We all hate finding a cheap flight, adding a bag and watching the price turn into something completely different from what we expected.
Now imagine having to look more carefully just to find the total price before adding any extras at all.
A proposed U.S. Department of Transportation rule would give airlines and booking sites more freedom over how they display fares, taxes and mandatory fees. The complete price would still have to appear, but it may no longer need to stand out more than the smaller fare components competing for your attention.
Nothing has changed for travelers yet. This is still a proposed rule, not a final decision. But the public-comment period ended on August 21, 2026, which means the proposal has moved into the stage where the department reviews the record and decides what comes next.
If the proposal becomes final, that tempting number you notice first might not be the amount you actually pay.
Why the first price currently includes all mandatory charges
Since 2012, airlines and ticket agents have generally been required to display the complete mandatory airfare the first time they quote a price. That includes government taxes, carrier-imposed surcharges and other charges every traveler must pay to purchase the ticket.
It does not necessarily include the full cost of the trip. Airlines can add separate charges for services the government considers optional, including checked baggage, seat selection and priority boarding. That is how a budget airline can advertise a very low fare even when the price many travelers ultimately pay is considerably higher.
Airlines must disclose those optional charges, but they do not have to build them into the first advertised fare because a passenger can technically decline them and still travel.
Under the current rule, airlines may also show the base fare, taxes and other mandatory components separately. However, those smaller figures cannot be displayed as prominently as the complete mandatory price.
The rule took effect after travelers complained that advertised fares could rise substantially when mandatory taxes and airline charges appeared later. DOT concluded that consumers needed to see the complete mandatory price upfront to compare flights accurately.
The department’s current airfare-advertising proposal would change how prominently those mandatory components may appear. The total would still have to be displayed, but an airline could present a lower base fare or a tax component just as prominently.
The bigger question is whether the full-fare rule could disappear
The proposal goes further than adjusting typography. DOT also requested comments on whether it should repeal the full-fare rule in its entirety.
That is not the same as announcing that the rule will be eliminated. The agency did not publish specific replacement language for a repeal, and a final rule could be narrower than the possibilities discussed in the proposal—or it could keep the existing requirement.
Still, the difference matters. If the full-fare rule disappeared, an advertised price might not immediately represent the complete amount required to buy the ticket. Travelers could have to click farther into the booking process before seeing how taxes and mandatory carrier charges affect the final total.
Optional extras such as checked bags, assigned seats and upgrades are already separate from the advertised base ticket in many searches. The concern here is different: whether the first displayed fare must include every mandatory amount attached to the transportation itself.
Even Southwest warned that a full repeal could be disruptive
Southwest Airlines asked DOT for more time to analyze the proposal. Although the airline supported considering narrower changes to the display rules, it preliminarily opposed eliminating the full-fare requirement.
In a filing summarized in the Federal Register notice extending the comment period, Southwest said travelers have spent 14 years shopping with the expectation that government taxes and fees are included in the first displayed fare. The airline warned that changing that established system could be extremely disruptive.
The practical problem is comparison shopping. Taxes can vary based on the number of flight segments. A nonstop itinerary and a connecting itinerary might initially appear to cost the same, while the connecting option ultimately carries a higher total because it includes more taxable segments.
If mandatory charges are not incorporated consistently into the first price, travelers may need to open several itineraries and advance deeper into checkout to learn which flight is actually cheaper.
What travelers should do while the proposal is pending
For now, continue expecting the advertised airfare to include mandatory taxes and charges. The existing rule remains in effect unless DOT completes the rulemaking process and adopts a final change.
- Compare the final checkout total. This is already smart practice because optional bags, seats and upgrades may not appear in the initial fare.
- Check what is included. Two tickets with the same final price can offer very different baggage, seat-selection and change policies.
- Be skeptical of unusually low promotional prices. Confirm whether the number shown is a full round-trip price, a one-way fare or a base amount accompanied by separate mandatory charges.
- Save the fare breakdown. A screenshot or emailed receipt can help if the amount charged does not match the price presented at checkout.
DOT’s air-consumer updates page will show whether the proposal advances or changes. Until a final rule is published, the important distinction is simple: airfare displays could become less straightforward, but they have not changed yet.
