ticket to return to her hometown.His marriage over, Mel Bakersfield asks Tanya if she would like to "have breakfast" at her apartment with him and she happily agrees.
question: What flight does Mrs. Quonsett board ?
answer: Flight 2