Budget Airline or Regular Airline? Doing the Fare Math
Key points
- The Department of Transportation estimated in 2024 that consumers overpay about $543 million a year in airline fees.
- A roundtrip carry-on can cost $39 to $90 on many low-cost carriers, while a first checked bag runs about $35 each way on domestic routes.
- Ultra-low-cost fares typically include only one small personal item, with carry-on and checked bags costing extra.
- Federal rules require automatic refunds when a paid service like seat selection is not provided or a checked bag is badly delayed.
- Compare all-in totals, including transfers from each airport, instead of deciding on the headline fare.
A bargain fare and a standard fare on the same route can finish within a few dollars of each other once the extras land. Checked bags, carry-on allowances, seat assignments and the ride from the airport all shift the math. The Department of Transportation estimated in 2024 that consumers overpay about $543 million a year in fees like these, and a federal appeals court has since vacated the rule that would have required airlines to disclose those fees upfront. No booking site will total them for you, so the job falls to the traveler.
Why the Base Fare Is Only the Start
The ticket price is not where airlines make their money anymore. US carriers collected $7.3 billion in baggage fees in 2024, up from $7.1 billion in 2023, and low-cost carriers deliberately move costs out of the fare and into paid add-ons. Basic economy, now offered across nearly every major US airline, usually covers transportation and a small personal bag and little else.
The sticker price hides non-airline extras too. The FTC has flagged pre-selected charges, such as a tip or a paid support tier, that make a checkout total look final until you scroll down. Its advice applies to any booking: review every checkbox and toggle, deselect anything you did not choose, and compare the final total to the price you started with. Timing matters as well, and our flight booking timeline explains when to shop before you compare carriers.
Those totals only mean something against a whole-trip budget. Our guide to travel budget basics covers what a getaway should cost overall.
Baggage: Carry-On Rules Vary Wildly
Across most large US carriers on domestic routes, a first checked bag costs approximately $35 each way. On many hybrid, low-cost and ultra-low-cost carriers, a roundtrip carry-on can run between $39 and $90. Two travelers with roller bags can therefore add more than $100 roundtrip to what looked like a bargain.
Ultra-low-cost carriers enforce the rules hardest. The ticket typically includes exactly one free item, a small personal item such as a laptop bag or backpack, and anything larger costs extra. Airports keep baggage sizers on hand to catch oversized bags, and the dimension limits are applied strictly. Policies travelers remember can also vanish: one major US airline ended its long-standing two free checked bags perk in 2025, so shopping from memory is no longer reliable.
On standard economy fares, checked bags generally must weigh 50 pounds or less and stay under 62 linear inches before oversize fees apply. Limits vary by route and fare, so confirm the numbers for your airline before you pack.
Seats, Boarding and Checkout Extras
Budget fares also remove comforts regular fares include. On ultra-low-cost carriers, picking a seat, boarding early or sitting next to a companion each carry a charge, and even water can cost extra. Basic economy restricts seat selection and boarding in similar ways.
Bag and seat fees are also often higher at the airport than in the app, so buy any extras you know you need during the booking process instead of at the counter.
The Airport You Land At and the Ride Into Town
Two fares are only comparable if they put you in the same place. A cheaper ticket that uses a more distant airport can lose its edge once you price the transfer. Distance is the biggest driver of that cost, and late-night or early-morning pickups can carry surcharges. Rideshare prices can spike at busy airports, taxi meters climb with traffic, and shared shuttles trade a lower fare for extra stops. For groups, one private vehicle priced per ride sometimes costs less per person than several taxis.
Changes, Cancellations and Refunds
The lowest fare is usually the least flexible one, which matters if plans might move. Check the change and cancellation terms for both tickets before you commit to either.
Federal refund rules apply to both kinds of ticket. Under Department of Transportation rules, if you pay for an ancillary service such as seat selection or Wi-Fi and it is not provided, you are owed an automatic refund. A checked bag fee is refundable when your bag is not delivered within 12 hours on a domestic flight, or within 15 to 30 hours internationally depending on flight length. Schedule shifts count too: a domestic departure or arrival that moves by 3 or more hours, or 6 or more hours on an international flight, counts as a significant change under the rule.
When the Budget Option Wins, and How to Check Yours
| Cost item | Basic economy or budget carrier | Standard economy fare |
|---|---|---|
| Bags | One small personal item included; a roundtrip carry-on can add $39 to $90 | Carry-on typically included; a first checked bag runs about $35 each way |
| Seats | Seat selection costs extra, including sitting together with a companion | Seat selection typically available, though premium seats may still cost extra |
| Changes and refunds | The most restricted tier; read the terms before relying on flexibility | More flexibility on paper, but terms vary by fare, so check them |
| Checkout surprises | Pre-selected add-ons are common; review every checkbox | Fewer add-ons, but still compare the final total to the quoted fare |
The budget fare suits travelers who pack a small backpack, fly alone, care mostly about price and will not change their dates. The standard fare suits families, anyone checking a bag, couples who want guaranteed seats together, and travelers who might need to move a trip. Our guide to flying with kids covers why predictability matters more with children aboard.
To compare any two fares, run both through the same short worksheet:
- Start with each base fare.
- Add the bags you will actually bring.
- Add seat selection if sitting together matters to you.
- Price the transfer from each airport, both directions.
- Read the change and cancellation terms.
- Compare the all-in totals, not the headlines.
Travel tip
If you know you will check a bag or want a specific seat, buy it when you book the ticket. Fees often climb at the airport, and waiting turns a fair comparison into a guess.
Whichever ticket looks cheaper, add up its real total first and book the one that costs less all in.
Questions travelers ask
Do budget airlines always end up more expensive?
No. If you travel with one small personal item and keep your dates fixed, a budget fare often costs less all in. The extras decide it, so run both fares through the same worksheet before booking.
What baggage is included on a basic economy ticket?
Usually just a small personal item, such as a laptop bag or backpack. Carry-on and checked bags generally cost extra, and the size limits are enforced closely at the airport.
Can I get my money back if a paid seat or bag service fails?
Under Department of Transportation rules, you are owed an automatic refund if a paid ancillary service is not provided. A checked bag fee is refundable when the bag is not delivered within set time limits.
Why do fees sometimes cost more at the airport?
Bag and seat charges are often higher at the counter than in the app, which is why it pays to buy any extras you know you need during booking.