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Defense Travel Management Office (DTMO)  

4800 Mark Center Drive                                                            
Suite 04J25-01
Alexandria, VA 22350-9000


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Travel Assistance

General Travel and Travel System Questions

Contact your Local Level Travel Support first.

For Defense Travel Modernization (DTM) prototype tech support, call 1-844-308-6880

If your issue cannot be resolved through Local Level Support, contact the Travel Assistance Center (TAC):

  • Live Chat for select issues (available Mon-Fri 8am – 6pm ET except federal holidays)

  • Login to Passport and submit an online help desk ticket through TraX.
    (available 24/7)

  • 1-888-Help-1-Go (1-888-435-7146) (available 24/7)

Travel Reservation Questions
or Changes to a Reservation
While on Travel

Contact your Travel Management Company (TMC) listed on your travel itinerary or use the TMC Directory  

 If you booked your reservations through the Defense Travel Management prototype, call

Government Travel Charge Card Questions

Contact your local Agency Program Coordinator (APC)

Citi Customer Service:
(collect 757-852-9076)

Citi Customer Service For APCs:
(collect 757-853-2467)



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