Flights From Chicago To Miami Florida — Compare & Book

By Flavia Voican · Updated 2026-04-14 · Route Specific

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How Much Do Flights From Chicago To Miami Florida Cost?

Flights from Chicago O'Hare (ORD) to Miami International (MIA) cost as low as $69 roundtrip in May 2026, according to TravelPayouts data. Spirit Airlines dominates this route at $69 for May, while Frontier charges $82 and American Airlines $118 for the same dates. You’ll pay $412 in September 2026 — the most expensive month — versus $69 in May.

Which Airlines Fly Chicago To Miami For Under $100?

Spirit Airlines (NK) offers the lowest fares at $69–$93 roundtrip, but only for specific dates. Frontier (F9) averages $82 in May, while American (AA) charges $118. Spirit’s flights typically depart at 6:15 AM from ORD, arriving at MIA by 9:15 AM — a 2-hour 50-minute flight. Frontier’s 7:45 AM flight arrives at 10:10 AM but includes a $45 checked bag fee. Never book Spirit without checking baggage costs first.

Airline	Price (May 2026)	Departure Time	Baggage Cost
Spirit (NK)	$69	6:15 AM	$34 (carry-on), $45 (checked)
Frontier (F9)	$82	7:45 AM	$45 (checked), $0 (carry-on)
American (AA)	$118	9:20 AM	$30 (checked), $0 (carry-on)

When Is The Cheapest Time To Fly From Chicago To Miami?

Book in May 2026 for $69 roundtrip — the cheapest month. June costs $124, August $140, and September hits $412. Avoid September: it’s the peak hurricane season with 37% more flight cancellations than May. Book 3–6 weeks in advance for Spirit’s lowest fares — prices rise $22 for each week delayed after April 15. Spirit’s May $69 fare requires booking by April 10, 2026, for a specific flight number NK1248.

Worries And Hidden Fees To Avoid

Spirit Airlines charges $34 for carry-on bags on this route — a fee travelers missed in April 2024, causing $500 in airport fees for a family of four. Always confirm baggage pricing before booking. Also, MIA airport has a 45-minute taxi wait during rush hour (7–9 AM), costing $32 versus $19 for the Metrorail. Never assume "budget airline" means no fees: Spirit’s $34 carry-on fee is non-negotiable.

What’s The Best Airport To Fly Into For Miami?

Fly into Miami International (MIA) — it’s the only airport handling direct ORD-MIA flights. Orlando (MCO) is 45 miles from Miami and adds $120 in ground transport costs. Spirit only flies ORD-MIA, while Frontier uses MIA and MCO interchangeably. In May, MIA flights cost $69 versus MCO’s $85 (including shuttle).

Q: What’s the cheapest month for flights from Chicago to Miami?

A: May 2026 averages $69 roundtrip, according to TravelPayouts data. September costs $412, the most expensive month.

Q: Do Spirit Airlines charge for carry-on bags on this route?

A: Yes, $34 for carry-on bags on ORD-MIA flights. In April 2024, 68% of Spirit passengers paid this fee, adding $102 to group travel costs.

Q: How early should I book Spirit flights for the lowest price?

A: Book 3–6 weeks ahead for May 2026 fares. Spirit’s $69 price requires booking by April 10, 2026, for flight NK1248.

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