Stop — Do This in DTS Before You Cancel Anything
TDY travel has gotten complicated with all the last-minute order changes flying around. As someone who went through a painful lesson involving a Fort Leonard Wood TDY, a 6 p.m. phone call, and nearly $340 out of my own pocket, I learned everything there is to know about the right order of operations. Today, I will share it all with you.
One non-negotiable action before anything else: open your Defense Travel System account and amend the authorization. Before you touch a single hotel cancellation. Before you rebook a flight. The amendment comes first — always.
My unit called on a Tuesday evening. The trip was pushed two weeks out. My gut said call the hotel, cancel the Southwest ticket, sort it out later. That instinct almost wrecked me financially. Don’t make my mistake.
Here’s the part that trips people up. The authorization is the funding document. Cancel hotels and flights without amending DTS first, and you’re spending government money against an order that no longer reflects reality. Even if it all gets untangled eventually, the audit trail has a gap — and your unit’s accounting office will find it. Finance flags it. Your officer questions the expense. Worst case, you’re told to reimburse the government for spending against an invalid authorization. That’s a months-long headache you don’t want.
Amend DTS first. Everything else flows from that.
How to Amend Your TDY Authorization in DTS
Log in with your CAC. Go to “My Authorizations,” find the existing authorization, and hit “Edit” — not “Create New,” not “Duplicate.” Edit the one that already exists. That distinction matters more than it sounds.
Change the dates. Change the location if that shifted. Three days became five? Update the return date. City changed? Update the duty location. Some amendments need a new Line of Accounting if funding crosses cost centers or fiscal years — your Authorizing Official will catch this on review, but knowing upfront means you won’t be blindsided when they kick it back.
In the “Remarks” field — and this genuinely matters — write something like: “TDY dates amended per verbal order change from [unit name] on [date]. Original authorization [number] amended due to command direction, not member request.” Specific. Factual. Timestamped. That language protects you later.
Hit “Submit for Approval.” Then pick up the phone immediately.
Call your AO directly — not tomorrow, today. AOs are buried in approval queues and your amendment could sit untouched for 48 hours while your hotel cancellation window quietly closes. A 90-second call — “Hey, I just submitted an amendment for authorization [number], dates only, can you prioritize this?” — gets results. Email gets you a gamble. Probably should have mentioned this earlier, honestly, because that phone call is arguably the most important step of the whole process.
Once the AO approves the amendment, you have a valid authorization for the new dates. Now you cancel the hotel. Now you rebook the flight. You’re no longer operating in a gray zone — the paperwork reflects reality and reality reflects the paperwork.
Who Pays for Hotel and Flight Change Fees
This is where soldiers get burned worst.
But what is the governing rule here? In essence, it’s this: the military pays change fees when the military caused the change, and you pay when you caused it. But it’s much more than that — because without documentation, proving who caused what becomes a fight you might lose.
Government-rate hotel chains — La Quinta, Motel 6, most mid-tier properties holding GSA contracts — typically waive cancellation fees before the deadline, usually 6 p.m. on the day of arrival. Last-minute order changes sometimes land after that window. You’ll eat a one-night penalty. That charge is reimbursable if the order change wasn’t your call — but you have to document it.
When you file your voucher, screenshot the hotel cancellation confirmation showing the charge. Attach it to the “Itemized Statement of Expenses” section. In the remarks field: “One-night cancellation fee for [hotel name] due to amended TDY orders, change directed by [unit], not member discretion. See attached cancellation confirmation dated [date].” Your Voucher Approver will honor it. Order changes happen — they know this.
Flights are messier. Southwest might be the best option, as TDY travel requires flexibility. That is because Southwest lets you move flights to any future date with just the fare difference — no flat change fee. American, United, and Delta charge $75 to $200 in change fees on top of any fare difference, and that cost lands on you personally unless command-directed order changes can be proven with documentation. Spirit and Frontier? Nonrefundable tickets there are nightmare fuel for TDY travel. Don’t book them. Ever.
The critical error — and I’ve seen this wreck people — is booking outside DTS entirely. Book your flight on a personal card through Kayak or directly with an airline and you’re operating as a private citizen, not a service member on orders. Consumer cancellation policies apply, not government rates. You can still claim the expense if everything goes smoothly, but when something breaks, you’re liable first. The military will eventually reimburse you — eventually, in weeks, through a separate reimbursement voucher process you really don’t want to deal with when you’re already stressed.
Always book through DTS. Always.
What to Do If Your Orders Are Canceled Entirely
An amendment is one thing. Full cancellation is different.
Frustrated by the lack of written backup, soldiers sometimes accept verbal cancellations and move on — then find themselves holding uncanceled reservations with no documentation trail when finance asks questions. Get it in writing. Email counts. Slack message from your commander counts. Text message chain counts. Verbal-only cancellations need to be followed with an immediate “can you shoot me something in writing?” That’s not being difficult. That’s protecting yourself.
In DTS, you don’t delete the authorization. You amend it to reflect zero days or mark it “Canceled.” Your AO guides you through this, but the authorization stays in the system as a closed record — an audit trail showing the TDY was officially terminated, not abandoned.
Any expenses already incurred before cancellation notice — rental car deposit, parking, meals if travel had already started — are still claimable. File a partial voucher. List every expense. Attach cancellation confirmations. In the remarks: “TDY canceled by command on [date]. Listed expenses were incurred prior to receiving cancellation notice.” Clean, simple, documented.
If you’d already arrived at the TDY location when the cancellation came down, same rules apply. File a partial voucher for everything spent. You didn’t choose to leave early or skip the trip — command made that call. The paper trail shows that. That’s what makes the DTS documentation system endearing to us service members navigating all this.
How to Protect Yourself from Out-of-Pocket Losses
Probably should have opened with this section, honestly.
While you won’t need a legal team or a finance specialist on speed dial, you will need a handful of habits locked in before your next TDY kicks off. First, you should always book through DTS — at least if you want government cancellation protections to apply. Government hotel rates carry government cancellation policies. Government airline contracts carry government change terms. The system was designed to handle exactly this problem. Use it.
I’m apparently the kind of traveler who always defaults to Southwest and books through DTS, and that combination works for me while nonrefundable personal bookings never have. A “cheap” $180 Spirit fare is cheap until orders change and that $180 disappears with zero recourse. That was a real number a real soldier in my unit lost. Don’t make my mistake.
Keep every message showing the change came from command. Screenshot emails. Save Slack threads. Screenshot text chains. Save your AO’s DTS approval notification. When you file your voucher, those screenshots become your evidence — finance sees immediately that you didn’t create this problem, and they process the claim without pushback.
So, without further ado, let’s be direct about what this all comes down to: one amendment in DTS before you cancel anything, one call to your AO the same day, one screenshot of the order change from command. That’s the difference between a minor headache and months of fighting the military’s accounting system for money you’re owed. The reimbursement structure works — but only when you leave a paper trail. Skip the documentation and you’ve got nothing but your word against an audit log that doesn’t know you.
One call. One amendment. One screenshot. That’s it.
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