Flights for UA9921 These are not all the flights that UA9921 has taken, just some of them that have flown in or out of SFO

UAL9921 (DEN-SFO)
This United Airlines flight traveled from Denver International Airport to San Francisco International Airport, on April 11, 2011. Passengers were flying aboard a Boeing 767-300. See all the flights for UA9921.
UAL9921 (HNL-SFO)
This United Airlines flight traveled from Honolulu International Airport to San Francisco International Airport, on November 27, 2011. Passengers were flying aboard a Boeing 747-400. See all the flights for UA9921.
UAL9921 (IAD-SFO)
This United Airlines flight traveled from Dulles International Airport to San Francisco International Airport, on July 03, 2011. Passengers were flying aboard an Airbus A320-200. See all the flights for UA9921.
UAL9921 (LAS-SFO)
This United Airlines flight traveled from McCarran International Airport to San Francisco International Airport, on May 15, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA9921.
UAL9921 (LAS-SFO)
This United Airlines flight traveled from McCarran International Airport to San Francisco International Airport, on August 06, 2011. Passengers were flying aboard a Boeing 767-300. See all the flights for UA9921.
UAL9921 (LAS-SFO)
This United Airlines flight traveled from McCarran International Airport to San Francisco International Airport, on December 03, 2010. Passengers were flying aboard a Boeing 757-200. See all the flights for UA9921.
UAL9921 (LAX-SFO)
This United Airlines flight traveled from Los Angeles International Airport to San Francisco International Airport, on October 14, 2011. Passengers were flying aboard a Boeing 777-200. See all the flights for UA9921.
UAL9921 (LGA-SFO)
This United Airlines flight traveled from LaGuardia Airport to San Francisco International Airport, on February 24, 2011. Passengers were flying aboard an Airbus A319. See all the flights for UA9921.
UAL9921 (MEX-SFO)
This United Airlines flight traveled from Benito Juarez International Airport to San Francisco International Airport, on March 23, 2011. Passengers were flying aboard an Airbus A320-200. See all the flights for UA9921.
UAL9921 (NRT-SFO)
This United Airlines flight traveled from Narita International Airport to San Francisco International Airport, on May 04, 2011. Passengers were flying aboard a Boeing 747-400. See all the flights for UA9921.
UAL9921 (OAK-SFO)
This United Airlines flight traveled from Oakland International Airport to San Francisco International Airport, on June 05, 2011. Passengers were flying aboard an Airbus A319. See all the flights for UA9921.
UAL9921 (OGG-SFO)
This United Airlines flight traveled from Kahului Airport to San Francisco International Airport, on July 07, 2011. Passengers were flying aboard a Boeing 767-300. See all the flights for UA9921.