DOT Fee Transparency Rule 2024: Airlines Must Disclose Fees Before You Buy

In 2024, the Department of Transportation finalized a rule requiring airlines and booking platforms to display ancillary fees before a passenger selects a flight. The rule applies to US carriers on all routes and to foreign carriers operating flights to or from the United States.

Core requirement: Fees for checked bags, carry-on bags, seat selection, and flight changes or cancellations must appear alongside fares during comparison shopping, not buried at checkout.

The rule targets the long-standing practice of advertising low base fares while hiding fees that raise the real cost by $50 to $200 per trip. The DOT determined this practice violated 49 U.S.C. 41712, which prohibits unfair and deceptive practices by airlines. See the US passenger rights guide for the broader legal framework.

Four categories of fees must be disclosed before a passenger chooses a fare:

1. 1

   Checked bag fees, including first bag, second bag, and oversized baggage charges

2. 2

   Carry-on bag fees for carriers that charge for cabin bags

3. 3

   Seat selection fees, including advance seat assignment charges

4. 4

   Cancellation and change fees, including applicable fare difference rules

The disclosure must appear in context, meaning next to the fare during the comparison shopping step. Linking to a separate fee schedule page does not satisfy the requirement.

The rule covers US airlines and foreign carriers selling flights to, from, or within the United States. Online travel agencies and metasearch platforms that sell covered itineraries must also comply with the same disclosure requirements.

Third-party booking sites such as Expedia and Google Flights must display the same fee information as the airlines themselves. The compliance obligation follows whoever facilitates the transaction.

Tickets purchased before the rule's effective date are not retroactively covered. The disclosure requirement applies at the point of sale going forward.

The DOT's rulemaking record documented consumer harm from opaque ancillary fees. Research showed passengers routinely underestimated total trip costs because base fares appeared competitive while fees added significant charges later in the booking process.

Congress directed the DOT to address fee transparency in the FAA Reauthorization Act. Airlines argued that existing disclosures were adequate, but the DOT found them insufficient for meaningful fare comparison. The agency published its findings in the Federal Register under 14 CFR Parts 250, 253, and 259.

This rule is part of a broader DOT consumer protection initiative that also includes the 2024 automatic cash refund rule and updated DOT bumping compensation rules.

If an airline or booking platform did not show fees before you selected a fare, take these steps:

1. 1

   Screenshot the booking flow showing fees were absent during fare selection

2. 2

   Complete the booking and save your confirmation number

3. 3

   Contact the airline or platform requesting a refund of any undisclosed fees

4. 4

   If refused, file a complaint at the DOT Air Consumer Division at transportation.gov/airconsumer

5. 5

   Include screenshots and your booking confirmation in the complaint submission

Tip: If your complaint also involves a canceled flight or significant delay, TravelStacks can file a DOT refund claim for $19.

The DOT publishes monthly Air Travel Consumer Reports tracking complaint volumes by airline. Individual complaints feed enforcement investigations even when they do not generate direct compensation.

The rule requires disclosure, not fee caps. Airlines may still charge whatever fees they choose. Dynamic pricing of ancillary fees is permitted as long as the applicable fee is displayed before fare selection.

Pet fees, unaccompanied minor fees, and charges for special assistance are not currently covered. The DOT has signaled possible future expansion of the rule to additional fee categories.

The rule does not directly address award tickets purchased with miles or points. Those bookings operate under different terms set by each carrier's frequent flyer program.

Transparency rules govern what you are shown before you buy. Refund rules govern what happens to your money when a flight is disrupted. Both are enforced by the DOT's Office of Aviation Consumer Protection, but they are separate regulations.

If an airline charges you a fee it did not disclose and then cancels your flight, you may have grounds under both rules: a transparency violation for the undisclosed fee and a refund right for the canceled flight. See DOT refund timelines and airline credit vs cash refund rights for more.

For the official rule text, see the DOT Air Consumer Division guidance pages and the Federal Register notice for 14 CFR Parts 250, 253, and 259. The DOT also maintains a fee disclosure resource at its Fly Rights page.

Related guides: DOT complaint outcomes, how to file a DOT complaint, DOT refund rule significant changes. Full overview at US passenger rights guide.