Miami Airport Baggage Allowances by Airline (2026)

Baggage allowances at Miami International Airport depend on your airline and, crucially, your fare type, not on the airport itself. The same suitcase can fly free on one ticket and cost $55 on another with the same airline. Pick your airline and fare in the checker below to see your exact Miami airport baggage allowance: what you can bring, what the checked bags cost, and where the overweight fees start.

Why your ticket type matters more than your airline

Almost every carrier flying from MIA now sells several fare brands, and the cheapest one usually strips the baggage out. American calls it Basic Economy, Avianca calls it Basic, Lufthansa calls it Economy Light, Turkish Airlines calls it EcoFly. The pattern is the same: the headline price covers a seat and a small personal item, while the carry-on suitcase or the checked bag becomes a paid extra. Travelers who booked the cheapest fare often discover this at the check-in desk, where the fees run higher than online.

A few useful patterns to know before you book from Miami:

• On Avianca, LATAM and Frontier basic fares, even the carry-on suitcase is not included. You board with a small under-seat bag only.
• US carriers (American, Delta, JetBlue, Southwest, Alaska) include the carry-on on all fares; what varies is the checked bag price, typically $45 to $55 for the first bag when booked online.
• On routes to Latin America, several carriers price bags differently than on US domestic legs, and some fares that include a bag elsewhere do not include it on US routes at all. Aeromexico, for example, includes no free checked bag in any economy fare between the US and Mexico.
• Frontier's checked bag limit is 40 lb, not the usual 50 lb, so a bag that flies fine on American may already be overweight on Frontier.

The 50 lb rule and the hard 70 lb ceiling

The standard checked bag at MIA weighs up to 50 lb (23 kg) in economy and 70 lb (32 kg) in business or first. Between those two numbers airlines charge an overweight fee, roughly $30 to $200 depending on the carrier and how heavy the bag is. Above 70 lb (32 kg) most international carriers simply refuse the bag at any price, so repacking at home beats arguing at the counter. If your bag hovers near the limit, weigh it before leaving: bathroom scales are close enough to save you a surprise.

Three ways to avoid baggage fees at MIA

First, pay for bags online in advance. Nearly every airline charges less on the website than at the airport, and low-cost carriers raise the price again at the gate. Second, check the fare comparison before buying the cheapest ticket: a Classic or Main Cabin fare with a bag included is often cheaper than a Basic fare plus a separately purchased bag. Third, watch the booking date fine print: several US carriers raised their fees in April 2026, and the price that applies is tied to when you bought the ticket, not when you fly.

A note on Spirit Airlines

Spirit Airlines ceased all operations on May 2, 2026. If an older guide still quotes Spirit's bag prices for Miami, that information is obsolete; the airline no longer flies. Our checker covers only carriers currently operating from MIA.

Where the numbers come from

Every figure in the checker is taken from the airline's official baggage page, and each result links to that source so you can verify it in one click. Prices marked "from" or "dynamic" vary by route and date; for those, treat our number as the starting point and confirm the exact fee in the airline's own calculator. We review the data regularly and show the last update date inside the widget. This page was last updated on July 4, 2026.