Endorsements of John Flerlage for U.S. Congress
- United Transportation Union
- Sheet Metal Workers’ Local #9
- Colorado American Federation of Labor and Congress of Industrial Organizations (Colorado AFL-CIO)
- American Federation of State, County and Municipal Employees’ (AFSCME) Colorado Council 76
- National, State, and Local FIRE FIGHTERS
- Senator John Kerry, U.S. Senator, Massachusetts
- Delta Air Lines Political Action Committee
- Russell L. Bonder, Sr Vice President of Wells Fargo Capital and former Marine Infantry Officer
- United Food and Commercial Workers, Local 7 (UFCW-7)
- Veterans' Alliance for Security and Democracy (VET PAC)
- International Association of Fire Fighters
- Former U.S. Senator Max Cleland
- Senator Mark Udall, U.S. Senator, Colorado
- Senator Michael Bennet, U.S. Senator, Colorado
- Representative Joe Sestak, Pennsylvania's 7th District
- Senator Gary Hart, former U.S. Senator, Colorado
- Governor Richard Lamm, former governor, Colorado
- Senator Joan Fitz-Gerald, former state senate president, Colorado
- Senator Dan Gibbs, senate district 16, Colorado
- Senator Linda Newell, senate district, 26, Colorado
- Senator Suzanne Williams, senate district 28, Colorado
- Senator Morgan Carroll, senate district 29, Colorado
- Representative Su Ryden, house district 36, Colorado
- Representative Nancy Todd, house district 41, Colorado
- Commissioner Kathy Hartman, Jefferson County
- Jefferson County Democratic Latino Initiative
Former nominees of the 5th and 6th Districts
- Hank Eng 2008
- Bill Winter 2006
- Henry Strauss 1998
- Joan Fitz-Gerald 1996
- Hal Bidlack 2008
- Cal Johnston 1990
- Colorado State Legislative Board of the Brotherhood of Locomotive Engineers & Trainmen (BLET)
- Delta MEC
- Air Line Pilots Association (ALPA)
- Pilots of United Airlines
- Southwest Airlines Pilots' Association (SWAPA)
